Hoisting mechanism and stacker

Abstract

The utility model relates to hoisting equipment technical field especially is a kind of hoisting mechanism and stacker.The hoisting mechanism includes: mounting plate;Drive module, including the first drive source and second drive source being located at the both sides of mounting plate and the output shaft being connected with the output end of first drive source and the output end of second drive source;Drum, is set to the output shaft and is located between first drive source and second drive source;Drum is set as winding traction rope;Fixed module, and mounting plate fixed connection.The utility model has the advantages of improving the reliability of lifting equipment and effectively avoiding the whole machine shutdown problem caused by single point failure.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a lifting mechanism and a stacker crane. Background Technology

[0002] As the core power unit of the stacker crane, the lifting mechanism is an integrated assembly of key components such as the lifting motor, drum, bearing support, drum cover, brake, and wire rope. The motor drives the drum to wind up or release the wire rope, precisely driving the loading platform to complete the vertical lifting movement. It is the core actuator that ensures the vertical transportation of materials.

[0003] In conventional warehousing projects, the hoisting mechanism typically adopts the classic "single motor, single drum" configuration, consisting of one hoisting motor paired with one set of drum, bearing supports, and drum guards. This solution is simple in structure and cost-effective, meeting the basic lifting needs of ordinary warehousing. However, it has significant shortcomings in equipment reliability and operational maintenance response. When the hoisting motor fails due to prolonged high-load operation, electrical faults, or mechanical wear, it will directly cause the entire stacker crane to stop, thereby interrupting the warehousing operation process. If a spare part of the same model of motor is available on site, maintenance personnel need to first use hoisting equipment to disassemble the drum cover, remove the motor fixing bolts, and then hoist and replace the new motor and recalibrate the installation accuracy. The whole process takes at least several hours, which not only consumes a lot of manpower but also seriously affects the efficiency and flow target of goods entering and leaving the warehouse on the same day. If there are no spare motors on site, the hoisting motors commonly used in the warehousing industry are mostly imported brands such as SEW and Nord. Their procurement requires multiple steps such as order confirmation, international logistics, and customs clearance. It usually takes more than two months or even longer from placing an order to receiving the spare parts. During this period, the stacker crane cannot operate normally, which will have a continuous impact on the efficiency of warehouse turnover.

[0004] For industries with extremely high requirements for operational continuity, such as production line-integrated warehousing, which cannot tolerate long-term downtime, an additional stacker crane is often required as a backup to mitigate the risk of single-motor failure, employing a "one in use, one in standby" redundancy scheme. However, this approach requires additional investment in equipment procurement, installation, commissioning, and site occupancy costs, resulting in significant waste of funds and resources. Furthermore, the long-term idleness of the backup equipment can lead to low asset utilization. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model discloses a lifting mechanism and a stacker crane.

[0006] The technical solution adopted in this utility model is as follows: Firstly, a lifting mechanism is provided, comprising: Mounting plate; The drive module includes a first drive source and a second drive source disposed on both sides of the mounting plate, and an output shaft whose ends are connected to the output ends of the first drive source and the second drive source. A drum is sleeved on the output shaft and disposed between the first drive source and the second drive source; the drum is configured to wind a traction rope. The fixed module is fixedly connected to the mounting plate.

[0007] In one embodiment of this utility model, the first driving source and the second driving source are symmetrically arranged about the central axis of the mounting plate.

[0008] In one embodiment of this utility model, the output shaft is provided with connecting keys at both ends; the output shaft is connected to the first drive source output end and the second drive source output end through the connecting keys.

[0009] In one embodiment of this utility model, the output shaft is fixedly connected to the mounting plate via a bearing seat.

[0010] In one embodiment of this utility model, the fixing module includes a support fixedly connected to the mounting plate and a column fixedly connected to the support.

[0011] In one embodiment of this utility model, the mounting plate and the support are connected by fasteners.

[0012] In one embodiment of this utility model, the fastener is provided with a cushioning pad.

[0013] In one embodiment of this utility model, the position of the support on the column is adjustable.

[0014] In one embodiment of this utility model, both the first drive source and the second drive source are servo motors or frequency converters with hollow shafts.

[0015] Secondly, a stacker crane is provided, including the lifting mechanism as described above.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The lifting mechanism described in this utility model achieves power redundancy through a symmetrical layout of dual drive sources. Even if a single drive source fails, the mechanism can still maintain normal operation, thereby significantly reducing the risk of interruption in warehousing operations. It has the advantages of improving equipment reliability and reducing downtime. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the driving module in this utility model.

[0019] Figure 2 This is a schematic diagram of the lifting mechanism in this utility model.

[0020] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] Explanation of reference numerals in the accompanying drawings: 10, First drive source; 20, Second drive source; 30, Output shaft; 301, Connecting key; 302, Bearing housing; 40, Drum; 401, Drum cover; 50, Mounting plate; 60, Fastener; 601, Buffer pad; 70, Support; 80, Column. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0023] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present utility model. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0024] In traditional stacker crane lifting mechanisms, the single-drive-source architecture presents a significant risk of single-point failure. When the lifting motor fails due to electrical faults or mechanical wear, the entire vertical lifting function is immediately interrupted, rendering the loading platform unable to perform material transport tasks. This problem stems from the uniqueness of the power transmission path; the system lacks redundant power sources to maintain basic operational capabilities under fault conditions, thus making operational continuity entirely dependent on the reliability of a single drive unit. Furthermore, the system reliability index continuously decreases due to the cumulative probability of single-point failures, fundamentally restricting maintenance response efficiency and compromising the stability of warehousing operations.

[0025] If the aforementioned single point of failure issues are not resolved, the system will remain in a high-risk operating state for an extended period. Specifically, downtime caused by drive source failure will occur repeatedly, leading to a continuous deterioration in warehouse turnover efficiency. Simultaneously, the mandatory configuration of backup equipment creates structural redundancy in fixed modules and mounting plates, increasing the overall system mass and space occupancy, further exacerbating stress concentration on the mounting plates. Consequently, the lifting mechanism's inability to maintain functionality under single drive source failure conditions will completely disable the mechanism ensuring continuous vertical lifting movement, ultimately posing a serious threat to the long-term stable operation of the warehouse system.

[0026] In response, this embodiment proposes a lifting mechanism, including: Mounting plate 50; The drive module includes a first drive source 10 and a second drive source 20 disposed on both sides of the mounting plate 50, and an output shaft 30 whose ends are connected to the output ends of the first drive source 10 and the second drive source 20. A drum 40 is sleeved on the output shaft 30 and positioned between the first drive source 10 and the second drive source 20; the drum 40 is configured to wind the traction rope. The fixed module is fixedly connected to the mounting plate 50.

[0027] The mounting plate 50 is configured as a basic support structure to provide a stable mounting platform.

[0028] Specifically, the first drive source 10 and the second drive source 20 refer to the devices that provide power, which can be implemented using DC motors, for example, through independent motor units, mainly so that the other can still drive the output shaft 30 if one fails.

[0029] Output shaft 30 refers to the shaft that transmits power, primarily to transfer power from the drive source to the drum 40. Drum 40 refers to the component that winds the traction rope, which can be sleeved on output shaft 30 and located between the first drive source 10 and the second drive source 20, for example, in a central position, primarily to maintain a uniform load distribution when a single drive source is operating.

[0030] The fixed module refers to the structure that is fixedly connected to the mounting plate 50. It can be achieved by welding or bolting, such as a bracket structure. Its main purpose is to enhance the overall rigidity and suppress vibration.

[0031] Therefore, this embodiment employs a dual-drive-source redundancy architecture. When one drive source fails, the other drive source can still independently drive the drum 40, thereby avoiding stacker crane downtime, ensuring the continuity of warehousing operations, and reducing maintenance time. Furthermore, this architecture effectively addresses the risk of single-point failure, ensuring that the stacker crane can still maintain its vertical lifting function when the drive source fails, thereby improving system reliability and operational continuity.

[0032] The lifting mechanism includes a mounting plate 50, which serves as a stable mounting platform as a basic support structure, ensuring that all components remain precisely aligned during operation and preventing power transmission interruptions due to vibration or displacement. The drive module consists of a first drive source 10 and a second drive source 20, symmetrically arranged on both sides of the mounting plate 50, with their output ends connected via an output shaft 30. A drum 40 is sleeved on the output shaft 30 and located between the first drive source 10 and the second drive source 20, used to wind the traction rope to achieve the vertical lifting movement of the loading platform. The fixing module is fixedly connected to the mounting plate 50, enhancing the overall structural rigidity and suppressing dynamic stress.

[0033] This technical solution effectively addresses the risk of single-point failure through a dual-drive-source redundancy architecture. When either the first drive source 10 or the second drive source 20 fails due to electrical faults or mechanical wear, the other drive source can still independently drive the drum 40 via the output shaft 30, thus maintaining the winding function of the traction rope and preventing the entire stacker crane from shutting down. Therefore, this design achieves continuous operation capability under single-drive-source failure conditions, effectively avoiding warehousing operation interruptions caused by single-point failures, ensuring the continuity of vertical material transportation, and significantly reducing maintenance response time without requiring additional backup stacker crane equipment.

[0034] This embodiment further proposes that the first drive source 10 and the second drive source 20 are symmetrically arranged about the central axis of the mounting plate 50.

[0035] The symmetrical arrangement refers to the mirror distribution of the first drive source 10 and the second drive source 20 on both sides of the central axis of the mounting plate 50. This can be achieved by using a high-precision machined positioning reference surface or a symmetrically distributed set of mounting holes. The purpose is to ensure that the power flow output from the two drive sources acts evenly on the output shaft 30, avoiding torque imbalance caused by positional offset, thereby providing a basic mechanical balance guarantee for the dual drive source system.

[0036] Specifically, the solution in this embodiment strictly limits the first drive source 10 and the second drive source 20 to symmetrical positions on both sides of the central axis of the mounting plate 50, making the first drive source 10 and the second drive source 20 mirror images of each other in spatial coordinates. Thus, when the output shaft 30 transmits power, the radial force and torque are evenly distributed at the geometric center, canceling each other out the centrifugal effect, effectively suppressing the bending deformation tendency of the output shaft 30 and reducing the additional load on the bearing housing 302. At the same time, this symmetrical layout enhances the axial stability of the drum 40 during the winding of the traction rope, prevents the wire rope from being worn unevenly due to the tilting of the force, simplifies the positioning and calibration process during assembly, and reduces the risk of cumulative installation errors.

[0037] This embodiment further proposes that the output shaft 30 is provided with connecting keys 301 at both ends; the output shaft 30 is connected to the output end of the first driving source 10 and the output end of the second driving source 20 through the connecting keys 301.

[0038] Specifically, the connecting key 301 refers to a standardized mechanical key structure, which can be implemented using a flat key connection. Its purpose is to provide a precise keyway fit mechanism, enhance the shear and torsional resistance of the connection parts, and thus resist vibration and load impact during equipment operation. Among them, the mechanical locking function of the connecting key 301 can effectively disperse stress concentration during torque transmission and avoid the risk of connection failure caused by fretting wear.

[0039] Specifically, the solution in this embodiment establishes a direct mechanical coupling relationship between the output shaft 30 and the output ends of the first drive source 10 and the second drive source 20 through the connecting key 301. This allows the vibration and high-load impact generated during equipment operation to be absorbed by the rigid fit of the key structure. The rotational torque of the output shaft 30 is efficiently transmitted to the drive source through the shear surface of the connecting key 301, thereby eliminating the possibility of relative displacement at the connection point and ensuring the continuity and stability of the power transmission path.

[0040] This embodiment further proposes that the output shaft 30 is fixedly connected to the bearing housing 302 and the mounting plate 50.

[0041] Among them, bearing housing 302 refers to the mechanical connection component used to support the output shaft 30 and achieve precise constraint. It can be implemented by using a deep groove ball bearing housing. Its purpose is to provide stable radial positioning and axial limiting functions, while absorbing rotational vibration energy through structural design to avoid stress concentration problems caused by rigid connection.

[0042] Specifically, the output shaft 30 is fixedly connected to the mounting plate 50 via the bearing housing 302. The bearing housing 302 bears the dynamic load when the output shaft 30 transmits driving force, and its internal structure provides precise radial and axial constraints to limit displacement while effectively absorbing vibration and impact during rotation. The mounting plate 50, as a basic support platform, evenly distributes the dynamic load during operation through its fixed connection with the bearing housing 302, enhancing the overall structural rigidity. This combination ensures that the output shaft 30 maintains precise alignment under fluctuating loads, reducing additional friction and wear caused by eccentric motion, thus forming a stable and reliable rotary support system.

[0043] This embodiment further proposes that the fixing module includes a support 70 fixedly connected to the mounting plate 50 and a column 80 fixedly connected to the support 70.

[0044] Among them, support 70 refers to the transition support component used to connect mounting plate 50 and column 80. It can be implemented by adopting L-shaped bracket or welded plate structure, with the purpose of providing a separable connection interface to simplify maintenance operations.

[0045] Column 80 refers to the vertical support component that bears the main load-bearing function. It can be made of I-beams or square steel tubes. The purpose is to ensure the rigidity and stability of the overall structure and to distribute the dynamic load.

[0046] Specifically, this embodiment designs the fixing module as a layered support structure, with the support 70 acting as an intermediate transition piece directly fixed to the mounting plate 50, while the column 80 is fixedly connected to the support 70. This concentrates the vibration load in the support 70 area for localized buffering during equipment operation, preventing direct transmission to the column 80 foundation. During maintenance, only the connection interface between the support 70 and the mounting plate 50 needs to be separated; the fixing structure between the column 80 and the ground does not need to be disassembled. This means that the maintenance process for core components such as the drive module or drum 40 involves only the disassembly and reassembly of a local interface, significantly shortening the operation path and reducing the complexity of recalibration.

[0047] This embodiment further proposes that the mounting plate 50 and the support 70 are connected by fasteners 60.

[0048] Among them, fastener 60 refers to the mechanical component used to realize the detachable connection between mounting plate 50 and support 70. It can be implemented with high-strength bolts. Its purpose is to provide a connection node with elastic deformation capability to absorb the dynamic load generated during equipment operation and avoid the direct transmission of vibration energy.

[0049] Specifically, in this embodiment, the mounting plate 50 and the support 70 are connected by fasteners 60. The mounting plate 50 is a basic component that carries the drive module and the drum 40, and its positional stability directly affects the rotational accuracy of the output shaft 30.

[0050] As a key component of the fixed module, the support 70 is responsible for transferring the load to the column 80 to maintain overall rigidity. During equipment operation, the impact vibration generated by the drum 40 winding the traction rope is partially absorbed by the elastic deformation of the fastener 60, thereby reducing the continuous transmission of vibration energy to the support 70 and column 80, and avoiding structural stress concentration and fatigue damage. At the same time, this connection method allows the mounting plate 50 to be quickly disassembled during maintenance without dismantling the entire fixed module, significantly improving operation and maintenance response capabilities.

[0051] This embodiment further proposes that the fastener 60 is provided with a buffer pad 601.

[0052] Specifically, the buffer pad 601 refers to an elastic element used to absorb vibration and impact energy. It can be made of elastic materials such as rubber, silicone or polyurethane in the form of a ring-shaped pad or sheet structure. Its purpose is to dissipate vibration energy and block the vibration transmission path through the elastic deformation capacity of the material.

[0053] Specifically, the solution in this embodiment integrates a buffer pad 601 on the fastener 60, so that the vibration energy is absorbed by the elastic material of the buffer pad 601 and converted into heat energy during the transmission process, thereby effectively blocking the transmission path of vibration to the mounting plate 50 and the support 70. Since the mounting plate 50 and the support 70 are fixedly connected by the fastener 60, the setting of the buffer pad 601 ensures that the connection interface maintains stable contact under dynamic load, avoiding bolt loosening or metal fatigue caused by vibration accumulation, and reducing impact noise between structural components.

[0054] This embodiment further proposes that the position of the support 70 on the column 80 is adjustable.

[0055] The adjustable position of the support 70 relative to the column 80 means that the installation position of the support 70 relative to the column 80 can be dynamically adjusted. Specifically, this can be achieved by setting an elongated hole on the column 80 and fixing it with fasteners 60, or by using an adjustable height bracket structure. The purpose is to compensate for uneven foundations or manufacturing errors and ensure that the drum 40 is precisely aligned with the output end of the drive source.

[0056] Specifically, the solution in this embodiment allows for adjustable position of the support 70 on the column 80, enabling fine-tuning of the coordinates of the support 70 based on actual on-site conditions during the installation of the fixed module. This adjusts the position of the mounting plate 50, ensuring precise alignment of the axis of the drum 40 with the output ends of the first drive source 10 and the second drive source 20. During equipment maintenance, there is no need to disassemble the fasteners 60 or reinstall the entire fixed module; the lifting mechanism can be quickly calibrated simply by adjusting the position of the support 70 on the column 80.

[0057] This embodiment further proposes that both the first drive source 10 and the second drive source 20 are servo motors or frequency converters with hollow shafts.

[0058] Among them, the servo motor with hollow shaft can be understood as a type of motor structure, in which the output shaft channel is built into the motor body. Specifically, it can be implemented using a hollow shaft design of permanent magnet synchronous or induction motor type, thereby reducing the number of mechanical interfaces and reducing the complexity of operation during maintenance.

[0059] Specifically, in this embodiment, both the first drive source 10 and the second drive source 20 are configured as servo motors with hollow shafts, so that the output shaft 30 is set to pass directly through the hollow shaft channel of the drive source, forming an integrated mechanical connection. When a single drive source fails, maintenance personnel only need to disconnect the fixed connection between the drive source and the mounting plate 50 to pull the faulty drive source axially along the output shaft 30 without disassembling the output shaft 30, thus avoiding the need to recalibrate the installation accuracy. This significantly simplifies the maintenance process and shortens downtime.

[0060] This embodiment further proposes that the lifting mechanism also includes a drum cover 401 that covers the outside of the drum 40. The drum cover 401 protects the drum 40 body and the internal transmission structure, preventing external factors from affecting operational safety and service life.

[0061] Through the above solution, this embodiment can efficiently complete the replacement operation when the drive source fails, avoiding the tedious steps of disassembling the roll cover 401 and recalibrating, thereby greatly reducing maintenance time and ensuring the stable operation of highly continuous warehousing operations.

[0062] This embodiment also discloses a stacker crane, including the aforementioned lifting mechanism.

[0063] It is understood that the core innovation of this embodiment lies in the fact that by symmetrically arranging the first drive source 10 and the second drive source 20 on both sides of the mounting plate 50 and connecting them with the output shaft 30, the continuity of vertical lifting motion is maintained when a single drive source fails, thereby achieving the effect of ensuring the continuity of warehousing operations and significantly reducing maintenance time.

[0064] Specifically, when one of the first drive source 10 or the second drive source 20 fails due to long-term high-load operation, electrical fault, or mechanical wear, the other drive source can immediately and independently drive the output shaft 30, preventing the stacker crane from completely stopping. The drum 40 is located between the two drive sources and can seamlessly receive power transmission from either drive source, ensuring that the traction rope winding operation is not affected by the failure of a single drive source. The connection keys 301 set at both ends of the output shaft 30 enhance the stability of power transmission and make the redundancy switching process smooth and reliable. The fixing module includes a support 70 and a column 80 connected to the mounting plate 50, which can adapt to dynamic load changes when the two drive sources work together. At the same time, the design of the buffer pad 601 between the support 70 and the mounting plate 50 absorbs vibration and shock, ensuring the durability of the redundancy mechanism in long-term operation.

[0065] With the above technical solution, there is no need to configure additional backup equipment. By directly utilizing the inherent redundancy of dual drive sources, the long waiting period for internationally procured spare parts is avoided, and the resource waste caused by the "one-in-use, one-out-of-use" solution is eliminated, enabling the stacker crane to achieve efficient and stable continuous operation in critical warehousing scenarios.

[0066] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A lifting mechanism, characterized in that, include: Mounting plate (50); The drive module includes a first drive source (10) and a second drive source (20) disposed on both sides of the mounting plate (50) and an output shaft (30) whose ends are connected to the output ends of the first drive source (10) and the second drive source (20). A drum (40) is sleeved on the output shaft (30) and located between the first drive source (10) and the second drive source (20); the drum (40) is configured to wind a traction rope; The fixed module is fixedly connected to the mounting plate (50).

2. The lifting mechanism according to claim 1, characterized in that, The first drive source (10) and the second drive source (20) are symmetrically arranged about the central axis of the mounting plate (50).

3. The lifting mechanism according to claim 1, characterized in that, The output shaft (30) is provided with connecting keys (301) at both ends; the output shaft (30) is connected to the output end of the first driving source (10) and the output end of the second driving source (20) through the connecting keys (301).

4. The lifting mechanism according to claim 1, characterized in that, The output shaft (30) is fixedly connected to the mounting plate (50) via a bearing housing (302).

5. The lifting mechanism according to claim 1, characterized in that, The fixing module includes a support (70) fixedly connected to the mounting plate (50) and a column (80) fixedly connected to the support (70).

6. The lifting mechanism according to claim 5, characterized in that, The mounting plate (50) and the support (70) are connected by fasteners (60).

7. The lifting mechanism according to claim 6, characterized in that, The fastener (60) is provided with a buffer pad (601).

8. The lifting mechanism according to claim 6, characterized in that, The position of the support (70) on the column (80) is adjustable.

9. The lifting mechanism according to claim 1, characterized in that, Both the first drive source (10) and the second drive source (20) are servo motors or frequency converters with hollow shafts.

10. A stacker crane, characterized in that, Includes the lifting mechanism as described in any one of claims 1-9.

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