A layer-changing lifting device for logistics storage

Abstract

The application relates to the technical field of logistics storage, and discloses a layer-changing lifting device for logistics storage, which comprises two conveying roller frames for conveying, the side surfaces of the conveying roller frames away from each other are fixedly connected with connecting plates, the side surfaces of the connecting plates away from the conveying roller frames are fixedly connected with buffer mechanisms, and the side surfaces of the buffer mechanisms away from the conveying roller frames are fixedly connected with layer-changing mechanisms; when the layer-changing device is used for conveying, goods are placed on the conveying roller frames, at the moment, the buffer mechanisms drive the conveying roller frames to move as a whole, when the conveying roller frames stop, the moving plates and the fixed plates move up and down along with the conveying roller frames, the buffer springs are compressed when the moving plates move, thereby buffering, after the buffering, the electromagnets are electrified, repulsive force is generated between the electromagnets and the magnetic plates, thereby making the magnetic plates move to the highest point, at the moment, the moving plates move to the highest point, the height of the conveying roller frames is determined, and the layer-changing displacement precision is ensured while the conveying roller frames are buffered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics warehousing, more particularly to a layer-changing lifting device for logistics warehousing. BACKGROUND

[0002] The layer-changing lifting machine is used in an automated warehousing system to lift a shuttle vehicle or a material box to a designated layer of a vertical shelf through a lifting platform, so as to realize quick layer-changing operation of goods between different layers. The layer-changing lifting machine is usually composed of a lifting device, a transmission device, a control system and the like, and can accurately and quickly lift materials to a designated position according to production requirements.

[0003] In a modern logistics warehousing system, quick and accurate flow transfer of goods between different floors or different height shelf layers is a core link to improve overall operation efficiency. The layer-changing lifting device is a special equipment for this key task of vertical and horizontal transfer, and its performance directly affects the throughput, response speed and automation degree of warehousing operation. With the explosive growth of e-commerce and the demand for flexible supply chain in intelligent manufacturing, multi-floor warehouses and intensive vertical warehouses are increasingly widely used, and the importance of the layer-changing lifting device is gradually increasing.

[0004] When lifting and conveying a material box or a shuttle vehicle, in order to ensure accurate layer-changing work, the lifting device needs to be rigidly arranged to ensure its accuracy of moving to a fixed position. If a buffer mechanism is arranged, the buffer mechanism will move up and down, causing errors. When lifting, the lifting device needs to be accelerated first, and then decelerated a distance before reaching the destination, to avoid rapid deceleration and damage to the goods due to overloading or weightlessness. However, a longer deceleration distance will reduce the overall lifting efficiency.

[0005] When lifting and conveying a high material box, the current lifting device cannot limit the side of the material box, so there is a risk of falling during the conveying process. When it falls, it may be damaged itself, and also poses a threat to the safety of workers. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a layer-changing lifting device for logistics warehousing to solve the technical problems proposed in the background art.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a layer changing lifting device for logistics storage, comprising two conveying roller frames for conveying, the conveying roller frames are fixedly connected with connecting plates on the sides away from each other, the connecting plates are fixedly connected with buffer mechanisms on the sides away from the conveying roller frames, and the buffer mechanisms are fixedly connected with layer changing mechanisms on the sides away from the conveying roller frames; the buffer mechanism comprises a fixed box, the layer changing mechanism controls the moving position of the fixed box, the bottom end of the fixed box is fixedly connected with an electromagnet, the top end of the electromagnet is provided with a magnetic plate, the top end of the magnetic plate is fixedly connected with a moving block, the top end of the moving block is fixedly connected with a moving plate, the side of the moving plate is fixedly connected with a fixed plate, the bottom end of the moving plate is fixedly connected with a limiting rod, the bottom end of the side of the limiting rod is movably sleeved with a limiting cylinder, and the side of the limiting rod and the limiting cylinder is sleeved with a buffer spring.

[0008] In a preferred embodiment, the middle of the two conveying roller frames is fixedly connected with a connecting rod, and the two ends of the sides of the two conveying roller frames are fixedly connected with limiting mechanisms.

[0009] In a preferred embodiment, the bottom end of the limiting rod is fixedly connected with a connecting spring, the bottom end of the connecting spring is fixedly connected with a pressure sensor, the bottom end of the pressure sensor is fixedly connected with the top end of the fixed box, and the connecting spring and the pressure sensor are located in the limiting cylinder.

[0010] In a preferred embodiment, the side of the fixed plate is fixedly connected with the side of the connecting plate, the side of the fixed plate close to the fixed plate is fixedly connected with a wedge-shaped plate, the side of the fixed plate is provided with a limiting groove matched with the wedge-shaped plate, and the wedge-shaped plate is located in the limiting groove of the fixed plate.

[0011] In a preferred embodiment, when the layer changing mechanism drives the buffer mechanism to be lifted upward to a preset position and stop, the value detected in the pressure sensor gradually decreases and then increases again, the electromagnet is energized when the pressure value detected by the pressure sensor increases again, when the layer changing mechanism drives the buffer mechanism to move downward to a preset position and stop, the value detected in the pressure sensor changes as follows: increase - decrease - increase again, and the electromagnet is energized when the value detected in the pressure sensor decreases to increase again.

[0012] In a preferred embodiment, the layer changing mechanism comprises a first limiting frame and a second limiting frame for supporting, the top end of the first limiting frame is fixedly connected with a servo motor, the bottom end of the servo motor is fixedly connected with a threaded rod, the side of the threaded rod is threadedly connected with a first lifting block, the inside of the second limiting frame is fixedly connected with a supporting rod, and the side of the supporting rod is movably connected with a second lifting block.

[0013] In a preferred implementation form, the limiting mechanism comprises a supporting block, a protection frame is fixedly connected to the side of the supporting block, an output motor is fixedly connected to the side of the protection frame away from the supporting block, an output shaft is fixedly connected to the side of the protection frame close to the output motor, and an output bevel gear is fixedly connected to the side of the output shaft away from the output motor.

[0014] In a preferred implementation form, the side of the output bevel gear is engaged with a transmission bevel gear, a rotating shaft is fixedly connected to the inside of the transmission bevel gear, first bevel gears are fixedly connected to the two sides of the rotating shaft, the side of the first bevel gear is engaged with a second bevel gear, a rotating rod is fixedly connected to the side of the second bevel gear away from the first bevel gear, and a limiting plate is fixedly connected to the side of the rotating rod.

[0015] Technical effects and advantages of the present application:

[0016] When the present application is used for layer changing, the goods are placed on the conveying roller frame, at this time, the buffer mechanism drives the conveying roller frame to move as a whole, when the conveying roller frame stops, the moving plate and the fixed plate move up and down with the conveying roller frame, and when the moving plate moves, the buffer spring is compressed to provide buffering, after buffering, the electromagnet is electrified to generate a magnetic repulsion force between the electromagnet and the magnetic plate, so that the magnetic plate moves to the highest point, at this time, the moving plate moves to the highest point, which ensures the height of the conveying roller frame, and ensures the layer changing displacement accuracy while buffering the conveying roller frame.

[0017] The present application is provided with a servo motor, a threaded rod and a first lifting block, when the servo motor is started, the threaded rod is driven to rotate, when the threaded rod rotates, the first lifting block moves up and down, when the first lifting block moves, the buffer mechanism drives the conveying roller frame to move, so as to accurately control the moving position of the conveying roller frame, so that the conveying roller frame can deliver the goods to a more accurate position when changing layers, and the whole work is more smooth.

[0018] When the present application is used for transporting high goods, the output motor is started and drives the output shaft to rotate, when the output shaft rotates, the output bevel gear and the transmission bevel gear drive the rotating shaft to rotate, when the rotating shaft rotates, the rotating rod is driven to rotate through the transmission of the first bevel gear and the second bevel gear, when the rotating rod rotates, the limiting plate is driven to rotate out of the supporting block, at this time, the limiting plate is beside the goods, so as to limit the goods and prevent them from falling. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a schematic diagram of the overall structure of the present application.

[0021] Figure 3It is the whole structure schematic view of the buffer mechanism of the application.

[0022] Figure 4 It is the exploded structure schematic view of the buffer mechanism of the application.

[0023] Figure 5 It is the internal structure schematic view of the fixed box of the application.

[0024] Figure 6 It is the structure schematic view of the layer changing mechanism of the application.

[0025] Figure 7 It is the whole structure schematic view of the limiting mechanism of the application.

[0026] Figure 8 It is the internal structure schematic view of the limiting mechanism of the application.

[0027] The figure mark is: 1, conveying roller frame; 2, connecting rod; 3, connecting plate; 4, buffer mechanism; 401, fixed box; 402, electromagnet; 403, magnetic plate; 404, moving block; 405, moving plate; 406, fixed plate; 407, limiting rod; 408, limiting cylinder; 409, buffer spring; 410, connecting spring; 411, pressure sensor; 412, wedge-shaped plate; 5, layer changing mechanism; 501, first limiting frame; 502, servo motor; 503, threaded rod; 504, first lifting block; 505, second limiting frame; 506, support rod; 507, second lifting block; 6, limiting mechanism; 601, support block; 602, protection frame; 603, output motor; 604, output shaft; 605, output bevel gear; 606, transmission bevel gear; 607, rotating shaft; 608, first bevel gear; 609, second bevel gear; 610, rotating rod; 611, limiting plate. DETAILED DESCRIPTION

[0028] The technical solutions in the application will be described clearly and completely below in combination with the drawings in the application, and in addition, the forms of each structure described in the following embodiments are only examples, and the layer changing and lifting device for logistics storage involved in the application is not limited to each structure described in the following embodiments, and all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the protection scope of the application.

[0029] REFERENCE Figure 1 AND Figure 2The application provides a layer-changing lifting device for logistics storage, which comprises two conveying roller frames 1, the conveying roller frames 1 are fixedly connected with connecting plates 3 on the sides away from each other, the connecting plates 3 are fixedly connected with buffer mechanisms 4 on the sides away from the conveying roller frames 1, the buffer mechanisms 4 are fixedly connected with layer-changing mechanisms 5 on the sides away from the conveying roller frames 1, the middle of the two conveying roller frames 1 is fixedly connected with a connecting rod 2, and the two conveying roller frames 1 are fixedly connected with limiting mechanisms 6 on the sides close to each other.

[0030] In the embodiment of the application, the layer-changing mechanism 5 drives the two conveying roller frames 1 to move synchronously, so that the two conveying roller frames 1 can respectively perform conveying work, thereby improving work efficiency, and the two conveying roller frames 1 are connected through the connecting rod 2, thereby supporting the conveying roller frames 1 and ensuring the strength of the conveying roller frames 1 during transportation.

[0031] Referring to Figure 3 , Figure 4 and Figure 5 , the buffer mechanism 4 comprises a fixed box 401, the layer-changing mechanism 5 controls the moving position of the fixed box 401, the bottom end of the fixed box 401 is fixedly connected with an electromagnet 402, the top end of the electromagnet 402 is provided with a magnetic plate 403, the top end of the magnetic plate 403 is fixedly connected with a moving block 404, the top end of the moving block 404 is fixedly connected with a moving plate 405, the side of the moving plate 405 is fixedly connected with a fixed plate 406, the bottom end of the moving plate 405 is fixedly connected with a limiting rod 407, the bottom end of the side of the limiting rod 407 is movably sleeved with a limiting cylinder 408, the side of the limiting rod 407 and the limiting cylinder 408 is sleeved with a buffer spring 409, the bottom end of the limiting rod 407 is fixedly connected with a connecting spring 410, the bottom end of the connecting spring 410 is fixedly connected with a pressure sensor 411, the bottom end of the pressure sensor 411 is fixedly connected with the top end of the fixed box 401, the connecting spring 410 and the pressure sensor 411 are located in the limiting cylinder 408, the side of the fixed plate 406 is fixedly connected with the side of the connecting plate 3, the side of the fixed plate 406 close to the fixed box 401 is fixedly connected with a wedge-shaped plate 412, the side of the fixed plate 406 is provided with a limiting groove matched with the wedge-shaped plate 412, and the wedge-shaped plate 412 is located in the limiting groove of the fixed plate 406.

[0032] When the layer-changing mechanism 5 drives the buffer mechanism 4 to be lifted upward to a preset position and then stopped, the value detected in the pressure sensor 411 gradually decreases and then increases again, the electromagnet 402 is powered when the pressure value detected by the pressure sensor 411 increases again, when the layer-changing mechanism 5 drives the buffer mechanism 4 to move downward to a preset position and then stops, the value detected in the pressure sensor 411 changes as follows: increase - decrease - increase again, and the electromagnet 402 is powered when the value detected by the pressure sensor 411 decreases and then increases again.

[0033] In the embodiment of the present application, when the conveying is lifted upward, the emergency brake is performed when reaching the preset position, and the fixed box 401 is paused with the stop of the layer changing mechanism 5, at this time, the conveying roller frame 1 and the moving plate 405 continue to move upward under the inertia, the pressure value detected by the pressure sensor 411 decreases, the conveying roller frame 1 and the goods move to the highest point and then move downward, at this time, the pressure value detected by the pressure sensor 411 increases again, when the pressure value increases again, the electromagnet 402 is energized, the magnetic repulsion force is generated between the electromagnet 402 and the magnetic plate 403 when the electromagnet 402 is energized, under the action of the magnetic repulsion force, the magnetic plate 403 drives the moving block 404 and the moving plate 405 to move upward, thus the magnetic plate 403 is paused and moved upward to the highest point under the action of the magnetic repulsion force when the goods and the conveying roller frame 1 move downward, at this time, the force received by the goods is small, which ensures that the goods will not be damaged,

[0034] and the current size of the electromagnet 402 is proportional to the pressure size detected by the pressure sensor 411 when the goods are placed, which ensures that the goods can move to the highest point, thus when the layer changing mechanism 5 controls the fixed box 401 to move to the preset position, the goods also move to the preset position, and the accurate layer changing work is performed;

[0035] When moving downward, the fixed box 401 is braked, and the conveying roller frame 1 and the structures such as the magnetic plate 403 and the moving plate 405 continue to move downward under the inertia, so that the buffer spring 409 and the connecting spring 410 are compressed again, at this time, the pressure value detected by the pressure sensor 411 increases again, after being compressed to the lowest point, the moving plate 405 moves upward under the reset of the buffer spring 409, and after moving to the highest point, the moving plate 405 moves downward again, thus the pressure value detected by the pressure sensor 411 changes as increasing-decreasing-increasing again, when the pressure value decreases and then increases again, the electromagnet 402 is energized and the magnetic repulsion force is generated between the electromagnet 402 and the magnetic plate 403, at this time, the goods are moved downward again when being pushed to the highest point by the rebounding buffer spring 409, when moving downward again, the goods receive upward force under the influence of the magnetic repulsion force, at this time, the moving block 404, the moving plate 405 and the conveying roller frame 1 are synchronously subjected to upward force through the magnetic plate 403, so that the goods are paused and stably moved to the highest point, and only a small displacement is needed to move to the highest point, thus the stability can be ensured.

[0036] Referring to Figure 6 The layer changing mechanism 5 comprises a first limiting frame 501 and a second limiting frame 505 for supporting, the top end of the first limiting frame 501 is fixedly connected with a servo motor 502, the bottom end of the servo motor 502 is fixedly connected with a threaded rod 503, the side surface of the threaded rod 503 is threadedly connected with a first lifting block 504, the inside of the second limiting frame 505 is fixedly connected with a supporting rod 506, and the side surface of the supporting rod 506 is movably connected with a second lifting block 507.

[0037] In the embodiment of the application, the servo motor 502 is started and drives the threaded rod 503 to rotate, the threaded rod 503 rotates to move the first lifting block 504, the first lifting block 504 moves to drive the conveying roller frame 1 and the goods above the conveying roller frame 1 to move through the buffer mechanism 4 and the connecting plate 3, and the second lifting block 507 moves on the side of the supporting rod 506, thereby ensuring the stability of the conveying roller frame 1 when moving.

[0038] Referring to Figure 7 With Figure 8 The limiting mechanism 6 comprises a supporting block 601, the supporting block 601 is fixedly connected with a protection frame 602 on the side, the protection frame 602 is fixedly connected with an output motor 603 away from the side of the supporting block 601, the output motor 603 is fixedly connected with an output shaft 604 on the side close to the protection frame 602, the output shaft 604 is fixedly connected with an output bevel gear 605 away from the side of the output motor 603, the output bevel gear 605 is meshed with a transmission bevel gear 606 on the side, the transmission bevel gear 606 is fixedly connected with a rotating shaft 607 inside, the rotating shaft 607 is fixedly connected with a first bevel gear 608 on both sides, the first bevel gear 608 is meshed with a second bevel gear 609 on the side, the second bevel gear 609 is fixedly connected with a rotating rod 610 away from the side of the first bevel gear 608, and the rotating rod 610 is fixedly connected with a limiting plate 611 on the side.

[0039] In the embodiment of the application, the output motor 603 is started and drives the output shaft 604 to rotate, the output shaft 604 rotates to drive the rotating shaft 607 to rotate through the output bevel gear 605 and the transmission bevel gear 606, the rotating shaft 607 rotates to drive the rotating rod 610 to rotate after the transmission of the first bevel gear 608 and the second bevel gear 609, and the rotating rod 610 rotates to drive the limiting plate 611 to rotate upward from inside the supporting block 601, at this time, the limiting plate 611 is located beside the goods, thereby limiting the goods to avoid falling.

[0040] The working principle of the application is as follows: when the layer changing and lifting conveying is performed, the goods to be transported are placed above the conveying roller frame 1, after being placed above the conveying roller frame 1, the conveying roller frame 1 drives the moving plate 405 to move downward through the connecting plate 3 and the fixed plate 406 under the action of gravity, the moving plate 405 moves downward to drive the limiting rod 407 to move downward, at this time, the buffer spring 409 and the connecting spring 410 are compressed, the connecting spring 410 moves, the weight of the goods is different, the compression amount is different, thereby the pressure on the pressure sensor 411 is different, and the greater the pressure of the pressure sensor 411, the heavier the goods.

[0041] After the goods are placed, the servo motor 502 is started and drives the threaded rod 503 to rotate, and the threaded rod 503 rotates to move the first lifting block 504, and the first lifting block 504 moves to drive the conveying roller frame 1 and the goods above through the buffer mechanism 4 and the connecting plate 3 to move upward, and when the first lifting block 504 moves to the preset position, the servo motor 502 controls the first lifting block 504 to brake suddenly, reduces the moving time, and after the sudden braking, the fixed box 401 is paused, and the conveying roller frame 1 and the moving plate 405 continue to move, at this time, the compressed connecting spring 410 resets, and the pressure value detected by the pressure sensor 411 decreases, and the conveying roller frame 1 and the goods move to the highest point and then move downward, at this time, the pressure value detected by the pressure sensor 411 increases again, and when the pressure value increases again, the electromagnet 402 is energized, and the current flowing through the electromagnet 402 is proportional to the pressure detected by the pressure sensor 411 when the goods are placed;

[0042] When the electromagnet 402 is energized, repulsive force is generated between the electromagnet 402 and the magnetic plate 403, and under the action of the repulsive force, the magnetic plate 403 drives the moving block 404 and the moving plate 405 to move upward, so that the magnetic plate 403 is paused under the action of the repulsive force when the goods and the conveying roller frame 1 move downward, and the goods are paused and moved to the highest point under the action of the repulsive force, at this time, the force received by the goods is small, which ensures that the goods will not be damaged, and the goods are stably braked and moved to the highest point, and then the goods are conveyed in layers;

[0043] When the goods are moved downward in layers, the servo motor 502 controls the first lifting block 504 to brake suddenly again, and after the sudden braking, the fixed box 401 is fixed, and the conveying roller frame 1 and the magnetic plate 403, the moving plate 405 and other structures move downward again, so that the buffer spring 409 and the connecting spring 410 are compressed again, at this time, the pressure value detected by the pressure sensor 411 increases again, and after being compressed to the lowest point, the buffer spring 409 resets to move the moving plate 405 upward, and after moving to the highest point, the moving plate 405 moves downward again, so that the pressure value detected by the pressure sensor 411 changes as increase-decrease-increase again, and when the pressure value decreases and then increases again, the electromagnet 402 is energized to generate repulsive force with the magnetic plate 403, at this time, the goods are moved to the highest point and then moved downward again, and under the influence of the repulsive force, the goods receive upward force, at this time, the moving block 404, the moving plate 405 and the conveying roller frame 1 are synchronously moved upward through the magnetic plate 403, so that the goods are paused and stably moved to the highest point, and then the goods are conveyed in layers;

[0044] When conveying high goods, the goods are placed on the conveying roller frame 1, the output motor 603 drives the output shaft 604 to rotate, the output shaft 604 drives the transmission bevel gear 606 to rotate through the output bevel gear 605 when rotating, the transmission bevel gear 606 drives the rotating shaft 607 to rotate when rotating, the rotating shaft 607 drives the first bevel gear 608 on both sides to rotate synchronously when rotating, the first bevel gear 608 drives the rotating rod 610 to rotate through the second bevel gear 609 when rotating, and then the limiting plate 611 is rotated from the supporting block 601, the goods on the conveying roller frame 1 are limited and supported, and falling is prevented.

[0045] Finally: the above is only the preferred embodiment of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A layer-changing lifting device for logistics warehousing, comprising two conveying roller frames (1) for conveying, characterized in that: Each of the conveyor roller frames (1) has a connecting plate (3) fixedly connected to its opposite sides. Each of the connecting plates (3) has a buffer mechanism (4) fixedly connected to its opposite side. Each of the buffer mechanisms (4) has a layer-changing mechanism (5) fixedly connected to its opposite side. The buffer mechanism (4) includes a fixed box (401). The layer-changing mechanism (5) controls the movement of the fixed box (401). An electromagnet (402) is fixedly connected to the bottom of the fixed box (401). The top of the electromagnet (402)... A magnetic plate (403) is provided at one end. A movable block (404) is fixedly connected to the top of the magnetic plate (403). A movable plate (405) is fixedly connected to the top of the movable block (404). A fixed plate (406) is fixedly connected to the side of the movable plate (405). A limiting rod (407) is fixedly connected to the bottom of the movable plate (405). A limiting cylinder (408) is movably sleeved on the bottom of the side of the limiting rod (407). A buffer spring (409) is sleeved on the side of the limiting rod (407) and the limiting cylinder (408). The bottom end of the limiting rod (407) is fixedly connected to a connecting spring (410), the bottom end of the connecting spring (410) is fixedly connected to a pressure sensor (411), the bottom end of the pressure sensor (411) is fixedly connected to the top end of the fixed box (401), and the connecting spring (410) and the pressure sensor (411) are located inside the limiting cylinder (408). The side of the fixing plate (406) is fixedly connected to the side of the connecting plate (3). The side of the fixing box (401) near the fixing plate (406) is fixedly connected to a wedge plate (412). The side of the fixing plate (406) is provided with a limiting groove that matches the wedge plate (412). The wedge plate (412) is located in the limiting groove of the fixing plate (406). When the layer-changing mechanism (5) drives the buffer mechanism (4) to rise to the preset position and stop, the value detected in the pressure sensor (411) gradually decreases and then increases again. When the pressure value detected by the pressure sensor (411) increases again, the electromagnet (402) is energized. When the layer-changing mechanism (5) drives the buffer mechanism (4) to move down to the preset position and stop, the value detected in the pressure sensor (411) changes as follows: increase - decrease - increase again. When the pressure sensor (411) decreases and then increases again, the electromagnet (402) is energized.

2. The layer-changing lifting device for logistics warehousing according to claim 1, characterized in that: A connecting rod (2) is fixedly connected in the middle of the two conveying roller frames (1), and a limit mechanism (6) is fixedly connected at both ends of the two conveying roller frames (1) close to each other on the sides.

3. The layer-changing lifting device for logistics warehousing according to claim 1, characterized in that: The layer-changing mechanism (5) includes a first limiting frame (501) and a second limiting frame (505) for support. A servo motor (502) is fixedly connected to the top of the first limiting frame (501), and a threaded rod (503) is fixedly connected to the bottom of the servo motor (502). A first lifting block (504) is threadedly connected to the side of the threaded rod (503). A support rod (506) is fixedly connected inside the second limiting frame (505), and a second lifting block (507) is movably connected to the side of the support rod (506).

4. The layer-changing lifting device for logistics warehousing according to claim 2, characterized in that: The limiting mechanism (6) includes a support block (601) for support, a protective frame (602) is fixedly connected to the side of the support block (601), an output motor (603) is fixedly connected to the side of the protective frame (602) away from the support block (601), an output shaft (604) is fixedly connected to the side of the output motor (603) close to the protective frame (602), and an output bevel gear (605) is fixedly connected to the side of the output shaft (604) away from the output motor (603).

5. A layer-changing lifting device for logistics warehousing according to claim 4, characterized in that: The output bevel tooth (605) is engaged with a transmission bevel tooth (606) on its side. A rotating shaft (607) is fixedly connected inside the transmission bevel tooth (606). A first bevel tooth (608) is fixedly connected to both sides of the rotating shaft (607). A second bevel tooth (609) is engaged with the side of the first bevel tooth (608). A rotating rod (610) is fixedly connected to the side of the second bevel tooth (609) away from the first bevel tooth (608). A limit plate (611) is fixedly connected to the side of the rotating rod (610).

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