Self-fixing device based on gravity and self-fixing module

Abstract

The invention provides a gravity-based self-fixing device and a self-fixing module, and relates to the technical field of limiting, the gravity-based self-fixing device is used for being arranged on a bearing surface so as to limit a tray loaded with goods on the bearing surface, the self-fixing device comprises a base assembly and at least one limiting structure, the limiting structure is arranged on the base assembly, and the limiting structure is arranged on the base assembly. The limiting structure comprises an elastic lifting mechanism, and the bottom end of the elastic lifting mechanism is connected to the top of the base assembly. One end of the action plate is connected with the lifting end of the elastic lifting mechanism; one end of the action swing arm is connected with the lifting end of the elastic lifting mechanism in a hinged mode, one end of the limiting swing arm is connected with the base in a hinged mode, and the middle of the limiting swing arm is connected with the other end of the action swing arm in a hinged mode; the self-fixing device is a bottom restraining device which is specially designed for a narrow space of a cargo transport vehicle and is capable of automatically limiting and relieving limiting, and has the characteristics of being simple in structure, low in manufacturing cost and high in working automation degree.

Description

Technical Field

[0001] The present invention belongs to the technical field of limit, and more specifically, relates to a gravity-based self-fixing device and a self-fixing module. Background Art

[0002] Currently, transporting daily supplies by means of railways, urban rails, etc. has gradually become normal, and railway freight has become an indispensable link in connecting road transportation to complete a long-distance, safe and efficient transportation chain. This method is exactly the transportation method that China and even the whole world are currently promoting and developing - multimodal transportation.

[0003] For the multimodal transportation of railway goods, it transports the goods transferred by the shipper by means of road transportation to the receiving place of the consignee, so that the consignee can then transfer them to the final destination by road transportation. In this way, this type of transportation method can make good use of the advantages of the cargo capacity scale of the existing lines in China and give full play to the safe and economical transportation characteristics of the railway lines, and can minimize the transportation costs for users.

[0004] However, in the cases of multimodal transportation of goods, generally the goods transported are not bulk granular goods, but are often commodities with different packaging types and different shapes and specifications for different receiving users. In addition, to facilitate the sorting of goods destined for different destinations and the timely loading and unloading of goods. The goods are generally placed on a pallet for fixing, and then the whole is placed on the loading surface of a container such as a transport vehicle or a container. To prevent the goods from colliding and being damaged or causing a traffic accident due to the running of the vehicle during transportation, it is particularly necessary to limit the entire pallet. Traditionally, the pallet loaded with goods is fixed by a strong restraint method. In this way, it is not only not conducive to the timely loading and unloading of goods by forklifts, but also requires a large amount of manpower, material resources and delays a lot of valuable time during the fixing and removal processes.

[0005] Therefore, it is now decided to create a gravity self-fixing device that can automatically limit or fix the goods when the forklift puts in the goods, and can release the limit or fixation of the goods in a timely or coordinated manner when the forklift forks up the goods, so as to provide a reasonable new technical solution to solve the practical problems of inconvenient forklift transportation and large workload of bundling and fixing. The technical solution of this self-fixing device can also be applied to the limit of other components of railway vehicles such as mobile escalators, air reservoirs, etc., and it is of positive significance in promoting the solution of existing problems, improving the safety of goods transportation, and reducing operating costs. Summary of the Invention

[0006] The object of the present invention is to provide a gravity-based self-fixing device and a self-fixing module in view of the deficiencies of the existing technologies, so as to solve the problem that when a conventional pallet for loading goods is placed on the bearing surface of a container such as a vehicle or a container, a strong restraint fixing method is generally adopted for limiting. In this way, it is not only unfavorable for the forklift to load and unload goods in time, but also a large amount of manpower, material resources and a lot of precious time are consumed in the fixing and removing processes.

[0007] To achieve the above object, the present invention provides a gravity-based self-fixing device for being arranged on a bearing surface to limit a pallet loaded with goods on the bearing surface. The self-fixing device includes a base assembly and at least one limiting structure. The limiting structure is arranged on the base assembly, and the limiting structure includes:

[0008] An elastic lifting mechanism, the bottom end of which is connected to the top of the base assembly;

[0009] An action plate, one end of which is connected to the lifting end of the elastic lifting mechanism;

[0010] An action swing arm and a limiting swing arm, the action swing arm and the limiting swing arm are arranged on one side of the action plate. One end of the action swing arm is hinged to the lifting end of the elastic lifting mechanism, one end of the limiting swing arm is hinged to the base assembly, the middle part of the limiting swing arm is hinged to the other end of the action swing arm, and the limiting swing arm can swing to a position where it blocks the movement of the pallet when the pallet presses down the action plate.

[0011] Preferably, the number of the limiting structures is two, and the two limiting structures are symmetrically arranged on the base assembly. The two action plates are arranged on both sides of the base assembly, and the two limiting swing arms can respectively swing to positions where they block the movement of the two pallets when the adjacent two pallets respectively press down the two action plates.

[0012] Preferably, the elastic lifting mechanism includes:

[0013] A side column, the bottom end of which is connected to the top of the base assembly;

[0014] A support spring, which is sleeved on the side column;

[0015] A top plate, which is the lifting end of the elastic lifting mechanism. The top plate is provided with a guiding hole, and the guiding hole is sleeved on the side column and is slidably connected to the side column.

[0016] Preferably, the action plate includes:

[0017] A guide plate, one end of which is connected to the lifting end of the elastic lifting mechanism, and the guide plate is inclined in a direction away from the elastic lifting mechanism;

[0018] A pressing plate is arranged horizontally and connected to the other end of the guide plate.

[0019] Preferably, the base comprises a seat plate and a first side plate, the seat plate and the first side plate are vertically connected, and one end of the limiting swing arm is hingedly connected to the first side plate.

[0020] Preferably, the gravity-based self-fixing device also includes a limit fulcrum, which is arranged between the two limit swing arms, and the limit fulcrum is connected to the base component, and the opposite sides of the two limit swing arms can be respectively attached to the two ends of the limit fulcrum.

[0021] Preferably, the gravity-based self-fixing device also includes a middle column, which is arranged between the two elastic lifting mechanisms, and the bottom end of the middle column is connected to the base component. The lifting ends of the two elastic lifting mechanisms are close to each other and are provided with limiting grooves. The two limiting grooves form a limiting hole, and the middle column passes through the limiting hole.

[0022] Preferably, the elastic lifting mechanism further includes a second side plate, the top plate and the second side plate are vertically connected, and one end of the action swing arm is hingedly connected to the second side plate.

[0023] Preferably, the action plate also includes two connecting plates, which are vertically arranged, one end of the guide plate and the lifting end of the elastic lifting mechanism are respectively connected to the bottom end and the top end of one of the connecting plates, and the other end of the pressure plate and the guide plate are respectively connected to the bottom end and the top end of the other connecting plate.

[0024] A gravity-based self-fixing module, the self-fixing module comprising:

[0025] A plurality of gravity-based self-fixing devices are arranged in a plurality of rows on the load-bearing surface, at least four of the limiting structures are arranged on the peripheral sides of each cargo placement area of the load-bearing surface, and the pallet of each cargo placement area is prevented from moving around by at least four limiting swing arms.

[0026] The present invention provides a self-fixing device and a self-fixing module based on gravity, which has the beneficial effect of providing corresponding limiting structures around the area where the goods are to be placed on the rail vehicle, so that the pallet loaded with goods can be restrained in real time when the forklift forks are placed. This provides a new technical solution with high automation and strong economic benefits to solve the problems of sliding, side swinging when passing curves, etc. that may occur during the transportation of goods.

[0027] This self - fixing device can not only guide the placed tray to be placed in place in time. At the same time, through the elastic lifting mechanism on the self - fixing device, when passing through a curve, it can timely identify the top - leaning support of the tray under the influence of centripetal forces of different magnitudes, so as to carry out flexible deployment or compensation. After passing through the curve, it can timely assist in restoring the original state to weaken the influence of inertial forces, providing another reliable guarantee for safe transportation.

[0028] The entire self - fixing device also has the characteristics of simple structure, low manufacturing cost and high degree of work automation. Thus, it greatly highlights good comprehensive benefits.

[0029] Other features and advantages of the present invention will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above - mentioned and other objects, features and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0031] Figure 1 Fig. 1 shows a three - dimensional structural schematic diagram of a gravity - based self - fixing device according to an embodiment of the present invention;

[0032] Figure 2 Fig. 2 shows a front - view structural schematic diagram of a gravity - based self - fixing device according to an embodiment of the present invention;

[0033] Figure 3 Fig. 3 shows a side - view structural schematic diagram of a gravity - based self - fixing device according to an embodiment of the present invention;

[0034] Figure 4 Fig. 4 shows a top - view structural schematic diagram of a gravity - based self - fixing device according to an embodiment of the present invention;

[0035] Figure 5 Fig. 5 shows a rear - view structural schematic diagram of the base composition of a gravity - based self - fixing device according to an embodiment of the present invention;

[0036] Figure 6 Fig. 6 shows a side - view structural schematic diagram of the base composition of a gravity - based self - fixing device according to an embodiment of the present invention;

[0037] Figure 7 Fig. 7 shows a top - view structural schematic diagram of the base composition of a gravity - based self - fixing device according to an embodiment of the present invention;

[0038] Figure 8A schematic diagram of the main structure of an action plate of a gravity-based self-fixing device according to an embodiment of the present invention is shown;

[0039] Figure 9 A schematic diagram of the side structure of an action plate of a gravity-based self-fixing device according to an embodiment of the present invention is shown;

[0040] Figure 10 A schematic diagram of the main top view structure of an action plate of a gravity-based self-fixing device according to an embodiment of the present invention is shown;

[0041] Figure 11 A schematic diagram of the structure of an action swing arm of a gravity-based self-fixing device according to an embodiment of the present invention is shown;

[0042] Figure 12 A schematic diagram of the structure of a limit swing arm of a gravity-based self-fixing device according to an embodiment of the present invention is shown;

[0043] Figure 13 A schematic diagram of a top view of a gravity-based self-fixing module according to an embodiment of the present invention is shown. Figure 1 ;

[0044] Figure 14 A schematic diagram of a top view of a gravity-based self-fixing module according to an embodiment of the present invention is shown. Figure 2 .

[0045] Description of reference numerals:

[0046] 1. Base components; 101. Seat plate; 102. First side plate; 2. Action plate; 201. Guide plate; 202. Press plate; 203. Connecting plate; 3. Elastic lifting mechanism; 301. Side column; 302. Support spring; 303. Top plate; 304. Second side plate; 305. Guide hole; 4. Action swing arm; 5. Limiting swing arm; 6. Tray; 7. Bearing surface; 8. Limiting fulcrum; 9. Middle column; 10. Limiting hole; 11. First connecting hole; 12. Second connecting hole; 13. Third connecting hole. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0048] like Figures 1-4As shown in the figure, the present invention provides a gravity-based self-fixing device for being arranged on a bearing surface 7 to limit a pallet 6 loaded with goods on the bearing surface 7. The self-fixing device includes a base assembly 1 and at least one limiting structure. The limiting structure is arranged on the base assembly 1 and includes:

[0049] An elastic lifting mechanism 3, the bottom end of the elastic lifting mechanism 3 is connected to the top of the base assembly 1;

[0050] An action plate 2, one end of the action plate 2 is connected to the lifting end of the elastic lifting mechanism 3;

[0051] An action swing arm 4 and a limiting swing arm 5, the action swing arm 4 and the limiting swing arm 5 are arranged on one side of the action plate 2. One end of the action swing arm 4 is hinged to the lifting end of the elastic lifting mechanism 3, one end of the limiting swing arm 5 is hinged to the base assembly 1, and the middle of the limiting swing arm 5 is hinged to the other end of the action swing arm 4. The limiting swing arm 5 can swing to a position that blocks the movement of the pallet 6 when the pallet 6 presses down the action plate 2.

[0052] Specifically, to solve the problem that when a traditional pallet loaded with goods is placed on the bearing surface of a container such as a vehicle or a container, a strong constraint fixing method is generally adopted for limiting. In this way, it is not only not conducive to the forklift to load and unload goods in time, but also, the fixing and dismantling processes require a large amount of manpower, material resources and waste a lot of precious time. The present invention provides a gravity-based self-fixing device, which is composed of a base assembly 2 that provides stable limitation, at least one action plate 2, at least one elastic lifting mechanism 3, at least one action swing arm 4 and at least one limiting swing arm 5. When the forklift forks up the pallet 6 loaded with goods to a certain height and gradually places it on the action plate 2, the action plate 2 vertically compresses the elastic lifting mechanism 3 downward, and at the same time pushes the action swing arm 4 to swing obliquely downward. Under the action of the action swing arm 4, the limiting swing arm 5 also swings obliquely downward until the forklift completely places the pallet 6 in the storage position and completely presses down the action plate 2, and then the forklift can slowly withdraw the fork.

[0053] The process of the swinging action of the limiting swing arm 5 is like the "opening of an umbrella" process when the umbrella ribs expand. On the contrary, when the forklift fork is inserted into the bottom of the pallet 6 and first vertically lifts the pallet 6, this process can also be regarded as a gradual "closing of the umbrella" process. Thus, when the forklift wants to release the fixation of the self-fixing device on the pallet 6, it first needs to perform a vertical lifting operation. After the limiting swing arm 5 is completely retracted, it can then perform an outward movement action.

[0054] The limiting action driving source of this self-fixing device completely comes from the gravity of the goods themselves. Therefore, the greater the weight, the greater the safety factor of using this self-fixing device. Of course, according to the actual weight of the transported goods, the elastic coefficient of the matching elastic lifting mechanism 3 and its vertical movement stroke can be coordinately adjusted. In this way, the pallet 6 carrying the goods can completely release the restraint only when it bears a large vertical load and continuously raises it to the designed height. Otherwise, during its upward jump, the limiting swing arm 5 will still be in the process of gradually "closing the umbrella", but always restrict the movement within the plane of the pallet 6, thus ensuring the use safety. In addition, although during the vehicle operation, the goods will jump or skid due to the vehicle bearing alternating loads or when the vehicle passes through a curve, theoretically, there will be no large vertical jump; in other words, if such a large vertical jump occurs, at least an accident of the whole vehicle overturning will occur. Secondly, the complete set of this self-fixing device will also enhance the self-balancing adjustment ability of the goods to provide centripetal force when the vehicle passes through a curve to a certain extent.

[0055] This self-fixing device starts from the details of the vertical lifting and lowering during the storage process of the pallet 6, converts the vertical displacement of the pallet 6 into automatic limiting and automatic unlocking through the limiting structure. This self-fixing device is a bottom restraint device for automatic limiting and releasing the limit specifically designed for the narrow space of goods transportation vehicles. Therefore, it has very important significance for promoting high-efficiency, low-cost, and multi-category logistics transportation of vehicles.

[0056] As Figure 1 shown, preferably, the number of the limiting structures is two, the two limiting structures are symmetrically arranged on the base assembly 1, the two action plates 2 are arranged on both sides of the base assembly 1, and the two limiting swing arms 5 can swing to the positions blocking the movement of the two pallets 6 respectively when the adjacent two pallets 6 press down the two action plates 2 respectively.

[0057] Specifically, since the goods placement area on the rail vehicle is generally relatively compact, an integrated design has been carried out to achieve the design of combining the two limiting structures into one. This move can greatly save the setting space, and the left and right limiting structures can work independently of each other without interference. Therefore, in addition to being applicable to the large-scale logistics transportation scenario, it can also be applied to other scenarios of railway vehicles such as the fixation of air ducts and air cylinders. To achieve the automatic working characteristics of this self-fixing device, its vertical binding force is not strong. Therefore, when it is applied in the scenario of strengthening the vertical restraint, the number of existing planar restraint connectors can also be effectively simplified through this self-fixing device to highlight the application economy of this self-fixing device.

[0058] As Figure 2 、 Figure 5 and Figure 10 shown, preferably, the elastic lifting mechanism 3 includes:

[0059] Side column 301, the bottom end of the side column 301 is connected to the top of the base assembly 1;

[0060] Support spring 302, the support spring 302 is sleeved on the side column 301;

[0061] Top plate 303, the top plate 303 is the lifting end of the elastic lifting mechanism 3, the top plate 303 is provided with a guiding hole 305, and the guiding hole 305 is sleeved on the side column 301 and is slidably connected to the side column 301.

[0062] Specifically, during the lifting process of the tray 6, the support spring 302 can not only assist in the position-limiting function of the collaborative release of the position-limiting structure, but also, when the vehicle passes through a curve, due to the existence of the centripetal force of the goods, in addition to relying on the position-limiting effect of the position-limiting swing arm 5 to the greatest extent, the support force of the action plate 2 can also be automatically adjusted correspondingly by the pressure of the goods pre-applied on the action plates 2 at the four corners around, so that the tray 6 is in force balance in real time, and the situation that large-quality goods are easily affected by large inertial forces is weakened to the greatest extent, effectively ensuring the safety of goods transportation.

[0063] Such as Figures 8-10 shown, preferably, the action plate 2 includes:

[0064] Guide plate 201, one end of the guide plate 201 is connected to the lifting end of the elastic lifting mechanism 3, and the guide plate 201 is inclined away from the elastic lifting mechanism 3;

[0065] Pressing plate 202, the pressing plate 202 is horizontally arranged, and the pressing plate 202 is connected to the other end of the guide plate 201.

[0066] Specifically, the guide plate 201 and the pressing plate 202 form a step, and the guide plate 201 is inclined. When there is a deviation in the position where the tray 6 descends, the side wall of the tray 6 will descend along the guide plate 201, and the inclined guide plate 201 can correct the tray 6 in real time and quickly limit and lock the corrected tray 6.

[0067] Such as Figures 5-7 shown, preferably, the gravity-based self-fixing device further includes a limit fulcrum 8, the limit fulcrum 8 is arranged between the two limit swing arms 5, the limit fulcrum 8 is connected to the base assembly 1, and the opposite sides of the two limit swing arms 5 can respectively fit on both ends of the limit fulcrum 8.

[0068] Specifically, the limit fulcrum 8 is used to block the flipping of the limit swing arm 5 and prevent the limit swing arm 5 from over-flipping.

[0069] Such as Figure 4 and Figure 5As shown, preferably, the gravity-based self-fixing device further includes a middle column 9, which is arranged between two elastic lifting mechanisms 3. The bottom end of the middle column 9 is connected to the base assembly 1. Limiting grooves are provided at positions where the lifting ends of the two elastic lifting mechanisms 3 are close to each other, and a limiting hole 10 is formed by the two limiting grooves. The middle column 9 passes through the limiting hole 10.

[0070] Specifically, when the action plate 2 vertically compresses the support spring 302, it moves vertically downward under the dual limiting constraints of the middle column 9 and the side column 301. The middle column 9 is also used to resist the possible mutual approach and extrusion between the trays 6, which provides all-round protection for restricting the position of the goods.

[0071] As Figure 5 、 Figure 8 、 Figure 11 and Figure 12 shown, preferably, the base assembly 1 includes a seat plate 101 and a first side plate 102, which are perpendicularly connected. One end of the limiting swing arm 5 is hingedly connected to the first side plate 102;

[0072] The elastic lifting mechanism 3 further includes a second side plate 304, and the top plate 303 and the second side plate 304 are perpendicularly connected. One end of the action swing arm 4 is hingedly connected to the second side plate 304.

[0073] Specifically, first connection holes 11 are provided at one end of the limiting swing arm 5 and on the first side plate 102. After the two first connection holes 11 are aligned, a round pin and other connecting parts are inserted to complete the connection.

[0074] First connection holes 12 are provided at one end of the action swing arm 4 and on the second side plate 304. After the two second connection holes 12 are aligned, a pin shaft is inserted for hinge fixation.

[0075] Third connection holes 13 are provided at the middle of the limiting swing arm 5 and the other end of the action swing arm 4. After the two third connection holes 13 are aligned, a pin shaft is inserted for hinge fixation.

[0076] At this time, under the action of the support spring 302 pushing the top plate 303, the limiting swing arm 5 is tightly attached to the limiting fulcrum 8 like the ribs of a tightened umbrella. In addition, under the mutual pulling and pre-tightening action, the action swing arm 4 and the limiting swing arm 5 will also be strictly restricted to prevent them from deviating from the action plate 2. Since the two swing arms are connected by a pin shaft and a rotating pair needs to be ensured between the swing arms, the pin shaft at this place can be fixed by a connecting part similar to a blind rivet pin or by adding a mushroom-shaped cap at the end of the pin shaft later to prevent the pin shaft from coming out during use.

[0077] The self-fixing device has strong coherence. Through vertical compression, the action swing arm 4 acts on the limit swing arm 5 like the ribs of an "umbrella" on the branches of an "umbrella", so as to realize the functions of "opening" limit and "retracting" to release the limit. However, when the tray 6 needs to be limited, it actually relies on the connecting force between the limit swing arm 5 and the base assembly 1 rather than directly acting on the action swing arm 4. This can effectively improve the reliability of the application of the self-fixing device.

[0078] Preferably, the action plate further includes two connecting plates 203. The two connecting plates 203 are arranged vertically. One end of the guiding plate 201 and the lifting end of the elastic lifting mechanism 3 are respectively connected to the bottom end and the top end of one of the connecting plates 203, and the pressing plate 202 and the other end of the guiding plate 201 are respectively connected to the bottom end and the top end of the other connecting plate 203.

[0079] Specifically, the connecting plate 203 is used to connect the pressing plate 202 and the guiding plate 201. The side wall of the tray 6 can be abutted against the vertical surface of the connecting plate 203 to block the movement of the tray 6.

[0080] Such as Figure 13 and Figure 14 As shown in

[0081] A plurality of gravity-based self-fixing devices are arranged in multiple rows on the bearing surface 7. At least four limiting structures are arranged on the periphery of each goods placement area of the bearing surface 7. The trays 6 in each goods placement area are blocked from moving around by at least four limit swing arms 5.

[0082] Specifically, a plurality of gravity-based self-fixing devices form a gravity-based self-fixing module. Two limiting structures on one base assembly 1 can be respectively arranged in two adjacent goods placement areas. Limiting structures can be arranged at the four corners of each goods placement area, or limiting structures can be arranged on the sides between two corners according to the shape of the tray 6, which can just limit all possible moving directions of the tray 6. This process is the process of realizing planar fixation.

[0083] In summary, when the plurality of gravity-based self-fixing devices of the present application are arranged on the bearing surface of the rail vehicle, they form a gravity-based self-fixing module, and the limiting structures are distributed at the four corners of the vehicle goods placement area. Before the goods packed in a fixed manner with the tray are placed, the limit swing arm 5 on the base assembly 1 closely abuts against the limit fulcrum 8. At this time, the entire base assembly 1 is outside the goods placement area, laying a foundation for the subsequent unobstructed placement of the tray.

[0084] When the forklift transports the pallet 6 loaded with the forked goods to the top of the corresponding cargo storage area at a certain forklift height, the vertical height of the forked pallet 6 on the forklift is slowly lowered. During the lowering process, it is also necessary to confirm whether the pallet 6 is exactly on the action plate 2 of the limit structure at the four corners. If there is a deviation, at this time, the forklift can be used to make certain adjustments and continue to lower the vertical height of the pallet with the fork. If there is still a certain distance deviation, the pallet 6 will contact the inclined guide plate 201 when it descends. The guide plate 201 will support the pallet 6 and automatically coordinate the position of the pallet 6 to make it fall as far as possible above the cargo storage area. At this time, the forklift's fork is more used to lift the pallet 6 so that the pallet 6 slowly descends, thereby avoiding the occurrence of instantaneous falling. When the action plates 2 at each location completely lift the pallet 6 and descend to the bottom surface that fits the floor of the vehicle and is stable, the fork is then controlled to be removed.

[0085] When the pallet 6 is lowered along with the action plate 2, the top plate 303 compresses the support spring 302 and cooperatively drives the action swing arm 4 connected thereto to rotate downward. When the action swing arm 4 flips downward, it will also drive the limit swing arm 5 connected thereto to rotate downward by a certain angle. When the action plate 2 completely lifts the pallet 6 and descends until the bottom surface fits in with the vehicle floor and becomes stable, the limit swing arm 5 deflects to the maximum tilt angle. At this time, the tilted limit swing arm 5 just completely blocks or blocks the sliding direction of each load-bearing beam of the pallet 6, so as to completely confine the pallet 6 within the cargo release area. This process is also the process of releasing and fixing cargo.

[0086] When the goods to be transported to the destination need to be transported away, the forklift forks must first be aligned, evaluated and adjusted on the outside of the pallet 6, and the forklift must be started to approach the pallet 6. When the forks are just inserted into the bearing space at the bottom of the pallet 6 in the cargo area, the forks are slowly moved upward until the fork support surface is completely in contact with the lower plane of the pallet 6, and the forks are slowly lifted. At the same time, pay attention to whether there is a risk of the entire cargo touching other parts of the vehicle or other devices at the unloading port. That is, after reaching the maximum safe height that can be lifted, the pallet 6 is slowly moved vertically outward by the forklift until it completely leaves the vehicle. When the pallet 6 is lifted by the forklift, the elastic force of the support spring 302 will push the top plate 302 to rise along the side column 301 and the middle column 9. The action swing arm 4 connected to the top plate 302 is pulled together to make an upward rotational motion, and at the same time, the limit swing arm 5 connected to it is also driven to make an upward rotational motion. As the tray 6 is completely separated from the action plate 2, the limit swing arm 5 just rotates back to the position close to the limit fulcrum 8. This process is also the process of automatic limit release.

[0087] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A gravity-based self-fixing device for being arranged on a bearing surface to limit a pallet loaded with goods on the bearing surface, characterized in that The self-fixing device includes a base assembly and at least one limiting structure, the limiting structure is arranged on the base assembly, and the limiting structure includes: An elastic lifting mechanism, the bottom end of the elastic lifting mechanism is connected to the top of the base assembly; An action plate, one end of the action plate is connected to the lifting end of the elastic lifting mechanism; An action swing arm and a limiting swing arm, the action swing arm and the limiting swing arm are arranged on one side of the action plate, one end of the action swing arm is hinged to the lifting end of the elastic lifting mechanism, one end of the limiting swing arm is hinged to the base assembly, the middle of the limiting swing arm is hinged to the other end of the action swing arm, and the limiting swing arm can swing to a position to block the movement of the tray when the tray presses down the action plate.

2. The self-fixing device based on gravity according to claim 1, characterized in that, The number of the limiting structures is two, the two limiting structures are symmetrically arranged on the base assembly, the two action plates are arranged on both sides of the base assembly, and the two limiting swing arms can swing to positions to block the movement of the two trays respectively when the adjacent two trays press down the two action plates respectively.

3. The self-fixing device based on gravity according to claim 1, characterized in that, The elastic lifting mechanism includes: Side columns, the bottom ends of the side columns are connected to the top of the base assembly; Support springs, the support springs are sleeved on the side columns; A top plate, the top plate is the lifting end of the elastic lifting mechanism, the top plate is provided with a guiding hole, the guiding hole is sleeved on the side column and is slidably connected with the side column.

4. The self-fixing device based on gravity according to claim 1, characterized in that, The action plate includes: A guiding plate, one end of the guiding plate is connected to the lifting end of the elastic lifting mechanism, and the guiding plate is inclined away from the elastic lifting mechanism; A pressing plate, the pressing plate is horizontally arranged, and the pressing plate is connected to the other end of the guiding plate.

5. The self-fixing device based on gravity according to claim 1, wherein The base assembly includes a seat plate and a first side plate, the seat plate and the first side plate are vertically connected, and one end of the limiting swing arm is hinged to the first side plate.

6. The self-fixing device based on gravity according to claim 2, characterized in that, The gravity-based self-fixing device further includes a limiting fulcrum, the limiting fulcrum is arranged between the two limiting swing arms, the limiting fulcrum is connected to the base assembly, and the opposite sides of the two limiting swing arms can respectively fit on both ends of the limiting fulcrum.

7. The self-fixing device based on gravity according to claim 2, wherein The gravity-based self-fixing device further includes a middle column, the middle column is arranged between the two elastic lifting mechanisms, the bottom end of the middle column is connected to the base assembly, limiting grooves are respectively arranged at positions where the lifting ends of the two elastic lifting mechanisms are close to each other, and the two limiting grooves form a limiting hole, and the middle column penetrates through the limiting hole.

8. The self-fixing device based on gravity according to claim 3, wherein The elastic lifting mechanism further includes a second side plate, the top plate and the second side plate are vertically connected, and one end of the action swing arm is hinged to the second side plate.

9. The self-fixing device based on gravity according to claim 4, wherein, The action plate further includes two connecting plates, the two connecting plates are vertically arranged, one end of the guiding plate and the lifting end of the elastic lifting mechanism are respectively connected to the bottom end and the top end of one of the connecting plates, and the pressing plate and the other end of the guiding plate are respectively connected to the bottom end and the top end of the other connecting plate.

10. A gravity-based self-fixing module, characterized in that, The self-fixing module includes: Multiple gravity-based self-fixing devices according to any one of claims 1-9 are arranged in multiple rows on the bearing surface, at least four of the limiting structures are provided on the periphery of each goods placement area of the bearing surface, and the pallet in each goods placement area is blocked from moving around by at least four of the limiting swing arms.

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