A small working crane with a safety alarm device
By integrating gyroscope sensors and roll support mechanisms on small cranes, real-time monitoring and prevention of tilts, combined with gravity sensors and clamping mechanisms, the problem of small cranes capsize during lifting operations is solved, improving operational safety and stability.
Patent Information
- Application Number
- CN202411337397.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-09-25
AI Technical Summary
Existing small cranes are prone to overturn during lifting operations, which leads to threatening operator safety and cargo integrity.
A small operation crane with safety alarm device was designed, using a gyroscope sensor and roll support mechanism to monitor the crane tilt angle in real time, and back-supported through the support wheel, combined with a buzzer light to remind the operator to reduce the risk of overturning; At the same time, the mass of the lifted object is measured by a gravity sensor, and the weight is stably clamped by a clamping mechanism.
It effectively reduces the occurrence of crane tilt and overturning, improves operational safety and lifting stability, and ensures the safety of cargo transportation.
Smart Images
Figure CN118850983B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a small crane, in particular to a small operating crane with a safety alarm device applied in the field of lifting equipment. Background Art
[0002] Small cranes have a compact design that integrates a flexible and mobile body with an efficient lifting device. The body is usually made of a sturdy steel structure with four steering wheels, which makes it easy to move around narrow or uneven construction sites. The lifting device is installed on the upper part of the body and includes a retractable boom that is driven by a hydraulic or electric system to achieve lifting and rotation. The end is connected to a wire rope and a hook for grabbing and lifting heavy objects.
[0003] Existing small cranes are flexible and efficient during the lifting process, but when lifting heavy objects and moving them, one needs to be alert to the risk of center of gravity shift. The suspension of heavy objects causes the overall center of gravity of the crane to move upward and shift laterally. If it exceeds the designed balance range, it can easily cause the crane to tilt or even overturn, seriously threatening the safety of the operator and the integrity of the cargo. Summary of the invention
[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing small crane is prone to overturning during the lifting operation.
[0005] To solve the above problems, the present invention provides a small-sized working crane with a safety alarm device, comprising a moving seat, the moving seat is fixedly connected to a supporting cylinder, a rotating seat is rotatably connected above the supporting cylinder, a supporting arm is fixedly connected above the rotating seat, a telescopic arm is fixedly connected to the upper end of the supporting arm, a hook is arranged below the telescopic arm, and the hook is connected to a winding mechanism on the telescopic arm through a wire rope; a roll support mechanism is installed on the supporting cylinder, the roll support mechanism comprises a gyroscope sensor installed in the supporting cylinder and a supporting wheel assembly, the supporting wheel assembly comprises a plurality of supporting wheels arranged on the outer side of the moving seat, the supporting wheel is connected to a swing arm, a rotating gear ring rotatably sleeved on the outer side of the supporting cylinder is fixedly connected to the inner side of the swing arm, a first driving gear is meshed on one side of the rotating gear ring, and the first driving gear is connected to a first motor installed in the supporting cylinder; both the first motor and the gyroscope sensor are electrically connected to a controller, the controller is fixedly connected to a handrail rod fixedly connected to the rotating seat, and a buzzer light electrically connected to the controller is installed on the handrail rod.
[0006] In the above-mentioned small operating crane with a safety alarm device, the tilted side of the small crane is reversely supported by a gyro sensor and a support wheel assembly, thereby reducing the occurrence of overturning of the small crane due to a change in the center of gravity.
[0007] As a further improvement of the present application, a clamping mechanism is installed on the side of the rotating seat away from the support arm, and the clamping mechanism includes a pair of relatively arranged clamping plates, the clamping plates are connected to a slide frame fixedly connected to the rotating seat, and a bidirectional screw module threadedly connected to the clamping plate is installed in the slide frame. A fixed disk is installed on each clamping plate, and multiple groups of clamping rods distributed in concentric circles are installed on the fixed disk. The clamping rod is connected to an airbag through a universal joint on the side facing the heavy object.
[0008] As a further improvement of the present application, the bottom of the moving seat is provided with moving wheels distributed in four corners, and a pair of moving wheels and supporting wheels located on one side of the handrail rod are universal wheels.
[0009] As a further improvement of the present application, the telescopic arm is a hydraulic telescopic arm, the winding mechanism is a winding drum with a motor, a gravity sensor is installed on the hook, the gravity sensor is electrically connected to the controller, and the gravity sensor measures the mass of the suspended object.
[0010] As a further improvement of the present application, the support tube is a vertically arranged hollow cylinder, the bottom of the rotating seat is fixedly connected to a rotating ring nested in the upper end of the support tube, the interior of the support tube is fixedly connected to a fixed gear ring located below the rotating ring, the fixed gear ring is meshed with a second drive gear, and the second drive gear is connected to a second motor installed in the rotating seat.
[0011] As a further improvement of the present application, the roll support mechanism includes a plurality of support wheel assemblies, and the first motor of each support wheel assembly is equipped with a Hall sensor, which monitors the rotation angle of the first motor in real time.
[0012] As a further improvement of the present application, the clamping rod includes a mounting cylinder nested in a fixed disk, a piston rod extending to the outside of the mounting cylinder is nested in the mounting cylinder, the piston rod is abutted against a spring installed in the mounting cylinder, one end of the piston rod away from the spring is connected to a universal joint, the mounting cylinder is filled with magnetorheological fluid, and the clamping plate is located outside the fixed disk and is equipped with an electromagnetic coil.
[0013] As a further improvement of the present application, the airbag is a hollow hemispherical airbag, the electromagnetic coil is connected to an electromagnetic driver, and the electromagnetic driver is electrically connected to the controller.
[0014] In summary, the present invention is provided with a gyroscope sensor and a roll support mechanism, and the tilt angle of the crane is monitored in real time during the lifting operation. When it is detected that the crane is tilting to one side, the support wheel in the roll support mechanism moves to the tilted side under the drive of the swing arm to provide reverse support for the crane, thereby effectively reducing the further overturning of the crane after the tilt, and using a buzzer light to promptly remind the operator to improve operational safety; in addition, the weight of the hoisted object is measured by a gravity sensor installed in the hook, and a buzzer light is used to remind the operator to eliminate the lifting hazards in advance; in addition, the heavy object is clamped and stabilized by a clamping mechanism to reduce the change of the center of gravity of the crane during transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of the three-dimensional structure of this application;
[0016] Figure 2 It is a cross-sectional structural schematic diagram of this application;
[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;
[0018] Figure 4 It is a schematic diagram of the exploded assembly of the roll support mechanism in this application;
[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the present application from the front side perspective;
[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the clamping mechanism in this application;
[0021] Figure 7 It is a schematic diagram of the cross-sectional structure of the supporting mechanism in this application;
[0022] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at B in the middle;
[0023] Fig. 9 Schematic diagram of the state where the electromagnetic coil applies a magnetic field to the magnetorheological fluid in the clamping rod.
[0024] Description of the numbers in the figure:
[0025] 1. Moving seat; 2. Support tube; 3. Rotating seat; 4. Support arm; 5. Telescopic arm; 6. Hook; 7. Winding mechanism; 8. Support wheel; 9. Swing arm; 10. Rotating gear ring; 11. First drive gear; 12. First motor; 13. Gyro sensor; 14. Handrail; 15. Controller; 16. Buzzer light; 17. Fixed gear ring; 18. Second drive gear; 19. Second motor; 20. Rotating ring; 21. Clamping mechanism; 22. Clamping plate; 23. Slide rack; 24. Bidirectional screw module; 25. Fixed plate; 26. Clamping rod; 27. Mounting tube; 28. Piston rod; 29. Spring; 30. Universal joint; 31. Airbag; 32. Electromagnetic coil. DETAILED DESCRIPTION
[0026] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.
[0027] The first implementation method:
[0028] Figure 1-4 A small-sized working crane with a safety alarm device is shown, comprising a moving seat 1, the moving seat 1 is fixedly connected to a supporting cylinder 2, a rotating seat 3 is rotatably connected above the supporting cylinder 2, a supporting arm 4 is fixedly connected above the rotating seat 3, a telescopic arm 5 is fixedly connected to the upper end of the supporting arm 4, a hook 6 is provided below the telescopic arm 5, and the hook 6 is connected to a winding mechanism 7 on the telescopic arm 5 through a steel wire rope;
[0029] A roll support mechanism is installed on the support tube 2, and the roll support mechanism includes a gyro sensor 13 and a support wheel assembly installed in the support tube 2. The support wheel assembly includes a plurality of support wheels 8 arranged on the outside of the moving seat 1, and the support wheel 8 is connected to a swing arm 9. A rotating gear ring 10 rotatably sleeved on the outside of the support tube 2 is fixedly connected to the inner side of the swing arm 9. A first driving gear 11 is meshed on one side of the rotating gear ring 10, and the first driving gear 11 is connected to a first motor 12 installed in the support tube 2;
[0030] Both the first motor 12 and the gyro sensor 13 are electrically connected to the controller 15 . The controller 15 is fixedly connected to a handrail 14 which is fixedly connected to the rotating seat 3 . A buzzer light 16 which is electrically connected to the controller 15 is mounted on the handrail 14 .
[0031] For details, please refer to Figure 2-4When the hook 6 is in the process of lifting heavy objects or moving after lifting, the tilt angle of the crane is monitored in real time through the gyroscope sensor 13. When it is detected that the crane is tilting in a certain direction, the controller 15 starts the first motor 12 and the buzzer light 16. The first motor 12 drives the rotating gear ring 10 to rotate through the first driving gear 11. The rotating gear ring 10 drives the supporting wheel 8 to rotate to the tilted side of the crane through the swing arm 9, and reversely supports the crane, thereby preventing the crane from overturning due to tilting. At the same time, the buzzer light 16 buzzes and flashes to remind the operator to improve the safety of operation.
[0032] Compared with traditional small cranes, the present invention is equipped with a gyroscope sensor 13 and a roll support mechanism to monitor the tilt angle of the crane in real time during the lifting operation. When it is detected that the crane is tilting to one side, the support wheel 8 in the roll support mechanism moves to the tilted side under the drive of the swing arm 9 to provide reverse support for the crane, thereby effectively reducing the possibility of further overturning of the crane after it is tilted, and using the buzzer light 16 to promptly remind the operator, thereby improving operational safety.
[0033] See also Figure 1 The bottom of the moving seat 1 is provided with moving wheels distributed in four corners, and a pair of moving wheels and the supporting wheel 8 located on one side of the handrail rod 14 are all universal wheels.
[0034] Specifically, it is convenient to realize the movement and steering of the crane.
[0035] It should be noted that the telescopic arm 5 is a hydraulic telescopic arm, the winding mechanism 7 is a winding drum with a motor, a gravity sensor is installed on the hook 6, the gravity sensor is electrically connected to the controller 15, and the gravity sensor measures the mass of the suspended object.
[0036] Specifically, the gravity sensor installed on the hook 6 detects the hoisted object, thereby further improving the safety of the hoisting operation and avoiding the situation where the crane overturns due to the weight exceeding the hoisting threshold.
[0037] See also Figure 3 The support tube 2 is a vertically arranged hollow cylinder. The bottom of the rotating seat 3 is fixedly connected to a rotating ring 20 nested in the upper end of the support tube 2. The interior of the support tube 2 is fixedly connected to a fixed gear ring 17 located below the rotating ring 20. The fixed gear ring 17 is meshed with a second driving gear 18, and the second driving gear 18 is connected to a second motor 19 installed in the rotating seat 3.
[0038] Specifically, the second motor 19 drives the second driving gear 18 to roll on the fixed gear ring 17, thereby driving the rotating seat 3 and the rotating ring 20 to rotate along the supporting tube 2, which is convenient for lifting and steering, improves the freedom of operation and saves manpower.
[0039] In order to improve the supporting effect, the roll support mechanism includes a plurality of support wheel assemblies. The first motor 12 of each support wheel assembly is equipped with a Hall sensor, and the Hall sensor monitors the rotation angle of the first motor 12 in real time.
[0040] Specifically, the supporting effect of the crane is improved by using multiple roll support mechanisms, and by monitoring the rotation angle of the first motor 12, it is convenient to monitor and control the rotation position of the support wheel 8 of each roll support mechanism, thereby further improving the stability and anti-overturning ability of the crane.
[0041] Second implementation method:
[0042] Figure 5-9 A small working crane with a safety alarm device is shown. Based on the first embodiment, a clamping mechanism 21 is installed on the side of the rotating seat 3 away from the support arm 4. The clamping mechanism 21 includes a pair of clamping plates 22 arranged opposite to each other. The clamping plates 22 are connected to a slide frame 23 fixedly connected to the rotating seat 3. A bidirectional screw module 24 threadedly connected to the clamping plates 22 is installed in the slide frame 23.
[0043] Specifically, after the heavy object is lifted and placed on the rotating seat 3, the bidirectional screw module 24 is started to drive the clamping plate 22 to move toward each other to clamp and fix the heavy object on the rotating seat 3, so as to facilitate the rapid fixation of the heavy object during transportation and avoid the situation where the overall center of gravity of the crane is continuously moved due to the shaking of the heavy object, which may cause the crane to overturn.
[0044] See also Figure 6 A fixing plate 25 is mounted on each clamping plate 22, and a plurality of groups of clamping rods 26 distributed in concentric circles are mounted on the fixing plate 25. The clamping rods 26 are connected to an air bag 31 through a universal joint 30 on the side facing the weight.
[0045] Specifically, when the clamping plate 22 is close to the weight, the airbag 31 contacts the surface of the weight and is squeezed and compressed, so that the airbag 31 better fits the surface of the weight, making it easier to clamp and fix irregularly shaped weights and improving the stability of the clamping of the weight.
[0046] See also Figure 7 and Figure 8 The clamping rod 26 includes a mounting tube 27 nested in the fixed disk 25, a piston rod 28 extending to the outside of the mounting tube 27 is nested in the mounting tube 27, the piston rod 28 abuts against a spring 29 installed in the mounting tube 27, and the end of the piston rod 28 away from the spring 29 is connected to the universal joint 30, the mounting tube 27 is filled with magnetorheological fluid, and the clamping plate 22 is located outside the fixed disk 25 and is installed with an electromagnetic coil 32.
[0047] Specifically, when the clamping is completed, the electromagnetic coil 32 is started, and the electromagnetic coil 32 applies a magnetic field to the magnetorheological fluid in the mounting tube 27, so that the magnetorheological fluid solidifies, and then the clamping rod 26 is locked to improve the stability of the clamping.
[0048] In this embodiment, the airbag 31 is a hollow hemispherical airbag, the electromagnetic coil 32 is connected to an electromagnetic driver, and the electromagnetic driver is electrically connected to the controller 15 .
[0049] Specifically, it is convenient to achieve stable clamping and fixing of heavy objects.
[0050] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.
Claims
1. A small working crane with a safety alarm device, characterized in that: The mobile seat (1) is fixedly connected to a support cylinder (2), a rotating seat (3) is rotatably connected to the upper part of the support cylinder (2), a support arm (4) is fixedly connected to the upper part of the rotating seat (3), a telescopic arm (5) is fixedly connected to the upper end of the support arm (4), a lifting hook (6) is provided below the telescopic arm (5), and the lifting hook (6) is connected to a winding mechanism (7) on the telescopic arm (5) via a steel wire rope; The support tube (2) is provided with a roll support mechanism, the roll support mechanism comprising a gyro sensor (13) installed in the support tube (2) and a support wheel assembly, the support wheel assembly comprising a plurality of support wheels (8) arranged outside the moving seat (1), the support wheels (8) being connected to a swing arm (9), the inner side of the swing arm (9) being fixedly connected to a rotating gear ring (10) rotatably sleeved on the outer side of the support tube (2), one side of the rotating gear ring (10) being meshed with a first drive gear (11), the first drive gear (11) being connected to a first motor (12) installed in the support tube (2); Both the first motor (12) and the gyro sensor (13) are electrically connected to a controller (15); the controller (15) is fixedly connected to a handrail (14) fixedly connected to the rotating seat (3); and a buzzer light (16) electrically connected to the controller (15) is mounted on the handrail (14).
2. A small working crane with a safety alarm device according to claim 1, characterized in that: A clamping mechanism (21) is installed on the side of the rotating seat (3) away from the support arm (4), and the clamping mechanism (21) includes a pair of clamping plates (22) arranged opposite to each other, the clamping plates (22) are connected to a slide frame (23) fixedly connected to the rotating seat (3), and a bidirectional screw rod module (24) threadedly connected to the clamping plate (22) is installed in the slide frame (23), and each of the clamping plates (22) is installed with a fixed disk (25), and a plurality of groups of clamping rods (26) distributed in concentric circles are installed on the fixed disk (25), and the clamping rods (26) are connected to an air bag (31) on the side facing the heavy object through a universal joint (30).
3. A small working crane with a safety alarm device according to claim 1, characterized in that: The bottom of the movable seat (1) is provided with movable wheels distributed at four corners, and a pair of movable wheels and a support wheel (8) located on one side of the handrail rod (14) are all universal wheels.
4. A small working crane with a safety alarm device according to claim 1, characterized in that: The telescopic arm (5) is a hydraulic telescopic arm, the winding mechanism (7) is a winding drum with a motor, and a gravity sensor is installed on the hook (6). The gravity sensor is electrically connected to the controller (15), and the gravity sensor measures the mass of the suspended object.
5. A small working crane with a safety alarm device according to claim 1, characterized in that: The support tube (2) is a hollow cylinder arranged vertically; a rotating ring (20) is fixedly connected to the bottom of the rotating seat (3) and is nested in the upper end of the support tube (2); a fixed gear ring (17) located below the rotating ring (20) is fixedly connected to the inside of the support tube (2); a second driving gear (18) is meshed with the fixed gear ring (17); and the second driving gear (18) is connected to a second motor (19) installed in the rotating seat (3).
6. A small working crane with a safety alarm device according to claim 1, characterized in that: The roll support mechanism comprises a plurality of support wheel assemblies, and the first motor (12) of each support wheel assembly is equipped with a Hall sensor, which monitors the rotation angle of the first motor (12) in real time.
7. A small working crane with a safety alarm device according to claim 2, characterized in that: The clamping rod (26) comprises a mounting tube (27) nested in the fixed disk (25), a piston rod (28) is nested in the mounting tube (27) and extends to the outside of the mounting tube (27), the piston rod (28) abuts against a spring (29) installed in the mounting tube (27), one end of the piston rod (28) away from the spring (29) is connected to a universal joint (30), the mounting tube (27) is filled with magnetorheological fluid, and the clamping plate (22) is located outside the fixed disk (25) and is installed with an electromagnetic coil (32).
8. A small working crane with a safety alarm device according to claim 7, characterized in that: The airbag (31) is a hollow hemispherical airbag, the electromagnetic coil (32) is connected to an electromagnetic driver, and the electromagnetic driver is electrically connected to the controller (15).