Logistics cargo limiting and fixing device

Abstract

The application discloses a logistics cargo limiting and fixing device and belongs to the technical field of logistics transportation. The limiting and fixing device comprises a first telescopic rod and a second telescopic rod, an adjusting structure arranged on the first telescopic rod and the second telescopic rod, and a pad plate arranged at the two ends of the first telescopic rod and the second telescopic rod respectively. The logistics cargo limiting and fixing device is adapted to different sizes of carriages and supports and limits cargos through the first telescopic rod and the second telescopic rod. The circumferential assembly in the adjusting structure drives the second telescopic rod to rotate circumferentially around the axis of the first telescopic rod. The universal assembly drives the second telescopic rod to overturn and switch between vertical support and horizontal support. The locking piece one locks the rotation position of the circumferential assembly, and the locking piece two locks the overturning angle of the universal assembly. The device can realize cross three-dimensional limiting support or parallel folding storage, improves the supporting rigidity and anti-displacement capacity under the conditions of emergency braking and bumping, and reduces the occupied volume when idle.

Description

Technical Field

[0001] This application relates to the field of logistics and transportation technology, specifically a logistics cargo limiting and fixing device. Background Technology

[0002] During the transportation of goods in logistics, vehicles frequently experience sudden braking, road bumps, and tilting while turning. The goods inside the vehicle are continuously subjected to inertial impact, vertical vibration, and lateral thrust, which can easily cause slippage, tipping, and collisions, resulting in packaging damage and cargo damage, significantly increasing logistics transportation costs.

[0003] Currently, the mainstream cargo restraint methods in the logistics industry include rope binding, wooden wedge clamping, and inflatable airbags. When using rope binding, the ropes are prone to breakage due to long-term tension and friction, resulting in poor restraint reliability. When using wooden wedge clamping, workers need to measure the dimensions of the truck bed and cut the wood on-site. The wood can only be used once, resulting in high material consumption. Moreover, the cutting and wedge clamping process is cumbersome and prolongs the cargo securing time. When using inflatable airbags, the support rigidity depends entirely on the internal air pressure. The rubber airbags are prone to aging and leakage due to long-term vibration and temperature differences. As the air pressure drops, the supporting restraint force weakens. At the same time, burrs in the truck bed and sharp edges of the cargo can easily scratch the airbags, causing the restraint to fail. The airbags only rely on surface friction to adhere to the inner wall of the truck bed, and are prone to sliding after impact. In addition, although some existing fixing equipment has high support strength, the overall structure is too large. When not in use, it cannot be folded and stored, occupying a large amount of storage space in the truck bed. Repeated storage and transfer with the truck are very inconvenient, reducing the practicality and frequency of use of the equipment.

[0004] Therefore, this application provides a logistics cargo limiting and fixing device to solve the above problems. Summary of the Invention

[0005] This application provides a logistics cargo limiting and fixing device, which aims to solve the defects of the three types of limiting methods mentioned in the background art, namely, easy breakage, waste of materials and cumbersome operation, easy leakage, damage and slippage. In addition, conventional fixing equipment also has problems such as not being able to be folded and stored, and inconvenience in storage and transportation.

[0006] To achieve the above objectives, this application provides the following technical solution: a logistics cargo limiting and fixing device, comprising a first telescopic rod and a second telescopic rod for supporting and limiting cargo inside a truck compartment, an adjustment structure disposed on the first telescopic rod and the second telescopic rod for adjusting the direction and orientation of the second telescopic rod, and pads disposed at both ends of the first telescopic rod and the second telescopic rod for bearing pressure. The adjustment structure includes a circumferential assembly disposed on the first telescopic rod for causing the second telescopic rod to rotate circumferentially around the axis of the first telescopic rod; a locking member 1 disposed on the circumferential assembly for locking the relative position of the circumferential assembly and the first telescopic rod; a universal assembly disposed on the circumferential assembly and connected to the second telescopic rod for causing the second telescopic rod to flip to switch between vertical support and horizontal support; and a locking member 2 disposed on the universal assembly for locking the rotation angle of the universal assembly. A corrugated elastic pad adapted to fit the grooves in the inner wall of the truck bed is fixedly installed on the pad plate; the length adaptive extension and retraction is achieved through the first and second telescopic rods to adapt to different sized truck beds and support and limit the cargo. The second telescopic rod rotates circumferentially around the axis of the first telescopic rod by the circumferential component in the adjustment structure, and the universal component drives the second telescopic rod to flip and switch between vertical support and horizontal support. Locking component one locks the rotation position of the circumferential component, and locking component two locks the flip angle of the universal component, so as to realize cross-shaped three-dimensional limiting support or horizontal support. The system can operate in two modes: folding and folding. It improves the support rigidity and anti-displacement capacity under emergency braking and bumpy conditions, while reducing the volume occupied when not in use. Compared with traditional timber that needs to be cut on-site and inflatable airbags that are prone to air leakage and limiting support, it effectively shortens the installation time, reduces labor intensity and material waste, and improves the adaptability and versatility of the carriage and the reusability of the equipment. In addition, by setting corrugated elastic pads on the pad, it avoids metal rods from directly scratching the carriage sheet metal, reduces the risk of collision and damage between goods and the carriage wall, and enhances the support stability.

[0007] Preferably, in order to unify the specifications of the two support rods, the second telescopic rod has the same structural composition as the first telescopic rod; by making the second telescopic rod and the first telescopic rod have the same structure, the parts can be interchanged, reducing the types of molds for parts, reducing production and manufacturing costs, and facilitating spare parts inventory and later maintenance and replacement.

[0008] Preferably, in order to achieve free adjustment of the length of the second or first telescopic rod, the first telescopic rod includes a main rod, a fixed sleeve integrally formed with one end of the main rod, a secondary rod that runs longitudinally through the main rod and the fixed sleeve and is slidably connected within the main rod and the fixed sleeve, and a locking screw that runs laterally through one side of the fixed sleeve and is screwed onto the fixed sleeve to press the secondary rod against the fixed sleeve. The end of the main rod away from the fixed sleeve and the end of the secondary rod away from the fixed sleeve are respectively fixedly connected to the corresponding pad. Through the sliding telescopic cooperation of the main rod and the secondary rod, and the locking screw pressing and positioning, the overall support length of the first or second telescopic rod can be flexibly adjusted to adapt to various specifications of carriages. At the same time, the pads synchronously conform to the carriage wall as the two ends of the rod extend and retract, achieving a uniform distribution of the support force.

[0009] Preferably, in order to improve the length locking strength of the second or first telescopic rod, the side wall of the auxiliary rod is provided with linearly distributed toothed grooves, and a limiting member for engaging with the toothed grooves is fixedly installed at one end of the locking screw near the fixed sleeve. The toothed grooves on the side wall of the auxiliary rod engage with the limiting member at one end of the locking screw to form a toothed mechanical limit, thereby improving the reliability of length locking and preventing support failure due to vibration or heavy load.

[0010] Preferably, in order to achieve circumferential rotation, the circumferential assembly includes a rotating sleeve rotatably fitted onto the main rod of the first telescopic rod, a movable sleeve fitted onto the secondary rod of the first telescopic rod, and a concave frame fixedly connected to one side of the rotating sleeve and the movable sleeve; by fitting the rotating sleeve and the movable sleeve onto the main rod and the secondary rod respectively, and integrally connecting them with the concave frame, the circumferential assembly enables the second telescopic rod to rotate smoothly around the axis of the first telescopic rod, providing basic degrees of freedom for directional adjustment.

[0011] Preferably, to achieve circumferential rotation locking, the locking component includes a second locking screw that extends laterally through one side of the rotating sleeve and is screwed onto the rotating sleeve to press the rotating sleeve against the main rod of the first telescopic rod, and a third locking screw that extends laterally through one side of the movable sleeve and is screwed onto the movable sleeve to press the movable sleeve against the auxiliary rod of the first telescopic rod. By pressing the rotating sleeve with the second locking screw and the movable sleeve with the third locking screw, bidirectional locking of the rotation angle and axial position of the circumferential component can be achieved, ensuring that the position of the second telescopic rod remains constant after rotation and preventing displacement during operation.

[0012] Preferably, in order to achieve cross support and parallel storage, the universal assembly includes a fixed seat fixedly connected to the concave frame, a rotating groove formed on the side of the fixed seat away from the concave frame, and a universal ball rotatably connected in the rotating groove. The end of the universal ball away from the rotating groove is fixedly connected to the fixed sleeve side of the second telescopic rod. The rotating groove of the fixed seat allows the universal ball to rotate freely, driving the second telescopic rod connected to the universal ball to rotate arbitrarily, which can realize the rapid switching between two working states of vertical support and horizontal support, meeting the different working conditions of cross support and parallel storage.

[0013] Preferably, in order to lock the universal ball, the second locking component includes a fourth locking screw and a fifth locking screw that pass through one side of the fixed seat and are screwed to the fixed seat to press the universal ball against the rotating groove. The fourth locking screw and the fifth locking screw are vertically distributed. By bidirectionally pressing the universal ball in the rotating groove with the vertically arranged fourth locking screw and the fifth locking screw, the universal ball is locked with multiple points of contact to eliminate the gap and wobbling of the universal ball, so as to ensure that the second telescopic rod will not deviate in the flip angle under bumpy conditions.

[0014] This logistics cargo limiting and fixing device achieves adaptive length extension and retraction through the first and second telescopic rods to adapt to different sized carriages and support and limit cargo. Relying on the circumferential component in the adjustment structure, the second telescopic rod rotates circumferentially around the axis of the first telescopic rod. With the help of the universal component, the second telescopic rod is driven to flip and switch between vertical support and horizontal support. Locking part one locks the rotation position of the circumferential component, and locking part two locks the flip angle of the universal component. It can realize two working conditions: cross three-dimensional limiting support or parallel folding and storage. It not only improves the support rigidity and anti-displacement ability under sudden braking and bumpy conditions, but also reduces the volume occupied when idle. Compared to traditional timber that requires on-site cutting and inflatable airbags that are prone to leakage, this logistics cargo limiting and fixing device effectively shortens the installation and operation time, reduces labor intensity and material waste, and improves the adaptability and versatility of the carriage and the reusability of the equipment. This cargo limiting and fixing device for logistics uses corrugated elastic pads on the pad plate to prevent the metal rods from directly scraping against the car body sheet metal, reduce the risk of damage from collisions between the cargo and the car wall, and enhance the stability of the support. Attached Figure Description

[0015] Figure 1 A schematic diagram of the application structure of a logistics cargo limiting and fixing device; Figure 2 This is a schematic diagram of a cargo limiting and fixing device for logistics. Figure 3 A schematic diagram of the adjusting structure in a cargo limiting and fixing device for logistics; Figure 4 This is a cross-sectional structural diagram of the first or second telescopic rod in a logistics cargo limiting and fixing device; Figure 5 This is a schematic diagram of the locking screw and the limiting component in a logistics cargo limiting and fixing device; Figure 6 An exploded view of the adjusting structure in a cargo limiting and fixing device for logistics; Figure 7 This is a schematic diagram of the pad in a logistics cargo limiting and fixing device.

[0016] In the picture: 1. First telescopic rod; 11. Main rod; 12. Secondary rod; 13. Fixing sleeve; 14. Locking screw one; 15. Toothed groove; 16. Limiting component; 2. Second telescopic pole; 3. Adjustment structure; 31. Circumferential assembly; 311. Rotating sleeve; 312. Movable sleeve; 313. Concave frame; 32. Locking component one; 321. Locking screw two; 322. Locking screw three; 33. Universal assembly; 331. Fixed base; 332. Rotating groove; 333. Universal ball; 34. Locking component two; 341. Locking screw four; 342. Locking screw five; 4. Pad; 41. Corrugated elastic pad. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] This embodiment provides a logistics cargo limiting and fixing device, such as... Figures 1-7 As shown, the limiting and fixing device includes a first telescopic rod 1 and a second telescopic rod 2 for supporting and limiting the cargo inside the truck bed, an adjustment structure 3 for adjusting the direction and orientation of the second telescopic rod 2, and pads 4 for bearing pressure at both ends of the first telescopic rod 1 and the second telescopic rod 2 respectively. The adjustment structure 3 includes a circumferential assembly 31 for rotating the second telescopic rod 2 around the axis of the first telescopic rod 1, a locking member 32 for locking the relative position of the circumferential assembly 31 and the first telescopic rod 1, a universal assembly 33 for flipping the second telescopic rod 2 to switch between vertical support and horizontal support, and a locking member 34 for locking the rotation angle of the universal assembly 33. A corrugated elastic pad 41 for fitting into the groove of the inner wall of the truck bed is fixedly installed on the pad 4.

[0019] In use, first, based on the actual height and width dimensions inside the truck bed, pull and adjust the extension lengths of the first telescopic rod 1 and the second telescopic rod 2 to complete a rough adjustment, ensuring that the overall length of the first telescopic rod 1 matches the vertical height of the truck bed and the overall length of the second telescopic rod 2 matches the horizontal width of the truck bed. Then, initially place the end plates 4 of the first telescopic rod 1 and the end plates 4 of the second telescopic rod 2 close to the corresponding inner walls of the truck bed. Next, operate the circumferential component 31 inside the adjustment structure 3 to drive the second telescopic rod 2 to rotate circumferentially around the axis of the first telescopic rod 1, adjusting the second telescopic rod 2 to the required circumferential position. Once the circumferential position of the second telescopic rod 2 is adjusted to the correct position, adjust the connection on the circumferential component 31... The universal joint 33 utilizes its rotational freedom to drive the second telescopic rod 2 to flip and swing. If three-dimensional positioning of the goods is required, the second telescopic rod 2 is flipped to a horizontal position perpendicular to the first telescopic rod 1, so that the two rods are arranged in a cross shape, supporting the upper and lower inner walls and the left and right side walls of the carriage respectively. If the device is not in use and needs to be stored, the second telescopic rod 2 is flipped to a position parallel to the first telescopic rod 1. After the circumferential orientation and flipping posture of the second telescopic rod 2 are fully adjusted, the locking part 1 32 and the locking part 2 34 are tightened respectively. The locking part 1 32 locks the circumferential component 31 relative to the first telescopic rod 1. The rotation position of rod 1 locks the internal rotation angle of the universal assembly 33 with locking part 2 34, preventing the orientation and angle of the second telescopic rod 2 from shifting on its own during vehicle vibration. Then, the extension lengths of the first telescopic rod 1 and the second telescopic rod 2 are finely adjusted to push each pad 4 tightly against the inner wall of the carriage and lock the length of the two telescopic rods. At this time, the corrugated elastic pad 41 fixed on the outside of the pad 4 is compressed and undergoes elastic deformation. The corrugated structure on the surface of the corrugated elastic pad 41 is embedded in the groove of the inner wall of the carriage to form a concave-convex interlocking structure. It not only relies on mechanical locking to restrict the pad 4 from sliding tangentially along the carriage wall, but also absorbs the vibration impact generated by the bumps of the vehicle through its own elasticity, thus providing a flexible effect. Contact isolation metal pad 4, the rod body directly rubs against the car body sheet metal to prevent the paint of the car body from being scratched and the cargo from being bumped and damaged. After all locking and fixing is completed, the first telescopic rod 1 and the second telescopic rod 2, which are arranged in a cross shape, form an integrated rigid support frame by means of the adjustment structure 3. When the vehicle brakes suddenly, the horizontally arranged second telescopic rod 2 bears the inertial impact force of the cargo forward. When the road surface is bumpy, the vertically arranged first telescopic rod 1 restrains the cargo from bouncing up and down. When the vehicle turns and tilts, the first telescopic rod 1 and the second telescopic rod 2 work together to counteract the lateral displacement force of the cargo. The cargo is three-dimensionally limited from multiple dimensions such as up and down, left and right, and front and back, and the stable support rigidity and anti-displacement ability are maintained throughout the process.When disassembly and storage are required after transportation, first release the length locks of the first telescopic rod 1 and the second telescopic rod 2 and retract the rods to their shortest size. Then, release the second locking piece 34 to unlock the universal joint 33, and release the first locking piece 32 to unlock the circumferential joint 31. Use the universal joint 33 to flip the second telescopic rod 2 to a position parallel to the first telescopic rod 1. Then, operate the circumferential joint 31 to rotate so that the second telescopic rod 2 is completely flush against and close to the outside of the first telescopic rod 1. Finally, remove the entire device from the vehicle compartment, reducing the overall space occupied by the device and facilitating on-board storage and bulk transportation.

[0020] In order to unify the specifications of the two support rods, the second telescopic rod 2 has the same structural composition as the first telescopic rod 1. By making the second telescopic rod 2 and the first telescopic rod 1 have the same structure, the parts can be interchanged, reducing the types of molds for parts, reducing production and manufacturing costs, and facilitating spare parts inventory and later maintenance and replacement.

[0021] Specifically, the first telescopic rod 1 includes a main rod 11, a fixed sleeve 13 integrally formed with one end of the main rod 11, a secondary rod 12 that runs longitudinally through the main rod 11 and the fixed sleeve 13 and is slidably connected within the main rod 11 and the fixed sleeve 13, and a locking screw 14 that runs laterally through one side of the fixed sleeve 13 and is screwed onto the fixed sleeve 13 to press the secondary rod 12 against the fixed sleeve 13. The end of the main rod 11 away from the fixed sleeve 13 and the end of the secondary rod 12 away from the fixed sleeve 13 are respectively fixedly connected to the corresponding pad 4. In addition, the side wall of the secondary rod 12 is provided with linearly distributed toothed grooves 15, and the end of the locking screw 14 near the fixed sleeve 13 is fixedly installed with a limiting member 16 for engaging in the toothed grooves 15.

[0022] Since the second telescopic rod 2 and the first telescopic rod 1 have the same structure, taking the first telescopic rod 1 as an example, when the support length needs to be adjusted, the operator first holds the auxiliary rod 12 and applies axial tension or thrust, causing the auxiliary rod 12 to slide longitudinally relative to the main rod 11 and the fixed sleeve 13 along its own axis. During this process, the auxiliary rod 12 always extends longitudinally through the main rod 11 and the fixed sleeve 13 and maintains a sliding fit until the auxiliary rod 12 extends or retracts to the target length, so that the pad 4 fixedly connected to the end of the main rod 11 away from the fixed sleeve 13 and the pad 4 fixedly connected to the end of the auxiliary rod 12 away from the fixed sleeve 13 are roughly in contact with the corresponding positions on the inner wall of the carriage, completing the coarse adjustment and preliminary positioning of the length. Then, the operator tightens the locking screw 14 that extends laterally through one side of the fixed sleeve 13 and is screwed to it, so that the locking screw 14 is pushed radially into the fixed sleeve 13. At this time, the fixed installation is close to the locking screw 14. The limiting member 16 at one end of the fixed sleeve 13 moves synchronously with the locking screw 14 and engages in the corresponding toothed groove 15 on the side wall of the auxiliary rod 12, forming a toothed mechanical limiting fit between the limiting member 16 and the toothed groove 15. This reliably locks the auxiliary rod 12 axially within the main rod 11 and the fixed sleeve 13, effectively preventing the auxiliary rod 12 from sliding axially under transport vibration or cargo impact, thus preventing support failure. When it is necessary to release the lock for secondary length adjustment or disassembly and storage, simply loosen the locking screw 14 in the opposite direction to allow the limiting member 16 to disengage from the toothed groove 15, thereby restoring the free sliding state of the auxiliary rod 12 relative to the main rod 11 and enabling further length adjustment. The second telescopic rod 2 adopts the same structure of main rod 11, fixed sleeve 13, auxiliary rod 12, locking screw 14, toothed groove 15, limiting member 16, and pad 4. The adjustment, locking, and unlocking processes are completely interchangeable with those of the first telescopic rod 1.

[0023] Furthermore, the circumferential assembly 31 includes a rotating sleeve 311 rotatably sleeved on the main rod 11 of the first telescopic rod 1, a movable sleeve 312 sleeved on the secondary rod 12 of the first telescopic rod 1, and a concave frame 313 fixedly connected to one side of the rotating sleeve 311 and the movable sleeve 312.

[0024] When the orientation of the second telescopic rod 2 needs to be adjusted, the operator first holds the concave frame 313 and applies circumferential rotational force according to the target circumferential orientation of the second telescopic rod 2. Since the rotating sleeve 311 is rotatably sleeved on the main rod 11 of the first telescopic rod 1, and the movable sleeve 312 is sleeved on the secondary rod 12 of the first telescopic rod 1, and the concave frame 313 is fixedly connected to the same side of the rotating sleeve 311 and the movable sleeve 312, the rotating sleeve 311, the movable sleeve 312 and the concave frame 313 form a rigidly connected whole. When the operator moves the concave frame 313, the rotating sleeve 311 rotates freely around the axis of the main rod 11, and at the same time, the movable sleeve 312 rotates synchronously with the concave frame 313 around the same axis on the secondary rod 12. During the rotation, the movable sleeve 312 remains sleeved. In the state of the auxiliary rod 12, it ensures that the circumferential assembly 31 can rotate smoothly without interference regardless of the extension length of the auxiliary rod 12. This drives the entire universal assembly 33, which is fixedly connected to the concave frame 313, and the second telescopic rod 2 to rotate together around the axis of the first telescopic rod 1 to the target circumferential position. After the circumferential position is adjusted to the correct position, the rotating sleeve 311 and the movable sleeve 312 are locked and fixed by the locking member 32, so that the rotating sleeve 311 is tightly held on the main rod 11 and the movable sleeve 312 is tightly held on the auxiliary rod 12. This locks the rotation angle and axial position of the circumferential assembly 31 at the same time, ensuring that the second telescopic rod 2 will not deflect unexpectedly around the axis of the first telescopic rod 1 during subsequent transportation, providing a stable and reliable circumferential attitude foundation for the second telescopic rod 2.

[0025] Furthermore, the locking component 32 includes a second locking screw 321 that extends laterally through one side of the rotating sleeve 311 and is screwed onto the rotating sleeve 311 for pressing the rotating sleeve 311 against the main rod 11 of the first telescopic rod 1, and a third locking screw 322 that extends laterally through one side of the movable sleeve 312 and is screwed onto the movable sleeve 312 for pressing the movable sleeve 312 against the auxiliary rod 12 of the first telescopic rod 1.

[0026] After the operator adjusts the second telescopic rod 2 to the target circumferential position by rotating it around the axis of the first telescopic rod 1 using the circumferential assembly 31, it is necessary to lock this circumferential position to prevent deflection during transportation. At this time, the operator rotates the second locking screw 321 and the third locking screw 322 respectively. The second locking screw 321 extends laterally through one side of the rotating sleeve 311 and is screwed onto the rotating sleeve 311. When the second locking screw 321 is tightened, the second locking screw 321 rotates radially towards the rotating sleeve 311. The sleeve 311 is pushed inward until its end is tightly pressed against the outer wall of the main rod 11 of the first telescopic rod 1. The self-locking force of the threads clamps the rotating sleeve 311 onto the main rod 11, thus preventing further circumferential rotation of the rotating sleeve 311 relative to the main rod 11. Simultaneously, the locking screw 322 is tightened, causing it to be pushed radially into the movable sleeve 312 until its end is tightly pressed against the outer wall of the secondary rod 12 of the first telescopic rod 1. The self-locking force of the threads clamps the movable sleeve 312 onto the secondary rod 12. 2. This prevents the movable sleeve 312 from rotating or sliding axially relative to the auxiliary rod 12. Since the rotating sleeve 311 and the movable sleeve 312 are fixedly connected as a rigid whole by the concave frame 313, after the rotating sleeve 311 and the movable sleeve 312 are locked by the locking screws 321 and 322 respectively, the rotation angle and axial position of the entire circumferential assembly 31 are locked in both directions, realizing the complete fixation of the relative position between the circumferential assembly 31 and the first telescopic rod 1, ensuring that the second telescopic rod 2 always maintains the set circumferential orientation without deflection under the subsequent transportation vibration and cargo impact. When it is necessary to unlock to readjust the circumferential orientation or disassemble and store, simply loosen the locking screws 321 and 322 in the opposite direction, so that the ends of the two are separated from the outer walls of the main rod 11 and the auxiliary rod 12 respectively, and the free rotation of the rotating sleeve 311 relative to the main rod 11 and the free sliding of the movable sleeve 312 relative to the auxiliary rod 12 can be restored, providing a flexible operating basis for the next angle adjustment.

[0027] Furthermore, the universal assembly 33 includes a fixed seat 331 fixedly connected to the concave frame 313, a rotating groove 332 opened on the side of the fixed seat 331 away from the concave frame 313, and a universal ball 333 rotatably connected in the rotating groove 332. The end of the universal ball 333 away from the rotating groove 332 is fixedly connected to the fixed sleeve 13 side of the second telescopic rod 2.

[0028] When it is necessary to switch the support direction of the second telescopic rod 2, the operator directly grasps the second telescopic rod 2 and applies a flipping force. Since one side of the fixed sleeve 13 of the second telescopic rod 2 is fixedly connected to the end of the universal ball 333 away from the rotating groove 332, and the universal ball 333 is rotatably connected in the rotating groove 332 opened on the side of the fixed seat 331 away from the concave frame 313, and the fixed seat 331 is fixedly connected to the concave frame 313, the external force on the second telescopic rod 2 is directly transmitted to the universal ball 333 through the fixed sleeve 13, driving the universal ball 333 to rotate freely in any direction within the rotating groove 332. During the rotation of the universal ball 333, the rotating groove 332 provides the universal ball 333 with a space to accommodate it and rotational constraints, so that the universal ball 333 can roll or slide smoothly within the rotating groove 332 without coming out of the rotating groove 332, thereby ensuring that the second telescopic rod 2 can perform multi-angle flipping and swinging in space. When the operator flips the second telescopic rod 2 to a horizontal position perpendicular to the first telescopic rod 1, the universal ball 333 rotates to the corresponding angle in the rotation groove 332, and the second telescopic rod 2 switches to a horizontal support posture, forming a cross-shaped three-dimensional support structure with the vertically arranged first telescopic rod 1, achieving bidirectional support and limitation for the left and right walls and the upper and lower walls of the carriage. When the operator flips the second telescopic rod 2 to a position parallel to the first telescopic rod 1, the universal ball 333 rotates to another corresponding angle in the rotation groove 332, and the second telescopic rod 2 switches to a storage posture, facilitating folding and storage when the device is not in use. Afterwards, the universal ball 333 can be locked and fixed by the locking component 34 to ensure that the second telescopic rod 2 can maintain a stable posture without accidental deflection after being adjusted to the target support angle, providing a reliable motion basis and posture maintenance prerequisite for flexible switching between the two working conditions of cross-shaped three-dimensional support or parallel storage.

[0029] It is worth noting that the locking component 2 34 includes a locking screw 4 341 and a locking screw 5 342 that pass through one side of the fixed seat 331 and are screwed to the fixed seat 331 to press the universal ball 333 against the rotating groove 332. The locking screw 4 341 and the locking screw 5 342 are vertically distributed.

[0030] After the operator flips the second telescopic rod 2 to the target support angle using the universal joint 33, the flipped angle needs to be locked to prevent posture deviation during transportation. At this time, the operator rotates the locking screw 4 341 and the locking screw 5 342 respectively. The locking screw 4 341 passes through one side of the fixed seat 331 and is screwed to the fixed seat 331, and the locking screw 5 342 passes through the other side of the fixed seat 331 and is screwed to the fixed seat 331. The locking screws 4 341 and 5 342 are perpendicular to each other in space. When the locking screw 4 341 is tightened, the locking screw 4 341 is pushed into the fixed seat 331 along its axial direction, and its end presses against the surface of the universal ball 333 in the rotating groove 332 from the first direction. At the same time, when the locking screw 5 342 is tightened, the locking screw 5 342 is pushed into the fixed seat 331 along its axial direction, and its end presses against the surface of the universal ball 333 in the rotating groove 332 from the first direction. The second direction of the straight rod presses against the surface of the universal ball 333, thereby applying pressure to the universal ball 333 from different directions simultaneously through two mutually perpendicular locking screws. This secures the universal ball 333 in multiple directions within the rotating groove 332, preventing it from continuing to rotate or causing gaps or wobbling. This achieves complete locking of the universal ball 333's rotation angle, ensuring that the second telescopic rod 2, which is fixedly connected to the universal ball 333, maintains its set flipping posture without shifting under bumpy and vibrating conditions. When it is necessary to readjust the support angle of the second telescopic rod 2 or to disassemble and store it, simply unscrew the fourth locking screw 341 and the fifth locking screw 342 in the opposite direction. This allows the ends of both screws to exit from the surface of the universal ball 333 and disengage, releasing the pressure on the universal ball 333 and restoring its free rotation within the rotating groove 332, providing a basis for the next angle adjustment.

[0031] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A cargo limiting and fixing device for logistics, characterized in that: It includes a first telescopic rod (1) and a second telescopic rod (2) for supporting and limiting the cargo inside the truck bed, an adjustment structure (3) set on the first telescopic rod (1) and the second telescopic rod (2) for adjusting the direction of the second telescopic rod (2), and pads (4) set at both ends of the first telescopic rod (1) and the second telescopic rod (2) for bearing pressure. The adjustment structure (3) includes a circumferential assembly (31) disposed on the first telescopic rod (1) for causing the second telescopic rod (2) to rotate circumferentially around the axis of the first telescopic rod (1), a locking member (32) disposed on the circumferential assembly (31) for locking the relative position of the circumferential assembly (31) and the first telescopic rod (1), a universal assembly (33) disposed on the circumferential assembly (31) and connected to the second telescopic rod (2) for causing the second telescopic rod (2) to flip to switch between vertical support and horizontal support, and a locking member (34) disposed on the universal assembly (33) for locking the rotation angle of the universal assembly (33). A corrugated elastic pad (41) for fitting into the groove of the inner wall of the truck compartment is fixedly installed on the pad plate (4).

2. The logistics cargo limiting and fixing device according to claim 1, characterized in that: The second telescopic rod (2) has the same structural composition as the first telescopic rod (1).

3. The logistics cargo limiting and fixing device according to claim 2, characterized in that: The first telescopic rod (1) includes a main rod (11), a fixed sleeve (13) integrally formed with one end of the main rod (11), a secondary rod (12) that runs longitudinally through the main rod (11) and the fixed sleeve (13) and is slidably connected within the main rod (11) and the fixed sleeve (13), and a locking screw (14) that runs laterally through one side of the fixed sleeve (13) and is screwed onto the fixed sleeve (13) for pressing the secondary rod (12) against the fixed sleeve (13). The end of the main rod (11) away from the fixed sleeve (13) and the end of the secondary rod (12) away from the fixed sleeve (13) are respectively fixedly connected to the corresponding pad (4).

4. The logistics cargo limiting and fixing device according to claim 3, characterized in that: The side wall of the auxiliary rod (12) is provided with linearly distributed toothed grooves (15), and the end of the locking screw (14) near the fixed sleeve (13) is fixedly installed with a limiting member (16) for engaging in the toothed grooves (15).

5. The logistics cargo limiting and fixing device according to claim 3, characterized in that: The circumferential assembly (31) includes a rotating sleeve (311) rotatably sleeved on the main rod (11) of the first telescopic rod (1), a movable sleeve (312) sleeved on the secondary rod (12) of the first telescopic rod (1), and a concave frame (313) fixedly connected to one side of the rotating sleeve (311) and the movable sleeve (312).

6. The logistics cargo limiting and fixing device according to claim 5, characterized in that: The locking component one (32) includes a second locking screw (321) that extends laterally through one side of the rotating sleeve (311) and is screwed onto the rotating sleeve (311) for pressing the rotating sleeve (311) against the main rod (11) of the first telescopic rod (1), and a third locking screw (322) that extends laterally through one side of the movable sleeve (312) and is screwed onto the movable sleeve (312) for pressing the movable sleeve (312) against the auxiliary rod (12) of the first telescopic rod (1).

7. The logistics cargo limiting and fixing device according to claim 5, characterized in that: The universal assembly (33) includes a fixed seat (331) fixedly connected to the concave frame (313), a rotating groove (332) opened on the side of the fixed seat (331) away from the concave frame (313), and a universal ball (333) rotatably connected in the rotating groove (332). One end of the universal ball (333) away from the rotating groove (332) is fixedly connected to one side of the fixed sleeve (13) of the second telescopic rod (2).

8. The logistics cargo limiting and fixing device according to claim 7, characterized in that: The second locking component (34) includes a fourth locking screw (341) and a fifth locking screw (342) that pass through one side of the fixed seat (331) and are screwed to the fixed seat (331) to press the universal ball (333) against the rotating groove (332). The fourth locking screw (341) and the fifth locking screw (342) are vertically distributed.

Images