Foldable tray
By designing a foldable pallet, utilizing wood-plastic composite boards and universal bearings for connection, and combining snap-fit and molding structures, the problems of high cost, large size, and large footprint of existing wooden pallets are solved, achieving space saving and transportation flexibility, while improving mechanical strength and service life.
Patent Information
- Application Number
- CN202520115497.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing wooden pallets are expensive, bulky, and require a large area, resulting in high transportation costs and a high labor demand.
The pallet features a foldable design, utilizing a first wood-plastic composite board and a second wood-plastic composite board connected by a universal bearing. It also incorporates multiple snaps and a molded, integrated groove and protrusion structure to achieve the foldable function of the pallet.
It reduces the overall cost and floor space of pallets, saves space, is suitable for transporting goods of different sizes, and improves mechanical strength and service life.
Smart Images
Figure CN223721437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of foldable pallets. BACKGROUND
[0002] Figure 1 It is the structural diagram of wood pallet in prior art. It is frame structure by strip plywood binding. Wood pallet can be used to transport photovoltaic assembly etc.
[0003] Existing wood pallet uses plywood material, cost is too high. Existing wood pallet is large in size, large in floor area, and high in labor and transportation cost required. INVENTION CONTENTS
[0004] The utility model provides a kind of foldable pallet to reduce the comprehensive cost and floor area of pallet.
[0005] The utility model achieves the above-mentioned purposes by the following technical solutions.
[0006] The utility model provides a kind of foldable pallet, comprising: first wood-plastic board, second wood-plastic board, universal bearing, multiple first buckles and multiple second buckles;
[0007] The first wood-plastic board and the second wood-plastic board are both rectangular plate and equal in side length;
[0008] Multiple recesses are provided on the first side surface of the first wood-plastic board, multiple convex structures are provided on the second side surface of the first wood-plastic board, the recesses and the convex structures on the first wood-plastic board are one-to-one corresponding and are die-integrally formed structures;
[0009] Multiple recesses are provided on the first side surface of the second wood-plastic board, multiple convex structures are provided on the second side surface of the second wood-plastic board, the recesses and the convex structures on the second wood-plastic board are one-to-one corresponding and are die-integrally formed structures;
[0010] The universal bearing connects one corner of the first wood-plastic board and the second wood-plastic board respectively, so that the first wood-plastic board and the second wood-plastic board can be switched among the following three states:
[0011] The first state, the first side surface of the second wood-plastic board covers the first side surface of the first wood-plastic board, and the boundaries of the two are flush;
[0012] The second state, the long side of the first wood-plastic board is butt jointed with the long side of the second wood-plastic board, the first side surface of the first wood-plastic board is flush with the first side surface of the second wood-plastic board;
[0013] The third state, the short side of the first wood-plastic plate is butted with the short side of the second wood-plastic plate, and the first side surface of the first wood-plastic plate is flush with the first side surface of the second wood-plastic plate;
[0014] The plurality of first buckles are arranged on two edges of the first wood-plastic plate connected by the corner where the universal bearing is located;
[0015] The plurality of second buckles are arranged on two edges of the second wood-plastic plate connected by the corner where the universal bearing is located;
[0016] The first buckles on the long side of the first wood-plastic plate and the second buckles on the long side of the second wood-plastic plate are arranged one by one and can be in a separable fixed connection state;
[0017] The first buckles on the short side of the first wood-plastic plate and the second buckles on the short side of the second wood-plastic plate are arranged one by one and can be in a separable fixed connection state.
[0018] The protruding structure on the first wood-plastic plate and the second wood-plastic plate is hollow, the bottom is closed, and the upper part is in communication with the corresponding groove. The bottom wall thickness of the protruding structure is equal to the thickness of the flat area of the corresponding wood-plastic plate. The outer peripheral dimension of the protruding structure is greater than the inner peripheral dimension of the corresponding groove.
[0019] The first wood-plastic plate and the second wood-plastic plate constitute two wood-plastic molded trays, and the shape can be customized, for reference website xinyizggs.com.
[0020] In some embodiments, the plurality of grooves on the first side surface of the first wood-plastic plate include: a plurality of triangular first reinforcing grooves, a plurality of circular second reinforcing grooves, and a plurality of curved third reinforcing grooves;
[0021] The plurality of protruding structures on the second side surface of the first wood-plastic plate include: a plurality of triangular first support columns, a plurality of circular second support columns, and a plurality of curved reinforcing ribs;
[0022] The groove depths of the first reinforcing grooves and the second reinforcing grooves are equal and greater than the groove depth of the third reinforcing grooves;
[0023] The heights of the first support columns and the second support columns are equal and greater than the height of the reinforcing ribs;
[0024] The ends of the third reinforcing grooves are all in communication with the second reinforcing grooves, and the ends of the reinforcing ribs are all connected to the second support columns;
[0025] The center connecting line of the first reinforcing grooves encloses the second reinforcing grooves and the third reinforcing grooves;
[0026] The center line of the first support column encloses the second support column and the reinforcing rib.
[0027] In some embodiments, the plurality of grooves on the first side surface of the second wood-plastic board comprises a plurality of triangular first reinforcing grooves, a plurality of circular second reinforcing grooves, and a plurality of curved third reinforcing grooves.
[0028] The plurality of protruding structures on the second side surface of the second wood-plastic board comprises a plurality of triangular first support columns, a plurality of circular second support columns, and a plurality of curved reinforcing ribs.
[0029] The groove depths of the first reinforcing grooves and the second reinforcing grooves are equal and greater than the groove depth of the third reinforcing grooves.
[0030] The heights of the first support columns and the second support columns are equal and greater than the height of the reinforcing ribs.
[0031] The ends of the third reinforcing grooves are all connected to the second reinforcing grooves, and the ends of the reinforcing ribs are all connected to the second support columns.
[0032] The center line of the first reinforcing grooves encloses the second reinforcing grooves and the third reinforcing grooves.
[0033] The center line of the first support columns encloses the second support columns and the reinforcing ribs.
[0034] The first support column is a triangular prism, and the second support column is a circular column, both of which serve to support the first wood-plastic board or the second wood-plastic board.
[0035] The reinforcing ribs serve to make the first wood-plastic board or the second wood-plastic board bear force evenly, thereby prolonging the service life.
[0036] In some embodiments, the second reinforcing grooves are arranged in a rectangular array, and the number of second reinforcing grooves arranged along the long side direction of the wood-plastic board is greater than the number of second reinforcing grooves arranged along the short side direction of the wood-plastic board.
[0037] The second support columns are arranged in a rectangular array, and the number of second support columns arranged along the long side direction of the wood-plastic board is greater than the number of second support columns arranged along the short side direction of the wood-plastic board.
[0038] In some embodiments, two third reinforcing grooves are connected between any two second reinforcing grooves arranged in a row or a column, one third reinforcing groove is located outside the center line of the corresponding two second reinforcing grooves, the other third reinforcing groove is located inside the center line of the corresponding two second reinforcing grooves, and both third reinforcing grooves protrude away from the center line of the corresponding two second reinforcing grooves.
[0039] Two reinforcing ribs are connected between any two adjacent second support columns along the row or column direction. One reinforcing rib is located outside the center line connecting the two corresponding second support columns, and the other reinforcing rib is located inside the center line connecting the two corresponding second support columns. Both reinforcing ribs protrude in a direction away from the center line connecting the two corresponding second support columns.
[0040] In some embodiments, the first reinforcing groove is shaped like an isosceles triangle, with the apex of the isosceles triangle pointing perpendicularly to the side of the wood-plastic composite board that is closest to the apex.
[0041] The first support column is in the shape of an isosceles triangle, with the vertex of the isosceles triangle pointing perpendicularly to the side of the wood-plastic composite board that is closest to the vertex.
[0042] In some implementations, the number of first reinforcing grooves with their apex pointing to any one of the shorter sides is at least two;
[0043] The number of first reinforcing slots whose apex points to any of the long sides is at least one;
[0044] The number of first support columns whose apex points to any of the shorter sides is at least two;
[0045] The number of first support columns whose apex points to any of the long sides is at least one.
[0046] In some embodiments, in the first state, the first wood-plastic composite board and the second wood-plastic composite board are mirror-symmetrical.
[0047] In some embodiments, the first and second latches are H-type latches. H-type latches have a simple structure and provide a secure connection.
[0048] Other known buckle types can also be used for the first and second buckles.
[0049] In some embodiments, a nut is pre-embedded at the connection point between the first wood-plastic composite board and the second wood-plastic composite board and the universal bearing. Threaded holes are opened on the outer circumferential surfaces at both ends of the universal bearing, and screws pass through the nuts and the threaded holes to fix the universal bearing.
[0050] The beneficial effects of the foldable tray of this utility model are as follows.
[0051] In its first state, the foldable pallet occupies a small area, saving space.
[0052] In its second state, the foldable pallet is suitable for transporting palletized goods with a small length-to-width ratio (e.g., a palletized photovoltaic modules).
[0053] In its third state, the collapsible pallet is suitable for transporting palletized goods with a large length-to-width ratio.
[0054] The rotation between the first wood-plastic plate and the second wood-plastic plate provides sufficient degrees of freedom.
[0055] In some embodiments, the flat plate area thickness of the first wood-plastic plate and the second wood-plastic plate is denoted as d1, and 13mm≤d1≤17mm.
[0056] In some embodiments, the vertical distance from the first side surface of the first wood-plastic plate and the second wood-plastic plate to the free end of the raised structure serving as a support is denoted as d2, and 115mm≤d2≤125mm.
[0057] In some embodiments, the vertical distance from the first reinforcing groove to the adjacent wood-plastic plate boundary is in the range of 60mm to 80mm.
[0058] In some embodiments, the first reinforcing groove is a regular triangle with a side length in the range of 55mm to 65mm.
[0059] In some embodiments, the distance from the center of the second reinforcing groove closest to the short side of the wood-plastic plate to the short side of the wood-plastic plate is in the range of 180mm to 220mm.
[0060] In some embodiments, the vertical distance from the center of the second reinforcing groove closest to the long side of the wood-plastic plate to the long side of the wood-plastic plate is in the range of 325mm to 375mm.
[0061] In some embodiments, the radius of the second reinforcing groove is in the range of 90mm to 110mm.
[0062] In some embodiments, the width of the third reinforcing groove is in the range of 8mm to 12mm.
[0063] The above size setting mode is beneficial to the stability of the load bearing of the wood-plastic plate.
[0064] At least part of the raised structures on the first wood-plastic plate and the second wood-plastic plate can serve as supports, and a forklift can be inserted into the gap between adjacent raised structures. At the same time, the grooves on the two also serve to distribute the force, improving the mechanical strength of the foldable pallet. The first wood-plastic plate and the second wood-plastic plate can be quickly molded, and the development cycle is short. BRIEF DESCRIPTION OF DRAWINGS
[0065] Figure 1 is a structural schematic diagram of a wood pallet in the prior art.
[0066] Figure 2 is a perspective view of a foldable pallet in an unfolded state according to an embodiment of the present application, in which the long sides of the first wood-plastic plate and the second wood-plastic plate are butted.
[0067] Figure 3It is the front view of the foldable tray in the unfolded state of the embodiment of the utility model, wherein the first buckle and the second buckle are ignored.
[0068] Figure 4 It is the plan view of the foldable tray in the long side butt joint state of the utility model.
[0069] Figure 5 It is the plan view of the foldable tray in the short side butt joint state of the utility model.
[0070] Figure 6 It is the perspective view of the first buckle and the second buckle.
[0071] Figure 7 It is the structure schematic view of the universal bearing.
[0072] Figure 8 It is the local schematic view of the foldable tray of the embodiment of the utility model.
[0073] The reference signs are as follows:
[0074] 11, first wood plastic plate; 12, second wood plastic plate;
[0075] H1, first reinforcing groove; H2, second reinforcing groove; H3, third reinforcing groove;
[0076] P1, first support column; P2, second support column; P3, reinforcing rib;
[0077] 2, universal bearing; 21, first end; 22, second end;
[0078] 31, first buckle; 32, second buckle. DETAILED DESCRIPTION
[0079] The utility model will be further described in connection with specific embodiments, but the protection scope of the utility model is not limited to this.
[0080] Examples
[0081] Figure 2 It is the perspective view of the foldable tray in the unfolded state of the embodiment of the utility model. Figure 3 It is the front view of the foldable tray in the unfolded state of the embodiment of the utility model, wherein the first buckle and the second buckle are ignored. Figure 4 It is the plan view of the foldable tray in the long side butt joint state of the utility model. Figure 5 It is the plan view of the foldable tray in the short side butt joint state of the utility model. Figure 6 It is the perspective view of the first buckle and the second buckle. Figure 7 It is the structure schematic view of the universal bearing. Figure 8It is the local schematic view of the foldable tray of the embodiment of the utility model.
[0082] Reference Figures 2 to 8 The embodiment of the utility model provides a foldable tray, include: first wood plastic board, second wood plastic board, universal bearing, a plurality of first buckle and a plurality of second buckle.
[0083] First wood plastic board and second wood plastic board are long rectangle board and equal side length.
[0084] First wood plastic board and second wood plastic board are equal strength thin shell component.Wood plastic board is also called wood plastic moulding board.In this embodiment, the overall thickness d1 of wood plastic board is 15mm, the overall height d2 of tray is 120mm, and the foldable tray can be forked by forklift in unfolded state.
[0085] A plurality of grooves are arranged on the first side surface of the first wood plastic board, and a plurality of convex structures are arranged on the second side surface of the first wood plastic board, the grooves and the convex structures on the first wood plastic board correspond one by one and are integrally formed by moulding.
[0086] A plurality of grooves are arranged on the first side surface of the second wood plastic board, and a plurality of convex structures are arranged on the second side surface of the second wood plastic board, the grooves and the convex structures on the second wood plastic board correspond one by one and are integrally formed by moulding.
[0087] The universal bearing is connected with one corner of each of the first wood plastic board and the second wood plastic board, so that the first wood plastic board and the second wood plastic board can be switched between the following three states:
[0088] The first state, the first side surface of the second wood plastic board covers the first side surface of the first wood plastic board, and the boundaries of the two are flush;
[0089] The second state, the long side of the first wood plastic board is butt jointed with the long side of the second wood plastic board, and the first side surface of the first wood plastic board is flush with the first side surface of the second wood plastic board;
[0090] The third state, the short side of the first wood plastic board is butt jointed with the short side of the second wood plastic board, and the first side surface of the first wood plastic board is flush with the first side surface of the second wood plastic board.
[0091] Figure 4 The state shown is the second state, Figure 5 The state shown is the third state.
[0092] A plurality of first buckles are arranged on two edges of the first wood plastic board connected by the corner where the universal bearing is arranged, and a plurality of second buckles are arranged on two edges of the second wood plastic board connected by the corner where the universal bearing is arranged.
[0093] In the embodiment, two first buckles are arranged on each edge of the first wood-plastic plate connected with the corner where the universal bearing is located. Two second buckles are arranged on each edge of the second wood-plastic plate connected with the corner where the universal bearing is located.
[0094] The first buckles on the long edges of the first wood-plastic plate and the second buckles on the long edges of the second wood-plastic plate are arranged one by one and can be in a separable fixed connection state.
[0095] The first buckles on the short edges of the first wood-plastic plate and the second buckles on the short edges of the second wood-plastic plate are arranged one by one and can be in a separable fixed connection state.
[0096] Reference Figure 6 The first buckles and the second buckles are H-shaped buckles.
[0097] The H-shaped buckle has two symmetrical buckle arms and two symmetrical buckle holes. The two buckle arms and the two buckle holes are in a flat plate shape and are arranged in parallel. The two buckle holes are opposite to each other and are fixed on a first side of a connecting plate. The two buckle arms are opposite to each other and are fixed on a second side of the connecting plate. The distance between the two surfaces of the two buckle arms away from each other is slightly greater than the distance between the two surfaces of the two buckle holes close to each other. A through hole is formed in the middle of the buckle hole, so that the buckle hole is easy to deform.
[0098] The buckle arm can be deformed under the action of a certain strength of force. The deformed buckle arm passes through the buckle hole through the path shown in Figure 6 to achieve the effect of clamping. After the buckle is clamped, a certain strength of force is needed to make it deform before it can be detached and separated, which can ensure the tightness of the connection between the first wood-plastic plate and the second wood-plastic plate. Each buckle and the corresponding wood-plastic plate are connected by screws and nuts.
[0099] The plurality of grooves on the first side surface of the first wood-plastic plate includes a plurality of triangular first reinforcing grooves, a plurality of circular second reinforcing grooves, and a plurality of curved third reinforcing grooves.
[0100] The plurality of protruding structures on the second side surface of the first wood-plastic plate includes a plurality of triangular first support columns, a plurality of circular second support columns, and a plurality of curved reinforcing ribs.
[0101] The groove depth of the first reinforcing groove and the second reinforcing groove is equal and greater than the groove depth of the third reinforcing groove.
[0102] The height of the first support column and the second support column is equal and greater than the height of the reinforcing rib.
[0103] The end portions of the third reinforcing grooves are connected to the second reinforcing grooves, and the end portions of the reinforcing ribs are connected to the second support columns.
[0104] The center connecting line of the first reinforcing groove surrounds the second reinforcing groove and the third reinforcing groove.
[0105] The center line of the first support column surrounds the second support column and the reinforcing rib.
[0106] The multiple grooves on the first side surface of the second wood-plastic composite board include: multiple triangular first reinforcing grooves, multiple circular second reinforcing grooves, and multiple curved third reinforcing grooves.
[0107] The second side surface of the second wood-plastic composite board has multiple raised structures including multiple triangular first support columns, multiple circular second support columns, and multiple curved reinforcing ribs.
[0108] The first and second reinforcing grooves have the same depth and are greater than the depth of the third reinforcing groove.
[0109] The heights of the first and second support columns are equal and greater than the height of the reinforcing ribs.
[0110] The ends of the third reinforcing groove are all connected to the second reinforcing groove, and the ends of the reinforcing ribs are all connected to the second support column.
[0111] The center line of the first reinforcing groove surrounds the second and third reinforcing grooves.
[0112] The center line of the first support column surrounds the second support column and the reinforcing rib.
[0113] The first support column is a triangular prism, and the second support column is a cylinder. Both serve to support the first or second wood-plastic composite board.
[0114] The purpose of the reinforcing ribs is to ensure that the first or second wood-plastic composite board is subjected to uniform stress, thereby extending its service life.
[0115] The second reinforcing grooves are distributed in a rectangular array, and the number of second reinforcing grooves arranged along the long side of the wood-plastic composite board is greater than the number of second reinforcing grooves arranged along the short side of the wood-plastic composite board.
[0116] The second support columns are arranged in a rectangular array, with the number of second support columns arranged along the long side of the wood-plastic composite board being greater than the number of second support columns arranged along the short side of the wood-plastic composite board.
[0117] Specifically, the second reinforcing grooves (second support columns) are arranged in two rows along the long side of the wood-plastic composite board, with three second reinforcing grooves (second support columns) in each row.
[0118] Specifically, the second reinforcing grooves (second support columns) are arranged in three rows along the short side of the wood-plastic composite board, with two second reinforcing grooves (second support columns) in each row.
[0119] Two third reinforcing grooves are connected between any two second reinforcing grooves adjacent in the row or column direction, one of the third reinforcing grooves is located outside the center line of the corresponding two second reinforcing grooves, and the other third reinforcing groove is located inside the center line of the corresponding two second reinforcing grooves, and the two third reinforcing grooves are convex in the direction away from the center line of the corresponding two second reinforcing grooves.
[0120] Two reinforcing ribs are connected between any two second supporting columns adjacent in the row or column direction, one of the reinforcing ribs is located outside the center line of the corresponding two second supporting columns, and the other reinforcing rib is located inside the center line of the corresponding two second supporting columns, and the two reinforcing ribs are convex in the direction away from the center line of the corresponding two second supporting columns.
[0121] The shape of the first reinforcing groove is an isosceles triangle, and the top angle of the isosceles triangle is perpendicular to the edge of the wood-plastic plate closest to the top angle.
[0122] The shape of the first supporting column is an isosceles triangle, and the top angle of the isosceles triangle is perpendicular to the edge of the wood-plastic plate closest to the top angle.
[0123] Specifically, the isosceles triangle is an equilateral triangle.
[0124] The number of first reinforcing grooves with a top angle pointing to any one short edge is two.
[0125] The number of first reinforcing grooves with a top angle pointing to any one long edge is one.
[0126] The number of first supporting columns with a top angle pointing to any one short edge is two.
[0127] The number of first supporting columns with a top angle pointing to any one long edge is one.
[0128] In the first state, the first wood-plastic plate is mirror-symmetric to the second wood-plastic plate.
[0129] The length of the first reinforcing groove is 60mm, and the distance from the edge of the wood-plastic plate is 70-80mm (allowing an error of ±5mm). The first supporting column is hollow and the bottom is closed, and the top is communicated with the first reinforcing groove.
[0130] Six second supporting columns are arranged on the single wood-plastic plate, and mainly play a role of supporting the wood-plastic plate. The second supporting column is a hollow cylindrical structure, the bottom is closed, and the top is communicated with the second reinforcing groove. The radius of the second reinforcing groove at the corner position is 100mm, and the distance from the center to the long and short sides is 355mm and 200m respectively (an error range of ±5mm is allowed), and the second supporting column below the second reinforcing groove mainly plays a role of expanding the bearing area and dispersing the weight. The single wood-plastic plate is provided with six second supporting columns, the bottom of the second supporting seat is directly contacted with the ground, also plays a role of supporting the wood-plastic plate, enhances the stability of the wood-plastic plate, and makes the wood-plastic plate not easy to deform.
[0131] The third reinforcing groove is an arc-shaped groove with a width of 10mm and a depth of 10mm, and the single wood-plastic plate is provided with 14 third reinforcing grooves. The third reinforcing groove is connected with the second reinforcing groove to ensure the strength and manufacturing precision of the product, and keep the strength and rigidity constant, so that the surface of the tray is uniformly stressed in the horizontal and vertical directions.
[0132] The bottom of the reinforcing rib is in a convex style, and the reinforcing rib appears as a third reinforcing groove in a shallow slot form from the surface. The reinforcing rib and the second supporting column are both designed to ensure the bearing capacity of the molded tray, so that the tray is not easy to be twisted and warped.
[0133] A nut is embedded at the position where the first wood-plastic plate and the second wood-plastic plate are connected with the universal bearing, threaded holes are formed on the outer circumferential surfaces of the two ends of the universal bearing, and the universal bearing is fixed by screws penetrating through the nut and the threaded holes.
[0134] Referring to Figure 7 and Figure 8 , the universal bearing enables the first wood-plastic plate and the second wood-plastic plate to rotate in any direction, realizes rapid folding and unfolding of the tray, changes the shape of the tray according to the version, and folds itself to save space. The first end and the second end of the universal bearing are connected with the corresponding wood-plastic plate through a screw nut. When the first wood-plastic plate and the second wood-plastic plate are molded, the nut is embedded at the corresponding position before molding, which can avoid damage to the hardness of the tray caused by drilling in the later period. In addition, the rotation of the universal bearing requires a certain space condition, so a slot matching the length and width of the universal bearing is polished at the position where the universal bearing is placed, so that the universal bearing can normally play a role.
[0135] The universal bearing can be a commercially available element. For example, the WXD single / double universal joint shaft coupling precision telescopic cross pin bearing type coupling of Dongguan Dingjian Precision Transmission Machinery Co., Ltd. can be selected.
[0136] The utility model is not limited to the above-mentioned embodiment, any deformation, improvement, replacement that the person skilled in the art can think of without departing from the essential content of the utility model falls into the range of the utility model.
Claims
1. A foldable pallet, characterized in that, The foldable tray comprises: a first wood-plastic plate, a second wood-plastic plate, a universal bearing, a plurality of first buckles, and a plurality of second buckles; the first wood-plastic plate and the second wood-plastic plate are both rectangular plates with equal side lengths; a plurality of grooves are arranged on a first side surface of the first wood-plastic plate, and a plurality of protruding structures are arranged on a second side surface of the first wood-plastic plate, the grooves and the protruding structures on the first wood-plastic plate correspond to each other and are integrally formed by die pressing; a plurality of grooves are arranged on a first side surface of the second wood-plastic plate, and a plurality of protruding structures are arranged on a second side surface of the second wood-plastic plate, the grooves and the protruding structures on the second wood-plastic plate correspond to each other and are integrally formed by die pressing; the universal bearing connects one corner of each of the first wood-plastic plate and the second wood-plastic plate, so that the first wood-plastic plate and the second wood-plastic plate can be switched between the following three states: a first state, in which the first side surface of the second wood-plastic plate covers the first side surface of the first wood-plastic plate, and the boundaries of the two are flush; a second state, in which the long side of the first wood-plastic plate is connected to the long side of the second wood-plastic plate, and the first side surface of the first wood-plastic plate is flush with the first side surface of the second wood-plastic plate; a third state, in which the short side of the first wood-plastic plate is connected to the short side of the second wood-plastic plate, and the first side surface of the first wood-plastic plate is flush with the first side surface of the second wood-plastic plate; the plurality of first buckles are arranged on two edges of the first wood-plastic plate connected by the corner where the universal bearing is located; the plurality of second buckles are arranged on two edges of the second wood-plastic plate connected by the corner where the universal bearing is located; the first buckles on the long side of the first wood-plastic plate and the second buckles on the long side of the second wood-plastic plate are arranged one-to-one and can be in a separable fixed connection state; the first buckles on the short side of the first wood-plastic plate and the second buckles on the short side of the second wood-plastic plate are arranged one-to-one and can be in a separable fixed connection state.
2. The foldable tray according to claim 1, wherein the plurality of grooves on the first side surface of the first wood-plastic plate comprise a plurality of triangular first reinforcing grooves, a plurality of circular second reinforcing grooves, and a plurality of curved third reinforcing grooves; the plurality of protruding structures on the second side surface of the first wood-plastic plate comprise a plurality of triangular first support columns, a plurality of circular second support columns, and a plurality of curved reinforcing ribs; the groove depths of the first reinforcing grooves and the second reinforcing grooves are equal and greater than the groove depth of the third reinforcing grooves; the heights of the first support columns and the second support columns are equal and greater than the height of the reinforcing ribs; the ends of the third reinforcing grooves are all connected to the second reinforcing grooves, and the ends of the reinforcing ribs are all connected to the second support columns; the center line of the first reinforcing grooves encloses the second reinforcing grooves and the third reinforcing grooves; the center line of the first support columns encloses the second support columns and the reinforcing ribs.
3. The foldable tray according to claim 1, wherein The plurality of grooves on the first side surface of the second wood-plastic plate comprises a plurality of triangular first reinforcing grooves, a plurality of circular second reinforcing grooves, and a plurality of curved third reinforcing grooves; The plurality of protruding structures on the second side surface of the second wood-plastic plate comprises a plurality of triangular first support columns, a plurality of circular second support columns, and a plurality of curved reinforcing ribs; The groove depths of the first reinforcing grooves and the second reinforcing grooves are equal and greater than the groove depth of the third reinforcing grooves; The heights of the first support columns and the second support columns are equal and greater than the height of the reinforcing ribs; The ends of the third reinforcing grooves are all connected to the second reinforcing grooves, and the ends of the reinforcing ribs are all connected to the second support columns; The center line of the first reinforcing grooves encloses the second reinforcing grooves and the third reinforcing grooves; The center line of the first support columns encloses the second support columns and the reinforcing ribs.
4. The foldable tray according to claim 2 or 3, wherein The second reinforcing grooves are arranged in a rectangular array, and the number of second reinforcing grooves arranged along the long side direction of the wood-plastic plate is greater than the number of second reinforcing grooves arranged along the short side direction of the wood-plastic plate; The second support columns are arranged in a rectangular array, and the number of second support columns arranged along the long side direction of the wood-plastic plate is greater than the number of second support columns arranged along the short side direction of the wood-plastic plate.
5. The foldable tray according to claim 4, wherein Between any two second reinforcing grooves adjacent in the row or column direction, two third reinforcing grooves are connected, one of which is located outside the center line of the corresponding two second reinforcing grooves, and the other is located inside the center line of the corresponding two second reinforcing grooves, and both of the two third reinforcing grooves protrude away from the center line of the corresponding two second reinforcing grooves; Between any two second support columns adjacent in the row or column direction, two reinforcing ribs are connected, one of which is located outside the center line of the corresponding two second support columns, and the other is located inside the center line of the corresponding two second support columns, and both of the two reinforcing ribs protrude away from the center line of the corresponding two second support columns.
6. The foldable tray according to claim 4, wherein The shape of the first reinforcing groove is an isosceles triangle, and the top angle of the isosceles triangle points vertically to the side of the wood-plastic plate closest to the top angle; The shape of the first support column is an isosceles triangle, and the top angle of the isosceles triangle points vertically to the side of the wood-plastic plate closest to the top angle.
7. The foldable tray according to claim 6, wherein The number of first reinforcing grooves with a top angle pointing to any one of the short sides is at least two; The number of first reinforcing grooves with a top angle pointing to any one of the long sides is at least one; The number of first support columns with a top angle pointing to any one of the short sides is at least two; The number of first support columns with a top angle pointing to any one of the long sides is at least one.
8. The foldable tray according to claim 1, wherein In the first state, the first wood-plastic plate is mirror-symmetric to the second wood-plastic plate.
9. The foldable pallet of claim 1, wherein, The first buckle and the second buckle are H-shaped buckles.
10. The foldable pallet of claim 1, wherein, The first wood-plastic plate and the second wood-plastic plate are each embedded with a nut at a position connected with the universal bearing, and a threaded hole is formed on an outer circumferential surface of both ends of the universal bearing, and the universal bearing is fixed by a screw passing through the nut and the threaded hole.