Single-track large-span stacker upper cross beam lifting mechanism

Abstract

The utility model relates to a single track large -span stacker upper crossbeam lifting mechanism belongs to stacker technical field to solve the existing single track double stand column stacker adopts hoist plus wire rope type lifting mechanism, and there is the problem that the upper part occupies the space greatly, leads to the use to be limited by the space, makes the low problem of applicability. The present application includes stand column, lifting assembly and loading platform, two stand columns are set up vertically opposite parallel, and lifting assembly is installed on every stand column respectively, sliding installation has loading platform between two stand columns, lifting assembly includes lifting rope, counterweight, drive wheel and power part, drive wheel rotates and installs in stand column, and it is connected with the power end of power part, lifting rope is set up in drive wheel outside, and its one end is connected with counterweight, and the other end is connected with loading platform. The present application adopts counterweight type lifting assembly, and lifting rope only needs to be installed in stand column, and it is not necessary to set up fixed pulley on upper crossbeam, and the number of components is less, and the component installation space is less, and the product applicability is high.

Description

Technical Field

[0001] This utility model relates to a crossbeam lifting mechanism for a single-track large-span stacker, belonging to the field of stacker technology. Background Technology

[0002] Stacker cranes are the core equipment of automated storage and retrieval systems (AS / RS), using components such as robotic arms, forks, and guide rails to automatically store and retrieve goods. They typically consist of the following parts: 1. Main frame: Supports equipment operation, and is divided into single-column (light load) and double-column (heavy load) structures; 2. Walking mechanism: moves horizontally along the track, with a positioning accuracy of ±1 mm (refer to the "Technical Specifications for Logistics Equipment"). 3. Lifting mechanism: Responsible for vertical lifting, with a speed range typically of 5-60 meters per minute; 4. Fork mechanism: Telescopic design for gripping pallets or bins, with load capacity ranging from 100kg to 3 tons; 5. Loading platform: Equipped with a forklift mechanism for storing goods.

[0003] Existing single-rail double-column stacker cranes typically employ a winch and wire rope lifting mechanism to elevate the loading platform located between the two columns. The wire rope needs to be redirected via pulley blocks at the top of the columns. For existing large-span stacker cranes, to lift long goods (at least 12m in length), multiple fixed pulleys are required on the upper crossbeam between the columns to ensure the wire rope's direction. Furthermore, the heavy load of long goods further increases the load-bearing requirements of the wire rope, pulley blocks, and fixed pulleys, necessitating the use of appropriately sized heavy-duty components. This results in a large space occupation by the upper components of the stacker crane. In aisle-style automated warehouses or warehouses with limited upper space, the use of conventional single-rail double-column stacker cranes is restricted. Therefore, a new upper crossbeam lifting mechanism for single-rail large-span stacker cranes is needed to address the problem of existing single-rail double-column stacker cranes using winch and wire rope lifting mechanisms, which result in large upper component space occupation, limiting their usability and overall suitability. Utility Model Content

[0004] The purpose of this utility model is to provide a crossbeam lifting mechanism for a single-rail, large-span stacker crane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-rail large-span stacker crane upper beam lifting mechanism, comprising columns, lifting components, and a loading platform. Two columns are arranged vertically and parallel to each other, and each column is equipped with a lifting component. A loading platform is slidably installed between the two columns. The lifting component includes a lifting rope, a counterweight, a drive wheel, and a power component. The drive wheel is rotatably mounted on the column and connected to the power end of the power component. The lifting rope is sleeved on the outside of the drive wheel, with one end connected to the counterweight and the other end connected to the loading platform.

[0006] Specifically, an upper crossbeam connects the tops of the two columns.

[0007] Specifically, the upper crossbeam has a square cross-section, and its vertical side length is defined as A mm; the distance between the two columns is B mm, and the ratio of A to B is 33:1275.

[0008] Specifically, the counterweight is installed on the side of the column away from the loading platform; the drive wheel includes a main drive wheel and a driven wheel; the main drive wheel and the driven wheel are respectively rotatably installed on the top of the column, and the main drive wheel is connected to the power end of the power unit.

[0009] Specifically, the main drive wheel and the driven wheel are coaxial dual-wheel structures, and there are two main drive wheels and two driven wheels. The main drive wheel is located directly above the column and near the counterweight side, and the driven wheel is located directly above the column and near the loading platform side. Rotary shafts are rotatably installed on the column at positions corresponding to the main drive wheel and the driven wheel. The two main drive wheels and the two driven wheels are fixedly installed on the rotating shafts, and the power end of the power unit is connected to the rotating shaft where the main drive wheel is located.

[0010] Specifically, the lifting rope is a lifting chain; the main drive wheel and the driven wheel are sprockets; and the power component is a servo motor.

[0011] Specifically, a counterweight frame is fixedly installed on the column located on the counterweight side. The counterweight frame is a hollow frame structure. The counterweight is slidably installed in the hollow frame of the counterweight frame.

[0012] Specifically, the inner sides of the two columns are fixedly mounted with slide rails, and the loading platform is slidably mounted on the slide rails.

[0013] Specifically, buffers are installed on both ends of the upper crossbeam facing the loading platform.

[0014] Specifically, the upper beam lifting mechanism of the monorail large-span stacker crane is also equipped with a control component, which includes a controller, a height sensor, and a speed sensor; height sensors are spaced along the column, and speed sensors are installed at both ends of the loading platform; the height sensor, speed sensor, and power component are electrically connected to the controller.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The single-rail, large-span stacker crane's upper beam lifting mechanism of this application adopts a counterweight-type lifting assembly. By installing lifting assemblies on each column, the gravitational potential energy of the counterweight is utilized to participate in the raising or lowering of the loading platform. This not only reduces the electric drive of the power components but also reduces the number of drive specifications. Furthermore, by using a counterweight-type lifting assembly, the lifting assembly only needs to be installed above the column, eliminating the need for fixed pulleys on the upper beam. This reduces the number of components, minimizes the installation space required for upper components, saves upper space, and improves product applicability.

[0016] 2. Based on the foregoing, the two columns of this application are respectively equipped with lifting components. The load of the loading platform and the goods can be fully borne by the columns. Theoretically, the middle part of the upper beam does not bear the load. This allows the cross-sectional area of ​​the upper beam to be reduced to less than 350mm while ensuring the rigidity of the loading platform. This further reduces the upper space and increases the highest loading position of the loading platform.

[0017] 3. Based on the foregoing, the drive wheel of this application includes two main drive wheels and a driven wheel, and both the main drive wheels and the driven wheel adopt a double-wheel sprocket structure. The lifting rope adopts a lifting chain to form a chain drive structure. This improves the load-bearing capacity of the components and maximizes the efficiency of transmitting the driving force of the servo motor. Compared with the traditional wire rope and pulley drive structure, it can minimize the friction between the lifting rope and the column body, and convert as much of the gravitational potential energy of the counterweight as possible into kinetic energy, thereby effectively reducing motor energy consumption.

[0018] 4. Based on the foregoing, the column of this application has a counterweight frame fixedly installed on the column body located on the counterweight side. The counterweight frame is a hollow frame structure; the counterweight is slidably installed within the hollow frame body of the counterweight frame. Furthermore, slide rails are fixedly installed along the inner sides of the two columns, and the loading platform is slidably installed on the slide rails. This ensures that the counterweight and loading platform can move stably within specific slide rails or hollow frames during movement, preventing them from colliding with the columns, thereby improving the operational stability and safety of the components.

[0019] 5. Based on the foregoing, the upper beam lifting mechanism of the monorail large-span stacker crane of this application is further equipped with a control component, which includes a controller, a height sensor, and a speed sensor. This enables the timely sensing of the operating height and speed data of the loading platform by installing a height sensor on the column and a speed sensor on the loading platform, and feeds this data back to the controller to control the servo motor to drive the operation of the loading platform. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the single-rail large-span stacker crane in this embodiment; Figure 2 This is a schematic diagram of the upper beam lifting mechanism of the monorail large-span stacker crane in this embodiment (the loading platform is not shown). Figure 3 This is an exploded view of the upper beam lifting mechanism of the monorail large-span stacker in this embodiment; Figure 4 This is a schematic diagram of the installation structure of the drive wheel and servo motor of the upper beam lifting mechanism of the monorail large-span stacker in this embodiment.

[0021] In the diagram: 1. Column; 2. Loading platform; 3. Upper crossbeam; 4. Lifting rope; 5. Counterweight; 6. Servo motor; 7. Buffer; 8. Main drive wheel; 9. Driven wheel; 50. Counterweight frame. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] Please see Figures 1-4 This embodiment discloses an upper crossbeam lifting mechanism for a single-rail large-span stacker crane. It is installed on the single-rail large-span stacker crane and includes a column 1, a lifting assembly, and a loading platform 2. Two columns are arranged vertically and parallel to each other. An upper crossbeam 3 connects the tops of the two columns, and a lifting assembly is installed on each column. A slide rail is fixedly installed along the inner sides of the two opposing columns. The loading platform 2 is slidably installed on the slide rail and on the column. The lifting assembly includes a lifting rope 4, a counterweight 5, a drive wheel, and a servo motor 6. The drive wheel is rotatably installed on the column and connected to the power end of the servo motor. The lifting rope is sleeved on the outside of the drive wheel, with one end connected to the counterweight and the other end connected to the loading platform.

[0024] In this embodiment, the upper crossbeam 3 has a square cross-section, and its vertical side length is defined as 330mm; the distance between the two columns 1 is 12750mm. The loading platform in this embodiment can store goods with a maximum length of 12200mm. To prevent the loading platform from directly impacting the upper crossbeam when it reaches the top, buffers 7 are installed on both ends of the upper crossbeam facing the loading platform in this embodiment.

[0025] Furthermore, in this embodiment, the counterweight 5 is installed on the side of the column away from the loading platform; the drive wheel includes a main drive wheel 8 and a driven wheel 9; wherein, the main drive wheel and the driven wheel are coaxial double-wheel structures, both being sprockets, and there are two main drive wheels and two driven wheels; the main drive wheel is located directly above the column and near the counterweight side, and the driven wheel is located directly above the column and near the loading platform side; rotating shafts are rotatably installed on the column at positions corresponding to the main drive wheel and the driven wheel, and the two main drive wheels and the two driven wheels are fixedly installed on the rotating shafts, with the power end of the servo motor connected to the rotating shaft where the main drive wheel is located. In this embodiment, the lifting rope is a lifting chain, adapted to the sprocket structure of the drive wheel.

[0026] In addition, in this embodiment, a counterweight frame 50 is fixedly installed on the column located on the counterweight side. The counterweight frame is a hollow frame structure; the counterweight is slidably installed in the hollow frame of the counterweight frame. To improve the stable operation of the loading platform, the upper beam lifting mechanism of the single-rail large-span stacker crane in this embodiment is also equipped with a control component, which includes a controller, a height sensor, and a speed sensor; height sensors are spaced along the column, and speed sensors are installed at both ends of the loading platform; the height sensors, speed sensors, and power components are electrically connected to the controller.

[0027] Working Principle: In this embodiment, the upper beam lifting mechanism of the monorail large-span stacker crane operates as follows: When the loading platform needs to be raised or lowered to transport goods, the servo motors on the two columns drive the main drive wheels to rotate. The driven wheels rotate under the meshing drive of the lifting chain, which in turn drives the lifting chain to pull the loading platform upward. As the loading platform rises, the counterweight located on the other side of the column descends. The gravitational potential energy of the counterweight can participate in the work of pulling the loading platform upward, thereby reducing the power consumption of the servo motor driving the loading platform upward. Conversely, when the loading platform needs to be lowered to transport goods, the servo motors on the two columns drive the main drive wheels to rotate. The driven wheels rotate under the meshing drive of the lifting chain, which in turn drives the lifting chain to pull the loading platform downward. As the loading platform descends, the counterweight located on the other side of the column rises. At this time, the gravitational potential energy of the loading platform and the goods can participate in the work of pulling the counterweight upward, thereby reducing the power consumption of the servo motor driving the counterweight upward.

[0028] In this embodiment, the upper beam lifting mechanism of the single-rail large-span stacker crane adopts a counterweight lifting assembly. The lifting rope only needs to be installed on the column, eliminating the need for fixed pulleys on the upper beam. This reduces the number of components and the installation space required for upper components, saving space and improving product applicability. Furthermore, the load of the loading platform and goods can be entirely borne by the column, theoretically eliminating the load on the middle section of the upper beam. While ensuring the rigidity of the loading platform, the cross-sectional area of ​​the upper beam can be reduced to less than 350mm², further reducing upper space while increasing the highest loading position of the loading platform.

[0029] In this embodiment, the upper beam lifting mechanism of the monorail large-span stacker crane is equipped with a control component to ensure that the loading platform remains horizontal during ascent and descent, thus guaranteeing operational stability and safety. This control component includes a controller, a height sensor, and a speed sensor. During operation, the height sensor mounted on the columns monitors the loading platform's running height data in real time. The speed sensor mounted on the loading platform allows the controller to promptly sense the running speed data on both sides of the platform. When the speeds on both sides are asynchronous, the controller adjusts the drive speed of the servo motor on the column of the slower side, ensuring that the drive speeds on both sides of the loading platform remain synchronized, thus maintaining the loading platform's horizontal operation at all times.

[0030] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A single-rail, large-span stacker crane upper beam lifting mechanism, comprising a column, a lifting assembly, and a loading platform, characterized in that: The two columns are arranged vertically and parallel to each other, and each column is equipped with a lifting component; a loading platform is slidably installed between the two columns; the lifting component includes a lifting rope, a counterweight, a drive wheel, and a power component; the drive wheel is rotatably installed on the column and is connected to the power end of the power component; the lifting rope is sleeved on the outside of the drive wheel, with one end connected to the counterweight and the other end connected to the loading platform.

2. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 1, characterized in that: A top beam connects the tops of the two columns.

3. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 2, characterized in that: The upper crossbeam has a square cross-section, and its vertical side length is defined as A mm; the distance between the two columns is B mm, and the ratio of A to B is 33:1275.

4. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 1, characterized in that: The counterweight is installed on the side of the column away from the loading platform; the drive wheel includes a main drive wheel and a driven wheel; the main drive wheel and the driven wheel are respectively rotatably installed on the top of the column, and the main drive wheel is connected to the power end of the power component.

5. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 4, characterized in that: The main drive wheel and driven wheel are coaxial dual-wheel structures, and there are two main drive wheels and two driven wheels. The main drive wheel is located directly above the column and near the counterweight side, and the driven wheel is located directly above the column and near the loading platform side. Rotary shafts are rotatably installed on the column at positions corresponding to the main drive wheel and the driven wheel. The two main drive wheels and the two driven wheels are fixedly installed on the rotating shafts. The power end of the power unit is connected to the rotating shaft where the main drive wheel is located.

6. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 4, characterized in that: The lifting rope is a lifting chain; the main drive wheel and the driven wheel are sprockets; the power component is a servo motor.

7. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 4, characterized in that: The column located on the counterweight side is fixedly equipped with a counterweight frame, which is a hollow frame structure; the counterweight is slidably installed in the hollow frame of the counterweight frame.

8. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 1, characterized in that: The inner sides of the two columns are fixedly mounted with slide rails, and the loading platform is slidably mounted on the slide rails.

9. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 2, characterized in that: The upper crossbeam has buffers installed at both ends of the beam facing the loading platform.

10. The upper beam lifting mechanism of a single-rail large-span stacker according to claim 1, characterized in that: The upper beam lifting mechanism of the monorail large-span stacker is also equipped with a control component, which includes a controller, a height sensor, and a speed sensor; height sensors are spaced along the column, and speed sensors are installed at both ends of the loading platform; the height sensor, speed sensor, and power component are electrically connected to the controller.

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