Stacker crane with overload protection
By introducing components such as weighing sensors and electric cylinders into stacker cranes, real-time weight detection and protection of goods are achieved, solving the problems of equipment overload, cargo falling and sudden drops, and improving the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG CNA SYST CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-07
AI Technical Summary
Existing stacker cranes lack overload protection when handling goods, which can easily lead to cable breakage or winch failure, and there is a risk of goods falling or plummeting during the transfer process.
A stacker crane with an overload protection structure was designed, including a detection component, a sliding seat, pulleys, a sliding sleeve, sensors, and an electric cylinder. The weight of the goods is detected in real time by a weighing sensor, an audible and visual alarm sounds an overload warning, and the electric cylinder and rubber stops prevent the goods from falling or plummeting.
It achieves overload protection for the equipment, prevents equipment damage, avoids cargo falling and sudden drops, and improves the safety and reliability of the equipment.
Smart Images
Figure CN224467477U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stacker crane technology, specifically a stacker crane with an overload protection structure. Background Technology
[0002] Stacker cranes are a common type of lifting equipment that relies on rails for movement and are often used for stacking goods in large warehouses.
[0003] Most stacker cranes currently on the market are similar in structure, typically using a winch as the lifting power source. The winch pulls the pallet along the guide column, and after the forks insert into the bottom of the pallet, they are lifted and then retracted, transferring the goods along with the pallet to the pallet. The goods are then transferred via rails. However, in actual use, there are some functional deficiencies and room for improvement. For example, during the handling of goods, there is a lack of awareness of the weight of the goods. When the weight of the goods exceeds the limit and is overloaded, it is easy to cause the steel cable to break or the winch to malfunction, making maintenance relatively troublesome. They also do not have the function of protecting the equipment from overload.
[0004] Now, a novel stacker crane with an overload protection structure is proposed to solve the above problems. Utility Model Content
[0005] The purpose of this utility model is to provide a stacker crane with an overload protection structure to solve the problem mentioned in the background art of not having the function of protecting equipment from overload.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a stacker crane with an overload protection structure, comprising a bottom sliding seat, a top sliding seat above the bottom sliding seat, two sets of vertical guide columns vertically fixedly connected between the bottom sliding seat and the top sliding seat, winches respectively installed on both sides of the top of the bottom sliding seat, multiple sets of pulleys provided at the bottom end of the top sliding seat, a sliding sleeve sleeved on the outside of the vertical guide columns, a steel cable provided between the winch and the sliding sleeve, a support plate horizontally fixedly connected between the two sets of sliding sleeves, a controller fixedly connected to the front end of the bottom sliding seat, and a detection component for preventing equipment overload provided at the top of the support plate.
[0007] The detection assembly includes two sets of inner fixing blocks, which are respectively fixedly connected to the two sides of the top of the support plate. An outer extension sleeve is fitted around the outer side of each inner fixing block. A pre-cut groove is opened inside the inner fixing block, and a first electric cylinder is installed inside the pre-cut groove. Three sets of sensor outer shells are fixedly connected to the top of the outer extension sleeve. A weighing sensor is installed inside the sensor outer shell, and a pad is fixedly connected to the top of the weighing sensor. An audible and visual alarm is fixedly connected to the middle position of the bottom of the support plate.
[0008] As a further technical solution of this utility model, the shape and size of the inner part of the outer extension sleeve are adapted to the shape and size of the outer part of the inner fixing block, and the outer extension sleeve can slide back and forth along the outer part of the inner fixing block.
[0009] As a further technical solution of this utility model, the pre-grooved output end and the outer extension sleeve are fixedly connected, and the inner fixing blocks are symmetrically distributed about the vertical center line of the support plate.
[0010] As a further technical solution of this utility model, there is a gap between the outer shell of the sensor and the pad, and the winch, the audible and visual alarm, the weighing sensor and the controller are electrically connected.
[0011] As a further technical solution of this utility model, an upper fixing frame is provided above the support plate, and a second electric cylinder is installed at the middle position of the top of the upper fixing frame. The output end of the second electric cylinder is fixedly connected to a pressure plate. The two sides of the upper fixing frame are respectively fixedly connected to a sliding sleeve. The vertical center lines of the support plate and the pressure plate coincide. The second electric cylinder and the controller are electrically connected.
[0012] As a further technical solution of this utility model, multiple sets of third electric cylinders are installed inside the vertical guide column, and a push plate is fixedly connected between the output ends of two sets of third electric cylinders. Two sets of rubber blocks are fixedly connected to the outer side of the push plate. Multiple sets of block through slots are opened on the side of the vertical guide column near the sliding sleeve. An acceleration sensor is installed at the middle position of the top of the support plate. The positions and dimensions of the rubber blocks and the block through slots correspond one-to-one. The third electric cylinder, acceleration sensor, and controller are electrically connected.
[0013] Compared with the prior art, the beneficial effects of this utility model are: the stacker crane with overload protection structure not only realizes the function of protecting the equipment from overload, but also realizes the function of pressing the goods to prevent them from falling, and also realizes the function of preventing sudden falls;
[0014] (1) By setting up an audible and visual alarm, an inner fixed block, a pre-grooved slot, an outer extension sleeve, a first electric cylinder, a sensor outer shell, a pad, and a weighing sensor, when in use, the bottom sliding seat and the top sliding seat cooperate with their respective corresponding tracks to move the equipment to the corresponding area. The winch adjusts the height of the support plate by winding and unwinding the steel cable. After reaching the appropriate position, the first electric cylinder extends, extending the outer extension sleeve outward along the inner fixed block. The outer extension sleeve is inserted into the bottom of the wooden pallet. The winch raises the position of the support plate by winding the steel cable, and the goods are lifted slightly. At this time, the first electric cylinder retracts, and the outer extension sleeve brings the goods onto the support plate. The weight of the goods presses on the pad. The weighing sensor inside the sensor outer shell detects the weight of the goods in real time. When the weight exceeds the standard, the audible and visual alarm sounds an alarm. At the same time, the winch slowly lowers the support plate, and the outer extension sleeve retracts to prevent the equipment from being damaged due to overload. This achieves the function of protecting the equipment from overload.
[0015] (2) By setting up an upper fixed frame, a second electric cylinder and a pressure plate, when in use, as the goods are moved to the support plate, before the equipment starts to move, the second electric cylinder on the upper fixed frame pushes the pressure plate down, and the pressure plate presses on the top of the goods to prevent them from falling during the transfer process, thus realizing the function of pressing the goods to prevent them from falling.
[0016] (3) By setting up a third electric cylinder, a push plate, a rubber stop, a stop through groove and an acceleration sensor, when the winch or steel cable has a problem and the support plate falls suddenly, the acceleration sensor senses that the support plate has fallen suddenly, and multiple sets of third electric cylinders extend synchronously. The rubber stop on the push plate extends outward along the stop through groove to block the sliding sleeve and prevent it from falling further, thus realizing the function of preventing sudden fall. Attached Figure Description
[0017] Figure 1 This is a front view structural diagram of the present utility model;
[0018] Figure 2 This is a top-view enlarged structural diagram of the support plate of this utility model;
[0019] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This is a front enlarged structural diagram of the internal fixing block of this utility model;
[0021] Figure 5 This is a partial front view enlarged structural schematic diagram of the vertical guide column of this utility model.
[0022] In the diagram: 1. Bottom sliding seat; 2. Vertical guide column; 3. Winch; 4. Steel cable; 5. Top sliding seat; 6. Pulley; 7. Sliding sleeve; 8. Support plate; 9. Audible and visual alarm; 10. Inner fixed block; 11. Pre-grooved; 12. Outer extension sleeve; 13. First electric cylinder; 14. Sensor outer shell; 15. Pad plate; 16. Weighing sensor; 17. Upper fixed frame; 18. Second electric cylinder; 19. Pressure plate; 20. Third electric cylinder; 21. Push plate; 22. Rubber stop block; 23. Stop block through groove; 24. Accelerometer sensor; 25. Controller. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Example: Please refer to Figure 1-5 A stacker crane with an overload protection structure includes a bottom sliding seat 1, a top sliding seat 5 above the bottom sliding seat 1, two sets of vertical guide columns 2 vertically fixedly connected between the bottom sliding seat 1 and the top sliding seat 5, winches 3 installed on both sides of the top of the bottom sliding seat 1, multiple sets of pulleys 6 at the bottom of the top sliding seat 5, a sliding sleeve 7 sleeved on the outside of the vertical guide columns 2, a steel cable 4 between the winches 3 and the sliding sleeve 7, a support plate 8 horizontally fixedly connected between the two sets of sliding sleeves 7, a controller 25 fixedly connected to the front end of the bottom sliding seat 1, and a detection component that can prevent equipment overload at the top of the support plate 8.
[0025] Please see Figure 1-5 A stacker crane with an overload protection structure also includes a detection component. The detection component includes two sets of inner fixing blocks 10, which are respectively fixedly connected to the two sides of the top of the support plate 8. An outer extension sleeve 12 is sleeved on the outside of the inner fixing block 10. A pre-cut groove 11 is opened inside the inner fixing block 10. A first electric cylinder 13 is installed inside the pre-cut groove 11. Three sets of sensor outer shells 14 are fixedly connected to the top of the outer extension sleeve 12. A weighing sensor 16 is installed inside the sensor outer shell 14. A pad 15 is fixedly connected to the top of the weighing sensor 16. An audible and visual alarm 9 is fixedly connected to the middle position of the bottom end of the support plate 8.
[0026] The shape and size of the outer extension sleeve 12 are adapted to the shape and size of the inner fixing block 10. The outer extension sleeve 12 can slide back and forth along the outer side of the inner fixing block 10. The output end of the pre-grooved 11 is fixedly connected to the outer extension sleeve 12. The inner fixing block 10 is symmetrically distributed about the vertical center line of the support plate 8. There is a gap between the sensor outer shell 14 and the pad 15. The winch 3, the audible and visual alarm 9, the weighing sensor 16, and the controller 25 are electrically connected to avoid overload damage to the equipment.
[0027] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the first electric cylinder 13 extends, extending the outer extension sleeve 12 outward along the inner fixing block 10. The outer extension sleeve 12 is inserted into the bottom of the wooden pallet. The winch 3 raises the position of the support plate 8 by winding the steel cable 4, and the goods are lifted slightly. At this time, the first electric cylinder 13 retracts, and the outer extension sleeve 12 brings the goods onto the support plate 8. The weight of the goods presses on the pad 15. The weighing sensor 16 inside the sensor outer shell 14 detects the weight of the goods in real time. When the weight exceeds the limit, the audible and visual alarm 9 sounds an alarm. At the same time, the winch 3 slowly lowers the support plate 8, and the outer extension sleeve 12 retracts to prevent the equipment from being overloaded and damaged. The winch 3, the audible and visual alarm 9, the weighing sensor 16, and the controller 25 are electrically connected. This technology is existing technology and will not be described in detail.
[0028] An upper fixing frame 17 is provided above the support plate 8. A second electric cylinder 18 is installed at the middle position of the top of the upper fixing frame 17. The output end of the second electric cylinder 18 is fixedly connected to the pressure plate 19. The two sides of the upper fixing frame 17 are fixedly connected to the sliding sleeve 7 respectively. The vertical center lines of the support plate 8 and the pressure plate 19 coincide. The second electric cylinder 18 and the controller 25 are electrically connected to facilitate pressing and fixing the goods.
[0029] Specifically, such as Figure 1 and Figure 3 As shown, the second electric cylinder 18 on the upper fixed frame 17 pushes the pressure plate 19 down, and the pressure plate 19 presses on the top of the goods to prevent them from falling during the transfer process. The second electric cylinder 18 and the controller 25 are electrically connected. This technology is existing technology, so it will not be described in detail.
[0030] Multiple sets of third electric cylinders 20 are installed inside the vertical guide column 2. A push plate 21 is fixedly connected between the output ends of two sets of third electric cylinders 20. Two sets of rubber blocks 22 are fixedly connected to the outer side of the push plate 21. Multiple sets of block through slots 23 are opened on the side of the vertical guide column 2 near the sliding sleeve 7. An acceleration sensor 24 is installed at the middle position of the top of the support plate 8. The positions and dimensions of the rubber blocks 22 and the block through slots 23 correspond one-to-one. The third electric cylinders 20, acceleration sensors 24 and controllers 25 are electrically connected to prevent sudden falls.
[0031] Specifically, such as Figure 1 and Figure 5 As shown, when the acceleration sensor 24 senses that the support plate 8 has fallen sharply, multiple sets of third electric cylinders 20 extend synchronously, and the rubber block 22 on the push plate 21 extends outward along the block through groove 23 to block the sliding sleeve 7 and prevent it from falling further. The third electric cylinder 20, acceleration sensor 24 and controller 25 are electrically connected. This technology is existing technology and will not be described in detail.
[0032] Working principle: When this utility model is in use, firstly, the bottom sliding seat 1 and the top sliding seat 5, in cooperation with their respective corresponding tracks, drive the equipment to move to the corresponding area. The winch 3 adjusts the height of the support plate 8 by winding and unwinding the steel cable 4. After reaching the appropriate position, the first electric cylinder 13 extends, extending the outer extension sleeve 12 outward along the inner fixing block 10. The outer extension sleeve 12 is inserted into the bottom of the wooden pallet. The winch 3 raises the position of the support plate 8 by winding the steel cable 4, and the goods are lifted slightly. At this time, the first electric cylinder 13 retracts, and the outer extension sleeve 12 brings the goods onto the support plate 8. The weight of the goods presses on the pad 15. The weighing sensor 16 inside the sensor outer shell 14 detects the weight of the goods in real time. When the weight exceeds the standard, the audible and visual alarm 9 sounds an alarm. At the same time, the winch 3 slowly lowers the support plate 8, and the outer extension sleeve 12 retracts to prevent the equipment from being overloaded and damaged. As the goods are moved onto the support plate 8, before the equipment begins to transfer, the second electric cylinder 18 on the upper fixed frame 17 pushes the pressure plate 19 down, pressing the top of the goods to prevent them from falling during the transfer. If the winch 3 or the steel cable 4 malfunctions and the support plate 8 drops suddenly, the acceleration sensor 24 senses the sudden drop, and multiple sets of third electric cylinders 20 extend synchronously. The rubber stop 22 on the push plate 21 then extends outward along the stop groove 23 to block the sliding sleeve 7 and prevent it from continuing to fall.
[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A stacking crane with an overload protection structure, comprising a bottom sliding seat (1), characterized in that: A top sliding seat (5) is provided above the bottom sliding seat (1). Two sets of vertical guide columns (2) are vertically fixed between the bottom sliding seat (1) and the top sliding seat (5). Winches (3) are installed on both sides of the top of the bottom sliding seat (1). Multiple sets of pulleys (6) are provided at the bottom of the top sliding seat (5). Sleeves (7) are sleeved on the outside of the vertical guide columns (2). A steel cable (4) is provided between the winch (3) and the sleeve (7). A support plate (8) is horizontally fixed between the two sets of sleeves (7). A controller (25) is fixedly connected to the front end of the bottom sliding seat (1). A detection component that can prevent equipment overload is provided at the top of the support plate (8). The detection assembly includes two sets of inner fixing blocks (10), which are fixedly connected to the two sides of the top of the support plate (8). An outer extension sleeve (12) is sleeved on the outside of the inner fixing block (10). A pre-grooved slot (11) is opened inside the inner fixing block (10). A first electric cylinder (13) is installed inside the pre-grooved slot (11). Three sets of sensor outer shells (14) are fixedly connected to the top of the outer extension sleeve (12). A weighing sensor (16) is installed inside the sensor outer shell (14). A pad (15) is fixedly connected to the top of the weighing sensor (16). An audible and visual alarm (9) is fixedly connected to the middle position of the bottom of the support plate (8).
2. A stacking crane with an overload protection structure according to claim 1, characterized in that: The shape and size inside the outer extension sleeve (12) are adapted to the shape and size outside the inner fixing block (10), and the outer extension sleeve (12) can slide back and forth along the outside of the inner fixing block (10).
3. A stacking crane with an overload protection structure according to claim 1, characterized in that: The output end of the pre-grooved (11) is fixedly connected to the outer extension sleeve (12), and the inner fixing block (10) is symmetrically distributed about the vertical center line of the support plate (8).
4. A stacking crane with an overload protection structure according to claim 1, characterized in that: There is a gap between the outer casing (14) and the pad (15) of the sensor, and the winch (3), the audible and visual alarm (9), the weighing sensor (16), and the controller (25) are electrically connected.
5. A stacking crane with an overload protection structure according to claim 1, characterized in that: An upper fixing frame (17) is provided above the support plate (8). A second electric cylinder (18) is installed at the middle position of the top of the upper fixing frame (17). A pressure plate (19) is fixedly connected to the output end of the second electric cylinder (18). The two sides of the upper fixing frame (17) are fixedly connected to the sliding sleeve (7). The vertical center lines of the support plate (8) and the pressure plate (19) coincide. The second electric cylinder (18) and the controller (25) are electrically connected.
6. A stacking crane with an overload protection structure according to claim 1, characterized in that: Multiple sets of third electric cylinders (20) are installed inside the vertical guide column (2). A push plate (21) is fixedly connected between the output ends of two sets of third electric cylinders (20). Two sets of rubber blocks (22) are fixedly connected to the outer side of the push plate (21). Multiple sets of block through slots (23) are opened on the side of the vertical guide column (2) near the sliding sleeve (7). An acceleration sensor (24) is installed at the middle position of the top of the support plate (8). The positions and dimensions of the rubber blocks (22) and the block through slots (23) correspond one-to-one. The third electric cylinder (20), the acceleration sensor (24), and the controller (25) are electrically connected.