Automobile parts high stable unloading platform

Abstract

This invention relates to the field of unloading platform technology and discloses a high-level stable unloading platform for automotive parts, including a machine base, two lifting masts, and a lifting platform. Each lifting mast includes multiple support sleeves, with limit grooves on both sides of one end of each support sleeve. Support sleeves are fixedly connected to both sides of the support sleeve near the limit groove, and support bars are fixedly connected to both sides of the inner wall of the support sleeve away from the limit groove. Multiple support ball bearings are rotatably installed inside the support bars. This invention's lifting mast adopts a multi-section telescopic support sleeve structure, combined with hydraulic drive to achieve precise height adjustment, adapting to the height of different truck bodies. The compression of the extrusion wheels eliminates lateral gaps, and the elastic traction rope ensures that the center of gravity of the support sleeve remains vertically downward, effectively preventing lateral swaying and offset during lifting, improving the stability of the lifting platform, and ensuring high safety.

Description

Technical Field

[0001] This invention relates to the field of unloading platform technology, specifically a high-level stable unloading platform for automotive parts. Background Technology

[0002] In automotive parts logistics unloading scenarios, the floor of large trucks and container trucks can be 1.5–1.8 meters above the ground, while the unloading height of automated warehouse platforms and second-floor workshops can reach 1.8–2.5 meters, which are typical high-level unloading conditions. Existing unloading methods have obvious technical defects and are difficult to adapt to the needs of efficient, damage-free, and safe unloading of automotive parts.

[0003] Currently, the mainstream unloading methods include manual handling, fixed chutes, and ordinary lifting platforms. Manual handling is labor-intensive, and high-level operations are prone to falls and injuries. Parts are also easily scratched and deformed by impacts, especially precision sheet metal parts and exterior components, resulting in a high scrap rate. Fixed chutes have no adjustable slope, making them unsuitable for different truck heights and part sizes. Large drops cause severe impacts, while small drops can lead to jamming, resulting in poor versatility. Ordinary lifting platforms only have height adjustment functions, and when raised to a high height or under rated load, they are prone to lateral swaying and swinging, affecting operational accuracy and safety. Therefore, developing an unloading platform that can achieve stable unloading at heights and improve operational safety and efficiency has become a pressing technical problem in the current automotive parts manufacturing industry. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a high-altitude stable unloading platform for automotive parts. It is adaptable to unloading in different scenarios, improves the stability of the lifting platform, and prevents accidental falls. It also solves the problem that long-term use can lead to wear and tear, resulting in increased guide clearance and further aggravated shaking, which not only affects the efficiency of high-altitude operations but may also cause safety hazards.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A high-level stable unloading platform for automotive parts includes a machine base, two lifting masts and a lifting platform. A conveyor with a receiving hopper is fixedly connected to the side of the machine base, and a climbing ladder is fixedly connected to the side of the machine base for conveying automotive parts to the bottom. The lifting mast includes multiple nested and telescopic support frames, and support sleeves are fixedly connected to both sides of one end of each support frame. The support sleeve is equipped with a driveable and deployable extrusion wheel, which presses outward against the inner wall of the adjacent support sleeve to eliminate lateral gaps. The bottom of the support frame is connected to an elastic traction rope via a tension sensor, and the lower end of the elastic traction rope is fixed to the machine base. A self-locking device is fixed at the lower end of the support frame. The self-locking device is electrically linked to the tension sensor and is used to automatically lock the support frame in case of abnormal lifting.

[0006] Preferably, the two lifting masts are fixedly installed inside the machine base at both ends. Each support frame has a limiting groove on both sides of one end. Support bars are fixedly connected to both sides of the inner wall of the end of the support frame away from the limiting groove. Multiple support balls are rotatably installed inside the support bars. The support balls provide rolling friction and support for the sliding between the two support frames, ensuring stability during the lifting process. The support sleeve includes a square tube with a side groove on its side. A fixed rail is fixedly connected to one side of the inner wall of the square tube, and a sliding sleeve plate is slidably connected to the outer surface of the fixed rail. Multiple connecting frames are fixedly connected to the side of the sliding sleeve plate. A rotating arm is rotatably mounted on the upper end of each connecting frame. Multiple top frames corresponding to the connecting frames are fixedly connected to the inner wall of the square tube. A support rod is rotatably mounted on the upper end of each top frame. The end of the support rod away from the top frame is rotatably connected to an extrusion wheel, and the lower end of the support rod is rotatably connected to one end of the rotating arm. The extrusion wheels at both ends expand outward through the movement of the sliding sleeve plate and press tightly against the inner wall of adjacent support frames, making the two support frames fit closely together. The sliding of the extrusion wheels provides support between the multiple support frames, preventing lateral swaying between the multiple support frames.

[0007] Preferably, the bottom of the support frame is provided with a fixed frame, and a tension sensor is fixedly connected inside the fixed frame. An elastic traction rope is fixedly connected to the bottom of the tension sensor. The bottom of the elastic traction rope is fixedly connected to the machine base. The tension sensor is electrically connected to the push cylinder.

[0008] Preferably, a support roller is rotatably mounted on the upper end of the support sleeve, a top plate is fixedly connected to the upper end inside the support sleeve, a connecting chain is movably sleeved on the outer surface of the support roller, one end of the connecting chain is fixedly connected to the top plate inside the adjacent support sleeve on one side, and the other end of the connecting chain is fixedly connected to the lower end of the support sleeve inside the adjacent support sleeve on the other side, so that multiple support sleeves can be raised and lowered sequentially through the connecting chain.

[0009] Preferably, a self-locking device is fixedly connected to the lower end of the support frame. The self-locking device includes an electromagnetic self-locking frame, a pushing component is movably installed inside the electromagnetic self-locking frame, and a friction self-locking component is detachably installed at the bottom of the electromagnetic self-locking frame.

[0010] Preferably, the electromagnetic self-locking frame includes a fixed cover, a controller is fixedly connected to the side of the fixed cover, movable latches are movably sleeved at both ends of the fixed cover, limit rods are fixedly connected to the sides of the movable latches at both ends, and locking blocks are movably sleeved on the upper and lower sides of the opposite ends of the movable latches at both ends. The side of the locking block near the fixed cover is inclined, and the opposite ends of the movable latches at both ends are inclined. Electromagnets are fixedly connected to the upper and lower ends of the fixed cover near the inside of the controller, and a return spring is provided between the movable latches and the fixed cover.

[0011] Preferably, the pushing component includes a movable frame, a pressing block is fixedly connected to the top of the movable frame, a limiting frame is fixedly connected to the side of the movable frame, a movable frame is fixedly connected to the side of the movable frame away from the limiting frame, and magnet blocks are fixedly connected to both the upper and lower ends of the movable frame.

[0012] Preferably, the lower end of the extrusion block is provided with inclined surfaces on both sides corresponding to the side of the movable latch, the upper and lower sides of both ends of the movable frame and the upper and lower sides inside the fixed cover are provided with support springs, the upper and lower ends of the movable frame are fixedly connected with magnet blocks, and the top of the limiting frame is provided with inclined surfaces in opposite directions on both sides.

[0013] Preferably, the movable frame is movably sleeved inside the fixed cover, the upper and lower magnetic blocks are magnetically attracted to the electromagnets at the upper and lower ends respectively, the squeezing block is movably sleeved on the upper part of the fixed cover and located between the movable latches on both sides, and the limiting frame is movably sleeved on the lower end of the fixed cover and movably sleeved on the outer surface of the limiting rods at both ends.

[0014] Preferably, the friction self-locking assembly includes a bottom frame, with limiting sleeves fixedly connected to both ends of the top of the bottom frame, and movable rods movably sleeved at both ends of the bottom frame. A side frame with a friction plate is fixedly connected to the opposite end of each movable rod. A slot is provided on the side of the side frame. The limiting sleeve is embedded in the lower end of the fixed cover and sleeved on the outer surface of the movable bolt. The locking block is engaged inside the slot.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a high-level stable unloading platform for automotive parts, which has the following beneficial effects: 1. This automotive parts high-level stable unloading platform features a multi-section support frame telescopic structure for the lifting mast, which, combined with hydraulic drive, enables precise height adjustment. It can adapt to the height of truck beds of different specifications, as well as different operating scenarios such as automated warehouse platforms and unloading ports on the second floor of workshops. It can achieve precise docking with truck beds and conveyors without the need for frequent manual adjustments, solving the problem of poor versatility of existing fixed chutes and ordinary lifting platforms, and improving the unloading adaptability in different scenarios.

[0016] 2. This high-level stable unloading platform for automotive parts utilizes the synergistic action of the supporting balls and extrusion wheels in the lifting mast to provide rolling friction support for the sliding between the support sleeves. Simultaneously, the close contact and compression of the extrusion wheels eliminates lateral gaps, and the elastic traction rope ensures that the center of gravity of the support sleeve remains vertically downward, effectively preventing lateral swaying and offset during lifting. This improves the stability and safety of the lifting platform, solving the problems of jamming and shaking during unloading in existing equipment, which can cause accumulated automotive parts to fall. It is particularly suitable for the non-destructive unloading requirements of precision automotive parts.

[0017] 3. This high-level stable unloading platform for automotive parts is equipped with a tension sensor to collect the tension of the elastic traction rope in real time. It can quickly identify abnormal situations such as excessive rope slippage and falling momentum, triggering the self-locking device to lock the support frame in time to prevent the lifting platform from falling unexpectedly. After the lifting stops, the self-locking automatically activates to further improve longitudinal stability and avoid accidents such as personnel falling or parts falling due to platform shaking. The friction self-locking component increases the contact friction force through friction plates to enhance the locking effect. At the same time, it has a quick disassembly and replacement structure to ensure that the safety protection function continues to be effective, solving the pain point of prominent safety hazards in existing high-level unloading methods.

[0018] 4. This high-level stable unloading platform for automotive parts achieves real-time monitoring and adaptive adjustment of the lifting status through the electrical linkage of a tension sensor, a push cylinder, and an electromagnet. When the support frame rises, it automatically controls the extrusion rollers to unfold and fit. In case of abnormality, it automatically triggers self-locking and locks automatically after stopping. No manual intervention is required throughout the process, which improves the accuracy and reliability of unloading operations and avoids safety accidents and parts damage caused by human error. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the lifting mast structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the support sleeve structure of the present invention.

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at point A in the diagram.

[0023] Figure 5 This is a schematic diagram of the support sleeve structure of the present invention.

[0024] Figure 6 For the present invention Figure 5 The structural diagram at point B in the diagram.

[0025] Figure 7 This is an exploded view of the self-locking device of the present invention.

[0026] Figure 8 This is a schematic diagram of the electromagnetic self-locking frame structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the internal structure of the electromagnetic self-locking frame of the present invention.

[0028] Figure 10 This is a cross-sectional structural diagram of the self-locking device of the present invention.

[0029] Figure 11 This is a schematic diagram of the pushing component structure of the present invention.

[0030] Figure 12 This is a schematic diagram of the friction self-locking assembly structure of the present invention.

[0031] In the diagram: 1. Machine base; 2. Lifting mast; 3. Lifting platform; 4. Climbing ladder; 5. Conveyor; 7. Self-locking device; 21. Support sleeve; 22. Limiting groove; 23. Support sleeve; 24. Support roller; 25. Top plate; 26. Support bar; 27. Support ball bearing; 28. Connecting chain; 29. ​​Push cylinder; 210. Connecting plate; 211. Elastic traction rope; 212. Tension sensor; 231. Square tube; 232. Side groove; 233. Fixed track; 234. Sliding sleeve; 235. Connecting frame; 236. Top frame ; 237, Support rod; 238, Extrusion wheel; 239, Rotating arm; 71, Electromagnetic self-locking frame; 72, Pushing assembly; 73, Friction self-locking assembly; 711, Fixed cover; 712, Moving bolt; 713, Limiting rod; 714, Locking block; 715, Electromagnet; 716, Controller; 721, Moving frame; 722, Extrusion block; 723, Limiting frame; 724, Movable frame; 725, Supporting spring; 726, Magnet block; 731, Bottom frame; 732, Limiting sleeve; 733, Movable rod; 734, Side frame; 735, Slot. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: This embodiment provides a high-level stable unloading platform for automotive parts, which has the following technical features.

[0034] Please see Figures 1-6The system includes a machine base 1, two lifting masts 2, and a lifting platform 3. The two lifting masts 2 are fixedly installed at both ends inside the machine base 1. Each lifting mast 2 includes multiple support sleeves 21. Limiting grooves 22 are provided on both sides of one end of the multiple support sleeves 21. Support sleeves 23 are fixedly connected to both sides of the support sleeves 21 near the limiting grooves 22. Support bars 26 are fixedly connected to both sides of the inner wall of the support sleeves 21 away from the limiting grooves 22. Multiple support balls 27 are rotatably installed inside the support bars 26. The support balls 27 provide rolling friction and support for the sliding between the two support sleeves 21, ensuring the stability during the lifting process. A conveyor 5 with a receiving hopper is fixedly connected to the side of the machine base 1, and a climbing ladder 4 is fixedly connected to the side of the machine base 1 for conveying automotive parts to the bottom.

[0035] In this embodiment, as Figures 4-6 As shown, the support sleeve 23 includes a square tube 231. A side groove 232 is formed on the side of the square tube 231. A fixed rail 233 is fixedly connected to one side of the inner wall of the square tube 231. A sliding sleeve plate 234 is slidably connected to the outer surface of the fixed rail 233. Multiple connecting brackets 235 are fixedly connected to the side of the sliding sleeve plate 234. A rotating arm 239 is rotatably mounted on the upper end of each connecting bracket 235. Multiple top brackets 236 corresponding to the connecting brackets 235 are fixedly connected to the inner wall of the square tube 231. The upper end of each top bracket 236 rotates... A support rod 237 is rotatably installed. An extrusion wheel 238 is rotatably installed at the end of the support rod 237 away from the top frame 236. The lower end of the support rod 237 is rotatably connected to one end of the rotating arm 239. The extrusion wheels 238 at both ends expand outward through the movement of the sliding sleeve plate 234 and press tightly against the inner wall of the adjacent support sleeve 21, so that the two support sleeves 21 fit tightly together. The sliding of the extrusion wheel 238 provides support for multiple support sleeves 21 and prevents lateral swaying between multiple support sleeves 21.

[0036] In this embodiment, the lifting mast 2 is powered by a hydraulic system (not shown in the figure; this structure is the same as the mast assembly in the existing single-mast lift, and will not be elaborated further here). The motor drives the hydraulic pump to generate high-pressure oil, which enters the built-in telescopic cylinder through the reversing valve, hydraulic lock, and balance valve, pushing the piston rod to extend and drive the lifting mast 2 to extend and push the lifting platform 3 to rise smoothly. At this time, the push cylinder 29 controls the connecting plate 210 to drive the sliding sleeve 234 to descend, causing the sliding sleeve 234 to pull the rotating arm 239, and through the rotating arm 239, pull the support rod 237 to rotate and unfold. The two end compression wheels 238 press tightly against the inner walls of the adjacent support sleeves 21, so that the two support sleeves 21 fit tightly together. At the same time, one side of the support sleeve 21 presses against the side of the support ball 27, providing rolling friction and support force, ensuring stability during the lifting process, and preventing lateral swaying between multiple support sleeves 21.

[0037] In this embodiment, as Figure 4 As shown, a fixed frame is provided at the bottom of the support frame 21, and a tension sensor 212 is fixedly connected inside the fixed frame. An elastic traction rope 211 is fixedly connected to the bottom of the tension sensor 212. The bottom of the elastic traction rope 211 is fixedly connected to the machine base 1. The tension sensor 212 is electrically connected to the push cylinder 29.

[0038] In this embodiment, an elastic traction rope 211 is used for traction. The elasticity of the elastic traction rope 211 itself is used to pull the support frame 21. When the support frame 21 tends to sway, the elastic traction rope will deform and stretch through reaction force to ensure that the center of gravity of the support frame 21 is always vertically downward, which further prevents swaying and improves the stability of the guide.

[0039] The upper end of the support sleeve 21 is rotatably mounted with a support roller 24. The upper end of the support sleeve 21 is fixedly connected with a top plate 25. The outer surface of the support roller 24 is movably sleeved with a connecting chain 28. One end of the connecting chain 28 is fixedly connected to the top plate 25 inside the adjacent support sleeve 21 on one side, and the other end of the connecting chain 28 is fixedly connected to the lower end of the support sleeve 23 inside the adjacent support sleeve 21 on the other side, so that multiple support sleeves 21 are linked and raised and lowered in sequence through the connecting chain 28.

[0040] Example 2: This embodiment provides a high-level stable unloading platform for automotive parts, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0041] like Figures 7-11As shown, a self-locking device 7 is fixedly connected to the lower end of the support frame 21. The self-locking device 7 includes an electromagnetic self-locking frame 71. A pushing component 72 is movably installed inside the electromagnetic self-locking frame 71. A friction self-locking component 73 is detachably installed at the bottom of the electromagnetic self-locking frame 71.

[0042] like Figures 9-11 As shown, the electromagnetic self-locking frame 71 includes a fixed cover 711. A controller 716 is fixedly connected to the side of the fixed cover 711. Movable latches 712 are movably sleeved at both ends of the fixed cover 711. Limiting rods 713 are fixedly connected to the sides of both movable latches 712. Locking blocks 714 are movably sleeved on the upper and lower sides of the opposite end of the movable latches 712. The side of the locking block 714 near the fixed cover 711 is inclined. The opposite ends of the movable latches 712 are also inclined. Electromagnets 715 are fixedly connected to the upper and lower ends of the fixed cover 711 near the inside of the controller 716. A return spring is provided between the movable latches 712 and the fixed cover 711.

[0043] A locking spring is provided between the two locking blocks 714. When the movable locking bolt 712 retracts, the inclined surface of the locking block 714 is used to squeeze the locking block 714 and retract it into the interior of the movable locking bolt 712, thereby disengaging the movable locking bolt 712 from the pushing component 72.

[0044] In this embodiment, the tension sensor 212 collects tension in real time and identifies overspeed rope slippage and downward momentum through an algorithm. When the threshold is reached, self-locking is triggered immediately.

[0045] Based on this, such as Figure 9 As shown, the pushing component 72 includes a movable frame 721, a pressing block 722 is fixedly connected to the top of the movable frame 721, a limiting frame 723 is fixedly connected to the side of the movable frame 721, a movable frame 724 is fixedly connected to the side of the movable frame 721 away from the limiting frame 723, and magnet blocks 726 are fixedly connected to both the upper and lower ends of the movable frame 724.

[0046] like Figures 10-11 As shown, the lower ends of the compression block 722 are provided with inclined surfaces on both sides corresponding to the opposite side of the movable latch 712. The upper and lower sides of the movable frame 724 and the upper and lower sides inside the fixed cover 711 are provided with support springs 725. The upper and lower ends of the movable frame 724 are fixedly connected with magnet blocks 726. The top of the limiting frame 723 is provided with inclined surfaces that are tilted in the opposite direction on both sides.

[0047] like Figures 10-11As shown, the movable frame 724 is movably sleeved inside the fixed cover 711, the upper and lower end magnet blocks 726 are magnetically attracted to the upper and lower end electromagnets 715 respectively, the pressing block 722 is movably sleeved on the upper part of the fixed cover 711 and located between the movable latches 712 on both sides, and the limiting frame 723 is movably sleeved on the lower end of the fixed cover 711 and movably sleeved on the outer surface of the limiting rods 713 at both ends.

[0048] In this embodiment, when the support frame 21 is normally extended and retracted, the tension sensor 212 outputs a stable value. Once the rope slips, falls, or the speed suddenly increases, the tension instantly loses weight and changes abruptly. The tension sensor 212 collects the signal and determines that the overspeed / fall condition is met. At this time, the electromagnet 715 at the lower end works and magnetically attracts the magnet block 726 at the lower end. At this time, the movable frame 724 drives the pressing block 722 to descend, so that the pressing block 722 is pressed between the two movable latches 712. Through the pressing action of the pressing block 722 and the movable latches 712, the movable latches 712 at both ends push the side frame 734 to press against the inner wall of the adjacent support frame 21, preventing the two support frames 21 from sliding and achieving self-locking. After manually troubleshooting, the reset button is pressed to unlock and restore normal operation.

[0049] Furthermore, after the lifting mast 2 and the lifting platform 3 have come to a complete stop, the value of the tension sensor 212 no longer changes, indicating that the lifting mast 2 and the lifting platform 3 have come to a complete stop. At this time, the electromagnet 715 at the lower end works to magnetically attract the magnet block 726 at the lower end. The movable latches 712 at both ends push the side frame 734 to press against the inner wall of the adjacent support sleeve 21, completing the self-locking while further improving the longitudinal stability between the support sleeves 21 and increasing the stability of longitudinal sway.

[0050] Example 3: This embodiment provides a high-level stable unloading platform for automotive parts, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] like Figure 12 As shown, the friction self-locking assembly 73 includes a bottom frame 731. Both ends of the top of the bottom frame 731 are fixedly connected to a limiting sleeve 732. Both ends of the bottom frame 731 are movably sleeved with a movable rod 733. The opposite ends of the movable rods 733 are fixedly connected to a side frame 734 with a friction plate. The side of the side frame 734 has a slot 735. The limiting sleeve 732 is embedded in the lower end of the fixed cover 711 and sleeved on the outer surface of the movable latch 712. The latch 714 is engaged in the inside of the slot 735.

[0052] Among them, friction plates such as asbestos-based, powder metallurgy, and rubber generate large friction through positive pressure, enabling the support sleeves 21 to achieve self-locking.

[0053] In this embodiment, since the support sleeves 21 rely on friction for self-locking, when the support sleeves 21 slowly slide down during the self-locking process, the friction pads need to be replaced. The controller 716 can control the upper electromagnet 715 to work and magnetically attract the upper magnet block 726, causing the movable frame 724 to move upward. The movable frame 721 drives the limiting frame 723 to push upward. Using the inclined surfaces on both sides of the upper end of the limiting frame 723, the limiting rod 713 is pushed to drive the movable latches 712 at both ends to move towards each other, so that the movable latches 712 retract into the interior of the fixed cover 711, and the friction self-locking assembly 73 automatically disengages under the action of gravity, thereby facilitating the replacement of the friction self-locking assembly 73.

[0054] Working principle: In summary, the unloading platform is pushed to the unloading area, and the unloading personnel climb up ladder 4 to the inside of the lifting platform 3. Then, the lifting mast 2, powered by a hydraulic system (not shown in the diagram), uses a motor to drive a hydraulic pump to generate high-pressure oil. This oil passes through a reversing valve, hydraulic lock, and balance valve into the built-in telescopic cylinder, pushing the piston rod to extend and causing the lifting mast 2 and lifting platform 3 to rise smoothly. The operator unloads the goods onto the lifting platform 3. Subsequently, the lifting mast 2 controls the lowering of the lifting platform 3, and the operator then transports the goods downwards via conveyor 5. During the ascent of the lifting mast 2, each support frame 21 will stretch its corresponding lower elastic traction rope 211. Through the elastic force of the elastic traction rope 211, the support frame 21 is pulled. When the support frame 21 shows a tendency to sway... The elastic traction rope will deform and stretch through reaction force to ensure that the center of gravity of the rising support frame 21 is always vertically downward. When the tension sensor 212 detects that the elastic traction rope 211 is in a stretched state, it determines that the support frame 21 is rising and controls the cylinder 29 to extend through an electrical signal. The cylinder 29 controls the connecting plate 210 to drive the sliding sleeve 234 to descend, so that the sliding sleeve 234 pulls the rotating arm 239, and the rotating arm 239 pulls the support rod 237 to rotate and unfold. The two end compression wheels 238 press tightly against the inner walls of the adjacent support rollers 24, so that the two support frames 21 are closely fitted. At the same time, one side of the support frame 21 presses against the side of the support ball 27 to provide rolling friction and support force, ensuring stability during the lifting process. During the lifting and lowering of the support sleeve 21, the tension sensor 212 collects the tension in real time. When the support sleeve 21 is lifting and lowering normally, the tension sensor 212 outputs a stable value. However, if the rope slips, falls, or the movement speed suddenly increases, the tension sensor will detect the problem. The tension momentarily causes weightlessness and a sudden change; the tension sensor 212 collects the signal and determines that the overspeed / fall condition is met. At this time, the electromagnet 715 at the lower end works and magnetically attracts the magnet block 726 at the lower end. At this time, the movable frame 724 drives the pressing block 722 to descend, so that the pressing block 722 is pressed between the two movable latches 712. Through the pressing action of the pressing block 722 and the movable latches 712, the movable latches 712 at both ends push the side frame 734 to press against the inner wall of the adjacent support frame 21, preventing the two support frames 21 from sliding and achieving self-locking. This prevents the lifting platform 3 from falling during the lifting process. At the same time, when the lifting mast 2 and the lifting platform 3 stop rising and come to a stop, the value of the tension sensor 212 no longer changes, indicating that the lifting mast 2 and the lifting platform 3 have stopped. The movable latches 712 at both ends push the side frame 734 to press against the inner wall of the adjacent support frame 21, completing self-locking and increasing the longitudinal stability between the support frames 21. When the support sleeve 21 slowly slides down during the self-locking process, the friction plate needs to be replaced. This can be achieved by controlling the upper electromagnet 715 via the controller 716 to magnetically attract the upper magnet 726, causing the movable frame 724 to move upwards. The movable frame 721 then pushes the limiting frame 723 upwards. Using the inclined surfaces on both sides of the upper end of the limiting frame 723, the limiting rod 713 is pushed, causing the movable latches 712 at both ends to move towards each other, retracting the movable latches 712 into the interior of the fixed cover 711. The friction self-locking assembly 73 automatically disengages under gravity. The new friction self-locking assembly 73 is then inserted into the bottom of the electromagnetic self-locking frame 71. At this time, the electromagnet 715 stops working, causing the reset spring to drive the movable latch 712 to move to both sides. As the movable latch 712 inserts into the limiting sleeve 732, one end of the movable latch 712 enters the inside of the slot 735. Through the spring inside the latch block 714, the latch block 714 is engaged inside the slot 735, thus quickly completing the replacement of the friction self-locking assembly 73.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-level stable unloading platform for automotive parts, comprising a machine base (1), two lifting masts (2) and a lifting platform (3), wherein a conveyor (5) with a receiving hopper is fixedly connected to the side of the machine base (1), and a climbing ladder (4) is fixedly connected to the side of the machine base (1) for conveying automotive parts to the bottom, characterized in that: The lifting mast (2) includes multiple support frames (21) that are nested and extend in sequence, and support sleeves (23) are fixedly connected to both sides of one end of the support frame (21). The support sleeve (23) is provided with a driveable extrusion roller (238), which presses the inner wall of the adjacent support sleeve (21) outward to eliminate lateral gaps; The bottom of the support frame (21) is connected to the elastic traction rope (211) via a tension sensor (212), and the lower end of the elastic traction rope (211) is fixed to the machine base (1); the lower end of the support frame (21) is fixed with a self-locking device (7), which is electrically linked with the tension sensor (212) to automatically lock the support frame (21) when the lifting is abnormal.

2. The automotive parts high-level stable unloading platform according to claim 1, characterized in that, The two lifting masts (2) are fixedly installed at both ends inside the machine base (1). Each support frame (21) has a limiting groove (22) on both sides of one end. Support bars (26) are fixedly connected to both sides of the inner wall of the support frame (21) away from the limiting groove (22). Multiple support balls (27) are rotatably installed inside the support bars (26). The support balls (27) provide rolling friction and support for the sliding between the two support frames (21) to ensure the stability during the lifting process. The support sleeve (23) includes a square tube (231), the square tube (231) has a side groove (232) on its side, a fixed rail (233) is fixedly connected to one side of the inner wall of the square tube (231), a sliding sleeve plate (234) is slidably connected to the outer surface of the fixed rail (233), a plurality of connecting frames (235) are fixedly connected to the side of the sliding sleeve plate (234), a rotating arm (239) is rotatably installed on the upper end of the connecting frame (235), and a plurality of top frames (236) corresponding to the connecting frames (235) are fixedly connected to the inner wall of the square tube (231). A support rod (237) is rotatably mounted on the upper end of the top frame (236). The end of the support rod (237) away from the top frame (236) is rotatably connected to the extrusion wheel (238). The lower end of the support rod (237) is rotatably connected to one end of the rotating arm (239). The two extrusion wheels (238) are extended outward by the movement of the sliding sleeve plate (234) and pressed tightly against the inner wall of the adjacent support sleeve (21), so that the two support sleeves (21) fit tightly together. The extrusion wheel (238) provides support for multiple support sleeves (21) by sliding, thus avoiding lateral swaying between multiple support sleeves (21).

3. The automotive parts high-level stable unloading platform according to claim 2, characterized in that, The number of rotating arms (239) and support rods (237) are both two, and the two support rods (237) and rotating arms (239) rotate around the fulcrum in two mutually perpendicular directions. The support rods (237) are movably installed inside the side groove (232). The lower end of the support sleeve (21) near the side wall of the support sleeve (23) is fixedly connected to a push cylinder (29). The output end of the push cylinder (29) is fixedly connected to a connecting plate (210). The two ends of the connecting plate (210) are fixedly connected to the sliding sleeves (234) at both ends.

4. The high-level stable unloading platform for automotive parts according to claim 3, characterized in that, The upper end of the support frame (21) is rotatably equipped with a support roller (24), and the upper end of the support frame (21) is fixedly connected with a top plate (25). The outer surface of the support roller (24) is movably sleeved with a connecting chain (28). One end of the connecting chain (28) is fixedly connected to the top plate (25) inside the adjacent support frame (21) on one side, and the other end of the connecting chain (28) is fixedly connected to the lower end of the support sleeve (23) inside the adjacent support frame (21) on the other side, so that multiple support frames (21) can be linked and lifted in sequence through the connecting chain (28).

5. The automotive parts high-level stable unloading platform according to claim 1, characterized in that, The self-locking device (7) includes an electromagnetic self-locking frame (71), a pushing component (72) is movably installed inside the electromagnetic self-locking frame (71), and a friction self-locking component (73) is detachably installed at the bottom of the electromagnetic self-locking frame (71).

6. The automotive parts high-level stable unloading platform according to claim 5, characterized in that, The electromagnetic self-locking frame (71) includes a fixed cover (711), a controller (716) is fixedly connected to the side of the fixed cover (711), movable latches (712) are movably sleeved at both ends of the fixed cover (711), limit rods (713) are fixedly connected to the sides of the movable latches (712) at both ends, and locking blocks (714) are movably sleeved on the upper and lower sides of the opposite end of the movable latches (712) at both ends, the side of the locking block (714) near the fixed cover (711) is inclined, and the opposite end of the movable latches (712) at both ends is inclined, and electromagnets (715) are fixedly connected to the upper and lower ends of the fixed cover (711) near the inside of the controller (716), and a return spring is provided between the movable latches (712) and the fixed cover (711).

7. The automotive parts high-level stable unloading platform according to claim 6, characterized in that, The pushing assembly (72) includes a movable frame (721), a pressing block (722) is fixedly connected to the top of the movable frame (721), a limiting frame (723) is fixedly connected to the side of the movable frame (721), a movable frame (724) is fixedly connected to the side of the movable frame (721) away from the limiting frame (723), and magnet blocks (726) are fixedly connected to both the upper and lower ends of the movable frame (724).

8. The high-level stable unloading platform for automotive parts according to claim 7, characterized in that, The lower ends of the compression block (722) are respectively provided with inclined surfaces on both sides corresponding to the side of the movable latch (712). The upper and lower sides of both ends of the movable frame (724) and the upper and lower sides inside the fixed cover (711) are provided with support springs (725). The upper and lower ends of the movable frame (724) are fixedly connected with magnet blocks (726). The top of the limiting frame (723) is provided with inclined surfaces that are tilted in the opposite direction on both sides.

9. A high-level stable unloading platform for automotive parts according to claim 8, characterized in that, The movable frame (724) is movably sleeved inside the fixed cover (711). The magnet blocks (726) at the upper and lower ends are magnetically attracted to the electromagnets (715) at the upper and lower ends, respectively. The squeezing block (722) is movably sleeved on the upper part of the fixed cover (711) and located between the movable latches (712) on both sides. The limiting frame (723) is movably sleeved on the lower end of the fixed cover (711) and movably sleeved on the outer surface of the limiting rods (713) at both ends.

10. A high-level stable unloading platform for automotive parts according to claim 9, characterized in that, The friction self-locking assembly (73) includes a bottom frame (731), with a limiting sleeve (732) fixedly connected to both ends of the top of the bottom frame (731). Movable rods (733) are movably sleeved at both ends of the bottom frame (731). Side frames (734) with friction plates are fixedly connected to the opposite ends of the two movable rods (733). The side of the side frame (734) has a slot (735). The limiting sleeve (732) is embedded in the lower end of the fixed cover (711) and sleeved on the outer surface of the movable latch (712). The locking block (714) is locked inside the slot (735).

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