A small mobile jib crane
By introducing components such as torque sensors and extension plates into small mobile cantilever cranes, the center of gravity is automatically adjusted, solving the stability problem of cantilever cranes when lifting heavy objects and improving safety and flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 领碳时代(厦门)科技有限公司
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-26
AI Technical Summary
When lifting heavy objects, the center of gravity of existing small mobile cantilever cranes is prone to shift, which may lead to swaying, tipping or overturning, affecting the safety of use.
A torque sensor is used to detect the torque of the lifted item. The center of gravity is adjusted by moving and unfolding the extension plate. The extension plate and the support plate are used to support the item. The position and height of the hook are adjusted by the motor and electric telescopic rod to achieve automatic stabilization.
It effectively prevents the cantilever crane from tipping or overturning when lifting heavy objects, improves safety and stability, adapts to the conveying needs of different areas, and improves conveying efficiency.
Smart Images
Figure CN224411252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical engineering, and in particular to a small mobile cantilever crane. Background Technology
[0002] Small mobile cantilever cranes are widely used in many fields such as industrial production, logistics and transportation, and construction and decoration. As a flexible and efficient lifting equipment, they are able to complete the lifting and transportation of goods in relatively compact working environments, greatly improving work efficiency and reducing labor costs.
[0003] A simple small cantilever crane, disclosed in CN214141338U, includes an electric hoist and a crossbeam. The lower surface of the crossbeam is provided with a shell, and a long slot is formed on the lower surface penetrating the shell. This device facilitates load-bearing through the crossbeam, making it easy for the electric hoist to lift or transfer small heavy objects. The base plate facilitates the placement or movement of the device. However, this device does not have the function of preventing tipping due to instability. When lifting heavy objects, if the size of the object exceeds the original load-bearing range and center of gravity balance area of the cantilever crane, the center of gravity of the entire device will shift significantly, causing the cantilever crane to sway easily, increasing the risk of tipping or overturning. This can not only damage the lifted objects but also easily lead to accidents, affecting the safety of use.
[0004] Therefore, it is necessary to design a small, mobile cantilever crane that can automatically extend its extension plate to adjust the center of gravity of the device when the suspended object is large, while supporting the object, preventing it from tipping over or overturning, enhancing stability, reducing the occurrence of accidents, and ensuring safe use. Utility Model Content
[0005] To overcome the shortcomings of current devices that lack the function of preventing tipping due to instability, when lifting heavy items, the center of gravity of the entire device will shift significantly because the size of the item exceeds the original load-bearing range and center of gravity balance area of the cantilever crane. This causes the cantilever crane to sway easily, increasing the risk of tipping or overturning. This not only leads to damage to the lifted items but also easily causes accidents, affecting the safety of use. This utility model provides a small mobile cantilever crane that can automatically deploy an extension plate to adjust the center of gravity of the device when it detects that the lifted item is large, while supporting the item to prevent tipping or overturning, enhancing stability, reducing the occurrence of accidents, and ensuring safe use.
[0006] The technical solution is as follows: A small mobile cantilever crane includes a base, a rotating block, a receiving plate, a lifting cylinder, a telescopic cylinder, a suspension component, an adjustment component, and a drive component. The rotating block is rotatably connected to the left side of the base, and the receiving plate is slidably connected to the right side of the base. The lifting cylinder is slidably connected to the upper side of the rotating block, and the telescopic cylinder is connected to the upper part of the lifting cylinder. The telescopic cylinder is equipped with a suspension component for lifting items. The base is equipped with an adjustment component for preventing tipping. A drive component is provided between the base, the rotating block, and the telescopic cylinder.
[0007] As a preferred technical solution of this utility model, it also includes a support rod, with the support rod connected to the upper right side of the lifting cylinder, and the fixed end of the telescopic cylinder connected to the support rod.
[0008] As a preferred technical solution of this utility model, the suspension assembly includes a limit block, a winding wheel, a connecting line, a first motor, and a hook. The limit block is connected to the telescopic end of the telescopic cylinder. The winding wheel is rotatably connected to the middle of the limit block. The connecting line is wound around both the front and rear parts of the winding wheel. The first motor is connected to the front side of the limit block. The first motor and the processor are electrically connected through a control module. The output shaft of the first motor is connected to the winding wheel. The hook is connected between the connecting lines.
[0009] As a preferred technical solution of this utility model, the adjustment component includes an extension plate, a slider, a first electric telescopic rod, and a torque sensor. The extension plate is slidably connected to the base and is connected to the receiving plate. Sliders are connected to both the front and rear sides of the extension plate and are slidably connected to the base. The first electric telescopic rod is connected to the inner side of the middle of the base. The first electric telescopic rod and the processor are electrically connected through a control module. The telescopic end of the first electric telescopic rod is connected to the extension plate. A torque sensor is connected to the front of the limit block and is connected to the output shaft of the first motor.
[0010] As a preferred technical solution of this utility model, wheels are rotatably provided on the lower left and right sides of the base and the lower right side of the extension plate.
[0011] As a preferred technical solution of this utility model, the drive assembly includes a second motor, a second electric telescopic rod, and a third electric telescopic rod. The second motor is connected to the inner left side of the base. The second motor and the processor are electrically connected through a control module. The output shaft of the second motor is connected to the rotating block. The second electric telescopic rod is connected to the bottom of the rotating block. The second electric telescopic rod and the processor are electrically connected through a control module. The telescopic end of the second electric telescopic rod is connected to the lifting cylinder. The third electric telescopic rod is connected to the lifting cylinder. The third electric telescopic rod and the processor are electrically connected through a control module. The telescopic end of the third electric telescopic rod is connected to the telescopic end of the telescopic cylinder.
[0012] The beneficial effects of this utility model are as follows: 1. This utility model detects torque through a torque sensor. When the suspended item is heavy, the extension plate is moved and unfolded to adjust the center of gravity, which drives the supporting plate to move to the underside of the suspended item for support. Thus, when the suspended item is large, the extension plate is automatically unfolded to adjust the center of gravity of the device and support the item at the same time, preventing it from tipping over or overturning, enhancing stability, reducing the occurrence of accidents, and ensuring safe use.
[0013] 2. This utility model uses a second motor, a second electric telescopic rod, and a third electric telescopic rod to adjust the position and height of the limiting block. Then, the hook moves to lift and transport the item, or the rotating block rotates to transfer the item to another area. This allows for adjustment of the hook's height and position for lifting and transporting items, making it easy to adapt to the transport needs of different areas, improving transport efficiency, and providing flexible and convenient use. Attached Figure Description
[0014] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.
[0015] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of this utility model.
[0016] Figure 3 This is a three-dimensional cross-sectional view of the components of the first electric telescopic rod of this utility model.
[0017] Figure 4 This is a three-dimensional cross-sectional view of the components such as the second electric telescopic rod of this utility model.
[0018] Figure 5 This is a three-dimensional cross-sectional view of the components such as the third electric telescopic rod of this utility model.
[0019] The components in the attached diagram are labeled as follows: 1: base, 2: rotating block, 21: receiving plate, 3: lifting cylinder, 4: support rod, 5: telescopic cylinder, 6: limiting block, 61: winding wheel, 62: connecting line, 7: first motor, 8: hook, 9: extension plate, 10: slider, 11: first electric telescopic rod, 12: second motor, 13: second electric telescopic rod, 14: third electric telescopic rod, 15: torque sensor. Detailed Implementation
[0020] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0021] A small mobile cantilever crane, such as Figures 1-5 As shown, the device includes a base 1, a rotating block 2, a receiving plate 21, a lifting cylinder 3, a support rod 4, a telescopic cylinder 5, a suspension assembly, an adjustment assembly, and a drive assembly. The rotating block 2 is rotatably connected to the left side of the base 1, and the receiving plate 21 is slidably connected to the right side of the base 1. The lifting cylinder 3 is slidably connected to the upper side of the rotating block 2. The support rod 4 is connected to the upper right side of the lifting cylinder 3. The fixed end of the telescopic cylinder 5 is connected to the support rod 4 for support. The telescopic cylinder 5 is connected to the upper part of the lifting cylinder 3. The telescopic cylinder 5 is equipped with a suspension assembly for lifting items. The base 1 is equipped with an adjustment assembly for preventing tipping. A drive assembly is provided between the base 1, the rotating block 2, and the telescopic cylinder 5.
[0022] like Figure 1 and Figure 2 As shown, the suspension assembly includes a limit block 6, a winding wheel 61, a connecting line 62, a first motor 7, and a hook 8. The limit block 6 is connected to the telescopic end of the telescopic cylinder 5. The winding wheel 61 is rotatably connected to the middle of the limit block 6. The connecting line 62 is wound around both the front and rear parts of the winding wheel 61. The first motor 7 is connected to the front side of the limit block 6. The first motor 7 and the processor are electrically connected through a control module. The output shaft of the first motor 7 is connected to the winding wheel 61. The hook 8 is connected between the connecting lines 62.
[0023] like Figure 2 , Figure 3 and Figure 5 As shown, the adjustment assembly includes an extension plate 9, a slider 10, a first electric telescopic rod 11, and a torque sensor 15. The extension plate 9 is slidably connected to the base 1 and is connected to the receiving plate 21. Wheels are rotatably provided on the lower left and right sides of the base 1 and the lower right side of the extension plate 9 for easy movement. Slider 10s are connected to the front and rear sides of the extension plate 9 and are slidably connected to the base 1. The first electric telescopic rod 11 is connected to the inner side of the middle of the base 1. The first electric telescopic rod 11 and the processor are electrically connected through a control module. The telescopic end of the first electric telescopic rod 11 is connected to the extension plate 9. The torque sensor 15 is connected to the front of the limit block 6 and is connected to the output shaft of the first motor 7.
[0024] like Figure 3 , Figure 4 and Figure 5As shown, the drive assembly includes a second motor 12, a second electric telescopic rod 13, and a third electric telescopic rod 14. The second motor 12 is connected to the inner left side of the base 1. The second motor 12 and the processor are electrically connected through a control module. The output shaft of the second motor 12 is connected to the rotating block 2. The second electric telescopic rod 13 is connected to the bottom of the rotating block 2. The second electric telescopic rod 13 and the processor are electrically connected through a control module. The telescopic end of the second electric telescopic rod 13 is connected to the lifting cylinder 3. The third electric telescopic rod 14 is connected to the lifting cylinder 3. The third electric telescopic rod 14 and the processor are electrically connected through a control module. The telescopic end of the third electric telescopic rod 14 is connected to the telescopic end of the telescopic cylinder 5.
[0025] This device can be used when items need to be lifted and transported. The wheels contact the ground, and the processor starts the second motor 12 via the control module. The second motor 12 drives the rotating block 2 to rotate, which in turn drives the lifting cylinder 3, support rod 4, telescopic cylinder 5, and limit block 6 to rotate. After rotating to the appropriate position, the second electric telescopic rod 13 is activated, which moves the lifting cylinder 3, causing the telescopic cylinder 5 and limit block 6 to move. After moving to the appropriate height, the third electric telescopic rod 14 is activated, extending the telescopic cylinder 5 and adjusting the position of the limit block 6. Then, the first motor 7 is activated, driving the winding wheel 61 to rotate and feed the connecting wire 62. The first motor 7 operates in reverse, causing the winding wheel 61 to rotate in the opposite direction to reel in the connecting wire 62, thereby moving the hook 8 in the opposite direction to reset it and lifting the item. After being lifted, the device is moved to transport the item, or the second motor 12 operates to drive the rotating block 2 to rotate and transfer the item to another area, causing the wheels to rotate and be supported by the support rod 4. This allows for adjustment of the height and position of the hook 8 for lifting and transporting items, making it easy to adapt to the transportation needs of different areas, improving transportation efficiency, and providing flexible and convenient use. After transporting the item to the appropriate position, the hook 8 is moved to lower the item, and then the hook 8 is retracted.
[0026] During the lifting process, the torque of the first motor 7 is detected by the torque sensor 15. When the torque is large, it indicates that the lifted item is heavy. At this time, the first electric telescopic rod 11 is activated, which drives the extension plate 9 to move and unfold to adjust the center of gravity, causing the slider 10 to move and drive the support plate 21 to move to the underside of the lifted item. Then, the hook 8 moves to place the item on the support plate 21 for support. This allows the device to automatically unfold the extension plate 9 to adjust the center of gravity of the device while supporting the item when the lifted item is large, preventing it from tipping over or overturning, enhancing stability, reducing the occurrence of accidents, and ensuring safe use. After use, the first electric telescopic rod 11 reverses its operation, causing the extension plate 9 to move and retract, driving the slider 10 and the support plate 21 to move and reset. Then, the third electric telescopic rod 14 reverses its operation, causing the telescopic cylinder 5 to retract and return to its original position. Finally, the device can be pushed away.
[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A small mobile jib crane characterized by: It includes a base (1), a rotating block (2), a receiving plate (21), a lifting cylinder (3), a telescopic cylinder (5), a suspension assembly, an adjustment assembly, and a drive assembly. The left side of the base (1) is rotatably connected to the rotating block (2), the right side of the base (1) is slidably connected to the receiving plate (21), the upper side of the rotating block (2) is slidably connected to the lifting cylinder (3), the upper part of the lifting cylinder (3) is connected to the telescopic cylinder (5), the telescopic cylinder (5) is provided with a suspension assembly for lifting items, the base (1) is provided with an adjustment assembly for preventing tipping, and a drive assembly is provided between the base (1), the rotating block (2), and the telescopic cylinder (5).
2. A small mobile cantilever crane according to claim 1, characterized in that: It also includes a support rod (4), the upper right side of the lifting cylinder (3) is connected to the support rod (4), and the fixed end of the telescopic cylinder (5) is connected to the support rod (4).
3. A small mobile cantilever crane according to claim 1, characterized in that: The suspension assembly includes a limit block (6), a winding wheel (61), a connecting line (62), a first motor (7), and a hook (8). The limit block (6) is connected to the telescopic end of the telescopic cylinder (5). The winding wheel (61) is rotatably connected to the middle of the limit block (6). The connecting line (62) is wound around both the front and rear parts of the winding wheel (61). The first motor (7) is connected to the front side of the limit block (6). The first motor (7) and the processor are electrically connected through a control module. The output shaft of the first motor (7) is connected to the winding wheel (61). The hook (8) is connected between the connecting lines (62).
4. A small mobile cantilever crane according to claim 1, characterized in that: The adjustment assembly includes an extension plate (9), a slider (10), a first electric telescopic rod (11), and a torque sensor (15). The extension plate (9) is slidably connected to the base (1). The extension plate (9) is connected to the receiving plate (21). The front and rear sides of the extension plate (9) are connected to sliders (10). The sliders (10) are slidably connected to the base (1). The first electric telescopic rod (11) is connected to the inner side of the middle of the base (1). The first electric telescopic rod (11) and the processor are electrically connected through the control module. The telescopic end of the first electric telescopic rod (11) is connected to the extension plate (9). The front of the limit block (6) is connected to the torque sensor (15). The torque sensor (15) is connected to the output shaft of the first motor (7).
5. A small mobile cantilever crane according to claim 1, characterized in that: The lower sides of the left and right sides of the base (1) and the lower right side of the extension plate (9) are equipped with rotatable wheels.
6. A small mobile cantilever crane according to claim 1, characterized in that: The drive assembly includes a second motor (12), a second electric telescopic rod (13), and a third electric telescopic rod (14). The second motor (12) is connected to the inner left side of the base (1). The second motor (12) and the processor are electrically connected through a control module. The output shaft of the second motor (12) is connected to the rotating block (2). The second electric telescopic rod (13) is connected to the bottom of the rotating block (2). The second electric telescopic rod (13) and the processor are electrically connected through a control module. The telescopic end of the second electric telescopic rod (13) is connected to the lifting cylinder (3). The third electric telescopic rod (14) is connected to the lifting cylinder (3). The third electric telescopic rod (14) and the processor are electrically connected through a control module. The telescopic end of the third electric telescopic rod (14) is connected to the telescopic end of the telescopic cylinder (5).