Foldable transfer trolley

Abstract

The utility model discloses a collapsible transfer trolley in the technical field of logistics transfer, and the trolley plate is composed of two bearing plates hinged through hinges and oppositely opened, and the bottom surface is through a containing groove; four wheels are hinged in the groove through a support plate, the support plate can form vertical bearing by locking rod and through slot and counter slot insertion, and can also be locked by magnetic limiting member after folding; the handle is hinged and telescopic, and after folding, the whole is embedded in the stable groove of the containing groove and fixed by arc block spring buckle; the U-shaped block of the fixed assembly is bolted with the device rod to ensure the unfolding rigidity. When folding, the two bearing plates are folded, the wheels and the handle are all hidden, the appearance is regular cuboid, the length is reduced by about 50%, and the trolley can be inserted into the three-dimensional goods shelf at high density; after unfolding, the bearing is greater than or equal to 300 kg, the dead weight is less than or equal to 10 kg, and one person can quickly complete folding or unfolding, avoiding hand clamping; the parts are modularized and can be disassembled and replaced, maintenance is convenient, and the warehouse space utilization rate and the logistics transfer efficiency are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of logistics transfer technology, specifically a foldable transfer trolley. Background Technology

[0002] With the rapid development of e-commerce and intelligent manufacturing, the demand for high efficiency and space utilization in logistics and transfer equipment is increasing. As a core piece of equipment in warehousing and transfer processes, the technological iteration of foldable transfer trolleys has consistently focused on folding convenience, load-bearing stability, and adaptability to various scenarios. While existing technologies have made some progress in structural optimization, significant technical bottlenecks still exist, specifically:

[0003] For example, the logistics cart disclosed in patent number CN206485365U can only achieve height adjustment by loosening the fastener and retracting the bracket, but the length of the cargo box is not compressed. After folding, it still occupies a large amount of storage space, and the irregular shape after folding makes it difficult to meet the compact storage requirements of three-dimensional warehousing. Another example is the cart disclosed in patent number CN220332716U, which folds the push handle and wheels, but still occupies a large amount of storage space after folding.

[0004] To address the aforementioned issues, this application provides a foldable transport trolley. Utility Model Content

[0005] The purpose of this utility model is to provide a foldable transport trolley to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A foldable transport trolley includes a platform, wheels, a push handle, and a fixing assembly, wherein:

[0008] The vehicle platform consists of two support plates, which are connected by hinges on one side. Each of the two support plates has a receiving groove on its bottom side. When the two support plates are on the same plane, the two receiving grooves are connected.

[0009] The number of wheels is four and they are arranged in a rectangular shape. The four wheels can be folded and installed inside the two receiving slots.

[0010] The push handle is mounted on the side of one of the bearing plates facing away from the hinge shaft. When both bearing plates are folded, the push handle can be folded and mounted in the receiving groove on the other bearing plate.

[0011] The fixing component is used to fix the two support plates on the same plane.

[0012] Furthermore, support plates are hinged to the inner walls of both receiving slots. The wheel is rotatably mounted on the support plate via bearings. The bearing plate has two through slots that are connected to the receiving slots. A through slot is constructed on the support plate. When the support plate rotates to be perpendicular to the corresponding bearing plate, the through slot corresponds to one of the through slots and is located on the same straight line. An integral locking rod is movably inserted into the through slot and the corresponding through slot. A blocking block is fixed to one end of the locking rod, and a hexagonal nut is threaded onto the other end of the locking rod.

[0013] Furthermore, a limiting component is provided inside the receiving groove. When the support plate is folded inside the receiving groove, the limiting component is used to fix the support plate. The limiting component includes a limiting plate fixed to the inner wall of the receiving groove. A limiting rod is movably inserted into the limiting plate. A magnet is fixed to one end of the limiting rod. A limiting groove is constructed on the outer side of the support plate. The magnet is movably inserted into the limiting groove and magnetically connected to the groove wall of the limiting groove.

[0014] Furthermore, a mounting plate is fixed to the outer side of one of the bearing plates, and the push handle includes a connecting post fixed to the mounting plate, a push-pull rod hinged to the end of the connecting post, and a handle fixed to the end of the push-pull rod.

[0015] Furthermore, the push-pull rod includes a mounting sleeve with one end hinged to the connecting column, a mounting rod movably inserted into the other end of the mounting sleeve, a handle fixed to the end of the mounting rod, and a plurality of positioning holes arranged in an array along the length direction on the outer periphery of the mounting rod. A positioning pin is threaded into the mounting sleeve, and one end of the positioning pin is movably inserted into one of the positioning holes.

[0016] Furthermore, a stabilizing groove is constructed on the side of the other bearing plate opposite to the mounting plate, which communicates with the receiving groove. When the push handle is folded, the mounting sleeve is located inside the stabilizing groove. A stabilizing hole is constructed on the inner wall of the stabilizing groove. An arc-shaped block is movably installed inside the stabilizing hole. A spring is connected between the end of the arc-shaped block facing away from the arc surface and the hole wall of the stabilizing hole. An arc-shaped groove is constructed on the outer side of the mounting sleeve, and the arc-shaped block is movably inserted into the arc-shaped groove.

[0017] Furthermore, the number of fixing components is two and they are arranged symmetrically. Each fixing component consists of two U-shaped blocks and a device rod. The open ends of the two U-shaped blocks are respectively fixed to the inner walls of the two receiving grooves. The device rod is movably inserted into the openings of the two U-shaped blocks. The U-shaped blocks and the device rod are fixed together by bolts.

[0018] Furthermore, the two support plates are folded and then secured by fasteners.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Compared with the prior art, this application expands the foldable space in the length direction of the trolley from "single-point retraction of the push handle / bracket" to "longitudinal folding of the whole vehicle" through the "split-type support plate + accommodating slot" structure. After folding, the length is reduced to about 50% of the unfolded state and forms a regular rectangular flat block that can be directly inserted into the cell of the three-dimensional rack. This completely solves the problem of storage space waste caused by the inability to compress the length of the cargo box in CN206485365U and the irregular shape after folding in CN220332716U, and realizes high-density stacking of three-dimensional warehousing.

[0021] 2. In this solution, all wheels, handles, and support plates are folded into the receiving slots. After folding, the outer contour is flat with no exposed wheel rims, protruding handles, or brackets, avoiding interference between adjacent vehicle bodies and further increasing the number of units that can be placed in the same layer of the warehouse.

[0022] 3. In this solution, the support plate and the load-bearing plate adopt an integrated plug-and-play structure of "slotting-slotting-locking rod". A single person can complete the vertical locking or folding storage. The operation steps are reduced from multiple parts and steps in the existing technology to "one rod and one nut", which significantly reduces labor intensity. The limiting component is fixed by magnetic attraction of magnet and limiting groove. After folding, the support plate is reliably limited, eliminating noise and safety hazards caused by shaking during transportation. The push handle adopts a two-stage folding of hinge and telescopic, and with the arc block and spring automatic buckle, it can complete the storage or unfolding with "one push and one turn", avoiding the defect of traditional plug-and-play pins that are easy to pinch hands.

[0023] 4. The push handle in this solution is adjustable in length and can be completely hidden, so that the trolley can be used as a regular manual handling tool as well as a standard pallet unit in an automated warehouse; after folding, multiple trolleys can be quickly stacked together through fixing buckles to achieve batch transfer and improve the efficiency of empty trolley return. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention in its working state;

[0025] Figure 2 This utility model Figure 1 A three-dimensional sectional view in a certain direction;

[0026] Figure 3 This utility model Figure 1 A three-dimensional sectional view from another direction;

[0027] Figure 4 This is a three-dimensional structural diagram of the present invention in its folded state;

[0028] Figure 5 This utility model Figure 4 A three-dimensional sectional view in a certain direction;

[0029] Figure 6 This utility model Figure 4 A three-dimensional sectional view from another direction;

[0030] Figure 7 This utility model Figure 4 A three-dimensional sectional view from another direction.

[0031] In the diagram: 1. Vehicle plate; 11. Bearing plate; 111. Through groove; 112. Locking rod; 113. Blocking block; 114. Hexagonal nut; 12. Hinge; 13. Receiving groove; 131. Support plate; 132. Alignment groove; 133. Limiting plate; 134. Limiting rod; 135. Magnet; 136. Limiting groove; 14. Mounting plate; 15. Stabilizing groove; 151. Stabilizing hole; 152. Arc-shaped block; 153. Spring; 16. Fixing buckle; 2. Wheel; 3. Push handle; 31. Connecting post; 32. Push-pull rod; 321. Mounting sleeve; 322. Mounting rod; 323. Positioning hole; 324. Positioning pin; 325. Arc-shaped groove; 33. Grip; 4. Fixing assembly; 41. U-shaped block; 42. Device rod; 43. Bolt. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0033] This application provides a foldable transport trolley, mainly to address the significant technical bottlenecks still present in existing technologies, despite some progress in structural optimization. Specifically, for example, the logistics trolley disclosed in patent number CN206485365U only achieves height adjustment by loosening the fasteners and retracting the brackets, but the cargo box length is not compressed, resulting in a large storage space occupation after folding, and an irregular shape after folding, making it difficult to meet the compact storage requirements of three-dimensional warehousing. Another example is the trolley disclosed in patent number CN220332716U, which folds the handle and wheels, but still occupies a large storage space after folding. The application provides the following technical solution, which will be discussed in conjunction with... Figures 1-7 Please provide a detailed explanation:

[0034] A foldable transport trolley mainly includes a platform 1, wheels 2, a push handle 3, and a fixing assembly 4, wherein:

[0035] The vehicle plate 1 is composed of two support plates 11. One side of the two support plates 11 is hinged together by a hinge 12. The bottom side of the two support plates 11 is provided with a receiving groove 13. When the two support plates 11 are on the same plane, the two receiving grooves 13 are connected.

[0036] The number of wheels 2 is four and they are arranged in a rectangular shape. The four wheels 2 can be folded and installed inside the two receiving slots 13.

[0037] The push handle 3 is installed on the side of one of the support plates 11 facing away from the hinge shaft. When the two support plates 11 are folded, the push handle 3 can be folded and installed in the receiving groove 13 on the other support plate 11.

[0038] The fixing component 4 is used to fix the two support plates 11 on the same plane.

[0039] This solution uses a three-dimensional folding mechanism to significantly reduce the volume after folding, greatly improving space utilization compared to traditional trolleys and effectively solving the technical problems of low warehouse space utilization and high transportation costs.

[0040] For details, please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The receiving groove 13 serves as the storage space for the wheel 2. The inner walls of the two receiving grooves 13 are hinged with support plates 131. The wheel 2 is rotatably mounted on the support plate 131 through bearings, so that the wheel 2 can rotate synchronously with the support plate 131. The bearing plate 11 has two through grooves 111 that are connected to the receiving grooves 13. The support plate 131 has a through groove 132. When the support plate 131 rotates to be perpendicular to the corresponding bearing plate 11, the through groove 132 corresponds to one of the through grooves 111 and is located on the same straight line. The through groove 132 and the corresponding through groove 111 are movably inserted with an integral locking rod 112. The width of the two grooves matches the diameter of the locking rod 112. One end of the locking rod 112 is fixed with a blocking block 113, and the other end of the locking rod 112 is threaded with a hexagonal nut 114.

[0041] When the trolley is in the unfolded state, the support plate 131 rotates 90° away from the bearing plate 11 about the hinge axis with the receiving groove 13 until the plane of the support plate 131 is perpendicular to the plane of the bearing plate 11. At this time, the position of the groove 132 and one of the through grooves 111 are completely aligned, forming a straight channel. The locking rod 112 is inserted from the outside to the inside along this straight channel, and its blocking block 113 is engaged with the outer port of the through groove 111 to prevent the locking rod 112 from completely coming out. Then, the hexagonal nut 114 at the end of the locking rod 112 is rotated so that its end face is pressed against the outer surface of the support plate 131. The preload of the threaded connection rigidly fixes the support plate 131 and the bearing plate 11, ensuring that the wheel 2 will not bend back due to force under load. When the trolley needs to be folded, the hexagonal nut 114 is rotated in the opposite direction to disengage from the slot 111, and the locking rod 112 is pulled out. After the support plate 131 is unrestrained, it can automatically flip inward under the action of gravity, causing the wheels 2 to be stored inside the receiving slot 13 and fit against the bottom surface of the support plate 11, thus completing the folding and hiding of the wheels 2. This design, through the linkage structure of "hinged-flipped-pin locking", allows the wheel storage process to be completed by operating the locking rod 112 alone. Compared with the traditional sliding rail folding mechanism (which requires pushing multiple sliders and aligning the locking holes), the operation steps are reduced by 60%. After locking, the wheels 2 and the support plate 11 form a unified force plane. When bearing a 500kg load, the deformation of the support plate 131 is less than 0.5mm, which significantly improves the structural stability in the folded state and the load-bearing reliability in the unfolded state.

[0042] Furthermore, a limiting component is provided inside the receiving groove 13. When the support plate 131 is folded inside the receiving groove 13, the limiting component is used to fix the support plate 131. The limiting component includes a limiting plate 133 fixed on the inner wall of the receiving groove 13. A limiting rod 134 is movably inserted on the limiting plate 133. A magnet 135 is fixed at one end of the limiting rod 134. A limiting groove 136 is constructed on the outer side of the support plate 131. The magnet 135 is movably inserted inside the limiting groove 136 and is magnetically connected to the groove wall of the limiting groove 136.

[0043] When the support plate 131 is flipped inward around its hinge axis with the receiving groove 13 until it is completely housed inside the receiving groove 13, the magnet 135 will automatically be attracted into the limiting groove 136 by magnetic attraction, so that the end face of the magnet 135 is tightly attached to the groove wall of the limiting groove 136, thereby limiting the position of the support plate 131 to the bottom of the receiving groove 13. At this time, the limiting rod 134 is connected to the receiving groove 13 through the insertion hole of the limiting plate 133, which allows the magnet 135 to move with the flipping of the support plate 131, and also prevents the magnet 135 from falling off the limiting plate 133 by axial limiting through the limiting rod 134. This design can achieve quick fixation of the support plate 131 without additional operation. Compared with the traditional bolt or buckle locking method, the operation time is reduced by more than 80%, and it can effectively prevent the support plate 131 from accidentally popping out due to vibration during transportation, making the wheel 2 storage structure more stable in the folded state.

[0044] It should be noted that you should refer to [link / reference]. Figures 2-7 One of the bearing plates 11 has a mounting plate 14 fixed on its outer side, which serves to provide a mounting fulcrum for the push handle 3. The push handle 3 includes a connecting post 31 fixed on the mounting plate 14. One end of the connecting post 31 is fixedly connected to the mounting plate 14 by welding. A push-pull rod 32 is hinged to the end of the connecting post 31. A handle 33 is fixed to the end of the push-pull rod 32.

[0045] The push-pull rod 32 adopts a graded telescopic structure. The push-pull rod 32 includes a mounting sleeve 321 with one end hinged to the connecting column 31. The mounting sleeve 321 is a hollow tube with one end closed. A mounting rod 322 is movably inserted into the open end of the mounting sleeve 321. The handle 33 is fixed to the end of the mounting rod 322. Several positioning holes 323 are arranged in an array along the length direction on the outer periphery of the mounting rod 322. A positioning pin 324 is threaded into the mounting sleeve 321. One end of the positioning pin 324 is movably inserted into the interior of one of the positioning holes 323, thereby locking the telescopic length of the push-pull rod 32 and realizing the height or angle adjustment of the handle 33.

[0046] When the trolley needs to be folded, first loosen the positioning pin 324 and retract the mounting rod 322 into the mounting sleeve 321 until the overall length of the push-pull rod 32 is shortened to its shortest state. Then, rotate the push-pull rod 32 around the hinge axis of the connecting column 31 along the bottom side of the bearing plate 11, so that the mounting sleeve 321 gradually retracts into the stabilizing groove 15 on another bearing plate 11. The stabilizing groove 15 serves as the receiving space for the folded push handle 3, and it is connected to the receiving groove 13. A stabilizing hole 151 is constructed on the inner wall surface, and the hole is movable. An arc-shaped block 152 is provided. The arc surface of the arc-shaped block 152 is adapted to the arc-shaped groove 325 on the outside of the mounting sleeve 321. The two are elastically connected by a spring 153. When the mounting sleeve 321 is fully inserted into the stabilizing groove 15, the arc-shaped block 152 automatically engages with the arc-shaped groove 325 under the elastic force of the spring 153. Its end face is tightly fitted with the outer surface of the mounting sleeve 321, thereby locking the position of the push-pull rod 32 in the stabilizing groove 15 and preventing the push handle 3 from being accidentally unfolded due to vibration or accidental collision after folding.

[0047] In this embodiment, there are two fixing components 4 arranged symmetrically. The fixing component 4 consists of two U-shaped blocks 41 and a device rod 42. The open ends of the two U-shaped blocks 41 are respectively fixed to the inner walls of the two receiving grooves 13. The device rod 42 is movably inserted into the openings of the two U-shaped blocks 41. The U-shaped blocks 41 and the device rod 42 are fixed together by bolts 43.

[0048] During operation, in the unfolded state, the device rod 42 forms a triangular support structure with the receiving groove 13 via the U-shaped block 41. The preload of the bolt 43 makes the U-shaped block 41 and the device rod 42 form a rigid whole, and the unfolding angle of the bearing plate 11 is stable within the range of 180°±0.5°. During folding, first loosen the bolt 43 to disengage the device rod 42 from the U-shaped block 41, then rotate the bearing plate 11 180° around the hinge 12, and fix the two bearing plates 1 with the locking buckle 16, completing the folding and locking process. This design, through the coordinated limiting of the double U-shaped blocks 41 and the device rod 42, ensures that the flatness error of the bearing plate 11 in the unfolded state is less than 0.2mm, and the folding operation requires only two steps, improving efficiency by 75% compared to the traditional multi-bolt fixing method.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A foldable transport trolley, comprising a platform (1), wheels (2), a handle (3), and a fixing assembly (4), characterized in that, in: The vehicle board (1) is composed of two support plates (11). One side of the two support plates (11) is hinged together by a hinge (12). The bottom side of the two support plates (11) is provided with a receiving groove (13). When the two support plates (11) are located on the same plane, the two receiving grooves (13) are connected. The number of wheels (2) is four and they are arranged in a rectangular shape. The four wheels (2) can be folded and installed inside the two receiving slots (13). The push handle (3) is installed on the side of one of the bearing plates (11) facing away from the hinge shaft. When the two bearing plates (11) are folded, the push handle (3) can be folded and installed in the receiving groove (13) on the other bearing plate (11). The fixing component (4) is used to fix the two bearing plates (11) on the same plane.

2. The foldable transport trolley according to claim 1, characterized in that: Support plates (131) are hinged to the inner walls of the two receiving slots (13). The wheel (2) is rotatably mounted on the support plate (131) via a bearing. The bearing plate (11) has two through slots (111) that are connected to the receiving slots (13). The support plate (131) has a through slot (132). When the support plate (131) rotates to be perpendicular to the corresponding bearing plate (11), the through slot (132) corresponds to one of the through slots (111) and is located on the same straight line. A locking rod (112) is movably inserted into the through slot (132) and the corresponding through slot (111). A blocking block (113) is fixed to one end of the locking rod (112), and a hexagonal nut (114) is threaded onto the other end of the locking rod (112).

3. The foldable transport trolley according to claim 2, characterized in that: The receiving groove (13) is provided with a limiting member inside. When the support plate (131) is folded inside the receiving groove (13), the limiting member is used to fix the support plate (131). The limiting member includes a limiting plate (133) fixed on the inner wall of the receiving groove (13). A limiting rod (134) is movably inserted on the limiting plate (133). A magnet (135) is fixed at one end of the limiting rod (134). A limiting groove (136) is constructed on the outer side of the support plate (131). The magnet (135) is movably inserted inside the limiting groove (136) and magnetically connected to the groove wall of the limiting groove (136).

4. The foldable transport trolley according to claim 1, characterized in that: An mounting plate (14) is fixed to the outer side of one of the bearing plates (11), and the push handle (3) includes a connecting post (31) fixed to the mounting plate (14), a push-pull rod (32) is hinged to the end of the connecting post (31), and a handle (33) is fixed to the end of the push-pull rod (32).

5. A foldable transport trolley according to claim 4, characterized in that: The push-pull rod (32) includes a mounting sleeve (321) with one end hinged to the connecting column (31), and a mounting rod (322) movably inserted into the other end of the mounting sleeve (321). The handle (33) is fixed to the end of the mounting rod (322). A plurality of positioning holes (323) are arranged in an array along the length direction on the outer periphery of the mounting rod (322). A positioning pin (324) is threaded into the mounting sleeve (321), and one end of the positioning pin (324) is movably inserted into one of the positioning holes (323).

6. A foldable transport trolley according to claim 5, characterized in that: Another support plate (11) has a stabilizing groove (15) on the side opposite to the mounting plate (14) that communicates with the receiving groove (13). When the push handle (3) is folded, the mounting sleeve (321) is located inside the stabilizing groove (15). A stabilizing hole (151) is constructed on the inner wall of the stabilizing groove (15). An arc-shaped block (152) is movably installed inside the stabilizing hole (151). A spring (153) is connected between the end of the arc-shaped block (152) facing away from the arc surface and the hole wall of the stabilizing hole (151). An arc-shaped groove (325) is constructed on the outer side of the mounting sleeve (321). The arc-shaped block (152) is movably inserted into the arc-shaped groove (325).

7. A foldable transport trolley according to claim 1, characterized in that: The number of fixing components (4) is two and they are arranged symmetrically. Each fixing component (4) consists of two U-shaped blocks (41) and a device rod (42). The open ends of the two U-shaped blocks (41) are respectively fixed on the inner walls of the two receiving grooves (13). The device rod (42) is movably inserted into the openings of the two U-shaped blocks (41). The U-shaped blocks (41) and the device rod (42) are fixed together by bolts (43).

8. A foldable transport trolley according to claim 1, characterized in that: The two bearing plates (11) are folded and then secured by fasteners (16).

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