A double-column stacker crane for intelligent storage and transportation systems

Abstract

This invention relates to the field of warehousing and stacking technology, and discloses a double-column stacker crane for intelligent storage and transportation systems. To address key issues such as sagging of the loading platform due to excessive force during loading and unloading, and slippage of goods during handling, a pair of screw-driven clamps are installed on the loading platform. The motor drives the screws to rotate forward and backward, allowing the clamps to move closer and further apart. When the two clamps are close together, they securely hold the goods placed on the loading platform, ensuring stable vertical movement of the goods during transport. When the two clamps move further apart to their maximum distance, anti-fall bars installed on the clamps insert into limiting slots, restricting the vertical movement of the loading platform and allowing it to hover stably at its designated height. Ultimately, this achieves the goals of goods clamping and transportation, as well as the platform's positioning and stopping.

Description

Technical Field

[0001] This invention relates to the field of warehousing and stacking technology, and in particular to a double-column stacker crane for intelligent storage and transportation systems. Background Technology

[0002] The double-column stacker crane in an intelligent storage and transportation system is a core piece of equipment in automated storage and retrieval systems (AS / RS). It employs a rigid frame constructed from two parallel columns and high-strength beams, enabling high-load, high-precision, and long-stroke operation, achieving high-speed storage and retrieval of goods. It is widely used in high-density warehousing scenarios such as e-commerce logistics and automobile manufacturing, significantly improving space utilization and operational efficiency.

[0003] In practical applications, when a loading platform is handling goods of a certain height, it currently relies mainly on steel wire ropes to limit its stability. However, this method has a significant drawback: once goods are placed on the platform, if the load on the platform increases suddenly, the tension on the steel wire rope will also increase dramatically. When the tension exceeds the steel wire rope's bearing capacity, it will break, causing the platform to lose support and plummet under the influence of gravity. This sudden fall can not only cause serious damage to the stacker crane itself but may also lead to a safety accident, threatening the lives of nearby workers.

[0004] Furthermore, current cargo handling methods involve placing goods directly on loading platforms for vertical transport, lacking effective stabilization measures. During transport, if vibrations, shaking, or sudden stops occur, goods can easily slip due to inertia. Slipping goods not only damage the goods themselves, affecting their usability and resale value, but may also damage surrounding equipment, causing malfunctions or damage, further increasing maintenance costs and downtime, and adversely affecting the company's normal production and operations. Summary of the Invention

[0005] This invention proposes a double-column stacker crane for intelligent storage and transportation systems. It utilizes the advantages of the loading platform's clamping function during cargo handling and its ability to limit and hover during loading and unloading operations. The aim is to effectively solve the key problems mentioned in the background art, such as the loading platform sagging due to excessive force during loading and unloading, and the slippage of goods during handling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a double-column stacker crane for an intelligent storage and transportation system, comprising: a traveling mechanism, with main columns and auxiliary columns symmetrically arranged on the surface for vertically guiding and limiting the loading platform; a lifting mechanism is fastened to the side of the main column, and a steel wire rope at the output end of the lifting mechanism can pull the loading platform up and down; symmetrically movably mounted cargo clamps on the surface of the loading platform, the two cargo clamps are adjusted in position by a screw driven by a motor, and the cargo clamps move relatively away from each other; an anti-fall bar is threadedly connected to one side of the cargo clamp, and a limiting groove is opened on the side of the auxiliary column to cooperate with it; when the cargo clamps are relatively close, the cargo on the loading platform is clamped; when the cargo clamps are relatively far apart, the anti-fall bar is inserted into the limiting groove to suspend the loading platform.

[0007] Furthermore, the limiting groove is a rectangular groove.

[0008] Furthermore, an adjustment support is movably installed on the inner side of the main column, and the side of the adjustment support is provided with external teeth. A limited movement wheel is fixedly installed on the side of the loading platform, and a limited movement cylinder assembly that cooperates with the adjustment support is movably installed on the outer side of the main column.

[0009] Furthermore, the external teeth are shaped like isosceles triangles.

[0010] Furthermore, the limited-motion cylinder assembly includes: a cylinder housing, fixed to the outside of the main column; a piston rod of a sealed movable assembly inside the cylinder housing fixedly connected to the side of the adjusting support; and an oil reservoir, fixed to the outside of the main column, containing hydraulic oil, with the cylinder housing and the oil reservoir connected by an oil drain pipe and an oil suction pipe, the oil suction pipe being equipped with a one-way valve.

[0011] Furthermore, a drive ramp located on the outer side of the support is provided on the side of the external teeth, and a drive push rod pushed by a push spring is movably installed on the side of the cargo clamp.

[0012] Furthermore, a reversing wheel frame for reversing the wire rope is movably installed on the top of the main column, a detection wheel is movably installed at the bottom of the reversing wheel frame, and an overload protection seat pushed by an overload spring is movably installed on the top of the main column.

[0013] Furthermore, the side shape of the overload protection seat is a right-angled triangle.

[0014] Furthermore, the top of the support has a test seat that is bolted on, and the top of the test seat has a partial slope. The inner side of the limiting cylinder assembly is sealed with a retaining ring, and the retaining ring and the piston rod are movably connected by a connecting rod.

[0015] The present invention has the following beneficial effects:

[0016] This invention provides a double-column stacker crane for an intelligent storage and transportation system. A pair of clamps are mounted on a loading platform, and these clamps are driven by a lead screw. Specifically, a motor serves as the power source and is closely connected to the lead screw. When the motor starts and rotates in both forward and reverse directions, it drives the lead screw to rotate synchronously. Due to the threaded transmission between the lead screw and the clamps, the forward and reverse rotation of the lead screw causes the clamps to move relative to each other in a predetermined direction, thereby enabling the clamps to move closer or further apart.

[0017] When the motor drives the lead screw to rotate, bringing the two clamps closer together, the clamps gradually tighten from both sides of the goods, creating a stable clamping force on the goods placed on the loading platform. This stable clamping effectively prevents the goods from swaying or shifting during vertical transport, ensuring that the goods always maintain a stable, vertical upward movement. This improves the safety and accuracy of cargo transportation and reduces the risk of collisions and damage caused by cargo swaying.

[0018] When the motor rotates in reverse, driving the two clamps away from each other until they reach their limit positions, anti-fall bars, pre-installed on the clamps, will insert into the limit slots after the clamps reach their limits, allowing the loading platform to be stably suspended at its current height. This design plays a crucial role during loading and unloading, effectively preventing the loading platform from accidentally falling due to excessive load or external interference. In practical applications, when the stacker crane transports goods to designated locations for loading or unloading, the loading platform needs to remain stable to ensure smooth operation. The cooperation between the anti-fall bars and the limit slots provides reliable protection for the entire loading and unloading process.

[0019] In summary, the double-column stacker crane provided by this invention achieves the dual purpose of cargo clamping and transportation as well as cargo platform positioning and suspension limiting through the relative movement of the loading clamps on the loading platform and the limiting function of the anti-fall bar, providing strong support for the efficient and safe operation of intelligent storage and transportation systems. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0021] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0022] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0023] Figure 2 This is a schematic diagram showing the position and three-dimensional structure between the bottom of the loading platform and the auxiliary column in this invention;

[0024] Figure 3 This is a schematic diagram showing the position and three-dimensional structure between the top of the loading platform and the main column in this invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section E in the middle;

[0026] Figure 5 This is a three-dimensional magnified schematic diagram of the position adjustment of each component on the support in this invention and its partial structure.

[0027] Figure 6 This is a schematic diagram of the position and three-dimensional structure between the bottom of the loading platform and the adjusting support in this invention.

[0028] In the diagram: 1. Traveling mechanism; 101. Main column; 102. Secondary column; 103. Limiting groove; 2. Cargo platform; 201. Cargo clamp; 202. Anti-fall bar; 203. Lead screw; 204. Motor; 205. Drive push rod; 206. Push spring; 207. Limiting wheel; 3. Lifting mechanism; 300. Wire rope; 4. Adjusting support; 401. External gear; 402. Drive inclined part; 5. Reversing wheel frame; 501. Detection wheel; 6. Limiting cylinder assembly; 600. Cylinder housing; 601. Piston rod; 602. Retaining ring; 603. Oil reservoir; 604. Oil drain pipe; 605. Oil suction pipe; 7. Detection seat; 8. Overload protection seat; 801. Overload spring. Detailed Implementation

[0029] 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.

[0030] Example 1, please refer to Figure 1As can be seen, the traveling mechanism 1, serving as the support for the entire main body, can move along a specific track. The traveling mechanism 1 is symmetrically and securely connected to a main column 101 and a secondary column 102, with a crossbeam connecting the tops of the main column 101 and the secondary column 102, thus ensuring the relative stability of the frame formed by the main column 101 and the secondary column 102. A loading platform 2 is movably mounted on the main column 101 and the secondary column 102. Correspondingly, a lifting mechanism 3 is securely mounted on the side of the main column 101, and the output end of the lifting mechanism 3 is connected to the loading platform 2 via a wire rope 300. The lifting mechanism 3, as the driving core for vertical movement, mainly uses an AC variable frequency motor paired with a planetary gear reducer. The output end of the reducer is connected to the wire rope 300 via a rope drum, thereby achieving the winding and unwinding of the wire rope 300. In practical applications, the lifting mechanism 3 can be controlled to wind up and unwind the wire rope 300, thereby raising and lowering the loading platform 2.

[0031] Combination Figure 1 and Figure 2 It is evident that symmetrically mounted clamps 201 are installed on the surface of the loading platform 2, and a lead screw 203, threadedly connected to the clamps 201, is movably mounted on the bottom of the loading platform 2. Since the lead screw 203 has two threads, each threadedly connected to a corresponding clamp 201, a motor 204 is fixedly mounted on the bottom of the loading platform 2, and the output end of the motor 204 is fixedly connected to the lead screw 203. By controlling the motor 204 to rotate forward and backward, the clamps 201 can be forced to move closer or further apart. Specifically, during the loading process, the motor 204 rotates in the reverse direction, causing the two clamps 201 to move further apart, increasing the distance between them and facilitating the placement of goods on the surface of the loading platform 2. After the goods are placed, the motor 204 drives the lead screw 203 to rotate forward, forcing the two clamps 201 to move closer together and securely clamping the goods, ensuring that the goods will not slip during the vertical transport process with the loading platform 2.

[0032] Based on this, from Figure 2It is clearly visible that the clamp 201 has a threaded connection to an anti-fall bar 202 on one side. Correspondingly, the side of the auxiliary column 102 has multiple equidistant limiting slots 103, each corresponding to the height of each shelf. When the loading platform 2 transports goods to the corresponding height, the motor 204 rotates in the opposite direction, causing the clamp 201 to move away from the load. Simultaneously, the clamp 201 pushes the anti-fall bar 202 towards the limiting slot 103 until it is inserted into the slot. The extension of the anti-fall bar 202 prevents the loading platform 2 from accidentally descending during loading and unloading. This ensures that the loading platform 2 can be stably suspended during loading and unloading. Furthermore, because the limiting slot 103 is rectangular, it facilitates easier insertion of the anti-fall bar 202 into the slot, ensuring a faster and more stable connection between the two.

[0033] Example 2 is a further improvement on Example 1. Please refer to Example 1. Figure 3 , Figure 5 and Figure 6 It can be seen that the inner side of the main column 101 has an adjusting support 4 guided by a round rod, and the side of the adjusting support 4 is provided with equidistantly arranged external teeth 401, the shape of which is an isosceles triangle. Correspondingly, a limiting wheel 207 is fixedly installed on the side of the loading platform 2. When the loading platform 2 drives the limiting wheel 207 to move up and down, the limiting wheel 207 passes the external teeth 401, and the inclined surface has a tendency to push the external teeth 401 to move. Furthermore, a limiting cylinder assembly 6 that cooperates with the adjusting support 4 is movably installed on the outer side of the main column 101. Figure 5 As can be seen, the limiting cylinder assembly 6 includes a cylinder housing 600 fixed to the outside of the main column 101 by a bracket. The piston rod 601, which is sealed and movable inside the cylinder housing 600, is relatively fixed to the side of the adjusting support 4 using a connecting block. This ensures that when the adjusting support 4 moves left and right, it can synchronously drive the piston rod 601 to move left and right within the cylinder housing 600. Generally, the cylinder housing 600 is filled with a sufficient amount of hydraulic oil, such as... Figure 5As shown, an oil reservoir 603 is fixedly installed on the outside of the main column 101, located below the cylinder housing 600. The reservoir 603 contains sufficient hydraulic oil, and the cylinder housing 600 and the reservoir 603 are connected by a drain pipe 604 and a suction pipe 605. The suction pipe 605 is equipped with a one-way valve, allowing the hydraulic oil in the reservoir 603 to flow unidirectionally into the cylinder housing 600. When the piston rod 601 compresses the hydraulic oil in the cylinder housing 600, the lubricating oil in the cylinder housing 600 can only flow back to the reservoir 603 through the drain pipe 604. At this time, by controlling the diameter of the drain pipe 604, the speed of the piston rod 601 during its return movement can be limited. For example, when the loading platform 2 moves up or down too fast, the limiting wheel 207 pushes the external gear 401 to drive the adjusting support 4 to move. This causes the adjusting support 4 to drive the piston rod 601 to squeeze the hydraulic oil in the cylinder housing 600. Because the adjusting support 4 moves relatively fast, the lubricating oil in the cylinder housing 600 cannot quickly flow back to the oil reservoir 603 through the drain pipe 604, thereby limiting the movement of the adjusting support 4, and thus limiting the movement speed of the limiting wheel 207 that cooperates with the external gear 401 and the loading platform 2.

[0034] Based on this, combined Figure 6 It is clearly visible that the outer side of the adjusting support 4 has a driving inclined part 402 located on one side of the external tooth 401. Correspondingly, the side of the cargo clamp 201 is movably mounted with a driving push rod 205 pushed by the push spring 206. The driving push rod 205 is T-shaped. Figure 6 As shown, when the two clamps 201 are completely close together, it indicates that there is no cargo clamped on the loading platform 2. At this time, the clamps 201 drive the drive rod 205 to compress the push spring 206, forcing the drive rod 205 to move relatively away from the drive ramp 402. Subsequently, during the up-and-down movement of the loading platform 2, the limiting wheel 207 will push the external tooth 401 to move away from the limiting wheel 207. Combined with... Figure 5 As shown, when the adjusting support 4 pushes the piston rod 601 to squeeze the cylinder housing 600, since there is no power element in the cylinder housing 600 to restore the piston rod 601, the external tooth 401 does not restrict the movement speed of the loading platform 2 during the up and down movement of the limiting wheel 207. This ensures that the up and down movement speed of the loading platform 2 is no longer limited when it is running unloaded.

[0035] Similarly, if goods are placed on the loading platform 2, when the goods are clamped by the clamps 201, the distance between the clamps 201 will be relatively larger than the above-mentioned distance. This causes the drive rod 205 to be pushed by the spring force of the push spring 206 and abut against the drive inclined part 402. The inclined surface of the drive inclined part 402 forces the external tooth 401 to always tend to move in the direction of the limiting wheel 207. That is, the piston rod 601 is synchronously restored by the restoration of the adjusting support 4, ensuring that the limiting wheel 207 will always be in contact with the external tooth 401 during the up and down movement. The external tooth 401 pushes the adjusting support 4 to move, and at the same time, the piston rod 601 moves in the cylinder housing 600, thereby limiting the actual up and down movement speed of the loading platform 2, thus avoiding the loading platform 2 from moving too fast during the loading process.

[0036] Example 3 is a further improvement on Example 2. Example 3 can be implemented alone or used in conjunction with Example 2. Please refer to [link / reference]. Figures 3-5 It can be seen that a reversing wheel frame 5 for reversing the wire rope 300 is movably installed on the top of the main column 101, and the reversing wheel frame 5 can move up and down along the top of the main column 101. Under normal conditions, it is pulled downward by the wire rope 300, forcing the reversing wheel frame 5 to have a downward tendency. A detection wheel 501 is movably installed at the bottom of the reversing wheel frame 5. Correspondingly, an overload protection seat 8, which is pushed by an overload spring 801, is movably installed on the top of the main column 101. The side shape of the overload protection seat 8 is a right-angled triangle. When the reversing wheel frame 5 is pulled downward by the wire rope 300, it will cause the detection wheel 501 to abut against the inclined surface. As the downward pressure of the detection wheel 501 increases, it will further squeeze the inclined surface of the overload protection seat 8, forcing the overload protection seat 8 to compress the overload spring 801. Because there are multiple overload springs 801 with a large elastic coefficient, they have sufficient strength to drive the overload protection seat 8 to move. Thus, the overload force of the overload springs 801 can be used to detect whether the wire rope 300 is overloaded. When the wire rope 300 is under normal force, the detection wheel 501 always rests against the inclined surface of the overload protection seat 8. When the wire rope 300 is overloaded, the downward pressure of the detection wheel 501 increases, pushing the inclined surface of the overload protection seat 8 to compress the overload springs 801 until the detection wheel 501 descends and touches the straight section at the bottom of the overload protection seat 8.

[0037] Based on this, through Figure 5It can be seen that the top of the adjusting support 4 has a detection seat 7 bolted on, and the top of the detection seat 7 has a partial slope, the angle of which corresponds to that of the overload protection seat 8. Under normal conditions, the slopes of both the detection seat 7 and the overload protection seat 8 abut against the detection wheel 501. Thus, the detection wheel 501 restricts the detection seat 7, preventing the adjusting support 4 from moving excessively to the left. Simultaneously, a retaining ring 602 is movably and sealingly installed inside the limiting cylinder assembly 6, and the retaining ring 602 and the piston rod 601 are movably connected by a connecting rod. Figure 5 As shown, when the piston rod 601 moves to the right, since the retaining ring 602 has already moved to its right limit, the connecting rod on the retaining ring 602 will move relative to the right-moving piston rod 601. Similarly, when the piston rod 601 moves to the left and reaches the end of the connecting rod, it will pull the retaining ring 602 according to the connecting rod, ultimately causing the retaining ring 602 to block the oil drain pipe 604. The limited-motion cylinder assembly 6 is also equipped with an oil drain assembly, which ensures that after the retaining ring 602 blocks the oil drain pipe 604, the lubricating oil in the cylinder housing 600 can be released externally by manually adjusting the oil drain assembly.

[0038] In practical applications, during normal cargo transport, the wire rope 300 pulls the reversing wheel frame 5 downwards, causing the detection wheel 501 to abut against the inclined surfaces of the overload protection seat 8 and the detection seat 7. Since the detection wheel 501 can restrict the leftward movement of the detection seat 7 at this time, it ensures that during normal handling, the piston rod 601 will not move excessively to the left and cause the retaining ring 602 to block the oil drain pipe 604. Afterwards, the loading platform 2 is moved up and down using the wire rope 300 to complete the handling of the cargo on the loading platform 2. During handling, the clamping and securing between the clamps 201 and the suspension limiting of the anti-fall bar 202 inserted into the limiting groove 103 are consistent with the content in Embodiment 2 above, and will not be repeated here.

[0039] When the cargo on the loading platform 2 is overloaded, the downward force of the reversing wheel frame 5 increases, which pushes the overload protection seat 8 towards the overload spring 801 based on the inclined plane, and compresses the overload spring 801. At the same time, the downward-moving detection wheel 501 compresses the inclined plane of the detection seat 7 synchronously. After the detection wheel 501 moves downward and passes the inclined plane of the detection seat 7, the detection wheel 501 will no longer restrict the movement of the detection seat 7. Then, after the limiting wheel 207 passes the external tooth 401, the drive rod 205, which is subjected to the elastic force of the push spring 206, abuts against the drive inclined part 402, forcing the drive inclined part 402 to push the adjusting support 4 further towards the limiting wheel 207. During this process, the adjusting support 4 will drive the piston rod 601 to move further away from the retaining ring 602. After the piston rod 601 reaches the connecting rod end of the retaining ring 602, it pulls the retaining ring 602 to the left based on the connecting rod and blocks the oil drain pipe 604. During this process, as the piston rod 601 moves to the left, the oil suction pipe 605 continuously draws hydraulic oil from the oil reservoir 603, keeping the hydraulic oil in the cylinder housing 600 full. Then, as the loading platform 2 descends further, the limiting wheel 207 abuts against the inclined surface of the external tooth 401. However, when the adjusting support 4 moves away from the limiting wheel 207, it compresses the hydraulic oil in the cylinder housing 600 via the piston rod 601. Since there is no flow channel between the cylinder housing 600 and the oil reservoir 603, the incompressible hydraulic oil prevents the adjusting support 4 from moving away from the limiting wheel 207, thus locking the movement of the limiting wheel 207 and ensuring the loading platform 2 is suspended at its designated height. The advantage of this design is that, on the one hand, it prevents the loading platform 2 from being overloaded; on the other hand, it... Figure 1 and Figure 2 It is clearly visible that the limiting groove 103 is a rectangular groove. When the loading platform 2 is suspended at the required height, the cargo clamp 201 is inserted into the inner bottom of the limiting groove 103 to ensure that the loading platform 2 has sufficient support. After the goods are loaded, the lifting mechanism 3 only needs to pull the wire rope 300 to move upward first, and the loading platform 2 pulls the anti-fall bar 202 upward along the limiting groove 103. During this process, if the loading platform 2 is overloaded, although the lifting mechanism 3 still has the tendency to pull the loading platform 2 upward, the detection wheel 501 will also pass over the partial slope of the detection seat 7. Afterwards, when the cargo clamps 201 approach each other and clamp the goods, although the anti-fall bar 202 is disengaged from the limiting groove 103, the adjusting support 4 is pushed by the drive rod 205 to move the adjusting support 4 further towards the limiting wheel 207, and realizes the above-mentioned blocking ring 602 to block the oil drain pipe 604. This prevents the overloaded loading platform 2 from moving up and down normally. Subsequently, the motor 204 rotates in the opposite direction, causing the anti-fall bar 202 to re-insert into the limit groove 103. The limit groove 103 then restricts the downward movement of the loading platform 2, preventing it from falling when overloaded.

[0040] Therefore, it can be seen that this method can ensure that after the loading platform 2 is overloaded, it can be smoothly restored to the corresponding shelf position based on the restriction between the anti-fall bar 202 and the limit groove 103, so that the overloaded loading platform 2 can be safely unloaded. This avoids the situation where the loading platform 2 falls due to overload, and the goods on the loading platform 2 are lower than the container, making it impossible to return the goods.

[0041] When the wire rope 300 breaks after prolonged use, it releases the downward pressure of the reversing wheel frame 5. At this point, the reversing wheel frame 5 will no longer restrict the movement of the detection seat 7. When the adjusting support 4 drives the piston rod 601 to move away from the retaining ring 602, the local inclined surface on the detection seat 7 pushes the detection wheel 501 upward. Then, as the piston rod 601 pulls the retaining ring 602, it blocks the oil drain pipe 604, thus achieving the locking and limiting purpose of the loading platform 2 mentioned above. This ensures that the equipment can automatically lock itself after the wire rope 300 breaks unexpectedly, preventing a sudden drop.

Claims

1. A twin column stacker for an intelligent warehousing system, characterized in that, Include: Walking mechanism (1), the surface is arranged symmetrically with the main column (101) and the auxiliary column (102) that the vertical guide limit of the loading platform (2) is carried out; The main column (101) side fastening installation has a lifting mechanism (3), the steel wire rope (300) set on the output end of the lifting mechanism (3) can pull the loading platform (2) up and down movement; The loading platform (2) surface symmetry movable installation has goods clamp (201), two goods clamp (201) are driven by the screw rod (203) of motor (204) and carry out position adjustment, and realize goods clamp (201) relative far away / close; Goods clamp (201) one side screw connection has anti-falling rod (202), and the auxiliary column (102) side is provided with the limit slot (103) matched with it; Goods clamp (201) relative close, realize the clamping of goods on the loading platform (2); goods clamp (201) relative far away, anti-falling rod (202) is inserted into limit slot (103) and realizes the hover of loading platform (2); The inside of main column (101) movable installation has adjustment support (4), and the outside of adjustment support (4) is provided with external gear (401), and the side of loading platform (2) is fixedly installed with limit wheel (207), and the outside of main column (101) movable installation has limit cylinder assembly (6) matched with adjustment support (4); The shape of external gear (401) is isosceles triangle; Limit cylinder assembly (6) includes: Oil cylinder shell (600) is fixed on the outside of main column (101); the inside of oil cylinder shell (600) is sealed and movably sleeved with piston rod (601) and the side of adjustment support (4) is fixedly connected; Oil can (603) is fixed on the outside of main column (101), is provided with hydraulic oil in the inside, and oil cylinder shell (600) and oil can (603) are connected by oil drain pipe (604) and oil suction pipe (605) between them, and one-way valve is provided in oil suction pipe (605); The outside of adjustment support (4) is provided with drive inclined part (402) on one side of external gear (401), and the side of goods clamp (201) is movably installed with drive top rod (205) pushed by push spring (206).

2. The twin column stacker for intelligent warehousing system as claimed in claim 1 wherein, Limit slot (103) is rectangular slot.

3. The twin column stacker for intelligent warehousing system as claimed in claim 1 wherein, The top of main column (101) movable installation has reversing wheel frame (5) for reversing steel wire rope (300), and detection wheel (501) is movably installed on the bottom of reversing wheel frame (5), and overload protection seat (8) is pushed by overload spring (801) and is movably installed on the top of main column (101).

4. The twin column stacker for the intelligent warehousing system as claimed in claim 3 wherein, The side shape of overload protection seat (8) is right triangle.

5. The twin column stacker for intelligent warehousing system as claimed in claim 3 wherein, The top of adjustment support (4) has detection seat (7) fastened by bolt, and the top of detection seat (7) is provided with local inclined surface, and stop ring (602) is movably installed in the inside of limit cylinder assembly (6), and stop ring (602) and piston rod (601) are movably connected by connecting rod between them.

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