Stereoscopic warehouse lifting device for road transportation
By introducing a buffer mechanism and a mechanical linkage design between the drive mechanism into the lifting device, and using springs and dampers to provide instant braking force, the problem of high-speed falls in abnormal situations of existing devices is solved, and safe and reliable lifting operations are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-03
AI Technical Summary
Existing lifting devices lack multiple redundant fall prevention mechanisms and cannot effectively cope with the risk of sudden falls caused by overload, power outages, or mechanical failures, seriously threatening the safety of personnel, goods, and equipment.
A lifting device comprising a support frame, a control host, a control mechanism, and a buffer mechanism was designed. The buffer mechanism and the lifting drive mechanism are mechanically linked through a gear transmission assembly, and a continuous braking force is provided by a spring telescopic rod and a damper to prevent the goods from falling at high speed.
In abnormal situations, the buffer mechanism responds immediately, effectively absorbing the impact energy of the fall, preventing equipment and goods from falling at high speed, improving equipment safety, reducing damage and personnel risks, and featuring a compact and reliable structure with simple maintenance.
Smart Images
Figure CN121778637A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of road transportation technology, specifically to a lifting device for automated warehouses used in road transportation. Background Technology
[0002] Automated storage and retrieval systems (AS / RS) for road transport are high-density storage facilities specifically designed for the road transport industry. They maximize storage capacity through vertical space utilization and are typically equipped with automated equipment to achieve efficient storage, retrieval, and management of goods. Stacker cranes with lifting mechanisms are used because AS / RS require full utilization of vertical space. The lifting function of stacker cranes can quickly and accurately transport goods to different levels of shelving, significantly improving warehousing efficiency and space utilization, while reducing human error and labor costs, thus meeting the high demands of the road transport industry for cargo turnover speed and storage capacity.
[0003] Existing stacker cranes, or lifting devices, often lack reliable safety lifting structures during the vertical transport of goods. This design flaw makes them highly susceptible to sudden falls when carrying overweight cargo or encountering abnormal conditions such as power fluctuations or mechanical failures. Due to the lack of effective fall protection mechanisms (such as mechanical self-locking devices, hydraulic safety valves, or redundant braking systems), once a stacker crane becomes unstable, heavy objects may fall at high speed in free fall, causing severe damage to goods, deformation of the racking structure, and potentially triggering a chain reaction of equipment failures or even system-wide failure. More seriously, the enormous impact and flying debris generated during the fall can cause fatal injuries to on-site operators, while also significantly increasing secondary risks such as fires and power outages. Furthermore, such accidents can disrupt warehousing operations, delay the supply chain, and result in substantial economic losses and reputational damage. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a lifting device for automated warehouses used in road transportation. This device solves the problem that most existing technologies lack multiple redundant anti-fall mechanisms, making them unable to effectively cope with the risk of sudden falls caused by overloading, power outages, or mechanical failures, which seriously threaten the safety of personnel, goods, and equipment.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting device for a road transport automated warehouse, comprising a support frame, a control host with a drive control circuit, a control mechanism, and at least one buffer mechanism. The control mechanism has a base fixed to the side of the control host, a motor mounted on the base, a threaded rod vertically arranged driven by the motor, a threaded sleeve threadedly engaged with the threaded rod, a support plate fixedly connected to the threaded sleeve, and lifting forks mounted on the support plate; the upper end of the threaded rod is rotatably connected to the support frame, and the output shaft of the motor drives the threaded rod to rotate through a gear transmission assembly; The buffer mechanism includes an internally threaded sleeve rotatably mounted on the base, an externally threaded sleeve threadedly engaged with the internally threaded sleeve, a spring telescopic rod disposed within the externally threaded sleeve, a damper connected to the top of the spring telescopic rod, and a connecting plate fixedly connected to the damper and the support plate; the internally threaded sleeve is linked to the threaded rod through the gear transmission assembly, so that the rotation of the internally threaded sleeve is synchronized with the rotation of the threaded rod.
[0006] Preferably, the gear transmission assembly includes a second gear fixed on the output shaft of the motor, a first gear fixed on the threaded rod and meshing with the second gear, and a third gear fixed on the outer surface of the internal threaded sleeve and meshing with the first gear.
[0007] Preferably, there are two buffer mechanisms, with the internal threaded sleeves of the two buffer mechanisms symmetrically distributed on both sides of the threaded rod. The two internal threaded sleeves are located at the front and rear ends of the base away from the control host, and the threaded rod is located in the middle between the two internal threaded sleeves.
[0008] Preferably, the buffer mechanism further includes an extension plate that is rotatably sleeved on the upper end of the internal threaded sleeve via a bearing, and a limiting rod that movably passes through the extension plate and is fixedly connected at its upper end to the connecting plate.
[0009] Preferably, the support plate is provided with a limiting slider, the support frame is provided with a limiting slide rail that slides with the limiting slider, and a bottom insert rod is fixed to the lower side of the control host, with an auxiliary wheel installed at the lower end of the bottom insert rod.
[0010] Preferably, an electrically controlled wheel is installed at the lower part of the control host, and the connecting plate is fixedly connected to the support plate by bolts.
[0011] Preferably, the control host is equipped with a rechargeable battery for supplying power to the motor and the drive control circuit.
[0012] This invention provides a lifting device for automated warehouses used in road transportation. It has the following advantages: This invention provides a lifting device for automated warehouses used in road transport. This technology integrates the buffer mechanism and the lifting drive mechanism through mechanical linkage, achieving dynamic and synchronous safety protection. Its core advantage lies in transforming traditional passive static buffering into active, follow-up protection. When the motor drives the threaded rod to rotate and lift the lifting forks and support plate, the first gear synchronously drives the internal threaded sleeves of the buffer mechanisms on both sides to rotate, forcing the buffer assembly composed of the external threaded sleeve, spring telescopic rod, and damper to rise synchronously. This ensures that the buffer mechanism always maintains a preset relative position with the forks. In the event of drive failure, thread damage, or unexpected power outage, etc., the device will provide protection. When the forks drop, the rigidly connected buffer mechanism plate immediately pulls the damper and spring telescopic rod. Through the compression of the spring and the energy dissipation of the damper, it instantly provides continuous and flexible braking force, effectively absorbing the impact energy of the fall and preventing goods and equipment from falling at high speed in a free-fall manner. This greatly improves the inherent safety of the equipment under abnormal operating conditions such as overload and power fluctuations. At the same time, this integrated design does not require complex independent sensors or electronic locking devices. The structure is compact and reliable, and the maintenance is simple. While ensuring that the efficiency of goods storage and retrieval and the space utilization of the automated warehouse are not affected, it comprehensively reduces the risks of equipment damage, goods damage and personnel safety. Attached Figure Description
[0013] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a schematic diagram of the bottom surface of the present invention; Figure 3 This is a schematic diagram of the front section of the present invention; Figure 4 This is a schematic diagram of the combination of the control mechanism and the buffer mechanism of the present invention; Figure 5 This is a schematic diagram of the buffer mechanism of the present invention; Figure 6 This is a cross-sectional schematic diagram of the buffer mechanism of the present invention.
[0014] The components are as follows: 1. Support frame; 2. Control host; 3. Bottom insert rod; 4. Control mechanism; 41. Lifting fork; 42. Support plate; 43. Limiting slider; 44. Threaded rod; 45. Motor; 46. Base; 47. Threaded sleeve; 48. Gear No. 1; 49. Gear No. 2; 5. Buffer mechanism; 51. Connecting plate; 52. Limiting rod; 53. Extension plate; 54. Damper; 55. Spring telescopic rod; 56. Internal threaded sleeve; 57. Gear No. 3; 58. External threaded sleeve. Detailed Implementation
[0015] 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.
[0016] like Figure 1-6 As shown, this embodiment of the invention provides a lifting device for a road transport automated warehouse, including a support frame 1, a control host 2 with a drive control circuit, a control mechanism 4, and at least one buffer mechanism 5. The control mechanism 4 has a base 46 fixed to the side of the control host 2, a motor 45 mounted on the base 46, a threaded rod 44 driven by the motor 45 and vertically arranged, a threaded sleeve 47 threadedly engaged with the threaded rod 44, a support plate 42 fixedly connected to the threaded sleeve 47, and a lifting fork 41 mounted on the support plate 42; the upper end of the threaded rod 44 is rotatably connected to the support frame 1, and the output shaft of the motor 45 drives the threaded rod 44 to rotate through a gear transmission assembly; The buffer mechanism 5 includes an internally threaded sleeve 56 rotatably mounted on the base 46, an externally threaded sleeve 58 threadedly engaged with the internally threaded sleeve 56, a spring telescopic rod 55 disposed inside the externally threaded sleeve 58, a damper 54 connected to the top of the spring telescopic rod 55, and a connecting plate 51 fixedly connected to the damper 54 and the support plate 42; the internally threaded sleeve 56 is linked with the threaded rod 44 through a gear transmission assembly, so that the rotation of the internally threaded sleeve 56 is synchronized with the rotation of the threaded rod 44.
[0017] The gear transmission assembly includes a second gear 49 fixed on the output shaft of the motor 45, a first gear 48 fixed on the threaded rod 44 and meshing with the second gear 49, and a third gear 57 fixed on the outer surface of the internal threaded sleeve 56 and meshing with the first gear 48.
[0018] There are two buffer mechanisms 5. The internal threaded sleeves 56 of the two buffer mechanisms 5 are symmetrically distributed on both sides of the threaded rod 44. The two internal threaded sleeves 56 are located on the front and rear ends of the base 46 away from the control host 2. The threaded rod 44 is located in the middle between the two internal threaded sleeves 56.
[0019] The buffer mechanism 5 also includes an extension plate 53 that is rotatably sleeved on the upper end of the internal threaded sleeve 56 via a bearing, and a limiting rod 52 that movably passes through the extension plate 53 and is fixedly connected at its upper end to the connecting plate 51.
[0020] The support plate 42 is provided with a limiting slider 43, and the support frame 1 is provided with a limiting slide rail that slides with the limiting slider 43. The lower side of the control host 2 is fixed with a bottom plug rod 3, and the lower end of the bottom plug rod 3 is equipped with an auxiliary wheel.
[0021] The lower part of the control host 2 is equipped with an electric control wheel, and the connecting plate 51 is fixedly connected to the support plate 42 by bolts. The control host 2 is equipped with a rechargeable battery for powering the motor 45 and the drive control circuit.
[0022] The implementation of this technology begins with the installation and startup preparation of the equipment. The operator first moves the entire unit to the designated working position in the automated warehouse, providing stable support for the electrically controlled wheels at the bottom of the control unit 2 and the auxiliary wheels at the end of the bottom insert rod 3. The control unit 2 is powered by a rechargeable battery. After starting the system via the control panel, the drive circuit enters standby mode. At this time, the motor 45 in the control mechanism 4 is stationary, the lifting forks 41 remain at their initial height, and the spring telescopic rod 55 and damper 54 of the buffer mechanism 5 are in a naturally extended state. The connecting plate 51 at its top is tightly fixed to the support plate 42 with bolts, forming a complete standby unit. This design ensures that the core safety buffer mechanism is physically connected to the lifting structure before the equipment starts working, requiring no additional activation steps, thus laying a solid foundation for safe operation.
[0023] When goods need to be stored or retrieved, the operator issues a command through the control host 2. The motor 45 starts, and the second gear 49 on its output shaft begins to rotate, driving the first gear 48 meshing with it to rotate. The first gear 48 is fixed to the vertical threaded rod 44, thereby driving the threaded rod 44 to rotate. The threaded sleeve 47, which is threadedly engaged with the threaded rod 44, generates a vertical displacement under the action of rotation, thereby driving the support plate 42 fixed to it and the lifting fork 41 on it to rise or fall smoothly. At the same time, the first gear 48, which is fixed to the same threaded rod 44, also synchronously drives the two third gears 57 meshing with it to rotate. These two third gears 57 are respectively fixed to the outer surface of the internal threaded sleeves 56 of the two buffer mechanisms 5. The rotation of the internal threaded sleeve 56 causes the external threaded sleeve 58, which is threadedly engaged inside it, to generate a corresponding vertical movement, thereby driving the spring telescopic rod 55, damper 54 and top connecting plate 51 inside it to achieve precise synchronous lifting and lowering with the support plate 42 and the fork. This means that the safety buffer device is not stationary, but dynamically follows the movement of the cargo platform, maintaining a constant relative position between the two. This is the core prerequisite for achieving immediate safety response.
[0024] If an abnormal situation occurs during the lifting process, such as a sudden power outage of the motor, accidental damage to the transmission threads, or a control system malfunction, causing the lifting forks 41 to lose power support and begin to fall, the safety mechanism of this technology will be automatically triggered instantly. Since the support plate 42 and the connecting plate 51 of the buffer mechanism 5 are rigidly fixed, the fall of the support plate 42 will immediately pull the connecting plate 51, thereby applying a downward pulling force to the damper 54 and the spring telescopic rod 55. The spring inside the spring telescopic rod 55 begins to be rapidly compressed, while the damper 54 generates strong motion resistance. This process continuously converts the kinetic energy of the fall into the potential energy of the spring and the heat energy of the damper 54. The entire buffering process is directly responded to by the mechanical structure, without any circuit delay or sensor timing, achieving true zero-delay braking. Even better, the linkage design ensures that no matter what height the fork is at before the failure, the buffer mechanism 5 is in the optimal stress-prepared state, providing maximum buffering force from the initial stage, effectively preventing acceleration of the fall, and thus smoothly and controllably stopping the forks, goods and the entire platform in the stroke, preventing catastrophic free fall impact.
[0025] The detailed working principle is as follows: First, the core structure of this technology consists of two buffer mechanisms 5. The connecting plate 51 of the upper part of the buffer mechanism 5 is fixed to the support plate 42 of the control mechanism 4 by bolts. The internal threaded sleeve 56 of the lower part of the buffer mechanism 5 is rotatably set on the upper end of the base 46 of the control mechanism 4. The base 46 of the control mechanism 4 and the motor 45 are both fixed to the side of the control host 2, thereby achieving overall fixation.
[0026] The control host 2 of this technology mainly houses rechargeable batteries, control panels, circuit boards, and other related hardware. A bottom plug 3 is fixed to the lower side of the control host 2, and the bottom plug 3 is located at the lower end of the control mechanism 4. A support frame 1 is fixed to the upper end of the connection between the bottom plug 3 and the control host 2, and the base 46 is also fixed in the middle position of it.
[0027] The lower part of the motor 45 is fixed to the upper end of the base 46 near the control host 2. The output end of the motor 45 is fixed with a second gear 49. Two internal threaded sleeves 56 are located at the front and rear ends of the upper end of the base 46 away from the control host 2. At the same time, a threaded rod 44 is rotatably provided on the upper end of the base 46 in the middle between the two internal threaded sleeves 56. The upper end of the threaded rod 44 is rotatably connected to the support frame 1.
[0028] When the motor 45 is started, the output end of the motor 45 rotates, driving the second gear 49 to rotate. The rotation of the second gear 49 drives the first gear 48, which is fixedly sleeved on the threaded rod 44, to rotate. The rotation of the first gear 48 drives the third gear 57, which is fixedly sleeved on the outer surface of the inner threaded sleeve 56, to rotate, thereby driving the inner threaded sleeve 56 to rotate. During the rotation of the inner threaded sleeve 56, the outer threaded sleeve 58, which is threaded inside the inner threaded sleeve 56, moves up and down. Correspondingly, the spring telescopic rod 55, which is fixed at the bottom inside the outer threaded sleeve 58, and the connecting plate 51, which is connected to the upper end of the spring telescopic rod 55 through the damper 54, also move up synchronously, making the buffer mechanism 5 of this technology more suitable for the up and down lifting of the lifting fork 41. Meanwhile, an extension plate 53 is rotatably sleeved on the upper outer side of the internal threaded sleeve 56 through a bearing, and a limit rod 52 is movably installed through the extension plate 53. The upper end of the limit rod 52 is fixed to the lower end face of the connecting plate 51 to achieve stable rotation of the internal threaded sleeve 56. Furthermore, during the synchronous rotation of the threaded rod 44, a threaded sleeve 47 is threaded on its rod body, which can move up and down, thereby driving the support plate 42 fixed to the threaded sleeve 47 and the lifting fork 41 fixed to the support plate 42 to move up and down, realizing the operation of forklift unloading.
[0029] During this process, limit sliders 43 are provided at both the front and rear ends of the support plate 42 near the control host 2, and corresponding limit rails are provided on the support frame 1 to achieve stable up and down lifting operations. At the same time, the lower end of the control host 2 is provided with corresponding electric control wheels, and the lower end of the bottom plug rod 3 is provided with auxiliary wheels. The specific design of the control host 2 is a matter of existing technology, so it will not be described in detail. The main feature of this technology is to add two buffer mechanisms 5 to the traditional equipment. The buffer mechanisms 5 are not static, but can be adapted to the lifting fork 41 and lift synchronously, playing a more secure role and avoiding dangerous situations caused by sudden damage during lifting.
[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A lifting device for a road transport automated warehouse, comprising a support frame (1), a control host (2) with a drive control circuit, a control mechanism (4), and at least one buffer mechanism (5), characterized in that: The control mechanism (4) has a base (46) fixed to the side of the control host (2), a motor (45) mounted on the base (46), a threaded rod (44) driven by the motor (45) and vertically arranged, a threaded sleeve (47) threadedly engaged with the threaded rod (44), a support plate (42) fixedly connected to the threaded sleeve (47), and lifting forks (41) mounted on the support plate (42); the upper end of the threaded rod (44) is rotatably connected to the support frame (1), and the output shaft of the motor (45) drives the threaded rod (44) to rotate through a gear transmission assembly; The buffer mechanism (5) includes an internal threaded sleeve (56) rotatably mounted on the base (46), an external threaded sleeve (58) threadedly engaged with the internal threaded sleeve (56), a spring telescopic rod (55) disposed in the external threaded sleeve (58), a damper (54) connected to the top of the spring telescopic rod (55), and a connecting plate (51) fixedly connected to the damper (54) and the support plate (42); the internal threaded sleeve (56) is linked with the threaded rod (44) through the gear transmission assembly, so that the rotation of the internal threaded sleeve (56) is synchronized with the rotation of the threaded rod (44).
2. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The gear transmission assembly includes a second gear (49) fixed on the output shaft of the motor (45), a first gear (48) fixed on the threaded rod (44) and meshing with the second gear (49), and a third gear (57) fixed on the outer surface of the internal threaded sleeve (56) and meshing with the first gear (48).
3. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The number of buffer mechanisms (5) is two. The internal threaded sleeves (56) of the two buffer mechanisms (5) are symmetrically distributed on both sides of the threaded rod (44). The two internal threaded sleeves (56) are located on the front and rear ends of the base (46) away from the control host (2). The threaded rod (44) is located in the middle between the two internal threaded sleeves (56).
4. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The buffer mechanism (5) further includes an extension plate (53) that is rotatably sleeved on the upper end of the internal threaded sleeve (56) via a bearing, and a limiting rod (52) that movably passes through the extension plate (53) and is fixedly connected at its upper end to the connecting plate (51).
5. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The support plate (42) is provided with a limiting slider (43), the support frame (1) is provided with a limiting slide rail that slides with the limiting slider (43), the lower side of the control host (2) is fixed with a bottom plug rod (3), and the lower end of the bottom plug rod (3) is equipped with an auxiliary wheel.
6. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The lower part of the control host (2) is equipped with an electric control wheel, and the connecting plate (51) is fixedly connected to the support plate (42) by bolts.
7. The lifting device for a road transport automated warehouse according to claim 1, characterized in that: The control host (2) is equipped with a rechargeable battery for supplying power to the motor (45) and the drive control circuit.