A distance-adjustable turnover box

Abstract

The present application belongs to the technical field of oil rail storage, in particular to a spacing adjustment type turnover box, which comprises a box body, a box cover, a jump prevention plate, a supporting bottom plate, an extrusion block and a trapezoidal block, wherein the bottom of the box cover is matched with the top of the box body for plug-in connection, the bottom of the supporting bottom plate is matched with the top of the jump prevention plate for plug-in connection, the extrusion block is matched with the trapezoidal block, and the bottom of the supporting bottom plate is matched with the jump prevention plate for plug-in connection. When the oil rail is placed, the positions of the two mounting seats need to be adjusted according to the positions of the ears at the bottom of the oil rail. The middle line positions of the positioning holes at the bottom of the mounting seat and the bottom through holes are aligned, the limiting column is inserted into the positioning hole, the rotating block is rotated, the rotating block drives the fastening bolt to rotate, the fastening bolt drives the extrusion block to move, the extrusion block extrudes the trapezoidal block on the side wall during downward movement, the trapezoidal block moves outward at the same time, the trapezoidal block drives the limiting rod to move, at this time, the first spring is compressed, the limiting rod moves to the bottom of the supporting bottom plate, and the mounting seat is installed on the supporting bottom plate. The present application can realize rapid adjustment of different positions and fixing function of different sizes and structures of oil rails.

Description

Technical Field

[0001] This invention belongs to the field of oil rail storage technology, specifically a spacing-adjustable turnover box. Background Technology

[0002] The fuel rail, also known as the fuel guide rail or high-pressure accumulator, is the fuel line in front of the injectors that supply fuel to the cylinders of an internal combustion engine. It includes a fuel inlet and a housing that connects to multiple injectors. Some fuel rails have a fuel pressure regulator at one end. Fuel rail transportation is generally carried out by road, using box trucks or containers. A well-designed and structurally sound fuel rail transport system is used for transfer between warehouses and vehicles, and is an important link in ensuring transportation efficiency and safety.

[0003] A Chinese patent with publication number CN218464268U discloses a turnover box structure for bulk transportation of oil rails, including an EPP cover and an EPP bottom that overlap each other. The top surface of the EPP bottom inside the EPP cover is covered with a blister liner whose bottom shape matches the top shape of the EPP bottom and whose top shape matches the top shape of the EPP bottom. The bottom shape of the EPP bottom is the same as the bottom shape of the EPP cover. In use, a layer of blister liner is placed inside each layer of EPP bottom, and then an oil rail is placed inside each layer of EPP bottom. Multiple layers of EPP bottoms with oil rails are stacked according to the required quantity. An EPP cover and an EPP cover are then placed on the top layer of EPP bottom. The whole assembly is then placed on a transfer trolley and secured for transport to a transport vehicle. When used repeatedly, if the blister liner is contaminated with oil, it can be replaced directly without cleaning. This allows for bulk transportation and turnover of oil rails, improving transportation efficiency, and effectively positioning the oil rails to ensure pressure resistance and prevent damage to the oil rails.

[0004] In the above technology, an oil rail placement groove is used to place the oil rail. However, the specifications of the oil rail placement groove are fixed, so it is suitable for oil rails of fixed size or structure. When the size or structure of the oil rail changes, the position of the bottom ears of oil rails with different spacings will be different. This fixed spacing turnover box may not be able to effectively fix and support the oil rail, causing the oil rail to shift or be damaged during transportation or storage.

[0005] Therefore, the present invention provides a spacing-adjustable turnover box. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is: a spacing adjustable turnover box as described in this invention, comprising:

[0008] Box;

[0009] The lid of the box is fitted into the top of the box body at its bottom.

[0010] An anti-jump board is fixed to the bottom of the box cover and fits against the inner wall of the box.

[0011] A supporting base plate is provided inside the bottom end of the box body, and multiple through holes are linearly arranged on the supporting base plate;

[0012] The limiting mechanism is located on the supporting base plate;

[0013] The limiting mechanism includes a mounting base, and multiple mounting bases are provided, with two mounting bases forming a group. Each mounting base has a positioning hole at both ends, which mates with a through hole. A pin is inserted into each positioning hole. Each pin is rotatably connected to a fastening bolt via a bearing. A rotating block is fixed to the top of each fastening bolt, and a pressing block is threaded onto the outer wall of each fastening bolt. Four limiting rods are slidably connected to the bottom of each pin. A trapezoidal block is fixed to one end of each sliding rod, and the trapezoidal block mates with the pressing block. The top of each limiting rod is flush with the bottom of the supporting base plate.

[0014] One of the mounting bases on one side is equipped with a first limiting block, and the other mounting bases are equipped with a second limiting block. The tops of the first limiting block and the second limiting block together support the oil rail.

[0015] Preferably, each of the inserts has a movable cavity; four sliding pillars are fixedly connected to the inner wall of the bottom end of each movable cavity; each trapezoidal block slides within an adjacent sliding pillar; a first spring is sleeved on the outer side of each sliding pillar; the two ends of the first spring are respectively fixed to the trapezoidal block and the inner wall of the movable cavity.

[0016] Preferably, the extrusion blocks slide on the inner wall of the movable cavity, and the extrusion blocks are all configured as truncated pyramids, with all four faces of the extrusion blocks fitting against the inclined surfaces of the adjacent trapezoidal blocks.

[0017] Preferably, anti-slip pads are attached to the inner walls of both the first limiting block and the second limiting block, and the anti-slip pads are both made of rubber.

[0018] Preferably, each mounting base has a movable groove; each movable groove is rotatably connected to a bidirectional ball screw via a bearing; one end of each bidirectional ball screw extends outside the mounting base and is fixedly connected to a handle; two movable blocks are threadedly connected to the outer side of each bidirectional ball screw, and a second connecting block is fixedly connected to the top of each movable block; a connecting rod is rotatably connected to each second connecting block via a pin; the end of each connecting rod away from the second connecting block is rotatably connected to a first connecting block via a pin; the top of the first connecting block is fixedly connected to a first limiting block and a second limiting block, respectively.

[0019] Preferably, two guide rods are fixedly connected to the inner wall of each movable groove; each movable block is slidably connected to the guide rods.

[0020] Preferably, a support frame is fixed to the inner wall of the box, and the support base plate is placed on the support frame.

[0021] Preferably, a sliding groove is provided on each of the two opposite side walls of the box body; a semi-cylinder is slidably connected in each sliding groove, and one end of each of the two semi-cylinders is fixedly connected to one end of four second springs, and the other end of each of the second springs is fixedly connected to the inner wall of the sliding groove.

[0022] Preferably, the outer side walls of the box are all fixed with reinforcing ribs, the reinforcing ribs include horizontal reinforcing ribs and vertical reinforcing ribs, the horizontal reinforcing ribs and vertical reinforcing ribs are arranged in a cross pattern, and two handle holes are formed between the reinforcing ribs and the box.

[0023] Preferably, the bottom inner wall of the box is fixed with a fixing strip, and an EPP liner is placed on the fixing strip. The fixing strip is designed as an X-shaped, grid-shaped or cross-shaped structure.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The present invention provides a spacing-adjustable turnover box, which uses a pressing block and a trapezoidal block in cooperation. When placing the oil rail, the positions of the two mounting seats need to be adjusted according to the position of the bottom ears of the oil rail. By aligning the positioning hole at the bottom of the mounting seat with the center line of the bottom through hole, the limiting post is inserted into the positioning hole. By rotating the rotating block, the rotating block drives the fastening bolt to rotate, and the fastening bolt drives the pressing block to move. During the downward movement of the pressing block, it presses the trapezoidal block on the side wall. At the same time, the trapezoidal block moves outward, and the trapezoidal block drives the limiting rod to move. At this time, the first spring is compressed, and the limiting rod moves to the bottom of the support base plate, installing the mounting seat on the support base plate. When disassembly is required, the rotating block is rotated in the opposite direction, and the limiting rod retracts into the inside of the insertion post, so that the mounting seat can be removed from the support base plate. This enables rapid adjustment to different positions and provides a fixing function for oil rails of different sizes and structures.

[0026] 2. The adjustable spacing turnover box of the present invention, through the cooperation of the first connecting block, the second connecting block and the connecting rod, addresses the issue that due to the different structures and dimensions of the oil rails, when the distance between the oil rail and the anti-skid plate is large, the oil rail may shift or shake, failing to provide a fixing function; by rotating the handle, the double-direction ball screw is driven to rotate. Since a ball nut seat is provided at the connection between the double-direction ball screw and the moving block, ensuring the radial movement of the moving block, the double-direction ball screw drives the moving block to move in the opposite direction, and the moving block drives the second connecting rod. The connecting block moves in the opposite direction, and the second connecting block drives the bottom end of the connecting rod to move through the pin. At the same time, the top end of the connecting rod rotates around the pin. When the top end of the connecting rod rotates, the height of the first connecting block changes, thereby realizing the height change of the first limit block and the second limit block through the first connecting block. When the distance between the oil rail and the anti-jump plate is about 5mm, the adjustment stops. When stacking, the box cover and anti-jump plate are usually not placed. Instead, another box is placed on top of the box. At this time, the distance between the oil rail and the bottom of the upper box is also about 5mm. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a perspective view of the present invention;

[0029] Figure 2 This is an exploded view of the present invention;

[0030] Figure 3 This is a partial view of the interior of the box in this invention;

[0031] Figure 4 This is a structural schematic diagram of the cross-section of the box in this invention;

[0032] Figure 5 This is an enlarged structural schematic diagram of point A in this invention;

[0033] Figure 6 This is a schematic diagram of the insert post structure in this invention;

[0034] Figure 7 This is a schematic diagram of the structure of the extrusion block and the trapezoidal block in this invention;

[0035] Figure 8 This is a schematic diagram of the structure of the first limiting block in this invention;

[0036] Figure 9 This is a schematic diagram of the mounting base in this invention;

[0037] Figure 10 This is a schematic diagram of the bidirectional ball screw in this invention;

[0038] Figure 11 This is an enlarged structural diagram of point B in this invention;

[0039] In the diagram: 1. Box body; 11. Box cover; 12. Anti-skid plate; 13. Reinforcing rib; 14. Fixing strip; 2. Support base plate; 21. Through hole; 3. Mounting base; 31. First limiting block; 32. Second limiting block; 33. Insert post; 34. Rotating block; 35. Fastening bolt; 36. Extrusion block; 37. Trapezoidal block; 38. Limiting rod; 39. Sliding column; 310. First spring; 311. Movable cavity; 4. Movable groove; 41. First connecting block; 42. Connecting rod; 43. Second connecting block; 44. Moving block; 45. Bidirectional ball screw; 46. Guide rod; 47. Handle; 5. Receiving frame; 51. Semi-cylinder; 52. Sliding groove; 53. Second spring. Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0041] like Figures 1 to 9 As shown in the embodiment of the present invention, an adjustable spacing turnover box includes: a box body 1; a box cover 11, the bottom of which is inserted into the top of the box body 1; an anti-jumping plate 12, which is fixed to the bottom of the box cover 11 and fits against the inner wall of the box body 1; a supporting base plate 2, which is disposed inside the bottom end of the box body 1, and has a plurality of through holes 21 arranged linearly on the supporting base plate 2; a limiting mechanism disposed on the supporting base plate 2; the limiting mechanism includes a mounting base 3, and a plurality of mounting bases 3 are provided, wherein two mounting bases 3 are configured as a group; both ends of the mounting base 3 are provided with positioning holes, and the positioning holes are all engaged with the through holes 21; and each positioning hole is inserted into the positioning hole. The system includes insert posts 33; each insert post 33 is rotatably connected to a fastening bolt 35 via bearings; each fastening bolt 35 has a rotating block 34 fixed to its top; each fastening bolt 35 has a pressing block 36 threadedly connected to its outer side wall; each insert post 33 has four limiting rods 38 slidably connected to its bottom end; each sliding rod has a trapezoidal block 37 fixed to one end, which respectively cooperates with the pressing block 36; the top of each limiting rod 38 is flush with the bottom of the support base plate 2; a first limiting block 31 is installed on one side of each mounting base 3, and a second limiting block 32 is installed on the remaining mounting bases 3; the tops of the first limiting block 31 and the second limiting block 32 together support the oil rail.

[0042] In the existing technology, oil rail placement grooves are used to place oil rails. However, the specifications of the oil rail placement grooves are fixed, so they are suitable for oil rails of fixed size or structure. When the size or structure of the oil rail changes, the position of the bottom ears of oil rails with different spacings will be different. Such fixed-spacing turnover boxes may not be able to effectively fix and support the oil rails, causing the oil rails to shift or be damaged during transportation or storage.

[0043] When using the limiting mechanism provided by the present invention, when placing the oil rail, it is necessary to adjust the position of the two mounting seats 3 according to the position of the bottom ears of the oil rail. By aligning the positioning hole at the bottom of the mounting seat 3 with the center line of the bottom through hole 21, the limiting post is inserted into the positioning hole. By rotating the rotating block 34, the rotating block 34 drives the fastening bolt 35 to rotate. The fastening bolt 35 drives the pressing block 36 to move. During the downward movement of the pressing block 36, it presses the trapezoidal block 37 on the side wall. At the same time, the trapezoidal block 37 moves outward. The trapezoidal block 37 drives the limiting rod 38 to move. At this time, the first spring 310 is compressed, and the limiting rod 38 moves to the bottom of the support base plate 2, and the mounting seat 3 is installed on the support base plate 2.

[0044] When disassembly is required, the rotating block 34 is rotated in the opposite direction. The rotating block 34 drives the fastening bolt 35 to rotate in the opposite direction. The fastening bolt 35 drives the pressing block 36 to move. During the upward movement of the pressing block 36, the pressing block 36 releases the pressure on the trapezoidal block 37 on the side wall. At this time, under the action of the first spring 310, the trapezoidal block 37 moves inward at the same time. The trapezoidal block 37 drives the limiting rod 38 to move inward. The limiting rod 38 retracts into the interior of the insert 33, so that the mounting base 3 can be removed from the support base plate 2. This enables quick adjustment to different positions and realizes the function of fixing oil rails of different sizes and structures.

[0045] like Figure 5 As shown, each of the inserts 33 has a movable cavity 311; four sliding pillars 39 are fixedly connected to the inner wall of the bottom end of each movable cavity 311; each trapezoidal block 37 slides within an adjacent sliding pillar 39; a first spring 310 is sleeved on the outer side of each sliding pillar 39; the two ends of the first spring 310 are respectively fixed to the inner wall of the trapezoidal block 37 and the movable cavity 311.

[0046] The first spring 310 provided by the present invention facilitates the quick reset of the trapezoidal block 37 during use. During installation, the pressure of the trapezoidal block 37 compresses the first spring 310. When disassembly is required, contact with the pressure on the trapezoidal block 37 allows the first spring 310 to quickly reset due to its good elasticity, thereby quickly releasing the fixation of the mounting base 3.

[0047] like Figure 7As shown, the extrusion blocks 36 slide on the inner wall of the movable cavity 311. The extrusion blocks 36 are all configured as quadrangular frustums, and the four faces of the extrusion blocks 36 are in contact with the inclined surfaces of the adjacent trapezoidal blocks 37.

[0048] When in use, the extrusion block 36 provided by the present invention is set into the shape of a truncated quadrangular prism, which makes it easy for the four sides of the extrusion block 36 to fit with the inclined surface of the adjacent trapezoidal block 37, so as to realize the function of rapid contraction or expansion during movement.

[0049] like Figure 3 As shown, anti-slip pads are attached to the inner walls of the first limiting block 31 and the second limiting block 32, and the anti-slip pads are made of rubber.

[0050] The anti-slip mat provided by the present invention, when in use, prevents direct contact between the anti-slip mat and the inner walls of the first limiting block 31 and the second limiting block 32, thereby preventing damage to the outer wall of the oil rail during transportation.

[0051] like Figure 9 and Figure 10 As shown, each of the mounting bases 3 has a movable groove 4; each of the movable grooves 4 is rotatably connected to a bidirectional ball screw 45 via a bearing; one end of each bidirectional ball screw 45 extends outside the mounting base 3 and is fixedly connected to a handle 47; two moving blocks 44 are threadedly connected to the outer side of each bidirectional ball screw 45, and a second connecting block 43 is fixedly connected to the top of each moving block 44; a connecting rod 42 is rotatably connected to each of the second connecting blocks 43 via a pin; the end of each connecting rod 42 away from the second connecting block 43 is rotatably connected to a first connecting block 41 via a pin; the top of the first connecting block 41 is fixedly connected to a first limiting block 31 and a second limiting block 32 respectively.

[0052] When the first connecting block 41, the second connecting block 43, and the connecting rod 42 provided by this invention are in use, due to the different structures and dimensions of the oil rails, when the distance between the oil rail and the anti-skid plate 12 is large, the oil rail may shift or shake, failing to provide a fixing function. By rotating the handle 47, the bidirectional ball screw 45 is rotated. Since a ball nut seat is provided at the connection between the bidirectional ball screw 45 and the moving block 44, the radial movement of the moving block 44 is ensured by the ball nut seat. Therefore, the bidirectional ball screw 45 drives the moving block 44 to move in the opposite direction, and the moving block 44 drives the second connecting block 43 to move in the opposite direction. The second connecting block 43 drives the bottom end of the connecting rod 42 to move through the pin shaft. At the same time, the top end of the connecting rod 42 rotates around the pin shaft. When the top end of the connecting rod 42 rotates, the height of the first connecting block 41 changes, thereby realizing the height change of the first limiting block 31 and the second limiting block 32 through the first connecting block 41. When the distance between the oil rail and the anti-jump plate 12 is about 5mm, the adjustment stops. When stacking, the box cover 11 and the anti-jump plate 12 are usually not placed. Instead, another box 1 is placed on top of the box 1. At this time, the distance between the oil rail and the bottom of the upper box 1 is also about 5mm.

[0053] like Figure 10 As shown, two guide rods 46 are fixedly connected to the inner wall of each movable groove 4; each movable block 44 is slidably connected to the guide rods 46.

[0054] When the guide rod 46 provided by the present invention is in use, the moving block 44 slides on the guide rod 46 during the movement process, and the guide rod 46 limits the moving block 44 in the horizontal direction.

[0055] like Figure 2 , Figure 3 and Figure 11 As shown, a support frame 5 is fixed to the inner wall of the box 1, and the support base plate 2 is placed on the support frame 5.

[0056] The receiving frame 5 provided by the present invention is used to place the supporting base plate 2 during use, so that the base plate can be removed and the bottom of the box 1 can be cleaned.

[0057] like Figure 11 As shown, each of the two opposite side walls of the housing 1 is provided with a sliding groove 52; a semi-cylinder 51 is slidably connected in each sliding groove 52, and one end of each of the two second springs 53 is fixedly connected to one end of each of the flat surfaces of the semi-cylinder 51, and the other end of each of the second springs 53 is fixedly connected to the inner wall of the sliding groove 52.

[0058] When the semi-cylinder 51 and the second spring 53 provided by this invention are used, they are placed on the support base plate 2. The support base plate 2 presses the semi-cylinder 51 into the slide groove 52, and the second spring 53 is compressed. The support base plate 2 is then placed. Under the action of the second spring 53, the semi-cylinder 51 is quickly reset, and the support base plate 2 is locked between the semi-cylinder 51 and the receiving frame 5. When it needs to be removed, the support base plate 2 can be lifted by using a thin rod through the through hole 21.

[0059] like Figures 1 to 2 As shown, the outer side walls of the box 1 are all fixed with reinforcing ribs 13. The reinforcing ribs 13 include horizontal reinforcing ribs and vertical reinforcing ribs. The horizontal reinforcing ribs and vertical reinforcing ribs are arranged in a cross pattern. Two handle holes are formed between the reinforcing ribs 13 and the box 1.

[0060] When in use, the reinforcing rib 13 provided by the present invention improves the toughness of the housing 1, making the housing 1 more robust and protecting the oil rail.

[0061] like Figures 1 to 2 As shown, the bottom inner wall of the box 1 is fixed with a fixing strip 14, and an EPP liner is placed on the fixing strip 14. The fixing strip 14 is designed as an X-shaped, grid-shaped or cross-shaped structure.

[0062] When in use, the fixing strip 14 provided by the present invention improves the toughness of the housing 1 by setting the fixing strip 14 with an X-shaped, grid-shaped or cross-shaped structure, and the EPP liner facilitates the absorption of oil seepage from the oil rail and makes cleaning easier.

[0063] Working principle: In the existing technology, oil rail placement grooves are used to place oil rails. However, the specifications of the oil rail placement grooves are fixed, so they are suitable for oil rails of fixed size or structure. When the size or structure of the oil rail changes, the position of the bottom ears of oil rails with different spacings will be different. This fixed spacing turnover box may not be able to effectively fix and support the oil rails, causing the oil rails to shift or be damaged during transportation or storage.

[0064] When using the limiting mechanism provided by the present invention, when placing the oil rail, it is necessary to adjust the position of the two mounting seats 3 according to the position of the bottom ears of the oil rail. By aligning the positioning hole at the bottom of the mounting seat 3 with the center line of the bottom through hole 21, the limiting post is inserted into the positioning hole. By rotating the rotating block 34, the rotating block 34 drives the fastening bolt 35 to rotate. The fastening bolt 35 drives the pressing block 36 to move. During the downward movement of the pressing block 36, it presses the trapezoidal block 37 on the side wall. At the same time, the trapezoidal block 37 moves outward. The trapezoidal block 37 drives the limiting rod 38 to move. At this time, the first spring 310 is compressed, and the limiting rod 38 moves to the bottom of the support base plate 2, and the mounting seat 3 is installed on the support base plate 2.

[0065] When disassembly is required, the rotating block 34 is rotated in the opposite direction. The rotating block 34 drives the fastening bolt 35 to rotate in the opposite direction. The fastening bolt 35 drives the pressing block 36 to move. During the upward movement of the pressing block 36, the pressing block 36 releases the pressure on the trapezoidal block 37 on the side wall. At this time, under the action of the first spring 310, the trapezoidal block 37 moves inward at the same time. The trapezoidal block 37 drives the limiting rod 38 to move inward. The limiting rod 38 retracts into the interior of the insert 33, so the mounting base 3 can be removed from the support base plate 2. This enables quick adjustment to different positions and provides the function of fixing oil rails of different sizes and structures.

[0066] When the first connecting block 41, the second connecting block 43, and the connecting rod 42 provided by this invention are in use, due to the different structures and dimensions of the oil rails, when the distance between the oil rail and the anti-skid plate 12 is large, the oil rail may shift or shake, failing to provide a fixing function. By rotating the handle 47, the bidirectional ball screw 45 is rotated. Since a ball nut seat is provided at the connection between the bidirectional ball screw 45 and the moving block 44, the radial movement of the moving block 44 is ensured by the ball nut seat. Therefore, the bidirectional ball screw 45 drives the moving block 44 to move in the opposite direction, and the moving block 44 drives the second connecting block 43 to move in the opposite direction. The second connecting block 43 drives the bottom end of the connecting rod 42 to move through the pin shaft. At the same time, the top end of the connecting rod 42 rotates around the pin shaft. When the top end of the connecting rod 42 rotates, the height of the first connecting block 41 changes, thereby realizing the height change of the first limiting block 31 and the second limiting block 32 through the first connecting block 41. When the distance between the oil rail and the anti-jump plate 12 is about 5mm, the adjustment stops. When stacking, the box cover 11 and the anti-jump plate 12 are usually not placed. Instead, another box 1 is placed on top of the box 1. At this time, the distance between the oil rail and the bottom of the upper box 1 is also about 5mm.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spacing-adjustable turnover box, comprising: Box (1); Box cover (11), the bottom of which is inserted into the top of the box body (1); Anti-jump board (12), the anti-jump board (12) is fixed to the bottom of the box cover (11) and fits against the inner wall of the box body (1); Support base plate (2), the support base plate (2) is set inside the bottom end of the box (1), and multiple through holes (21) are linearly arranged on the support base plate (2). The limiting mechanism is located on the supporting base plate (2); The limiting mechanism is characterized in that: the limiting mechanism includes a mounting base (3), and multiple mounting bases (3) are provided, wherein two mounting bases (3) are set as a group; both ends of the mounting base (3) are provided with positioning holes, and the positioning holes are all in cooperation with the through holes (21); a pin (33) is inserted into each positioning hole; a fastening bolt (35) is rotatably connected to each pin (33) through a bearing, and a rotating block (34) is fixedly connected to the top of each fastening bolt (35), and a pressing block (36) is threadedly connected to the outer side wall of each fastening bolt (35); four limiting rods (38) are slidably connected to the bottom end of each pin (33); a trapezoidal block (37) is fixedly connected to one end of each limiting rod (38), and the trapezoidal block (37) is respectively in cooperation with the pressing block (36), and the top of each limiting rod (38) is flush with the bottom of the supporting base plate (2); One of the mounting bases (3) on one side is equipped with a first limiting block (31), and the other mounting bases (3) are equipped with a second limiting block (32). The top of the first limiting block (31) and the second limiting block (32) are placed together on the oil rail. Each mounting base (3) has a movable groove (4); each movable groove (4) is rotatably connected to a bidirectional ball screw (45) via a bearing; one end of each bidirectional ball screw (45) extends outside the mounting base (3) and is fixedly connected to a handle (47); two movable blocks (44) are threadedly connected to the outer side of each bidirectional ball screw (45), and a second connecting block (43) is fixedly connected to the top of each movable block (44); a connecting rod (42) is rotatably connected to each second connecting block (43) via a pin; the end of the connecting rod (42) away from the second connecting block (43) is rotatably connected to a first connecting block (41) via a pin; the top of the first connecting block (41) is fixedly connected to the first limiting block (31) and the second limiting block (32) respectively.

2. The adjustable spacing turnover box according to claim 1, characterized in that: Each of the inserts (33) has a movable cavity (311); four sliding columns (39) are fixedly connected to the inner wall of the bottom end of each movable cavity (311); each trapezoidal block (37) slides in the adjacent sliding column (39); each sliding column (39) is fitted with a first spring (310); the two ends of the first spring (310) are fixedly connected to the inner wall of the trapezoidal block (37) and the movable cavity (311), respectively.

3. The adjustable spacing turnover box according to claim 2, characterized in that: The extrusion blocks (36) slide on the inner wall of the active cavity (311). The extrusion blocks (36) are all set as quadrangular frustums. The four sides of the extrusion blocks (36) are in contact with the inclined surfaces of the adjacent trapezoidal blocks (37).

4. The adjustable spacing turnover box according to claim 3, characterized in that: Anti-slip pads are attached to the inner walls of the first limiting block (31) and the second limiting block (32), and the anti-slip pads are made of rubber.

5. The adjustable spacing turnover box according to claim 4, characterized in that: Two guide rods (46) are fixedly connected to the inner wall of each of the movable grooves (4); each of the moving blocks (44) is slidably connected to the guide rods (46).

6. The adjustable spacing turnover box according to claim 5, characterized in that: A support frame (5) is fixed to the inner wall of the box (1), and the support base plate (2) is placed on the support frame (5).

7. The adjustable spacing turnover box according to claim 6, characterized in that: The box (1) has two opposite side walls with sliding grooves (52); a semi-cylinder (51) is slidably connected in the sliding groove (52), and one end of four second springs (53) is fixed to one end of the plane of the semi-cylinder (51), and the other end of the second springs (53) is fixed to the inner wall of the sliding groove (52).

8. The adjustable spacing turnover box according to claim 7, characterized in that: The outer side wall of the box (1) is fixed with reinforcing ribs (13). The reinforcing ribs (13) include horizontal reinforcing ribs and vertical reinforcing ribs. The horizontal reinforcing ribs and vertical reinforcing ribs are arranged in a cross pattern. Two handle holes are formed between the reinforcing ribs (13) and the box (1).

9. A spacing-adjustable turnover box according to claim 8, characterized in that: The bottom inner wall of the box (1) is fixed with a fixing strip (14), and an EPP liner is placed on the fixing strip (14). The fixing strip (14) is set as an X-shaped, grid-shaped or cross-shaped structure.

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