Crane with buffer protection swing arm
By designing a buffered protective swing arm on a tower crane and using a backup power source to drive the moving base and buffer foam structure, the problem of the swing arm rotating and colliding with the building during a power outage is solved, achieving safe protection and normal use during power outages.
Patent Information
- Application Number
- CN202520310307.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In the event of a power outage, the boom of a tower crane is prone to rotation due to wind and collision with the building, which could lead to damage or collapse. Existing technology lacks effective protective measures.
Design a crane with a buffered protective swing arm. The motor is started by a backup power source to drive the moving seat to move to the right side of the swing arm. Combined with a buffer foam and compression spring structure, the swing arm is prevented from rotating and collision damage is reduced.
In the event of a power outage, it effectively prevents the swing arm from rotating and colliding with the building, reduces the risk of swing arm damage and tower crane tilting, and ensures that normal use is not affected.
Smart Images
Figure CN223765959U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tower crane protection technology, and in particular to a crane with a buffer protective swing arm. Background Technology
[0002] Tower cranes, also known as tower cranes or tower hoists, are large, fully rotating jib cranes mainly used on construction sites and other civil engineering sites. Their design allows for efficient handling of building materials and machinery, enabling the vertical transport of heavy objects to various locations within high-rise buildings.
[0003] Tower cranes typically consist of a tower, a slewing mechanism, a jib, and an operator's cab. The tower, serving as the crane's supporting structure, is usually quite tall, allowing the jib to reach the upper floors of a building. The slewing mechanism enables the jib to rotate 360 degrees, facilitating the lifting of items from different directions. The jib is divided into a long horizontal jib and a shorter jib. The main jib is used to carry and transport heavy objects, while the jib plays a balancing role and is usually equipped with a concrete counterweight. The operator's cab is located at one end of the tower, where the operator controls all the crane's movements.
[0004] However, tower cranes are typically installed on construction sites, where power outages are common. During power outages, the suddenness of the outage can prevent operators from closing the locking device of the slewing mechanism in time. This can cause the boom at a high position to be easily blown by the wind and rotate around the top of the tower crane. If the boom cannot be retracted in time, it can easily collide with nearby buildings due to rotation, causing damage to both. While the probability of a building collapsing from the impact of the boom is low, the boom is very likely to bend or even fall due to the impact. If the boom falls, the center of gravity of the tower crane may shift, causing the entire tower crane to collapse. Therefore, a tower crane with a protective structure is provided to overcome the above-mentioned defects. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a crane with a buffer and protective swing arm.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a crane with a buffer and protective swing arm, comprising a tower crane body, a swing arm disposed on the top right side of the tower crane body, a backup power supply disposed on the upper left side of the tower crane body, a first vertical plate fixedly connected to the lower left top of the swing arm, a second vertical plate fixedly connected to the lower right top of the swing arm, a motor fixedly connected to the left end face of the first vertical plate, a threaded rod fixedly connected to the output end of the motor, a moving block spirally connected to the outer side of the threaded rod, a moving seat fixedly connected to the top of the moving block, sleeves fixedly connected to the front and rear sides of the moving seat, a compression spring fixedly connected to the inner side of the sleeve, a top rod fixedly connected to the other end of the compression spring, a pressure-resistant plate fixedly connected to the other end of the top rod, buffer foam fixedly connected to the outer surface of the pressure-resistant plate, and a distance sensor fixedly connected to the inner outer side of the moving seat.
[0007] As a further description of the above technical solution: the left end face of the second vertical plate is rotatably connected to the end of the threaded rod away from the motor, and the outer side of the top rod is slidably connected to the inside of the sleeve. When the tower crane body is powered off, the motor can be started by the backup power supply, and the moving seat can be moved to the right top of the swing arm to protect the outer side of the right top of the swing arm.
[0008] As a further description of the above technical solution: the backup power supply is electrically connected to the motor, the distance sensor and the cab at the top of the tower crane body, and the distance sensor is electrically connected to the cab at the top of the tower crane body. It can provide short-term power to the cab at the top of the tower crane body, the distance sensor and the motor, so that the motor drives the moving block and the fixed seat to move to the right top of the swing arm. Powering the cab allows the operator to lock the slewing device of the tower crane body in time to prevent the swing arm from deflecting and rotating due to the influence of wind.
[0009] As a further description of the above technical solution: there are two motors and two threaded rods, and the motors are distributed in the middle of the front and rear sides of the left end face of the first upright plate. The motor on the front side of the first upright plate drives the threaded rod at its output end to rotate counterclockwise, and the motor on the rear side of the first upright plate drives the threaded rod at its output end to rotate clockwise. The motors can rotate in both directions and can drive the movable seat to move towards the front end of the swing arm that may come into contact with the building, so as to protect the front end of the swing arm in time and prevent the front end of the swing arm from being bent due to impact.
[0010] As a further description of the above technical solution: a through groove is provided on the inner side of the movable seat, and the width of the through groove on the inner side of the movable seat is the same as the width of the swing arm. A groove is provided in the middle of the bottom of the movable seat, and the width of the groove in the middle of the bottom of the movable seat is one-third of the width of the bottom of the movable seat. When the movable seat moves to the top right side of the swing arm, it does not affect the normal use of the lifting hook used for lifting materials below the swing arm.
[0011] As a further description of the above technical solution: the number of sleeves and top rods on the outer surface of the movable seat is several, and the sleeves and top rods are arranged in rows on the front and rear surfaces of the movable seat. The distance between the sleeves and top rods on the front and rear surfaces of the movable seat is 1.5 times the length of the pressure plate, which can effectively reduce the impact when the swing arm moves towards the building and greatly improve the impact resistance of the swing arm.
[0012] As a further description of the above technical solution: several grooves are opened on the top of the buffer foam, and the overall area of the buffer foam is the same as the surface area of the pressure-resistant plate. The thickness of the buffer foam is five centimeters, which can reduce the damage to the building surface caused by hard objects when the swing arm impacts the building, and effectively reduce the impact force on the swing arm and the building.
[0013] This utility model has the following beneficial effects:
[0014] This invention relates to a crane with a buffered protective swing arm. Through its design, the device allows the motor to be started using a backup power source when the tower crane itself is without power. This enables the moving seat to move towards the right top edge of the swing arm, protecting the outer side of the right top edge of the swing arm. This prevents the swing arm from rotating due to wind at height and potentially hitting surrounding buildings during a power outage, thus reducing damage to the swing arm from impacts. Furthermore, during normal use, the moving seat is positioned close to the top of the tower crane's cab, ensuring normal operation of the swing arm without causing the center of gravity to shift towards the swing arm. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a three-dimensional structural diagram of the movable seat of this utility model;
[0017] Figure 3 This is a three-dimensional cross-sectional structural diagram of the sleeve of this utility model;
[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the cushioning foam of this utility model.
[0019] Legend:
[0020] 1. Tower crane body; 2. Swing boom; 3. Backup power supply; 4. Moving base; 5. Sleeve; 6. Pressure plate; 7. First upright plate; 8. Second upright plate; 9. Motor; 10. Threaded rod; 11. Moving block; 12. Top rod; 13. Distance sensor; 14. Compression spring; 15. Buffer foam. Detailed Implementation
[0021] Reference Figures 1-4 This utility model provides a crane with a buffer and protective swing arm, including a tower crane body 1, a swing arm 2 installed on the top right side of the tower crane body 1, a backup power supply 3 fixed to the upper left side of the tower crane body 1 by bolts, a first vertical plate 7 welded to the lower left top of the swing arm 2, a second vertical plate 8 welded to the lower right top of the swing arm 2, a motor 9 fixed to the left end face of the first vertical plate 7 by bolts, the output shaft of the motor 9 passes through the interior of a threaded rod 10 and is welded and fixed to the interior of the threaded rod 10, the outer side of the threaded rod 10 passes through the interior of a moving block 11 and is helical with the internal thread of the moving block 11, a moving seat 4 welded to the top of the moving block 11, and the moving seat 4... Sleeves 5 are welded on both the front and rear sides. Compression springs 14 are welded to the inner side of sleeves 5. Top rods 12 are welded to the other end of compression springs 14. Pressure-resistant plates 6 are welded to the other end of top rods 12. Buffer foam 15 is fixed to the outer surface of pressure-resistant plates 6 with adhesive. Distance sensors 13 are fixedly connected to the inner and outer sides of the movable seat 4. The left end face of the second vertical plate 8 is rotatably connected to the end of the threaded rod 10 away from the motor 9. The outer side of the top rod 12 is slidably connected to the inside of sleeves 5. When the tower crane body 1 is powered off, the motor 9 can be started by the backup power supply 3, allowing the movable seat 4 to move to the right top of the swing arm 2, thus protecting the outer side of the right top of the swing arm 2.
[0022] As a further implementation of the above technical solution: the backup power supply 3 is electrically connected to the motor 9, the distance sensor 13 and the cab at the top of the tower crane body 1, and the distance sensor 13 is electrically connected to the cab at the top of the tower crane body 1. This can provide a short-term power supply to the cab at the top of the tower crane body 1, the distance sensor 13 and the motor 9, so that the motor 9 can drive the moving block 11 and the fixed seat to move to the right top of the swing arm 2. Providing power to the cab allows the operator to lock the slewing device of the tower crane body 1 in time to prevent the swing arm 2 from deflecting and rotating due to the wind.
[0023] As a further implementation of the above technical solution: there are two motors 9 and two threaded rods 10. The motors 9 are distributed in the middle of the front and rear sides of the left end face of the first upright plate 7. The motor 9 on the front side of the first upright plate 7 drives the threaded rod 10 at its output end to rotate counterclockwise, and the motor 9 on the rear side of the first upright plate 7 drives the threaded rod 10 at its output end to rotate clockwise. The motors 9 can rotate in both directions and can drive the movable seat 4 to move towards the front end of the swing arm 2, which may come into contact with the building, so as to protect the front end of the swing arm 2 in time and prevent the front end of the swing arm 2 from being bent due to impact.
[0024] As a further implementation of the above technical solution: a through groove is provided on the inner side of the movable seat 4, and the width of the through groove on the inner side of the movable seat 4 is the same as the width of the swing arm 2. A groove is provided in the middle of the bottom of the movable seat 4, and the width of the groove in the middle of the bottom of the movable seat 4 is one-third of the width of the bottom of the movable seat 4. When the movable seat 4 moves to the top right side of the swing arm 2, it does not affect the normal use of the lifting hook used for lifting materials below the swing arm 2.
[0025] As a further implementation of the above technical solution: the number of sleeves 5 and top rods 12 on the outer surface of the movable seat 4 is several, and the sleeves 5 and top rods 12 are arranged in rows on the front and rear surfaces of the movable seat 4. The distance between the sleeves 5 and top rods 12 on the front and rear surfaces of the movable seat 4 is 1.5 times the length of the pressure plate 6, which can effectively reduce the impact when the swing arm 2 moves towards the building and greatly improve the impact resistance of the swing arm 2.
[0026] As a further implementation of the above technical solution: several grooves are opened on the top of the buffer foam 15, and the overall area of the buffer foam 15 is the same as the surface area of the pressure-resistant plate 6. The thickness of the buffer foam 15 is five centimeters, which can reduce the damage to the building surface caused by hard objects when the swing arm 2 impacts the building, and effectively reduce the impact force on the swing arm 2 and the building.
[0027] Working principle:
[0028] When using this utility model, the backup power supply 3 is charged, and the electrical energy is stored in the backup power supply 3. When a power outage occurs at the construction site, the backup power supply 3 can provide a short-term power supply to the operator's cab of the tower crane body 1. During this short-term power supply, the operator can quickly shut down the slewing device of the tower crane body 1. While the backup power supply 3 is supplying power to the operator's cab, the motor 9 on the left side of the first vertical plate 7 below the swing arm 2 is started. The motor 9 drives the threaded rod 10 at the output end to rotate. The other end of the threaded rod 10 is located in the middle of the second vertical plate 8 at the lower top right side of the swing arm 2. The threaded rod 10 drives the moving block 11 on its outer side to move the moving seat 4 towards the position of the second vertical plate 8 until the moving block 11 contacts the left end face of the second vertical plate 8 and stops. At this time, the moving seat 4 moves to the swing arm 2. The right outer top is protected. If the operator in the cab does not have time to shut off the slewing device, causing the swing arm 2 to be blown by the wind and rotate above the tower crane body 1, and hit the building surface, the building surface will first come into contact with the cushioning foam 15. The cushioning foam 15 on the outside of the pressure plate 6 can reduce the damage to the building surface when the pressure plate 6 comes into contact with the building surface. At this time, the pressure plate 6 drives the top rod 12 to move into the sleeve 5. At this time, the compression spring 14 inside the sleeve 5 deforms. The impact resistance of the compression spring 14 can reduce the impact force transmitted to the swing arm 2, greatly reducing the impact on the swing arm 2. The distance sensor 13 allows the operator in the cab to know the distance between the swing arm 2 and the building, giving the operator time to react.
[0029] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are 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 crane with a buffer protection swing arm, comprising a tower crane body (1), a swing arm (2) is arranged on the right side of the top of the tower crane body (1), characterized in that: The spare power supply (3) is arranged on the left side of the tower crane body (1), the first vertical plate (7) is fixedly connected to the top of the left side of the swing arm (2), the second vertical plate (8) is fixedly connected to the top of the right side of the swing arm (2), the motor (9) is fixedly connected to the left end surface of the first vertical plate (7), the threaded rod (10) is fixedly connected to the output end of the motor (9), the moving block (11) is spirally connected to the outer side of the threaded rod (10), the moving seat (4) is fixedly connected to the top of the moving block (11), the sleeve (5) is fixedly connected to the front and rear sides of the moving seat (4), the compression spring (14) is fixedly connected to the inner side of the sleeve (5), the top rod (12) is fixedly connected to the other end of the compression spring (14), the anti-pressure plate (6) is fixedly connected to the other end of the top rod (12), the buffer foam (15) is fixedly connected to the outer side surface of the anti-pressure plate (6), and the distance sensor (13) is fixedly connected to the inner side of the moving seat (4).
2. A crane with a buffer guard swing arm according to claim 1, characterized in that: The left end surface of the second vertical plate (8) is rotationally connected to one end of the threaded rod (10) away from the motor (9), and the outer side of the top rod (12) is slidably connected to the inside of the sleeve (5).
3. A crane having a buffer guard swing arm as claimed in claim 1, characterised in that: The spare power supply (3) is electrically connected with the motor (9), the distance sensor (13) and the cockpit on the top of the tower crane body (1), and the distance sensor (13) is electrically connected with the cockpit on the top of the tower crane body (1).
4. A crane having a buffer guard swing arm as claimed in claim 1, characterised in that: The number of the motor (9) and the threaded rod (10) is two, and the motor (9) is distributed at the middle position of the front and rear sides of the left end surface of the first vertical plate (7), the motor (9) on the front side of the first vertical plate (7) drives the threaded rod (10) on the output end to rotate counterclockwise, and the motor (9) on the rear side of the first vertical plate (7) drives the threaded rod (10) on the output end to rotate clockwise, and the motor (9) can be reversed.
5. A crane having a buffer guard swing arm as claimed in claim 1, characterised in that: The through slot is formed in the inner side of the moving seat (4), the width of the through slot in the inner side of the moving seat (4) is the same as the width of the swing arm (2), and the groove is formed in the middle of the bottom of the moving seat (4), and the width of the groove in the middle of the bottom of the moving seat (4) is one third of the width of the bottom of the moving seat (4).
6. A crane having a buffer guard swing arm as claimed in claim 1, characterised in that: The number of the sleeve (5) and the top rod (12) on the outer side surface of the moving seat (4) is several, and the sleeve (5) and the top rod (12) are arranged in rows on the front and rear side surfaces of the moving seat (4), and the distance between the sleeve (5) and the top rod (12) on the front and rear side surfaces of the moving seat (4) is one point five times the length of the anti-pressure plate (6).
7. A crane having a buffer guard swing arm as claimed in claim 1, characterised in that: The buffer foam (15) is provided with a plurality of grooves on the top, the overall area of the buffer foam (15) is the same as the surface area of the anti-pressure plate (6), and the thickness of the buffer foam (15) is five centimeters.