A high-efficiency electric single-girder crane

Abstract

This application relates to the field of single-girder cranes and discloses a high-efficiency electric single-girder crane, including two supporting beams. Each of the two supporting beams has a movable support on its top surface. A traveling assembly is installed inside the movable support. A crane support beam is fixedly installed on the top surface of the movable support. An electric hoist is installed on the bottom surface of the crane support beam. A lifting rope is wound and connected inside the electric hoist, and a hook is fixedly installed at the bottom end of the lifting rope. Buffer mechanisms are respectively installed at the left and right ends of the movable support. The buffer pad directly contacts the impacting object and absorbs the initial impact force through its own elastic deformation. The buffer spring then compresses for further buffering. Combined with a proximity switch for real-time monitoring and triggering braking, a multi-level, high-efficiency buffer protection system is formed, avoiding the problems of sensor damage and structural fatigue. It can operate stably for a long time, effectively reducing the failure rate and maintenance costs.

Description

Technical Field

[0001] This application belongs to the field of single-girder crane technology, specifically a high-efficiency electric single-girder crane. Background Technology

[0002] Electric single-girder cranes are a type of light-duty lifting equipment that runs on rails. They mainly consist of metal structures such as main beams and end beams, as well as an electric hoist (including a motor, reducer, drum, and hook). During operation, the electric motor drives the drum via the reducer to lift heavy objects. At the same time, the trolley traveling mechanism drives the wheels to move the crane longitudinally along the rails. Its characteristics include simple and lightweight structure, convenient installation and maintenance, low price, flexible operation, and high working efficiency. However, it has a lower working level, limited stability, limited lifting height, and certain limitations on applicable environments. It is widely used in machinery manufacturing, assembly, warehouses, docks, and other places.

[0003] For example, the utility model patent with announcement number CN221739704U discloses an electric single-girder crane, which includes a truss one, a guide chute and a track. The truss one has truss two welded to its left and right ends respectively. The front and rear ends of the lower surface of the truss two are fixedly connected to the fixed frame. The inside of the fixed frame is rotatably connected to the roller through the pin shaft. The guide chute is opened inside the front and rear ends of the two trusses two. The inside of the guide chute is equipped with an anti-collision mechanism. This electric single-girder crane, based on the sensor, adds a buffer device to absorb and reduce vibration, reduce the degree of vibration transmitted to the crane, thereby protecting the structure and key components of the crane, and gradually releasing and dispersing the energy during the collision.

[0004] However, in actual use, it was found that the device absorbs and disperses impact force through a multi-layer structure to reduce the impact of collisions and protect components.

[0005] However, the anti-collision mechanism of this device consists of many components such as the first shock absorber, spring one, slider one, guide groove, support rod, slider two, second shock absorber, and spring two. The overall structure is complex, which greatly increases the difficulty of installation and debugging. Subsequent disassembly and maintenance are also extremely inconvenient. Moreover, the pressure sensor is easily damaged when subjected to object collisions for a long time, which not only increases maintenance costs, but may also cause the anti-collision function to fail due to sensor failure, affecting the safe operation of the crane. Therefore, a high-efficiency electric single-girder crane is provided. Utility Model Content

[0006] The purpose of this application is to provide an efficient electric single-girder crane in order to solve the problems mentioned above.

[0007] The technical solution adopted in this application is as follows: A high-efficiency electric single-girder crane includes two supporting beams. The top surfaces of the two supporting beams are provided with movable supports. The movable supports are provided with a traveling component inside. A crane support beam is fixedly installed on the top surface of the movable supports. An electric hoist is provided on the bottom surface of the crane support beam. A lifting rope is wound and connected inside the electric hoist. A hook is fixedly installed at the bottom end of the lifting rope. Buffer mechanisms are provided at the left and right ends of the movable supports respectively.

[0008] The buffer mechanism includes a connecting plate, a fixed sleeve, an inner support shaft, a fixed plate, a first buffer pad, a buffer spring, a proximity switch, a fixed baffle, and a second buffer pad. Connecting plates are fixedly installed at both ends of the movable bracket. A fixed sleeve is fixedly installed through one side of the connecting plate. An inner support shaft is movably fitted in the middle of the fixed sleeve. A fixed plate is fixedly installed at one end of the inner support shaft. A first buffer pad is fixedly installed on the side of the fixed plate away from the inner support shaft. A buffer spring is provided on the outer surface of the fixed sleeve. One end of the buffer spring is fixed to one side of the fixed plate. A proximity switch is fixedly installed through one side of the connecting plate. A fixed baffle is fixedly installed on the top surface of the support beam. A second buffer pad is fixedly installed on one side of the fixed baffle.

[0009] In a preferred embodiment, a mounting housing is fixedly installed on the outer surface of the electric hoist, a laser rangefinder sensor is fixedly installed through the bottom surface of the mounting housing, and a circular measuring plate is fixedly installed on the top of the hook by bolts.

[0010] In a preferred embodiment, the walking assembly includes a limiting protrusion, a walking roller, an external gear ring, a walking motor, and a gear shaft. The limiting protrusion is fixedly installed on the top surface of the supporting beam. Two walking rollers are rotatably connected to the inside of the movable bracket above the limiting protrusion, and the two walking rollers can roll along the limiting protrusion. An external gear ring is fixedly installed on the outer surface of one of the two walking rollers. A walking motor is fixedly installed on one side of the movable bracket, and a gear shaft is fixedly installed on the drive end of the walking motor. The gear shaft extends into the interior of the movable bracket and meshes with the external gear ring.

[0011] In a preferred embodiment, a plurality of connecting limiting rods are movably inserted through one side of the connecting plate, and one end of each of the plurality of connecting limiting rods is fixed to one side of the fixing plate.

[0012] In a preferred embodiment, an end limiting plate is fixedly installed at the end of the inner support shaft away from the fixed plate.

[0013] In a preferred embodiment, a limiting annular groove is formed on the outer surface of the traveling roller, and the top end of the limiting protrusion extends into the interior of the limiting annular groove.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0015] 1. In this application, by adopting the above-mentioned solution, the cooperation between the set walking component and the electric hoist facilitates mobile hoisting operations. When the moving support collides during movement, the buffer spring is quickly compressed, and together with buffer pad one and buffer pad two, the impact force generated by the collision is absorbed in stages, effectively reducing the collision intensity. At the same time, the fixed plate moves under the impact force. When it reaches the set position, the proximity switch is triggered and energized, and the signal is fed back to the control system in real time. This facilitates the rapid braking of the walking component and avoids secondary collisions or damage. The buffer pad of this device directly contacts the colliding object and absorbs the initial impact force through its own elastic deformation. The buffer spring is then compressed for further buffering. With the proximity switch monitoring and triggering braking in real time, a multi-level and efficient buffer protection system is formed, avoiding the problems of sensor damage and structural fatigue. It can operate stably for a long time and effectively reduce the failure rate and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a schematic diagram of the movable support structure of this application;

[0018] Figure 3 This is a schematic diagram of the mounting housing structure of this application;

[0019] Figure 4 This is a schematic diagram of the circular measuring plate structure of this application.

[0020] The markings in the diagram are: 1. Support beam; 2. Moving bracket; 3. Traveling assembly; 301. Limiting protrusion; 302. Traveling roller; 303. External gear ring; 304. Traveling motor; 305. Gear shaft; 4. Crane support beam; 5. Electric hoist; 6. Lifting rope; 7. Hook; 8. Buffer mechanism; 801. Connecting plate; 802. Fixing sleeve; 803. Inner support shaft; 804. Fixing plate; 805. Buffer pad one; 806. Buffer spring; 807. Proximity switch; 808. Fixing baffle; 809. Buffer pad two; 9. Mounting housing; 10. Laser rangefinder sensor; 11. Circular measuring plate; 12. Connecting limit rod; 13. End limit plate; 14. Limiting ring groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] refer to Figures 1-4 As shown, a high-efficiency electric single-girder crane includes two supporting beams 1, each with a movable support 2 on its top surface. The movable support 2 has a traveling component 3 inside. The supporting beams provide stable foundation support for the entire crane, ensuring overall stability during operation. The movable support 2 and the traveling component 3 work together to allow the crane to move on the supporting beams 1, expanding the crane's working range and improving operational flexibility.

[0023] refer to Figures 1-4 As shown, the traveling assembly 3 includes a limiting protrusion 301, traveling rollers 302, an external gear ring 303, a traveling motor 304, and a gear shaft 305. The limiting protrusion 301 is fixedly installed on the top surface of the supporting beam 1. The interior of the moving bracket 2 is rotatably connected to two traveling rollers 302 above the limiting protrusion 301. The outer surface of the traveling rollers 302 is provided with a limiting annular groove 14. The top of the limiting protrusion 301 extends into the interior of the limiting annular groove 14, and the two traveling rollers 302 can roll along the limiting protrusion 301. Through the cooperation of the limiting protrusion 301 and the limiting annular groove 14 of the traveling rollers 302, the moving direction of the moving bracket 2 can be effectively restricted, preventing it from deviating or derailing during operation, thus improving the safety and stability of the crane operation. The rolling of the traveling rollers 302 reduces the friction between the moving bracket and the supporting beam, reduces energy consumption, and improves operating efficiency.

[0024] refer to Figures 1-4 As shown, an external gear ring 303 is fixedly installed on the outer surface of one of the two traveling rollers 302. A traveling motor 304 is fixedly installed on one side of the moving bracket 2. A gear shaft 305 is fixedly installed on the drive end of the traveling motor 304. The gear shaft 305 extends into the interior of the moving bracket 2 and meshes with the external gear ring 303. The traveling motor 304 facilitates the meshing and transmission between the gear shaft 305 and the external gear ring 303, and can precisely control the rotation of the traveling rollers 302, thereby achieving smooth and precise movement of the moving bracket 2. This can meet the movement requirements of the crane under different working conditions.

[0025] refer to Figures 1-4As shown, a crane support beam 4 is fixedly installed on the top surface of the mobile support 2, and an electric hoist 5 is installed on the bottom surface of the crane support beam 4. A lifting rope 6 is wound and connected inside the electric hoist 5, and a hook 7 is fixedly installed at the bottom end of the lifting rope 6. Buffer mechanisms 8 are respectively installed at the left and right ends of the mobile support 2. The crane support beam 4 provides reliable installation support for the electric hoist 5, ensuring the stability of the lifting operation. A transverse traveling mechanism connected to the electric hoist 5 is installed above it. The transverse traveling mechanism also uses a motor-driven roller to enable the electric hoist 5 to move laterally left and right. The electric hoist 5 is a lifting system composed of a motor, reducer, drum, lifting rope, and hook. It can lift and lower heavy objects, is easy to operate, and has high lifting efficiency. The buffer mechanism 8 can effectively absorb the impact force when the mobile support 2 collides during movement, protect the crane components, reduce equipment damage and maintenance costs, and improve operational safety.

[0026] refer to Figures 1-4 As shown, the buffer mechanism 8 includes a connecting plate 801, a fixed sleeve 802, an inner support shaft 803, a fixed plate 804, a first buffer pad 805, a buffer spring 806, a proximity switch 807, a fixed baffle 808, and a second buffer pad 809. The connecting plate 801 is fixedly installed at both ends of the movable bracket 2. A fixed sleeve 802 is fixedly installed through one side of the connecting plate 801. The inner support shaft 803 is movably sleeved in the middle of the fixed sleeve 802. An end limiting plate 13 is fixedly installed at the end of the inner support shaft 803 away from the fixed plate 804. Through the buffer mechanism 8, the buffer spring 806 can... The elastic deformation and buffer pad provide multi-layered absorption of collision energy. The fixed plate 804 is made of metal, allowing the proximity switch 807 to detect the collision risk in advance when the fixed plate 804 approaches, and take timely measures to further improve the buffering effect and safety. There are various models of proximity switch 807, each with a different sensing distance. The specific model can be selected according to actual debugging needs. This application provides an E2E-X10ME1 proximity switch 807 model with an end limiting plate 13, which can effectively prevent the inner support shaft 803 from coming out of the fixed sleeve 802, ensuring the integrity and reliability of the buffer mechanism structure.

[0027] refer to Figures 1-4 As shown, a fixing plate 804 is fixedly installed at one end of the inner support shaft 803, and multiple connecting limit rods 12 are movably passed through one side of the connecting plate 801, with one end of each connecting limit rod 12 fixed to one side of the fixing plate 804. The connecting limit rods 12 restrict the movement direction and range of the fixing plate 804, ensuring the stability of the buffer mechanism during operation, enabling the buffer spring 806 and buffer pad to function properly, and enhancing the overall performance of the buffer mechanism.

[0028] refer to Figures 1-4 As shown, a buffer pad 805 is fixedly installed on the side of the fixed plate 804 away from the inner support shaft 803. A buffer spring 806 is provided on the outer surface of the fixed sleeve 802. One end of the buffer spring 806 is fixed to one side of the fixed plate 804. A proximity switch 807 is fixedly installed through one side of the connecting plate 801. A fixed baffle 808 is fixedly installed on the top surface of the support beam 1. A buffer pad 809 is fixedly installed on one side of the fixed baffle 808. The buffer pads 805 and 809 directly contact the colliding object and absorb energy through their own elastic deformation to reduce the impact force. The buffer spring 806 can compress and store energy during the collision to slow down the collision speed and further reduce the impact force. The proximity switch 807 can monitor the distance between the moving bracket 2 and the fixed baffle 808 in real time. When the distance reaches the set value, it can trigger an early warning or control the moving bracket 2 to decelerate and avoid violent collision.

[0029] refer to Figures 1-4 As shown, an installation housing 9 is fixedly installed on the outer surface of the electric hoist 5. A laser rangefinder sensor 10 is fixedly installed on the bottom surface of the installation housing 9. A circular measuring plate 11 is fixedly installed on the top of the hook 7 by bolts. The installation housing 9 is made of high-strength, impact-resistant engineering plastic material, which facilitates the protection of the installed laser rangefinder sensor 10. The laser rangefinder sensor 10 is based on the TOF (Time of Flight) principle. It emits a laser beam and measures the round-trip time after it is reflected by the circular measuring plate 11 to accurately calculate the real-time distance between the hook 7 and the electric hoist 5. When the two work together, the system can feed the measurement data back to the crane's control system in real time. This allows the operator to plan the hoisting path in advance based on the accurate distance data, optimize the lifting and lowering operation process, significantly improve the accuracy and efficiency of the hoisting operation, and truly achieve the goal of efficient and safe hoisting operation.

[0030] The implementation principle of this application's embodiment of a high-efficiency electric single-girder crane is as follows: The operator first starts the traveling motor 304, which drives the gear shaft 305 to rotate. Through meshing transmission with the external gear ring 303, the traveling roller 302 is driven to roll along the limiting protrusion 301, realizing the smooth movement of the moving support 2 on the supporting beam 1 and accurately adjusting the working position of the electric hoist 5. When lifting operations are required, the electric hoist 5 is started, and the lifting hook 7 is raised and lowered by the raising and lowering of the lifting rope 6 to complete the lifting and lowering operations of the heavy object. During operation, if the moving support 2 is accidentally collided, the buffer spring 806 will be quickly compressed, in conjunction with the buffer... Pad 1 805 and buffer pad 2 809 absorb the impact force generated by the collision in stages, effectively reducing the collision intensity. At the same time, the fixed plate 804 moves under the impact force. When it reaches the set position, the proximity switch 807 is triggered and energized, and the signal is fed back to the control system in real time. This facilitates the rapid braking of the walking component 3 and avoids secondary collisions or damage. In addition, through the cooperation of the laser range sensor 10 and the circular measuring plate 11, the distance between the hook 7 and the electric hoist 5 can be monitored in real time, providing data support for the operator to plan the hoisting path and adjust the hoisting speed in advance, which significantly improves the safety and efficiency of the operation.

[0031] When a collision occurs, the buffer pad directly contacts the object it collides with, absorbing the initial impact force through its own elastic deformation. The buffer spring 806 then compresses for further buffering. In conjunction with the proximity switch 807, it monitors and triggers braking in real time, forming a multi-level, efficient buffer protection system. This avoids the problems of sensor damage and structural fatigue, and can operate stably for a long time, effectively reducing the failure rate and maintenance costs.

[0032] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A high-efficiency electric single-girder crane, comprising two supporting beams (1), characterized in that: The top surfaces of the two supporting beams (1) are provided with movable brackets (2), the interior of the movable brackets (2) is provided with walking components (3), the top surface of the movable brackets (2) is fixedly installed with crane support beams (4), the bottom surface of the crane support beams (4) is provided with electric hoists (5), the interior of the electric hoists (5) is wound with lifting ropes (6), the bottom end of the lifting ropes (6) is fixedly installed with hooks (7), and the left and right ends of the movable brackets (2) are respectively provided with buffer mechanisms (8). The buffer mechanism (8) includes a connecting plate (801), a fixed sleeve (802), an inner support shaft (803), a fixed plate (804), a first buffer pad (805), a buffer spring (806), a proximity switch (807), a fixed baffle (808), and a second buffer pad (809). The connecting plate (801) is fixedly installed at both ends of the movable bracket (2). A fixed sleeve (802) is fixedly installed through one side of the connecting plate (801). An inner support shaft (803) is movably sleeved in the middle of the fixed sleeve (802). A fixing plate (804) is fixedly installed at one end of the fixed plate (804) away from the inner support shaft (803). A buffer pad (805) is fixedly installed on the side of the fixed plate (804) away from the inner support shaft (803). A buffer spring (806) is provided on the outer surface of the fixing sleeve (802). One end of the buffer spring (806) is fixed to one side of the fixing plate (804). A proximity switch (807) is fixedly installed through one side of the connecting plate (801). A fixing baffle (808) is fixedly installed on the top surface of the support beam (1). A buffer pad (809) is fixedly installed on one side of the fixing baffle (808).

2. The high-efficiency electric single-girder crane as described in claim 1, characterized in that: The electric hoist (5) has a mounting housing (9) fixedly installed on its outer surface. A laser rangefinder (10) is fixedly installed on the bottom surface of the mounting housing (9). A circular measuring plate (11) is fixedly installed on the top of the hook (7) by bolts.

3. The high-efficiency electric single-girder crane as described in claim 1, characterized in that: The walking assembly (3) includes a limiting protrusion (301), a walking roller (302), an external gear ring (303), a walking motor (304), and a gear shaft (305). The limiting protrusion (301) is fixedly installed on the top surface of the supporting beam (1). The interior of the moving bracket (2) is rotatably connected to two walking rollers (302) above the limiting protrusion (301), and the two walking rollers (302) can roll along the limiting protrusion (301). An external gear ring (303) is fixedly installed on the outer surface of one of the two walking rollers (302). A walking motor (304) is fixedly installed on one side of the moving bracket (2). A gear shaft (305) is fixedly installed on the drive end of the walking motor (304). The gear shaft (305) extends into the interior of the moving bracket (2) and meshes with the external gear ring (303).

4. The high-efficiency electric single-girder crane as described in claim 1, characterized in that: A plurality of connecting limit rods (12) are movably inserted through one side of the connecting plate (801), and one end of each of the plurality of connecting limit rods (12) is fixed to one side of the fixing plate (804).

5. A high-efficiency electric single-girder crane as described in claim 1, characterized in that: An end limiting plate (13) is fixedly installed at the end of the inner support shaft (803) away from the fixed plate (804).

6. A high-efficiency electric single-girder crane as described in claim 3, characterized in that: The outer surface of the traveling roller (302) is provided with a limiting annular groove (14), and the top of the limiting protrusion (301) extends into the interior of the limiting annular groove (14).

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