An electric single-beam crane and a remote control system thereof

Abstract

The application discloses an electric single-beam crane and a remote control system thereof, and relates to the technical field of electric single-beam cranes, which comprises a first truss and a balancing device. The PLC control unit, the wireless module, the remote monitoring terminal, the multi-angle camera and the power driving component are arranged to meet the remote control of the electric single-beam crane. Meanwhile, the remote monitoring terminal and the multi-angle camera can respectively realize the real-time capture and monitoring of the crane data and state during the lifting process. The balancing device is arranged at the upper end of the first truss, that is, the driving assembly arranged at the upper end of the metal frame can drive the four side winding assemblies, so that the steel rope can be lowered or lifted during the lifting process, the electric hoist body is balanced during lifting, the shaking problem is reduced, and the balancing and shaking buffering effects of the steel rope during lifting are further improved, so that the electric hoist body is more stable and safe during lifting.

Description

Technical Field

[0001] This invention relates to the field of electric single-girder crane technology, specifically to an electric single-girder crane and its remote control system. Background Technology

[0002] With the deepening of international trade, large containers are increasingly used as important cargo loading equipment. Electric single-girder cranes are large-scale special-purpose machinery for container loading, unloading and transfer. Due to their high reliability, stable operation and high efficiency, they have become a commonly used container lifting equipment.

[0003] An electric single-girder crane is a type of equipment used for lifting and transporting goods. It mainly utilizes the longitudinal movement of the equipment on the beam along the track to lift and transport materials from the lower end of the beam. It can be used without being obstructed by ground equipment and is a widely used and numerous type of lifting equipment.

[0004] An existing electric single-girder crane with application number CN202420183280.3 includes a truss I, guide chutes, and a rail. Truss I has truss II welded to its left and right ends, and fixed frames are fixedly connected to the front and rear ends of the lower surface of truss II. Rollers are rotatably connected to the interior of each fixed frame via pins. Guide chutes are located inside the front and rear ends of the two trusses II, and each guide chute is equipped with an anti-collision mechanism. The end of the anti-collision mechanism furthest from the center of the truss II extends to the exterior of the front and rear ends of the two trusses II. The rail is located at the bottom of truss I, and an electric hoist is slidably connected to the inner wall of the rail. This electric single-girder crane, based on the presence of sensors, adds a buffer device to absorb and dampen vibrations, reducing the degree of vibration transmitted to the crane, thereby protecting the crane's structure and key components, and allowing the energy during a collision to be gradually released and dispersed.

[0005] The existing electric single-girder cranes mentioned above can provide a certain collision buffer effect when the truss moves to protect the overall structure of the crane. However, during the hoisting process, the method of hooking the container with the electric hoist alone has the problem of hoisting sway. That is, during the high-altitude hoisting process, there is a lack of balance and stabilization measures to ensure the stability of the container during hoisting. The occurrence of sway will lead to the risk of hoisting deviation or falling. Summary of the Invention

[0006] The purpose of this invention is to provide an electric single-girder crane and its remote control system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In one aspect, this application proposes an electric single-girder crane, comprising a first truss, with second trusses mounted on the lower ends of both sides of the first truss. A connecting frame is provided at the lower middle end of the first truss, and an electric hoist body is mounted at the bottom of the connecting frame. An electrical control box is provided at the left front end of the connecting frame, and a first motor is provided opposite to the right side of the electrical control box. The output end of the first motor is connected to a roller, which is connected to the lower front and rear ends of the first truss. A second motor is mounted on one side of the rear end of the second truss, and the output end of the second motor is connected to a guide wheel, which is connected to an external rail. The application also includes a balancing device located at the upper end of the first truss, the balancing device comprising a guide rail. A guide rail is horizontally installed on the upper end of the first truss. A connecting seat is slidably mounted on the upper end of the guide rail. A connecting plate is bolted to the front side of the connecting seat, and the bottom of the connecting plate is connected to the connecting frame. A metal frame is installed on the top of the connecting seat. A drive assembly is provided on the upper end of the metal frame. The drive assembly is connected to the winding assembly on all four sides, and the winding assembly is installed at the four corners of the metal frame. A steel rope is wound inside the winding assembly, and the lower end of the steel rope is connected to the hook end of the electric hoist body. Guide assemblies are installed on all four sides of the metal frame, and the guide assemblies are connected to the outside of the steel rope. The guide assemblies are provided on all four sides of the metal frame and are sleeved on the outside of the steel rope. Tensioning assemblies are provided inside all four sides of the metal frame.

[0009] Preferably, the drive assembly includes a servo motor, which is mounted on the upper middle part of the metal frame. The top output end of the servo motor is connected to a first bevel gear set. A first rotating rod is laterally connected to the middle of the first bevel gear set. Second bevel gear sets are installed on both the left and right sides of the first rotating rod. A second rotating rod is longitudinally connected to the middle of the second bevel gear set. A third bevel gear set is installed on both the front and rear sides of the second rotating rod, and the lower end of the third bevel gear set is connected to the winding assembly.

[0010] Preferably, the winding assembly includes a protective cylinder, which is located at the lower end of the third bevel gear set. A rotating shaft is rotatably mounted inside the protective cylinder. The upper end of the rotating shaft is connected to the third bevel gear set, and a winding roller is provided on the outer side of the lower end of the rotating shaft. A steel rope is wound on the outer side of the winding roller. A pulley set is provided on the outer side of the upper end of the rotating shaft. The pulley set is connected to the rotating cylinder on the side away from the rotating shaft. The rotating cylinder is rotatably mounted inside the protective cylinder. A docking ring is sleeved on the outside of the rotating cylinder. A convex shaft is provided on one side of the docking ring and is inserted into the rotating cylinder. A docking frame is installed on one side of the docking ring, and a roller is rotatably mounted on the side of the docking frame away from the docking ring. A steel rope is inserted between the roller and the docking frame.

[0011] Preferably, the tensioning assembly includes a drive motor located inside the four sides of the metal frame. The top output end of the drive motor is connected to a screw. A connecting cylinder is threaded onto the outside of the screw. The upper end of the connecting cylinder is rotatably connected to a top block. The top block is built into a guide frame, and the lower middle part of the guide frame is vertically positioned and connected to the connecting cylinder. First connecting arms are rotatably mounted on both sides of the top block. The upper ends of the first connecting arms on both sides are connected to second connecting arms. The middle part of the second connecting arm is connected to a fixing frame, and the end of the second connecting arm away from the first connecting arm is connected to a third connecting arm. The lower end of the fixing frame is fixed to the guide frame. The end of the third connecting arm away from the second connecting arm is rotatably connected to a connecting shell, and the connecting shell is installed on the upper side inside the guide frame. A connecting shaft is inserted into the lower end of the connecting shell. A pressure plate is installed at the bottom of the connecting shaft. A spring is installed inside the connecting shell, and the bottom of the spring is connected to the top of the connecting shaft.

[0012] Preferably, the guiding assembly includes a guide cylinder inserted into the four sides of the metal frame. The guide cylinder has connecting shafts on both sides of its middle section, and the guide cylinder is rotatably connected to the inside of the metal frame through the connecting shafts on both sides. A swing frame is installed on the outside of the connecting shaft, and a rubber wheel is rotatably installed at the lower end of the swing frame. The bottom of the rubber wheel abuts against a pressure strip. Guide rods are inserted into both sides of the pressure strip, and the upper and lower ends of the guide rods are connected to the inside of the metal frame. A buffer spring is installed at the lower end of the guide rod, and the top of the buffer spring abuts against the pressure strip.

[0013] Preferably, the steel ropes are distributed along the four sides of the metal frame, and the steel ropes on the four sides are respectively connected to the front and rear sides of the hook claw end of the electric hoist body.

[0014] Preferably, the rotating drum has a circulating transmission groove on its outside, and the rotating drum is connected to a convex shaft on one side of the docking ring through the groove.

[0015] Preferably, the top block, connecting shell, and pressure plate are respectively limited and built into the lower and upper ends of the guide frame, and there is a gap between the pressure plate and the top block.

[0016] Preferably, the swing frame is arranged in an inverted V-shape, and the rubber wheels installed on both sides of the bottom of the swing frame abut against the upper end of the pressure strip.

[0017] Secondly, this application also proposes a remote control system for an electric single-girder crane, including a PLC control unit, a wireless module, a remote monitoring terminal, a multi-angle camera, and a power drive component located inside the electrical control box. The PLC control unit is connected to the control terminal via the wireless module, and the wireless module, the remote monitoring terminal, the multi-angle camera, and the power drive component are all connected to the PLC control unit.

[0018] The PLC control unit is responsible for automated logic operations, collecting crane operation data, and issuing execution instructions.

[0019] The wireless module is used for wireless network connection between the PLC control unit and the control terminal, and for real-time data transmission synchronization;

[0020] The remote monitoring terminal is used to receive and execute remote control commands and to detect real-time data of current, voltage, speed, and position.

[0021] The multi-angle camera is used to capture images of the crane hook, load and surrounding environment in real time, and transmits the images to the control terminal synchronously in combination with wireless video technology.

[0022] The power drive component is used for crane hoisting operation and position adjustment.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This invention enables remote control of an electric single-girder crane by incorporating a PLC control unit, a wireless module, a remote monitoring terminal, a multi-angle camera, and a power drive component. The remote monitoring terminal and multi-angle camera can simultaneously detect real-time data on the crane's current, voltage, speed, and position during the lifting process, as well as capture real-time images of the crane hook, load, and surrounding environment. A balancing device, specifically a drive assembly located on the upper part of the metal frame, is installed at the top of the first truss. This device drives the four-sided winding assembly, coordinating with the lifting process to lower or raise the steel rope, thus aiding in the balance of the electric hoist body and reducing swaying. Furthermore, the tensioning and guiding components further enhance the balance and sway buffering effect of the steel rope lifting, making the lifting of the electric hoist body more stable and safe.

[0025] The winding assembly, specifically the third bevel gear set, allows the rotation of the shaft inside the protective cylinder when engaged. This enables the winding rollers mounted outside the shaft to rotate synchronously, accommodating the descent and ascent of the steel rope. This adapts to electric hoist lifting activities, ensuring balanced lifting of the electric hoist by the steel ropes on all four sides. Simultaneously, the pulley set mounted on the upper end of the shaft rotates synchronously, rotating the drum connected to the other end. The connecting ring, located outside the drum and engaging with a groove on its exterior, can reciprocate. The steel rope passing between the connecting frame and the roller can be adjusted in winding position through the movement of the connecting ring, ensuring even winding around the outside of the winding rollers during subsequent winding. This avoids a single winding position and limited winding space.

[0026] The tensioning assembly, driven by the screw and connecting cylinder thread, allows the lower end of the guide frame's rising block to move upwards. As the block moves upwards, the steel rope is pre-lifted. Simultaneously, as the block moves upwards, the first connecting arm on both sides lifts the second connecting arm, which in turn pushes down the third connecting arm. Consequently, the connecting shell located at the upper end of the guide frame moves downwards, pushing down the pressure plate at its bottom to engage with the rising block, thus compressing and tightening the steel rope. Furthermore, the spring inside the connecting shell and the insertion shaft provide elastic compression. Therefore, the tension of the four steel ropes can be flexibly adjusted according to different situations to achieve balanced lifting of the electric hoist under various conditions.

[0027] The guide assembly allows a steel rope to be inserted into the guide cylinder for guidance during installation and use. Simultaneously, in conjunction with the connecting shafts on both sides, the guide cylinder can rotate in sync with the steel rope winding. Furthermore, the swing frame mounted outside the connecting shafts rotates synchronously, working with rubber wheels on both sides of the bottom to compress the pressure strips at the bottom. These pressure strips then move downwards along the guide rods on both sides, compressing the buffer springs at the bottom of the guide rods, thus providing a guiding and buffering effect to reduce swaying of the steel rope during use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of the electric single-girder crane of the present invention;

[0030] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0031] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0032] Figure 5 This is a schematic diagram of the remote control system of the present invention;

[0033] Figure 6 This is a schematic diagram of the overall structure of the balancing device of the present invention;

[0034] Figure 7 This is a front view of the internal structure of the winding assembly of the present invention;

[0035] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C;

[0036] Figure 9 This is a three-dimensional structural diagram of the tensioning component of the present invention;

[0037] Figure 10 This is a schematic diagram of the internal structure of the tensioning component of the present invention;

[0038] Figure 11 This is a three-dimensional structural diagram of the guide component of the present invention.

[0039] In the diagram: First truss-1, Second truss-2, Connecting frame-3, Electric hoist body-4, Electrical control box-5, First motor-6, Roller-7, Second motor-8, Guide wheel-9, Balancing device-10, Guide rail-101, Connecting seat-102, Connecting plate-103, Metal frame-104, Drive assembly-105, Servo motor-1051, First bevel gear set-1052, First rotating rod-1053, Second bevel gear set-1054, Second rotating rod-1055, Third bevel gear set-1056, Winding assembly-106, Protective cylinder-1061, Rotating shaft-1062, Winding roller-1063, Pulley set-1064, Rotating drum-1065, Connecting ring-10 66. Convex shaft - 1067. Connecting frame - 1068. Roller - 1069. Steel rope - 107. Tensioning assembly - 108. Drive motor - 1081. Screw - 1082. Connecting cylinder - 1083. Top block - 1084. Guide frame - 1085. First connecting arm - 1086. Second connecting arm - 1087. Fixing frame - 1088. Third connecting arm - 1089. Connecting shell - 10810. Inserting shaft - 10811. Pressure plate - 10812. Spring - 10813. Guide assembly - 109. Guide cylinder - 1091. Connecting shaft - 1092. Swing frame - 1093. Rubber wheel - 1094. Pressure strip - 1095. Guide rod - 1096. Buffer spring - 1097. Detailed Implementation

[0040] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0041] Please see Figures 1-4 This application proposes an electric single-girder crane, including a first truss 1, with second trusses 2 installed at the lower ends of both the left and right sides of the first truss 1. A connecting frame 3 is provided at the lower middle part of the first truss 1, and an electric hoist body 4 is installed at the bottom of the connecting frame 3. An electric control box 5 is provided at the left front end of the connecting frame 3, and a first motor 6 is provided opposite to the right side of the electric control box 5. The output end of the first motor 6 is connected to a roller 7, which is connected to the lower front and rear sides of the first truss 1, thus satisfying the lateral movement of the electric hoist body 4. A second motor 8 is installed on one side of the rear end of the second truss 2, and the output end of the second motor 8 is connected to a guide wheel 9, which is connected to an external rail, thus satisfying the forward and backward movement of the first truss 1 and the second truss 2. The application also includes a balancing device 10 located at the upper end of the first truss 1.

[0042] Specifically, when container hoisting is required, the electric hoist body 4 can be operated to lower the hook end to connect with the container hoisting point. When the electric hoist body 4 is retracted, the hook end can lift the container. In conjunction with the operation of the first motor 6 and the roller 7, the electric hoist body 4 can move laterally left and right along the lower end of the first truss 1 to meet the adjustment of the lateral position of the hoisting. Through the operation of the second motor 8 and the guide wheel 9, the first truss 1 and the second truss 2 can be moved back and forth to meet the adjustment of the hoisting position and meet different container hoisting conditions.

[0043] On the other hand, please see Figure 5 Furthermore, a remote control system for an electric single-girder crane is proposed, including a PLC control unit, a wireless module, a remote monitoring terminal, a multi-angle camera, and a power drive component located inside the electrical control box 5. The PLC control unit communicates with the control terminal through the wireless module, and the wireless module, the remote monitoring terminal, the multi-angle camera, and the power drive component are all communicated with the PLC control unit.

[0044] The PLC control unit is responsible for automated logic operations, collecting crane operation data, and issuing execution commands.

[0045] The wireless module is used for wireless network connection between the PLC control unit and the control terminal, and for real-time data transmission and synchronization.

[0046] The remote monitoring terminal is used to receive and execute remote control commands, and to detect real-time data of current, voltage, speed and position. The remote monitoring terminal includes an integrated HMI touch screen, current transformer, voltage transmitter and encoder.

[0047] Multi-angle cameras are used to capture images of the crane hook, load, and surrounding environment in real time, and the images are transmitted synchronously to the control terminal using wireless video technology.

[0048] The power drive component is used for crane lifting, operation, and position adjustment, and is composed of mechanical equipment such as motors and electric hoists.

[0049] Please see Figures 6-8In this embodiment, the balancing device 10 includes a guide rail 101, which is horizontally mounted on the upper end of the first truss 1. A connecting seat 102 is slidably mounted on the upper end of the guide rail 101. A connecting plate 103 is bolted to the front side of the connecting seat 102, and the bottom of the connecting plate 103 is connected to the connecting frame 3. Thus, when the electric hoist body 4 moves laterally, the sliding effect of the connecting plate 103 connecting the connecting seat 102 and the guide rail 101 can be coordinated to perform lateral movement synchronously. A metal frame 104 is mounted on the top of the connecting seat 102, and the upper end of the metal frame 104 is provided with The drive assembly 105 is connected to the winding assembly 106 on all four sides, and the winding assembly 106 is installed at the four corners of the metal frame 104. The winding assembly 106 has a steel rope 107 wound inside, and the lower end of the steel rope 107 is connected to the claw end of the electric hoist body 4. The metal frame 104 has guide assemblies 109 installed on all four sides, and the guide assemblies 109 are connected to the outside of the steel rope 107. The metal frame 104 has guide assemblies 109 on all four sides, and the guide assemblies 109 are sleeved on the outside of the steel rope 107. Tensioning assemblies 108 are provided inside all four sides of the metal frame 104.

[0050] The drive assembly 105 includes a servo motor 1051, which is mounted on the upper middle part of the metal frame 104. The top output end of the servo motor 1051 is connected to the first bevel gear set 1052. The first bevel gear set 1052 is laterally connected to the middle of the first bevel gear set 1053. The first bevel gear set 1054 is installed on both the left and right sides of the first bevel gear set 1053, so that the two sides of the second bevel gear set 1054 can mesh and transmit at the same time. The second bevel gear set 1054 is longitudinally connected to the middle of the second bevel gear set 1055. The second bevel gear set 1056 is installed on both the front and rear sides of the second bevel gear set 1055, and the lower end of the third bevel gear set 1056 is connected to the winding assembly 106.

[0051] The first bevel gear set 1052, the second bevel gear set 1054 and the third bevel gear set 1056 have the same structure. They are all composed of two meshing bevel gears to achieve a stable rotational meshing transmission effect.

[0052] The winding assembly 106 includes a protective cylinder 1061, which is located at the lower end of the third bevel gear set 1056 and mounted on the four sides of the upper end of the metal frame 104. Each of the four protective cylinders 1061 has a vertically rotatable rotating shaft 1062 inside. The upper end of the rotating shaft 1062 is connected to the third bevel gear set 1056, meaning that when the third bevel gear set 1056 rotates, the rotating shaft 1062 is rotated synchronously. A winding roller 1063 is located on the outer side of the lower end of the rotating shaft 1062, and a steel rope 107 is wound around the outer side of the winding roller 1063. A pulley assembly 1064 is located on the outer side of the upper end of the rotating shaft 1062. The pulley assembly 1064, on the side away from the rotating shaft 1062, is connected to a rotating drum 1065. The rotating drum 1065 rotates... The steel rope 107 is stably wound around inside the protective cylinder 1061, with a gap between the rotating drum 1065 and the take-up roller 1063. A docking ring 1066 is sleeved on the lower end of the rotating drum 1065. A convex shaft 1067 is installed on the left side inside the docking ring 1066 and is inserted into the rotating drum 1065. A docking frame 1068 is installed on the side of the docking ring 1066 near the take-up roller 1063, and a roller 1069 is vertically rotatably installed on the side of the docking frame 1068 away from the docking ring 1066. The steel rope 107 is inserted between the roller 1069 and the docking frame 1068. The rolling and up-and-down movement of the roller 1069 ensures that the steel rope 107 is wound around the outside of the take-up roller 1063 smoothly and evenly.

[0053] Among them, the steel ropes 107 are distributed along the four sides of the metal frame 104, and the four steel ropes 107 are respectively connected to the front and rear sides of the hook end of the electric hoist body 4. That is, the steel ropes 107 on the four sides can form a lateral pulling balance structure to keep the hook end of the electric hoist body 4 balanced, improve the stability of the container hoisting process, and avoid the occurrence of hoisting swaying problems.

[0054] The rotating drum 1065 has a circulating transmission groove on its outside, and the rotating drum 1065 is connected to the convex shaft 1067 on one side of the docking ring 1066 through the groove. That is, the groove on the outside of the rotating drum 1065 is connected to the convex shaft 1067 on the left side of the docking ring 1066 to realize the up and down reciprocating movement of the docking ring 1066.

[0055] Specifically, the steel cables 107 on all four sides of the metal frame 104 are respectively connected to the front and rear sides of the hook end at the bottom of the electric hoist body 4 to form an auxiliary balancing hoisting structure. That is, when the electric hoist body 4 is performing a lowering hoisting operation, the servo motor 1051 located in the middle of the upper end of the metal frame 104 can be operated synchronously, so that the servo motor 1051 can achieve meshing transmission with the first bevel gear set 1052 connected to the top output end. In this way, the first rotating rod 1053 connected to the middle of the first bevel gear set 1052 can achieve simultaneous meshing operation of the second bevel gear set 1054 connected to both sides. As the second bevel gear sets 1054 on both sides operate, the second rotating rod 1055, which is connected to the middle of the second bevel gear sets 1054 on both sides, can be linked to realize the meshing transmission of the third bevel gear set 1056 connected to the front and rear sides. As a result, the rotating shaft 1062, which is connected to the lower end of the third bevel gear set 1056 and rotatably installed inside the protective cylinder 1061, will rotate accordingly. The winding roller 1063 installed outside the rotating shaft 1062 can realize the release of the externally wound steel rope 107, so that the four steel ropes 107 cooperate with the descent movement of the electric hoist body 4 and perform descent movement synchronously.

[0056] When the electric hoist body 4 completes the hoisting activity and begins the upward movement, the four side rotating shafts 1062 can rotate simultaneously to drive the outer end connected winding rollers 1063 to rotate. This allows the four side winding rollers 1063 to work in conjunction with the upward movement of the electric hoist body 4 to simultaneously wind up the four side steel ropes 107, ensuring that the four side steel ropes 107 rise synchronously with the electric hoist body 4. In this way, the four side steel ropes 107 provide auxiliary hoisting balance to the bottom claw end of the electric hoist body 4, reducing the swaying effect of the claw end.

[0057] Secondly, during the forward and reverse rotation of the rotating shaft 1062, the pulley assembly 1064 installed on the upper end of the rotating shaft 1062 can synchronously drive forward and reverse. Consequently, the rotating drum 1065, which is connected to the lower end of the other side of the pulley assembly 1064, can rotate in the same direction. The groove on the outside of the rotating drum 1065 can, through the rotational effect, drive the rising convex shaft 1067 on one side of the inner side of the mating ring 1066, allowing the mating ring 1066 to move along the outside of the rotating drum 1065. During the up-and-down movement of 066, the rising docking frame 1068 and roller 1069 on the other side can pull the steel rope 107 inserted between the docking frame 1068 and roller 1069, causing the winding position of the steel rope 107 to move up and down intermittently. This ensures that the steel rope 107 is wound evenly and flat outside the winding roller 1063, avoiding winding in a single position, which would cause the winding space to be limited and the winding to become entangled. Thus, it can ensure the stability of the simultaneous winding and outward lifting of the steel rope 107 on all four sides.

[0058] Please see Figures 9-10In this embodiment, the tensioning assembly 108 includes a drive motor 1081, which is built into the four sides of the metal frame 104. The top output end of the drive motor 1081 is connected to the screw 1082. The screw 1082 is threadedly connected to a connecting cylinder 1083, thus forming a threaded telescopic structure. The upper end of the connecting cylinder 1083 is rotatably connected to the top block 1084. The top block 1084 is built into the guide frame 1085, and the lower middle part of the guide frame 1085 is vertically limited and connected to the connecting cylinder 1083. Furthermore, the guide frame 1085 is built into the four sides of the metal frame 104. Thus, when the screw 1082 and the connecting cylinder 1083 are threadedly telescopic, the connecting cylinder 1083 can push the top block 1084 vertically upwards, satisfying the up-and-down movement. The left and right sides of the top block 1084 extend out of the left and right sides of the guide frame 1085, and the protruding ends of the top block 1084 are rotatably mounted with first connecting arms 1. 086, the upper ends of the first connecting arms 1086 on both sides are rotatably connected to the second connecting arms 1087. The middle part of the second connecting arms 1087 is rotatably connected to the upper end of the fixing frame 1088, and the end of the second connecting arms 1087 away from the first connecting arms 1086 is rotatably connected to the third connecting arm 1089. The lower end of the fixing frame 1088 is fixed to the left and right sides of the upper end of the guide frame 1085. The end of the third connecting arm 1089 away from the second connecting arm 1087 is connected to the connecting shell 10810. The upper end is rotatably connected, and the connecting shell 10810 is limited and slidably mounted inside the upper side of the guide frame 1085. The lower end of the connecting shell 10810 is vertically inserted with three insertion shafts 10811, and the bottom of each of the three insertion shafts 10811 is connected to the pressure plate 10812. The connecting shell 10810 is equipped with three springs 10813, and the bottom of each of the three springs 10813 is connected to the top of each of the three insertion shafts 10811. In this way, the compression state is achieved.

[0059] Among them, the top block 1084, the connecting shell 10810 and the pressure plate 10812 are respectively limited and built into the lower and upper ends of the guide frame 1085, and there is a gap between the pressure plate 10812 and the top block 1084. That is, the gap between the pressure plate 10812 and the top block 1084 allows the steel rope 107 to pass through, so as to meet the lifting and clamping of the steel rope 107, so that the steel rope 107 has a tension and balance effect during the hoisting process, and makes the hoisting state of the electric hoist body 4 stable.

[0060] Specifically, during the hoisting and balancing of the electric hoist body 4 using the steel cable 107, to ensure the steel cable 107 remains taut and balanced, the drive motor 1081 can be operated to rotate the upper screw 1082. As the screw 1082 rotates, the threaded connecting cylinder 1083 moves vertically upwards along the lower center of the guide frame 1085, thereby pushing the rising top block 1084 inside the guide frame 1085. This allows the top block 1084 to lift the steel cable 107, keeping it taut and balancing. As the top block 1084 moves upwards along the inside of the guide frame 1085, the first connecting arms 1086 on its left and right sides simultaneously push the top-connected second connecting arms 1087 upwards. Both second connecting arms 1087 can cooperate with the middle-connected fixing frame 1088 to rotate and push down the other end-connected third connecting arm 1087. 89. In this way, in conjunction with the downward pushing effect of the third connecting arms 1089 on both sides, the bottom connecting shell 10810 can be pushed down. Then, through the plug shaft 10811 installed on the pressure plate 10812 at the lower end of the connecting shell 10810, it can move closer to the top block 1084. In addition, in conjunction with the downward pushing effect of the connecting shell 10810, the pressure plate 10812 can abut against the outside of the steel rope 107, and the plug shaft 10811 can move into the inside of the connecting shell 10810 to compress the spring 10813 provided inside the connecting shell 10810. In this way, through the upward lifting of the top block 1084 and the compression effect of the pressure plate 10812, the steel rope 107 can meet the requirements of flexible adjustment of hoisting tension and compression stability. This not only enhances the balance effect of the steel rope on the electric hoist, but also reduces the hoisting sway of the steel rope, making it less likely for the position of the steel rope 107 to shift and affect the balance effect.

[0061] Please see Figure 11 In this embodiment, the guide assembly 109 includes a guide cylinder 1091, which is inserted into the interior of the four sides of the metal frame 104. The guide cylinder 1091 has connecting shafts 1092 on both the left and right sides of the middle part, and the guide cylinder 1091 is rotatably connected to the interior of the four sides of the metal frame 104 through the connecting shafts 1092 on the left and right sides. A swing frame 1093 is installed on the outside of the connecting shafts 1092 on both sides, and a rubber wheel 1094 is rotatably installed at the lower end of the swing frame 1093 on both sides. A pressure strip 1095 is abutted at the bottom of the rubber wheel 1094. Guide rods 1096 are inserted into both sides of the bottom of the pressure strip 1095, and the upper and lower ends of the guide rods 1096 are connected to the interior of the metal frame 104. A buffer spring 1097 is installed at the lower end of the guide rod 1096, and the top of the buffer spring 1097 abuts against the pressure strip 1095.

[0062] The swing frame 1093 is arranged in an inverted V-shape, and the rubber wheels 1094 installed on both sides of the bottom of the swing frame 1093 abut against the upper end of the pressure strip 1095 to ensure that the rubber wheels 1094 can achieve the squeezing and buffering effect of the pressure strip 1095 when the swing frame 1093 rotates in both directions.

[0063] Specifically, when the steel rope 107 is connected to the front and rear sides of the hook end at the bottom of the electric hoist body 4, the steel rope 107 can be inserted into the guide cylinder 1091. This, combined with the guidance of the guide cylinder 1091, ensures stable operation and further reduces deviation and swaying. Simultaneously, the guide cylinder 1091 can be rotatably connected to the four sides of the metal frame 104 via connecting shafts 1092 on both sides. That is, when the steel rope 107 is pulled during installation, it can rotate to guide the hoisting direction. When the guide cylinder 1091 rotates, the swing frame 1 installed on the outside of the connecting shaft 1092... 093 can rotate synchronously, and the pressure bar 1095 is squeezed by a rubber wheel 1094 set on both sides of the bottom. In this way, the pressure bar 1095 can move downward in coordination with the guide rods 1096 on both sides. During the downward movement, the buffer springs 1097 set at the bottom of the guide rods 1096 on both sides are squeezed and transmitted. In this way, the guide cylinder 1091 can have a certain guiding and buffering effect to reduce the swaying problem of the steel rope 107 during hoisting and use, and enhance the hoisting balance effect of the four steel ropes 107 on the electric hoist body 4.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. An electric single-girder crane, comprising a first truss (1), with a second truss (2) installed at the lower ends of both the left and right sides of the first truss (1), a connecting frame (3) provided at the lower middle part of the first truss (1), an electric hoist body (4) installed at the bottom of the connecting frame (3), an electric control box (5) provided at the left front end of the connecting frame (3), a first motor (6) provided opposite to the right side of the electric control box (5), a roller (7) connected to the output end of the first motor (6), the roller (7) connected to the lower ends of the front and rear sides of the first truss (1), a second motor (8) installed on one side of the rear end of the second truss (2), the output end of the second motor (8) connected to a guide wheel (9), and the guide wheel (9) connected to an external rail; Its features are: It also includes a balancing device (10) located at the upper end of the first truss (1). The balancing device (10) includes a guide rail (101), which is horizontally installed at the upper end of the first truss (1). A connecting seat (102) is slidably mounted on the upper end of the guide rail (101). A connecting plate (103) is bolted to the front side of the connecting seat (102), and the bottom of the connecting plate (103) is connected to the connecting frame (3). A metal frame (104) is installed on the top of the connecting seat (102). A driving assembly (105) is provided at the upper end of the metal frame (104). The driving assembly (105) is connected to the winding assembly (106) on all four sides, and the winding assembly (106) is installed on the metal frame (104). 4) At the four corners, a steel rope (107) is wound inside the winding assembly (106), and the lower end of the steel rope (107) is connected to the hook end of the electric hoist body (4). Guide assemblies (109) are installed on the four sides of the metal frame (104), and the guide assemblies (109) are connected to the outside of the steel rope (107). The guide assemblies (109) are provided on the four sides of the metal frame (104), and the guide assemblies (109) are sleeved on the outside of the steel rope (107). Tensioning assemblies (108) are provided inside the four sides of the metal frame (104). The tensioning assemblies (108) include a drive motor (1081). The drive motor (1081) is located inside the four sides of the metal frame (104). The top output end of the machine (1081) is connected to the screw (1082). The screw (1082) is externally threaded to a connecting cylinder (1083). The upper end of the connecting cylinder (1083) is rotatably connected to the top block (1084). The top block (1084) is built into the guide frame (1085), and the lower middle part of the guide frame (1085) is vertically limited and connected to the connecting cylinder (1083). First connecting arms (1086) are rotatably installed on both sides of the top block (1084). The upper ends of the first connecting arms (1086) on both sides are connected to second connecting arms (1087). The middle part of the second connecting arms (1087) is connected to the fixed frame (1088), and the second connecting arms (1087) are far from the fixed frame (1088). One end of the first connecting arm (1086) is connected to the third connecting arm (1089). The lower end of the fixing frame (1088) is fixed to the guide frame (1085). The end of the third connecting arm (1089) away from the second connecting arm (1087) is rotatably connected to the connecting shell (10810). The connecting shell (10810) is installed on the upper side inside the guide frame (1085). A plug shaft (10811) is inserted into the lower end of the connecting shell (10810). A pressure plate (10812) is installed at the bottom of the plug shaft (10811). A spring (10813) is installed inside the connecting shell (10810), and the bottom of the spring (10813) is connected to the top of the plug shaft (10811).

2. The electric single-girder crane according to claim 1, characterized in that: The drive assembly (105) includes a servo motor (1051), which is mounted on the upper middle part of the metal frame (104). The top output end of the servo motor (1051) is connected to the first bevel gear set (1052). The first bevel gear set (1052) is laterally connected to the middle part of the first rotating rod (1053). The first rotating rod (1053) is mounted on both the left and right sides of the first rotating rod (1053). The second bevel gear set (1054) is longitudinally connected to the middle part of the second bevel gear set (1054). The second rotating rod (1055) is mounted on both the front and rear sides of the second rotating rod (1055). The lower end of the third bevel gear set (1056) is connected to the winding assembly (106).

3. The electric single-girder crane according to claim 2, characterized in that: The winding assembly (106) includes a protective cylinder (1061) located at the lower end of the third bevel gear set (1056). A rotating shaft (1062) is rotatably mounted inside the protective cylinder (1061). The upper end of the rotating shaft (1062) is connected to the third bevel gear set (1056), and a winding roller (1063) is provided on the outer side of the lower end of the rotating shaft (1062). A steel rope (107) is wound around the outer side of the winding roller (1063). A pulley assembly (1064) is provided on the outer side of the upper end of the rotating shaft (1062). The pulley assembly (1064) is located away from the rotating shaft (1062) on the side opposite to it. A rotating drum (1065) is connected to the protective cylinder (1061). The rotating drum (1065) is rotatably installed inside the protective cylinder (1061). A docking ring (1066) is sleeved on the outside of the rotating drum (1065). A convex shaft (1067) is provided on one side of the docking ring (1066), and the convex shaft (1067) is inserted into the rotating drum (1065). A docking frame (1068) is installed on one side of the docking ring (1066), and a roller (1069) is rotatably installed on the side of the docking frame (1068) away from the docking ring (1066). A steel rope (107) is inserted between the roller (1069) and the docking frame (1068).

4. The electric single-girder crane according to claim 1, characterized in that: The guide assembly (109) includes a guide tube (1091), which is inserted into the interior of the four sides of the metal frame (104). The guide tube (1091) is provided with connecting shafts (1092) on both sides of the middle part, and the guide tube (1091) is rotatably connected to the interior of the metal frame (104) through the connecting shafts (1092) on both sides. A swing frame (1093) is installed on the outside of the connecting shaft (1092). A rubber wheel (1094) is rotatably installed at the lower end of the swing frame (1093). A pressure strip (1095) is abutted against the bottom of the rubber wheel (1094). Guide rods (1096) are inserted into both sides of the pressure strip (1095), and the upper and lower ends of the guide rods (1096) are connected to the interior of the metal frame (104). A buffer spring (1097) is installed at the lower end of the guide rod (1096), and the top of the buffer spring (1097) abuts against the pressure strip (1095).

5. The electric single-girder crane according to claim 1, characterized in that: The steel rope (107) is distributed along the four sides of the metal frame (104), and the steel rope (107) on the four sides is connected to the front and rear sides of the hook claw end of the electric hoist body (4) respectively.

6. An electric single-girder crane according to claim 3, characterized in that: The rotating drum (1065) has a circulating transmission groove on its outside, and the rotating drum (1065) is connected to the convex shaft (1067) on one side of the docking ring (1066) through the groove.

7. The electric single-girder crane according to claim 1, characterized in that: The top block (1084), connecting shell (10810) and pressure plate (10812) are respectively limited and built into the lower and upper ends of the guide frame (1085), and there is a gap between the pressure plate (10812) and the top block (1084).

8. An electric single-girder crane according to claim 4, characterized in that: The swing frame (1093) is arranged in an inverted V-shape, and the rubber wheels (1094) installed on both sides of the bottom of the swing frame (1093) abut against the upper end of the pressure strip (1095).

9. A remote control system for an electric single-girder crane, as described in any one of claims 1-8, characterized in that: It includes a PLC control unit, a wireless module, a remote monitoring terminal, a multi-angle camera and a power drive component located inside the electrical control box (5). The PLC control unit is connected to the control terminal via the wireless module. The wireless module, the remote monitoring terminal, the multi-angle camera and the power drive component are all connected to the PLC control unit. The PLC control unit is responsible for automated logic operations, collecting crane operation data, and issuing execution instructions. The wireless module is used for wireless network connection between the PLC control unit and the control terminal, and for real-time data transmission synchronization; The remote monitoring terminal is used to receive and execute remote control commands and to detect real-time data of current, voltage, speed, and position. The multi-angle camera is used to capture images of the crane hook, load and surrounding environment in real time, and transmits the images to the control terminal synchronously in combination with wireless video technology. The power drive component is used for crane hoisting operation and position adjustment.

Images