A self-stabilizing pallet

Abstract

The application provides a self-stabilizing turnover box, an inner shell is installed in an outer shell with a gap between the inner shell and the outer shell, a core shell is installed in the inner shell and can rotate around its axis; a plurality of magnets and flexible pads are arranged on the inner wall of the outer shell cover and the inner wall of the outer shell, magnets are also arranged on the corresponding positions of the outer wall of the core shell cover and the inner wall of the inner shell, and the magnets in the corresponding positions have the same magnetism; the outer shell and the outer shell cover are made of metal materials with thermal insulation interlayers, and the core shell is made of metal materials with vacuum interlayers; a thermal insulation barrel is used in the core shell to divide it into three layers, the barrel wall is provided with a plurality of through holes, ice plates are filled in the upper and lower layers, and blood products are placed in the middle layer; and a pull rod and a roller are installed on the outer side wall of the body. The application adopts a magnetic suspension structure, which can weaken the impact and vibration of the inner objects when the external motion.

Description

Technical Field

[0001] This invention belongs to the field of logistics and transportation, and specifically relates to the technology of refrigerated turnover boxes for blood transportation. Background Technology

[0002] Blood products inherently present three main problems: First, they are prone to sedimentation when left stagnant for extended periods; second, excessive shaking and impact during transport accelerates their deterioration; and third, they require refrigerated storage within a specific temperature range. Typically, refrigerated blood transport crates incorporate springs at the bottom to reduce vibration during transport. However, when the crate tilts or flips, the blood products inside also tilt or reverse along with it. Furthermore, spring-loaded refrigerated blood transport crates are ineffective at absorbing sudden impacts, and the spring force limits the weight of blood products that can be stored within. Thick springs are insufficient to compress a small amount of blood products for cushioning, while thin springs cannot support large quantities of blood products. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a self-stabilizing turnover box that adopts a magnetic levitation structure, which can reduce the impact and vibration on the contents during external movement.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a self-stabilizing turnover box, including a body, a pull rod and rollers.

[0005] The main body is a hollow cylindrical structure, including an outer shell, an inner shell, and a core shell. The inner shell is installed inside the outer shell, with a gap between them. The core shell is installed inside the inner shell and can rotate around its own axis within the inner shell. The outer shell is open at least one end and is provided with an outer shell cover, and the core shell is open at least one end and is provided with a core shell cover. Several magnets and flexible gaskets are provided on the inner wall of the outer shell cover and the inner wall of the outer shell. Magnets are also provided on the outer wall of the inner shell at positions corresponding to the magnets on the inner wall of the outer shell. The magnets at corresponding positions on the outer shell and the inner shell have the same magnetism. Magnets are also provided on the core shell cover at positions corresponding to the magnets on the inner wall of the outer shell cover. The magnets at corresponding positions on the outer shell cover and the core shell cover have the same magnetism. The outer shell and the outer shell cover are made of metal material with a heat-insulating layer, and the core shell is made of metal material with a vacuum layer. The core shell contains a heat-insulating barrel divided into three layers: upper, middle, and lower. Several through holes are opened in the wall of the heat-insulating barrel. Ice plates are filled in the upper and lower layers, and blood products are placed in the middle layer. The pull rod and roller are installed on the outer wall of the main body.

[0006] The outer shell is an octagonal prism, and the corresponding inner shell is also an octagonal prism; the rollers are installed on a certain wall surface of the outer side of the octagonal prism, and the two rollers are set at the axial ends of the wall surface. When the body is placed on a horizontal plane with the adjacent wall surface of the rollers, the projection of the rollers on the horizontal plane falls within the projection of the body.

[0007] The aforementioned pull rod is a folding pull rod.

[0008] An interlocking structure is provided on the outer wall of the main body for stable interconnection between two adjacent self-stabilizing turnover boxes when several self-stabilizing turnover boxes are stacked in a regular manner; the interlocking structure adopts hooks or Velcro.

[0009] The outer cover is connected to the outer shell via an embedded hinge, a sealing strip is provided between the outer cover and the outer shell, and an embedded lock is installed on the outer cover for connecting and locking the outer shell.

[0010] The outer shell and outer cover are both made of aluminum alloy, and the inner part is a polyurethane sandwich layer.

[0011] The inner wall of the inner shell is divided into three parts along the axial direction: front, middle and rear. The inner walls of the front and rear parts are cylindrical, and the two ends of the core shell are installed in them by smooth copper sleeves or bearings. The middle part has an annular groove along the circumference. A pendulum is provided at the lower end of the middle part of the outer wall of the core shell, and the pendulum can move circumferentially in the annular groove.

[0012] The beneficial effects of this invention are:

[0013] 1) This invention has a three-layer shell. The inner core shell 39 and core shell cover 27 are made of stainless steel vacuum liner, which serves as internal insulation. Inside the vacuum liner, the core shell cover 27 has an additional cover insulation layer 43, and the inner core shell vacuum liner also has an insulated barrel 41. The insulated barrel 41 has holes, the size and position of which are determined according to the nature of the items actually placed inside. The perforated insulated barrel 41 can be made of aluminum foil rubber sheet material, which allows the cold energy of the irregularly shaped ice plate 44 to be slowly released into the insulated barrel 41, thus ensuring that the items inside are kept within a certain temperature range for a certain period of time.

[0014] 2) The intermediate layer of this invention is an inner shell 26. The inner shell 26 has a slide rail in the middle, and sliding bearings (preferably copper sleeves 38) or rolling bearings (preferably needle roller bearings) are installed at both ends, allowing the core shell 39 and the inner shell 26 to rotate relative to each other. A freely swinging pendulum 46 is located directly below the center of the core shell 39. When the container is transported at an angle, the pendulum 46 will also be offset. Due to gravity, the pendulum 46 will rotate back to its original position directly below the core shell and its contents, ensuring that even during bumps and swaying during loading and transportation, the contents maintain minimal movement. When towed using the three-fold pull rod 49, it ensures minimal movement of the contents during bumps, swaying, and changes in the towing angle. This is particularly advantageous for blood products, as excessive shaking and impact can accelerate their deterioration. This structure of the present invention allows the blood products inside the core shell to remain relatively stationary when the turnover box is tilted to the side using the pull rod and when it is loaded and transported on the vehicle, so as not to tilt along with the outer and inner shells, thereby minimizing unnecessary shaking of the blood products during transportation.

[0015] 3) This invention features like-paired permanent magnets on the exterior of the inner shell 26 of the intermediate layer and on the interior of the outer shell 1 in three directions: front-back, top-bottom, and left-right. Sintered neodymium iron boron permanent magnets are preferred, but other types can also be used. Based on the principle of magnetic levitation, the vibration and impact in these three directions when the contents are moved externally can be reduced. After the impact is weakened by the magnets, it is further supported by flexible circular pads. This invention can be used in the logistics and transportation field, and is particularly advantageous for blood products. Excessive shaking and impact on blood products can accelerate their deterioration. This structure of the invention reduces the vibration of the blood products inside the core shell caused by impacts in the three external directions when the turnover box is tilted by the pull rod or transported on a vehicle. Furthermore, when this invention is used as a blood product turnover box, its automatic return function (through the structure of the pendulum 46 and the sliding or rolling bearing) and magnetic levitation vibration reduction function enable the blood products in the heat-insulating container 41 to generate slight swaying due to external shaking. This can accelerate the internal air convection, enhance the cold air convection on the surface of the blood products, make the temperature inside the turnover box uniform, and at the same time prevent the blood products from settling.

[0016] 4) The core shell 39 of the present invention is divided into three layers: upper, middle and lower. The middle layer is used to place items that need to be refrigerated. The number and specifications of ice plates can be selected for the upper and lower layers according to the number of items that need to be refrigerated placed in the middle layer, so as to ensure that the temperature in the core shell is maintained within the specified value.

[0017] 5) The three-layer shell and lid frame of this invention can be made of lightweight aluminum alloy, with plastic foam or polyurethane foam filling the middle. The overall structure is lightweight and easy to transport.

[0018] 6) The rollers 48 and the three-fold pull rod 49 used for transportation in this invention are compact and flexible. When the three-fold pull rod 49 is folded up, both the rollers 48 and the three-fold pull rod 49 are within the external dimensions of the turnover box body, and the size will not be increased by adding rollers 48 and three-fold pull rod 49 for easy transportation. In order to further reduce the size, the rollers 48 and three-fold pull rod 49 can also be removed from this invention and used in a carrying manner.

[0019] 7) Between the outer shell and the inner shell of this invention, there are polyurethane anti-collision rings 10 or flexible round pads 17 in the up-down, left-right, and front-back directions to protect the permanent magnets. In case a permanent magnet breaks or fails, or the magnetic levitation function weakens or fails in a certain direction, the anti-collision rings 10 or flexible round pads 17 can also protect the three-layer shell.

[0020] 8) This invention has a wide range of applications and can be used to transport various items that require insulation or cold preservation, maintaining the temperature of the items within a certain range of variation for a certain period of time. The invention is compact, easy to handle, easy to stack, and easy to carry. Velcro or other connecting structures can be added as needed to connect them during stacking on the vehicle, increasing safety during transportation. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention.

[0022] Figure 2 This is a side view of the present invention.

[0023] Figure 3 This is a front view of the invention being dragged in the unfolded and self-locking state of the three-fold pull rod 49.

[0024] Figure 4 This is a side view of the present invention standing upright on the placement surface in the unfolded and self-locking state of the three-fold pull rod 49.

[0025] Figure 5 This is a schematic diagram of the stacking and storage according to the rules of the present invention.

[0026] Figure 6 This is a front view of the present invention, showing how Velcro 50 is used to secure the stacked items during storage.

[0027] Figure 7 This is a side view of the present invention, showing the use of Velcro 50 for securing the palletized items during storage.

[0028] Figure 8 and 9 This is an axonometric view of the main body of the present invention.

[0029] Figure 10 This is a front view of the outer shell cover 2 of the main body of the present invention in the state of being opened 180 degrees.

[0030] Figure 11 This is a front view of the main body of the present invention with the outer shell cover 2 opened 180 degrees and the inner shell portion removed.

[0031] Figure 12 and 13 This is an isometric view of the outer shell 2 of the main body of the present invention with the inner shell portion removed after it is opened 180 degrees.

[0032] Figure 14 This is a front view of the main body of the present invention after removing the relevant components of the outer shell 1 and the outer shell cover 2.

[0033] Figure 15 and 16 This is an isometric view of the main body of the present invention after removing the relevant components of the outer shell 1 and the outer shell cover 2.

[0034] Figure 17 and 18 This is an isometric view of the inner shell portion of the present invention.

[0035] Figure 19 This is an axial sectional view of the inner shell of the present invention and the magnet and copper sleeve 38 mounted on it.

[0036] Figure 20 This is an axial sectional view of the main body of the present invention.

[0037] Figure 21 This is an axial perspective view of the core shell 39 and the core shell cover 27 of the present invention.

[0038] Figure 22 This is an axonometric view of the core shell 39 and the core shell cover 27 of the present invention.

[0039] Figure 23 This is an isometric view of the heat insulation barrel 41 of the present invention.

[0040] Figure 24 This is an axonometric view of the irregularly shaped ice plate 44 of the present invention.

[0041] Figure 25 This is an axial sectional view of preferred embodiment 2 of the main body of the present invention. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. The present invention includes, but is not limited to, the following embodiments.

[0043] The core idea of ​​this invention is to use a spatially arranged magnetic levitation structure and flexible pads between the outer and inner shells of the turnover box. The magnetic levitation structure reduces vibration and impact forces in three directions during external movement, while the flexible pads provide support. The inner shell contains a core shell, and there are rolling bearings (or sliding bearings, such as those made of nylon) and a sliding track structure between the core shell and the inner shell. This allows the blood products inside the core shell to remain relatively stationary when the turnover box is moved sideways using a pull rod or on a sloped surface, preventing them from tilting with the outer and inner shells and minimizing unnecessary shaking of the blood products during transport.

[0044] The core shell of the turnover box is a metal vacuum structure, divided into three layers: upper, middle, and lower. The middle layer is used to place blood products, and the number and size of ice plates in the upper and lower layers can be selected according to the amount of blood products placed in the middle layer to ensure that the temperature in the core shell is maintained within the specified value.

[0045] This invention can be used to transport goods and has a built-in refrigeration function, which can prevent the goods inside from shaking excessively during the rotation and movement of the turnover box. It is especially suitable for transporting blood products that require refrigeration.

[0046] The turnover box has a single-sided roller 48 and a three-fold pull rod 49. In its stored state, the turnover box stands upright on the placement surface, with the two rollers 48 mounted on the angled side suspended in the air and within the widest side of the turnover box; the three-fold pull rod 49 is folded and placed on the angled side, also within the maximum external dimension of the turnover box. A front view of the turnover box is shown below. Figure 1 Side view as follows Figure 2 The front view of the turnover box being dragged with the three-fold pull rod 49 unfolded and self-locking is shown below. Figure 3 The side view of the turnover box standing upright on the placement surface with the three-fold pull rod 49 unfolded and self-locking is as follows. Figure 4 .

[0047] This invention allows for regular stacking and storage when the three-fold pull rod 49 is folded up. The single-sided roller 48 and the three-fold pull rod 49 do not protrude from the overall dimensions of the self-stabilizing turnover box body (eliminating the roller 48 and three-fold pull rod 49 structure). Folding it up does not affect the storage space, and unfolding it allows for dragging and moving, which is very convenient. The regular stacking and storage method is as follows: Figure 5 .

[0048] Because the present invention is equipped with rollers 48 and a three-fold pull rod 49, it rotates and tilts only in the direction of one side of the outer shell 1 of the turnover box when moving, and does not rotate or tilt in the direction perpendicular to the outer shell cover 2.

[0049] To ensure the stability of the self-stabilizing turnover boxes during transportation, an interlocking structure, such as hooks or Velcro, can be added to the side of the invention. A simple structure using Velcro 50 is also possible. Figure 6 and Figure 7 As shown. Figure 6This is a front view of two crates connected by Velcro 50mm. Figure 7 This is a side view of the turnover box with Velcro 50 installed.

[0050] The external structure of the main body of this invention (excluding the roller 48 and the three-fold pull rod 49) is as follows: Figure 8 and Figure 9 As shown, it is a regular octagonal prism. The outer shell 1 and the outer shell cover 2 are connected by a sealing strip 9 for sealing the turnover box. The outer shell cover 2 has an embedded thin lock 3, including a latch 4 and a lock head 5, which is fixed to the outer shell cover 2 with four large cylindrical head screws 6.

[0051] The outer shell 1 and the outer shell cover 2 are made of lightweight aluminum alloy sheet on the outside and polyurethane layer on the inside, which is lightweight and has heat insulation function.

[0052] The outer shell 1 and the outer shell cover 2 are connected by an embedded hinge 7. The embedded hinge 7 is embedded inside the outer shell 1. When the outer shell cover 2 is opened, it can rotate 180 degrees around the hinge 7 and rest against the side of the outer shell 1. Below the embedded hinge 7 is an outer shell anti-collision pad 8. After the outer shell cover 2 is rotated open 180 degrees, it hits the outer shell anti-collision pad 8 without colliding with the outer shell 1, which is safe and reliable.

[0053] A round magnet 16 is centrally mounted on the inner side of the outer cover 2. It is secured to the inner side of the outer cover 2 using a magnet clamping end 13 and a movable end 14. The magnet clamping end 13 is welded to the outer cover 2, and the movable end 14 is secured to the inner side of the outer cover 2 using two large cylindrical head screws 15. This allows for easy cleaning and replacement of the round magnet 16. A front view of the outer cover 2 when it is opened 180 degrees is shown below. Figure 10 .

[0054] Figure 11 This is a front view of the outer casing 1 after removing the inner casing 26, the core casing cover 27, and their internal components. A round magnet 16 is installed centered at the bottom of the outer casing 1, and like on the outer casing cover 2, it is fixed to the inner bottom surface of the outer casing 1 using a round magnet clamping end 13 and a round magnet clamping movable end 14. The round magnet clamping end 13 is welded to the inner bottom surface of the outer casing 1, and the round magnet clamping movable end 14 is fixed to the inner bottom surface of the outer casing 1 using two large cylindrical head screws 15. This allows for easy cleaning and replacement of the round magnet 16.

[0055] On the eight inner walls of the regular octagon on the inner side of the outer shell 1, such as Figure 11 The placement direction is such that two flexible round pads 17 are fixedly installed on each of the four sides (top, bottom, left, and right) using large cylindrical head screws 11. Two vertical magnets 21 are installed on the two upper inclined surfaces, and two horizontal magnets 18 are installed on the two lower inclined surfaces. Both the vertical magnets 21 and the horizontal magnets 18 are designed to be detachable for easy cleaning and replacement. Figure 12 and Figure 13This is an axonometric view, showing the structure in which the longitudinal magnet 21 and the transverse magnet 18 are installed inside the housing 1.

[0056] The two ends of the horizontal magnet 18 are pressed down by the horizontal magnet clamps 19, and then fixed to the inner wall of the outer casing 1 with two large cylindrical head screws 20. The two vertical magnets 21 are separated by a fixed distance by a middle partition 23, and then the two ends of the vertical magnet 21 are pressed down by the middle slot 22, the fixed end 24 of the vertical magnet clamp, and the movable end 25 of the vertical magnet clamp. The fixed end 24 of the vertical magnet clamp and the middle slot 22 are welded and fixed to the inner wall of the outer casing 1. When installing the vertical magnet 21, first insert one vertical magnet 21 into the middle slot 22, and after the lower part is inserted into the fixed end 24 of the vertical magnet clamp, insert the middle partition 23 into the middle slot 22. The middle partition 23 presses against the first inserted vertical magnet 21, and then insert the second vertical magnet 21 into the middle slot 22 (at this time, only one side of the vertical magnet 21 is clamped). Finally, the movable end 25 of the vertical magnet clamp clamps the other side of the second vertical magnet 21 and fixes it to the inner wall of the outer casing 1 with two large cylindrical head screws 20.

[0057] Figure 14 This is a front view of the invention placed upright. With the outer shell 1 and outer shell cover 2 removed, and the parts 17-25 installed on the eight sides inside the outer shell 1 retained, the correspondence between the magnets installed on the inner side of the outer shell 1 and the outer side of the inner shell can be seen. On the eight outer sides of the inner shell 26, no parts are installed on the top, bottom, left, and right sides, corresponding to the flexible circular pads 17 installed on the inner wall of the outer shell 1. Two narrow square magnets 30 (fixed by the fixed end 31 and the movable ends 32, 33) are installed on the upper two sides, corresponding to the longitudinal magnets 21 installed on the upper two sides of the inner shell 1. Two wide square magnets 29 are installed on the lower two sides, corresponding to the transverse magnets 18 installed on the lower two sides of the inner shell 1. The correspondence between the upper narrow square magnets 30 and the longitudinal magnets 21 is shown below. Figure 15 The correspondence between the wide square magnet 29 and the horizontal magnet 18 in the lower inner shell is shown in [reference needed]. Figure 16 .

[0058] When the core cover 27 is placed on the core cover 26, a round magnet 16 is installed centered on the outer side of the core cover, corresponding to the position of the round magnet 16 on the inner side of the outer cover 2, and the installation method is the same. It is fixed to the outer side of the core cover 27 using a round magnet clamp fixing end 13 and a round magnet clamp movable end 14. The round magnet clamp fixing end 13 is welded to the outer side of the core cover 27, and the round magnet clamp movable end 14 is fixed to the outer side of the core cover 27 using two large cylindrical head screws 15. This is detachable, facilitating cleaning and replacement of the round magnet 16. See [link / description]. Figure 17A round magnet 16 is also installed at the center of the bottom outer side of the inner shell 26, corresponding to the position of the round magnet 16 installed on the bottom inner surface of the outer shell 1, and the installation method is the same. An anti-collision ring 10 is installed outside the round magnet 16 at the bottom outer side of the inner shell 26, and is fixed with three large cylindrical head screws 11, see... Figure 18 On the eight sides of the outer surface of the inner shell 26, only the upper two inclined surfaces are fitted with the inner shell narrow square magnets 30, and the lower two inclined surfaces are fitted with the inner shell wide square magnets 29, corresponding to the eight sides inside the outer shell 1.

[0059] Therefore, there are corresponding pairs of magnets between the outer shell and the inner shell in the front-back, up-down, and left-right directions. Sintered neodymium iron boron permanent magnets are selected and the principle of magnetic levitation is used. The S-pair is installed with S-pair or N-pair with N-pair. This can reduce the intensity of vibration and impact in the three directions when the external movement occurs. After the impact is weakened by the magnet pairs, it is supported by the flexible round pad.

[0060] The magnet is not limited to sintered neodymium iron boron permanent magnets; other permanent magnets can also be used as long as they can achieve the magnetic levitation function.

[0061] The inner shell 26 is made of metal (inner shell metal part 34). While ensuring strength, it is filled with lightweight insulation material (insulation material part 36), which enhances insulation and reduces weight. The inner shell is divided into three parts: front, middle, and rear. The front and rear parts are cylindrical, with smooth copper sleeves 38 nested inside, acting as sliding bearings. The middle part has a through annular groove, allowing the pendulum 46 to move freely. The top of the annular groove in the middle part is open and is plugged with a rubber stopper 37 during use. The inner bottom surface of the inner shell 26 has a raised part 35 in the middle for positioning in the front-to-back direction and reducing friction; this part can be made of metal or nylon. The inner shell 26 has no cover. The axial sectional view of the overall structure is shown below. Figure 19 .

[0062] A cylindrical core shell 39 is inserted into the copper sleeve 38, and a core shell cover 27 is placed on the core shell 39. Both the core shell 39 and the core shell cover 27 are hollow stainless steel liner. A lid insulation layer 43 is fixed under the core shell cover 27, which can be made of aluminum foil and rubber sheet. A side sealing strip 42 is fixed to the outside of the core shell cover 27, and the core shell cover 27 is sealed by the side sealing strip 42 after it is placed on the core shell 39. Two partitions 40 are welded inside the core shell 39, dividing the core shell 39 into three parts. The upper and lower parts are used to place irregularly shaped ice plates 44. One irregularly shaped ice plate 44 can be placed in each of the upper and lower parts, or the number of irregularly shaped ice plates 44 can be determined according to the number of refrigerated products placed in the middle part. An insulation bucket 41, which can be made of aluminum foil and rubber sheet, is placed in the middle part of the core shell 39.

[0063] The axial sectional view of the integral turnover box is shown below. Figure 20Support 45 is welded to core shell 39, and pendulum 46 passes through small shaft 47.

[0064] Fixed to the support 45, the pendulum is restricted in the front-to-back direction by the support 45, but can swing freely in the circumferential direction. The pendulum 46 is located in the annular groove in the middle of the inner shell 26 and can move freely. Both the front and rear parts of the core shell 39 are within the copper sleeve 38 and can also rotate freely. When the self-stabilizing turnover box tilts, both the outer shell 2 and the inner shell 26 tilt, causing the core shell 39, along with the pendulum 46, to rotate relative to the ground at a certain angle. Due to the instability of the center of gravity caused by the presence of the pendulum 46, the pendulum 46 will rotate back to its original position (the lowest position of the pendulum 46) along with the core shell 39 due to its own weight.

[0065] This allows the contents inside to rotate within the copper sleeve 38 at different tilts of the outer shell 1, returning to their original 0 position (the pendulum 46 at its lowest position).

[0066] Core shell 39 with core shell cover 27 Figure 21 and Figure 22 , Figure 21 It is an axonometric perspective view. Figure 22 This is an isometric view. The partition plate 40 has six small holes, which can be adjusted according to temperature conduction requirements. The outer surface of the core cover 27 has two core cover handles 28; by engaging the holes in the two handles 28, the core cover 27 can be removed or replaced.

[0067] The heat insulation barrel 41 is installed between the two partitions 40 of the core shell 39, and is shaped like... Figure 23 The insulated container 41 has several holes (5 holes in total). The size and location of the holes are designed according to the nature of the items contained inside, so as to ensure that the items inside the insulated container 41 can be kept in a certain temperature range.

[0068] The temperature must be maintained within a certain range.

[0069] An irregularly shaped ice plate 44 is inserted into the small space between the core shell 39 and the partition 40 to maintain the long-term refrigeration temperature required for the items inside the insulated container 41. Depending on the quantity of items to be stored, two irregularly shaped ice plates 44 can be used, one upper and one lower.

[0070] Alternatively, you can use only one irregularly shaped ice plate 44. See the external dimensions of the irregularly shaped ice plate 44. Figure 24 There are two cylindrical holes on the outer side for easy handling.

[0071] Figure 1-24 In preferred embodiment 1 of the present invention, the support and free rotation between the inner shell 26 and the core shell 39 adopt a sliding bearing structure, using a copper sleeve 38. The copper sleeve 38 is embedded in the inner wall of the inner shell 26, and the core shell 39 is installed in the copper sleeve 38, allowing for smooth rotation in the circumferential direction. Alternatively, the copper sleeve 38 can be replaced with a material such as nylon.

[0072] An axial sectional view of preferred embodiment 2 of the present invention is shown below. Figure 25 Instead of using the sliding bearing structure of preferred option 1, a rolling bearing structure was adopted. Figure 25 The inner housing 26 uses a needle roller bearing 51 to support the core housing 39.

[0073] Furthermore, the needle roller bearing allows the core shell 39 to rotate freely within the inner shell 26. The outer ring of the needle roller bearing 51 is fixed to the inner side of the inner shell 26, and the needle rollers of the needle roller bearing 51 contact the outer cylindrical surface of the core shell 39. Similarly, when a self-stabilizing turnover box tilts, both the outer shell 2 and the inner shell 26 tilt, causing the core shell 39, along with the pendulum 46, to rotate relative to the ground at a certain angle. Due to the instability of the center of gravity caused by the presence of the pendulum 46, the pendulum 46 will rotate back to its original position (the lowest position) along with the core shell 39 due to its own weight. At this time, the outer ring of the needle roller bearing 51 is fixed to the inner shell 26, while the core shell 39 can rotate freely within the needle roller bearing, allowing the contents inside to rotate back to their original position (the lowest position) within the needle roller bearing at any time, regardless of the tilt of the outer shell 1.

[0074] When using this invention, self-stabilizing turnover boxes of different sizes can be manufactured. If the space is relatively tight, needle roller bearings 51 without outer ring structure can be selected.

[0075] The steps for using this invention are as follows:

[0076] 1) Place the invention in place, upright on the placement surface, and fold up the three-fold pull rod 49;

[0077] 2) Use the key to open the thin lock 3 and open the outer cover 1 (it can be opened 180 degrees);

[0078] 3) Remove the core cover 27 using the core cover latch 28;

[0079] 4) Take out or put in the refrigerated items to be stored from the insulated container 41 and stack them neatly;

[0080] 5) Remove or insert the irregularly shaped ice plate 44 from the core shell 39;

[0081] 6) Install the core shell cover 27 onto the core shell 39;

[0082] 7) Close the outer cover 1 and lock the thin lock 3;

[0083] 8) Unfold the three-fold pull rod 49 and lock it in place to pull away a self-stabilizing turnover box.

[0084] In the preferred embodiment 1 of the present invention, the length from the outer shell cover 2 to the bottom surface of the outer shell 1 is 460mm, and the vertical height and horizontal width of the regular octagonal outer shell 1 are both 500mm. The outer shell 1, outer shell cover 2, inner shell 26, and the metal parts for fixing the permanent magnets are made of lightweight aluminum alloy, and the internal space is filled with polyurethane foam for insulation. The anti-collision rings 10 and flexible round pads 17 are made of polyurethane plastic. The end face round magnets 16, transverse magnets 18, longitudinal magnets 21, inner shell wide square magnets 29, and inner shell narrow square magnets 30 are sintered neodymium iron boron permanent magnets. Polyurethane anti-collision rings 10 or flexible round pads 17 are provided in the vertical, horizontal, and front-back directions to protect the permanent magnet pairs. In case a permanent magnet breaks or fails, or the magnetic levitation function weakens or fails in a certain direction, the anti-collision rings 10 or flexible round pads 17 structure can also protect the three-layer shell.

[0085] The inner shell 26 has a copper sleeve 38 embedded at both the front and rear. The copper sleeve 38 is a high-precision machined ring, 128mm long, 340mm inner diameter, and 8mm wall thickness, made of self-lubricating tin bronze. The core shell 39 is installed inside the copper sleeve 38. (In preferred embodiment 2, the needle roller bearing is an NA4868 needle roller bearing with an inner diameter of 340mm, an outer diameter of 420mm, and a width of 80mm.)

[0086] The core shell 39 and core shell cover 26 are made of high-quality stainless steel vacuum liner with a stainless steel wall thickness of 3mm. The total length of the core shell 39 and core shell cover 26 is 357mm, and the outer diameter of the side cylinder is 340mm. The heat insulation barrel 41 inside the core shell and the heat insulation layer 43 of the cover are made of 10mm thick aluminum foil rubber sheet.

[0087] The irregularly shaped ice plate 44 inside the core shell 39 is made of thickened PE material with a wall thickness of 2.5mm and a capacity of 1.8 liters. Smaller ice plates can be installed as needed. The insulated barrel 41 in the middle of the core shell 39 has an internal volume of approximately 4 liters and can hold items up to 4 liters in size.

Claims

1. A self-stabilizing turnover box, comprising a body, a pull rod, and rollers, characterized in that, The main body is a hollow cylindrical structure, including an outer shell, an inner shell, and a core shell. The inner shell is installed inside the outer shell, with a gap between them. The core shell is installed inside the inner shell and can rotate around its own axis within the inner shell. The outer shell is open at least one end and is provided with an outer shell cover. The core shell is open at least one end and is provided with a core shell cover. Several magnets and flexible gaskets are provided on the inner wall of the outer shell cover and the inner wall of the outer shell. Magnets are also provided on the outer wall of the inner shell at positions corresponding to the magnets on the inner wall of the outer shell. The magnets at corresponding positions on the outer shell and the inner shell have the same magnetism. Magnets are also provided on the core shell cover at positions corresponding to the magnets on the inner wall of the outer shell cover. The magnets at corresponding positions on the outer shell cover and the core shell cover have the same magnetism. The outer shell and the outer shell cover are made of metal material with a heat-insulating layer. The core shell is made of metal material with a vacuum layer. The core shell contains a heat-insulating barrel divided into three layers: upper, middle, and lower. Several through holes are opened in the wall of the heat-insulating barrel. Ice plates are filled in the upper and lower layers, and blood products are placed in the middle layer. The pull rod and roller are installed on the outer wall of the main body. The inner wall of the inner shell is divided into three parts along the axial direction: front, middle and rear. The inner walls of the front and rear parts are cylindrical, and the two ends of the core shell are installed in them through smooth copper sleeves or bearings. The middle part has an annular groove along the circumference; a pendulum is provided at the lower end of the middle part of the outer wall of the core shell, and the pendulum can move circumferentially within the annular groove.

2. The self-stabilizing turnover box according to claim 1, characterized in that, The outer shell is an octagonal prism, and the corresponding inner shell is also an octagonal prism; the rollers are installed on a certain wall surface of the outer side of the octagonal prism, and the two rollers are set at the axial ends of the wall surface. When the body is placed on a horizontal plane with the adjacent wall surface of the rollers, the projection of the rollers on the horizontal plane falls within the projection of the body.

3. The self-stabilizing turnover box according to claim 1, characterized in that, The aforementioned pull rod is a folding pull rod.

4. The self-stabilizing turnover box according to claim 1, characterized in that, An interlocking structure is provided on the outer wall of the main body for stable interconnection between two adjacent self-stabilizing turnover boxes when several self-stabilizing turnover boxes are stacked in a regular manner; the interlocking structure adopts hooks or Velcro.

5. The self-stabilizing turnover box according to claim 1, characterized in that, The outer cover is connected to the outer shell via an embedded hinge, a sealing strip is provided between the outer cover and the outer shell, and an embedded lock is installed on the outer cover for connecting and locking the outer shell.

6. The self-stabilizing turnover box according to claim 1, characterized in that, The outer shell and outer cover are both made of aluminum alloy, and the inner part is a polyurethane sandwich layer.

Images