Direct current portal crane
By designing a DC gantry crane with a rotating base and traveling wheels, the problem of existing gantry cranes being unable to move has been solved, enabling efficient transportation and flexible movement of goods, and reducing operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
The existing gantry cranes are immobile, resulting in low overall cargo handling efficiency and requiring additional vehicles for transportation, which increases operating costs.
A DC gantry crane was designed, which adopts a rotating base and traveling wheels structure. The rotating base is driven to rotate by a first drive device, and the traveling wheels are driven to rotate by a second drive device, so as to realize the crane's linear movement and turning. Combined with a servo motor to precisely control the rotation amount, it is equipped with safety devices such as laser radar and mechanical limit switches to improve flexibility and safety.
This enables the crane to move flexibly and turn precisely, improving cargo transportation efficiency, reducing the need for additional transport vehicles, and lowering operating costs.
Smart Images
Figure CN224076948U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane technology, and in particular to a DC gantry crane. Background Technology
[0002] Cranes are important facilities specifically used for lifting heavy goods or equipment. They are frequently used in factory production processes. Among them, gantry cranes are one type of crane, which mainly consists of a main beam and an electric hoist installed on the main beam.
[0003] Most existing gantry cranes use columns to support the main beam. The columns are located at both ends of the main beam and are fixed to the ground by bolts or welding. Although this type of gantry crane can meet the lifting requirements of heavy objects, it can only perform fixed-point operations and cannot realize the movement and transportation of goods. As a result, when goods are unloaded by the gantry crane in the factory, vehicles are still needed to transport the goods, resulting in low overall handling efficiency and high operating costs.
[0004] Therefore, it is necessary to propose DC gantry cranes to improve the efficiency of cargo handling. Utility Model Content
[0005] The purpose of this invention is to solve the problem that existing gantry cranes cannot move, resulting in very low overall handling efficiency of goods. A DC gantry crane is now provided.
[0006] The technical solution of this utility model is:
[0007] A DC gantry crane includes an upper crossbeam and columns located at both ends of the upper crossbeam. Each column at each end of the upper crossbeam includes two legs. The two legs located at the same end of the upper crossbeam are respectively located on both sides of the upper crossbeam. The top of the legs is fixedly connected to the upper crossbeam. The bottom of each leg is rotatably connected to a rotating seat. A traveling wheel is installed on the rotating seat. The rotating seat is driven by a first drive device to rotate relative to the legs. The traveling wheel is driven to rotate by a second drive device.
[0008] Furthermore, a support base is fixedly connected to one end of the rotating seat, and the traveling wheels are located inside the support base and rotatably connected to the support base; a transmission gear is installed at the other end of the rotating seat, and the first drive device meshes with the transmission gear for transmission. The traveling wheels are driven to rotate by the second drive device to realize the overall movement of the crane, which facilitates the straight-line movement and transportation of goods. The rotating seat is driven to rotate by the first drive device to realize the steering of the traveling wheels, which enables the crane to turn, thereby changing the movement path and greatly improving flexibility.
[0009] Furthermore, the second drive unit includes an electric motor and a reducer, both of which are fixedly mounted on the support base. The reducer allows for easy adjustment of the speed, while the electric motor provides power to the traveling wheels.
[0010] Furthermore, two legs at the same end of the upper crossbeam are fixedly connected to a horizontally placed lower crossbeam, on which a battery is installed, supplying power to the first and second drive devices.
[0011] Furthermore, the first driving device is a servo motor, on which an active gear meshes with the transmission gear is mounted on the output shaft. The servo motor can precisely control the amount of rotation, thereby precisely controlling the rotation angle of the rotating seat, and ultimately achieving precise control of the rotation angle of the traveling wheel.
[0012] Furthermore, a tilt angle switch and a charging interface for charging the battery are provided on the lower crossbeam. The charging interface facilitates battery charging, while the tilt angle switch is used to issue an early warning when the ground is uneven, based on the set tilt angle coefficient. If the tilt angle is too large, it can disconnect the power supply to the control circuit and stop the crane in time to protect it.
[0013] Furthermore, the outriggers are equipped with alarms and lidar. The lidar can detect obstacles in the path of the walking wheels or the distance to the destination, thereby sending an electrical signal to the alarm to alert the staff.
[0014] Furthermore, the support base is equipped with mechanical limit switches and buffers. When there are obstacles on the road, the mechanical limit switches can disconnect the power supply to the control circuit in time due to the collision, so as to stop the vehicle. The buffers can play a buffering role when colliding with obstacles in front, so as to prevent the wheels or outriggers from directly colliding with the obstacles and being damaged.
[0015] Furthermore, a wind speed alarm is installed on the upper crossbeam, which facilitates the measurement of wind speed.
[0016] Furthermore, ladders and guardrails are installed on the outriggers to facilitate workers' climbing and maintenance.
[0017] This utility model discloses a DC gantry crane. The second drive device drives the traveling wheels to rotate, thereby realizing the linear movement of the entire crane. The first drive device drives the rotating seat to rotate. Since the traveling wheels are mounted on the rotating seat, the angle of the traveling wheels can be adjusted when the rotating seat rotates, enabling the crane to turn and thus change the direction of movement of the crane, improving the flexibility of the crane. Compared with traditional technology, this technical solution facilitates cargo transportation, improves cargo transportation efficiency, replaces additional transport vehicles, and reduces operating costs. Attached Figure Description
[0018] Figure 1 This is the front view of the present utility model;
[0019] Figure 2 This is the left view of the present invention;
[0020] Figure 3 This is a top view of the present invention;
[0021] Figure 4 This utility model Figure 1 Enlarged view of a portion of point A in the middle;
[0022] Figure 5 This utility model Figure 3 Enlarged view of section B in the middle.
[0023] Reference numerals: 1. Upper crossbeam; 2. Column; 3. Support leg; 4. Rotary seat; 5. Traveling wheel; 6. Support seat; 7. Motor; 8. Reducer; 9. Lower crossbeam; 10. Battery; 11. First drive device; 12. Tilt angle switch; 13. Charging interface; 14. Alarm; 15. LiDAR; 16. Mechanical limit switch; 17. Buffer; 18. Wind speed alarm; 19. Ladder; 20. Guardrail; 21. Transmission gear; 22. Drive gear. Detailed Implementation
[0024] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.
[0025] Example 1:
[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a DC gantry crane, including an upper beam 1 and columns 2 located at both ends of the upper beam 1. Each column 2 at each end of the upper beam 1 includes two legs 3. The two legs 3 located at the same end of the upper beam 1 are respectively disposed on both sides of the upper beam 1. The top of the legs 3 is bolted to the upper beam 1. The bottom of each leg 3 is rotatably connected to a rotating seat 4 via a bearing. A traveling wheel 5 is mounted on the rotating seat 4. The rotating seat 4 is driven by a first drive device 11 to rotate relative to the legs 3. The traveling wheel 5 is driven to rotate by a second drive device. Figure 5 As shown, an electric hoist is installed on the upper crossbeam 1 to facilitate the lifting of goods.
[0027] Preferred, such as Figure 4 and Figure 5As shown, one end of the rotating seat 4 is bolted to or welded to a support seat 6, and the traveling wheel 5 is located inside the support seat 6 and rotates with the support seat 6 through a bearing; the other end of the rotating seat 4 is screwed to install a transmission gear 21, and the first drive device 11 meshes with the transmission gear 21 to drive the transmission. The traveling wheel 5 is driven to rotate by the second drive device to realize the overall movement of the crane, which facilitates the straight-line movement and transportation of goods. The rotating seat 4 is driven to rotate by the first drive device 11 to realize the steering of the traveling wheel 5, which enables the crane to turn, thereby changing the movement path and greatly improving flexibility.
[0028] Preferred, such as Figure 3 As shown, to facilitate the demonstration of the specific structure, two legs on one side of the four support legs 3 in the figure show the internal structure, and one support leg 3 shows the combination structure of the second drive device and the traveling wheel 5 separately, while the other support leg 3 shows the combination structure of the first drive device 11 and the rotating seat 4 separately. The second drive device includes a motor 7 and a reducer 8. Both the motor 7 and the reducer 8 are fixedly mounted on the support seat 6 by bolts. The reducer 8 allows for easy adjustment of the speed, and the motor 7 provides power to the traveling wheel 5.
[0029] Preferred, such as Figure 2 As shown, two legs 3 at the same end of the upper crossbeam 1 are bolted to a horizontally placed lower crossbeam 9. A battery 10 is installed on the lower crossbeam 9 and is bolted to the lower crossbeam 9. The battery 10 supplies power to the first drive device 11 and the second drive device.
[0030] Preferred, such as Figure 4 As shown, the first drive device 11 is a servo motor. The output shaft of the servo motor is fixedly mounted with a drive gear 22 that meshes with the transmission gear 21. The servo motor can precisely control the amount of rotation, thereby precisely controlling the rotation angle of the rotating seat 4, and ultimately achieving precise control of the rotation angle of the walking wheel 5.
[0031] Preferred, such as Figure 2 As shown, a tilt angle switch 12 and a charging interface 13 for charging the battery 10 are installed on the lower crossbeam 9. The charging interface 13 facilitates the charging of the battery 10. The function of the tilt angle switch 12 is to provide an early warning when the ground is uneven, based on the set tilt angle coefficient. When the tilt angle is too large, it can disconnect the power supply of the control circuit and stop the crane in time to protect it.
[0032] Preferred, such as Figure 2 As shown, an alarm 14 and a lidar 15 are installed on the outrigger 3. The lidar 15 can detect obstacles on the walking path of the walking wheel 5 or the distance to the end point, thereby sending an electrical signal to the alarm 14 to alert the staff. The scanning distance of the lidar 1 is 2 meters.
[0033] Preferred, such as Figure 2 As shown, the support base 6 is equipped with a mechanical limit switch 16 and a buffer 17. When there is an obstacle on the road, the mechanical limit switch 16 can disconnect the power supply of the control circuit in time due to the collision, so as to stop the vehicle. The buffer 17 can play a buffering role when it collides with the obstacle in front, so as to prevent the walking wheel 5 or the outrigger 3 and other components from directly colliding with the obstacle and being damaged. Preferably, the upper crossbeam 1 is equipped with a wind speed alarm 18, which is convenient for measuring wind speed. Preferably, the outrigger 3 is equipped with a ladder 19 and a guardrail 20 around the ladder 19, which is convenient for workers to climb and maintain.
[0034] At work, such as Figure 1 , Figure 4 and Figure 5 As shown, the crane's traveling wheels 5 are controlled by DC servo, featuring high control precision, smooth operation, and automatic direction correction. During operation, the crane is controlled by a remote control and the control system. The second drive unit's motor 7 is a DC brushless motor, characterized by high torque and stable starting. The control system uses PLC control and features automatic direction correction, ensuring the crane remains in a straight position. The overall crane system initializes in 10-30 seconds after power-on. The remote control has a human-machine interface that monitors the position of each axis and the adjustability of the direction angle. The remote control has forward, backward, left turn, right turn, stationary rotation, translation, emergency stop, and standby functions. When the forward button is pressed, the traveling wheels 5 drive the crane forward. When the reverse button is pressed, the traveling wheel 5 drives the crane to move backward. When the left turn and forward buttons are pressed, the traveling wheel 5 drives the crane to turn left. Pressing the reverse button performs the opposite action. When the rotation button is pressed, the traveling wheel 5 drives the crane to move 45° in the direction of rotation. After rotation, the traveling wheel 5 drives the crane to start rotating in the same direction. Pressing the spare button performs rotation in the opposite direction. When the traverse button is pressed, the trolley moves 90° in the direction of rotation. Pressing the forward or reverse button enables bidirectional traverse. When the emergency stop button is pressed for 3 seconds, the PLC performs a remote emergency stop operation. Pressing the button again for 3 seconds releases the emergency stop. The human-machine interface allows setting the angle of the traveling wheel 5 in each direction from a maximum of 90° to a minimum of -45°. Compared with traditional technology, this technical solution facilitates cargo transportation, improves cargo transportation efficiency, replaces additional transport vehicles, and reduces operating costs.
[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.
Claims
1. A direct current gantry crane comprising an upper cross beam (1) and upright columns (2) at both ends of the upper cross beam (1), characterized in that: The column (2) at each end of the upper cross beam (1) comprises two legs (3), the two legs (3) at the same end of the upper cross beam (1) are arranged on the two sides of the upper cross beam (1), the top of the leg (3) is fixedly connected with the upper cross beam (1), the bottom of each leg (3) is rotatably connected with a rotating seat (4), the rotating seat (4) is installed with a walking wheel (5), the rotating seat (4) is driven by a first driving device (11) to rotate relative to the leg (3), and the walking wheel (5) is driven to rotate by a second driving device.
2. The direct current gantry crane of claim 1, characterized in that: One end of the rotating seat (4) is fixedly connected with a support seat (6), the walking wheel (5) is located in the support seat (6) and is rotatably connected with the support seat (6); the other end of the rotating seat (4) is installed with a transmission gear (21), and the first driving device (11) is in meshing transmission with the transmission gear (21).
3. The direct current gantry crane of claim 2, characterized in that: The second driving device comprises a motor (7) and a speed reducer (8), and the motor (7) and the speed reducer (8) are fixedly installed on the support seat (6).
4. The direct current gantry crane of claim 1, characterized by: The two legs (3) at the same end of the upper cross beam (1) are fixedly connected with a horizontally placed lower cross beam (9), the lower cross beam (9) is provided with a storage battery (10), and the storage battery (10) supplies power for the first driving device (11) and the second driving device.
5. The direct current gantry crane of claim 1, characterized by: The first driving device (11) is a servo motor, and a driving gear (22) in meshing transmission with the transmission gear (21) is installed on the output shaft of the servo motor.
6. The direct current gantry crane of claim 4, characterized by: An inclination angle switch (12) and a charging interface (13) for charging the storage battery (10) are arranged on the lower cross beam (9).
7. The direct current gantry crane of claim 1, characterized by: An alarm (14) and a laser radar (15) are installed on the leg (3).
8. The direct current gantry crane of claim 2, characterized by: A mechanical limit (16) and a buffer (17) are installed on the support seat (6).
9. The direct current gantry crane of claim 1, characterized by: The upper cross beam (1) is installed with a wind speed alarm (18).
10. The direct current gantry crane of claim 1, characterized by: A ladder (19) and a guardrail (20) arranged around the ladder (19) are installed on the leg (3).