A bridge crane sling visualization device

Abstract

The present invention discloses a bridge crane sling visualization device, comprising a monitoring terminal installed on the sling, a control transmission module and an actuator for controlling the movement of the monitoring terminal, a side wall of the sling is provided with an installation chamber recessed toward the interior of the sling, the actuator comprises a telescopic component located in the installation chamber, the monitoring terminal is installed at one end of the telescopic component, the installation chamber is provided with a driving mechanism for driving the telescopic component to extend and retract, the installation chamber is also provided with an angle adjustment mechanism for changing the deflection angle of the monitoring terminal, at this time the monitoring range of the monitoring terminal changes, and can then penetrate into the environment at the bottom of the grabbing container, to prevent the container from hitting staff or other objects during the placement of the container; when placing the container in a narrow space, in order to prevent the monitoring terminal outside the sling from touching the inner walls of other containers or the cabin, the monitoring terminal is stored in the installation chamber to strengthen the protection of the monitoring terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge cranes, and in particular to a bridge crane hoist visualization device. Background Art

[0002] A gantry crane is a crane used for loading and unloading operations at a dock. It is the heart of the dock. The operating capacity of the gantry crane determines the cargo handling capacity of a dock.

[0003] During operation, a gantry crane needs to extend several dozen meters out to the sea surface, using a spreader to transfer containers from a ship to land, or to load containers from land onto a ship. During operation, an operator, located in an operating room, controls the position of the spreader and then uses it to grab the container. The distance between the operator and the container on the ground is considerable, making it difficult to observe the container's gripping status or to ensure that the surrounding environment is suitable for its movement.

[0004] In order to facilitate operators to observe the container grabbing status, the hook of the spreader is remotely monitored, such as Figure 1 As shown, a monitor 101 is installed on the outside of the spreader 1, and then the monitor 101 is used to monitor the grabbing situation of the hook 11 on the container 10, and then the image is transmitted to the display screen in the operation room, so that the operator can judge the grabbing situation of the container.

[0005] The existing monitor 101 is fixedly installed on the side wall of the spreader. At this time, the monitor 101 can monitor the working environment of the spreader directly below and the condition of the hook 11 when the container 10 is not grabbed. When the hook 11 gradually moves down and is inserted into the lifting hole of the container 10, the angle of the monitor 101 is not convenient to rotate, and the range of the monitor is limited by the installation, resulting in the monitoring process of the hook 11 being inserted into the lifting hole of the container 10 being relatively vague, or the monitoring image cannot be seen.

[0006] Therefore, how to design a device that can adjust the position of the bridge crane hoist monitoring equipment has become a technical problem that needs to be solved urgently by people in this field. Summary of the Invention

[0007] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a bridge crane sling visualization device to solve the problems that the position of the bridge crane sling monitoring device cannot be changed and the monitoring range is small.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A bridge crane sling visualization device includes a monitoring terminal installed on the sling, a control transmission module and an actuator for controlling the movement of the monitoring terminal, a side wall of the sling is provided with an installation chamber recessed toward the interior of the sling, the actuator includes a telescopic component located in the installation chamber, the monitoring terminal is installed at one end of the telescopic component, the installation chamber is provided with a driving mechanism for driving the telescopic component to extend and retract, the installation chamber is also provided with an angle adjustment mechanism for changing the deflection angle of the monitoring terminal, in an initial state, the monitoring terminal is located on the outside of the sling and the monitoring angle of view is vertically downward, when the container is lifted, the telescopic component drives the monitoring terminal to extend to the side away from the sling, the monitoring angle of the monitoring terminal is tilted toward the hook at the bottom of the sling and covers the hook, and when the monitoring terminal is in a protective state, the telescopic component drives the monitoring terminal to be retracted into the installation chamber.

[0010] Furthermore, the monitoring terminal is rotatably mounted on the end of the telescopic assembly, and the angle adjustment mechanism includes a pulley, a pull rope and a second torsion spring. The pulley is rotatably mounted on the side wall of the installation chamber, one end of the pull rope is wrapped around the outer wall of the pulley, and the other end thereof is fixed to the monitoring terminal, one end of the second torsion spring is fixedly connected to the side wall of the pulley, and the other end thereof is fixedly connected to the inner wall of the installation chamber.

[0011] Furthermore, a first torsion spring is installed between the monitoring terminal and the end of the telescopic assembly, one end of the first torsion spring is fixed to the end of the telescopic assembly, and the other end thereof is fixed to the outer wall of the monitoring terminal.

[0012] Furthermore, the telescopic assembly includes a support seat, a screw rod, a slider, an extension plate and a limit assembly for limiting the flipping of the slider. The support seat is fixedly installed on the inner wall of the installation chamber, the screw rod is rotatably installed on the support seat, the slider is threadedly connected to the screw rod, the extension plate is fixedly installed on the slider, and the monitoring terminal is rotatably installed on the extension plate.

[0013] Furthermore, the limiting assembly includes a limiting block fixed to the inner wall of the installation chamber, a limiting slot is provided on the limiting block, the slider is inserted into the limiting slot and the side wall of the slider abuts against the side wall of the limiting slot.

[0014] Furthermore, the driving mechanism includes a first driving mechanism, which is a motor, and the output shaft of the motor is fixedly connected to the screw rod.

[0015] Furthermore, the motor is a DC brush reduction motor.

[0016] Furthermore, the driving mechanism also includes a second driving mechanism, which includes a gear and a rack, an unlocking device for releasing the engagement between the gear and the rack, and a resetting mechanism for resetting the rack. The gear is fixedly mounted on the screw rod. In the initial state, the rack is engaged with the gear and the lower end of the rack extends downward from the sling. When monitoring the terminal protection status, the rack is disengaged from the gear.

[0017] Furthermore, the reset mechanism includes a protective cover, a push plate, and an elastic member. The protective cover is fixedly mounted on the sling, the push plate is slidably connected to the inner wall of the protective cover, the top of the rack abuts against the bottom of the push plate, one end of the elastic member is mounted on the push plate, and the other end is mounted on the inner wall of the protective cover.

[0018] Furthermore, the unlocking device includes a cylinder fixed on the sling, and the rack is slidably connected to the cylinder rod of the cylinder along the length direction of the rack.

[0019] Compared with the existing technology, the present invention has the following advantages: the monitoring terminal is installed on the spreader, the central control unit receives and processes the data from the monitoring terminal, and sends the data to the display screen through the wireless transmission unit, thereby detecting the status of the spreader;

[0020] In the initial state, the monitoring terminal's monitoring angle of view is vertically downward, which makes it easy to observe the environment below the spreader, prevent the spreader from colliding with the container during the falling process, and improve safety performance;

[0021] When grabbing a container, the telescopic assembly drives the monitoring terminal to move away from the spreader. The angle adjustment mechanism is then used to adjust the monitoring terminal's angle so that the monitoring viewpoint faces the hook on the spreader. This allows the operator to observe whether the hook is accurately inserted into the container's lifting hole, thereby improving container grabbing efficiency.

[0022] When the monitoring terminal's monitoring angle of view tilts toward the container, the terminal's monitoring range changes, allowing it to reach the bottom of the container, preventing it from hitting workers or other objects during placement.

[0023] When placing a container in a narrow space, in order to prevent the monitoring terminal on the outside of the spreader from touching other containers or the inner wall of the cabin, the monitoring terminal is stored in the installation room to strengthen the protection of the monitoring terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the prior art;

[0025] Figure 2It is a structural schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0027] Figure 4 An exploded view of the camera and positioning seat of the present invention;

[0028] Figure 5 The exploded diagram of the gear rack;

[0029] Figure 6 It is a structural schematic diagram of the initial state of the present invention;

[0030] Figure 7 This is a schematic structural diagram of the first state of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the second state of Benfenming;

[0032] Figure 9 for Figure 6 Cross-sectional view of AA;

[0033] Figure 10 for Figure 8 Cross-sectional view of the middle BB;

[0034] Figure 11 This is the control system of the present invention.

[0035] In the figure: 1. Spreader; 10. Container; 101. Monitor; 11. Hook; 12. Installation chamber; 13. Through slot; 2. Protective cover; 21. Push plate; 22. Spring; 3. Push plate; 31. Slide slot; 32. Rack; 33. Gear; 34. Screw; 35. Slider; 36. Extension plate; 4. Cylinder; 41. Slide plate; 5. Motor; 6. Camera; 61. Mounting seat; 62. First rotating shaft; 63. First torsion spring; 7. Limit block; 71. Limit slot; 8. Base; 81. Pulley; 82. Pull rope; 83. Second torsion spring; 84. Second rotating shaft; 9. Support seat. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0037] This embodiment provides a bridge crane hoist visualization device, which is mainly used to observe the surrounding environment of the container during the process of the bridge crane lifting the container, thereby improving the efficiency of container lifting and the safety during the lifting process.

[0038] The visualization equipment of the bridge crane includes a monitoring terminal, a control transmission module, and an actuator that controls the movement of the monitoring terminal, such as Figure 11 As shown, in this embodiment, the monitoring terminal is a camera 6, wherein the control transmission module includes a control unit, a power supply, a display screen and a wireless transmission unit for signal transmission. The camera 6 is electrically connected to the control unit and mainly transmits the image information monitored by the camera 6 to the control unit for information processing. The display screen is installed in the operator's control room of the bridge crane. The power supply is used to power the control transmission module, the actuator and the camera 6. The wireless transmission unit is used to send the image information of the camera 6 to the display screen, and at the same time it can receive the operation information of the operator on the display screen. At this time, the control unit processes the received operation information and then sends it to the actuator for operation.

[0039] In the prior art, hooks 11 for grabbing containers 10 are installed at the bottom of the four corners of the spreader 1. Figure 1 As shown, a monitor 101 is fixedly mounted on the side wall of the spreader 1. The monitoring range of the monitor 101 cannot be adjusted, resulting in a limited monitoring range of the monitor 101. Figure 1 The monitoring angle of the monitor 101 in the embodiment mainly extends downward, and the state of the hook 11 is monitored by the side view. When grabbing the container 10, the hook 11 is gradually inserted into the lifting hole of the container 10. At this time, the distance between the monitor 101 and the container 10 gradually decreases. When the monitoring angle of the monitor 101 cannot be changed, the monitoring image of the hook 11 inserted into the lifting hole of the container is blurred, and the state of the hook 11 grabbing the container 10 cannot be carefully observed.

[0040] When the container 10 is grabbed by the hook 11, since the height of the container 10 is generally between two and three meters, the monitoring angle of the monitor 101 is vertically downward, and the environment at the bottom of the container 10 cannot be observed. When there is an obstacle at the bottom of the falling container, the container may easily tilt due to the inability to observe the obstacle.

[0041] When the bridge crane is in operation, it is often necessary to extend the spreader 1 to the sea surface to load and unload containers on the ship. Since the loading compartment of the ship is limited, when grabbing the container, there will be other containers placed on the side of the spreader. At this time, the monitor 101 located on the outside of the spreader 1 is prone to collision with the other containers, causing damage to the monitor 101.

[0042] In response to the above-mentioned problems, this embodiment provides specific solutions.

[0043] In this embodiment, if Figure 2As shown, one side wall of the spreader 1 is provided with an inwardly recessed installation chamber 12, wherein the actuator is installed inside the installation chamber 12, and the actuator includes a telescopic component and a driving mechanism for driving the telescopic component to extend and retract, wherein a camera 6 is installed at the end of the telescopic component, and the camera 6 is used to observe the surrounding environment of the spreader 1; at the same time, the position of the camera 6 can be adjusted through the telescopic component to adjust the monitoring range of the camera 6. When the hook 11 is grabbing the container 10, the camera 6 can be stored in the installation chamber 12 to protect the camera 6.

[0044] In the initial state, if Figure 2 As shown, the camera 6 is located outside the spreader 1, and the monitoring angle of the camera 6 is vertically downward, which is convenient for observing the working environment under the spreader 1. When the hook 11 on the spreader 1 grabs the container 10, as shown in FIG. Figure 7 As shown, at this time, the camera 6 extends outward, changing the monitoring range of the camera 6.

[0045] In order to enable the camera 6 to clearly observe the internal process of the hook 11 being inserted into the lifting hole of the container 10, the angle of the camera 6 needs to be adjusted; therefore, in this embodiment, Figure 4 and Figure 7 As shown, an angle adjustment mechanism for adjusting the angle of the camera 6 is installed inside the installation chamber 12, and the angle adjustment mechanism includes a pulley 81, a pull rope 82 and a second torsion spring 83. The pulley 81 is rotatably installed on the inner wall of the installation chamber 12, one end of the pull rope 82 is fixed on the outer wall of the pulley 81 and wound around the pulley 81, and the other end is fixed on the camera 6; wherein, the second torsion spring 83 is installed between the pulley 81 and the inner wall of the installation chamber 12 so that the pulley 81 can rotate and wind the pull rope 82. In the initial state, the second torsion spring 83 is in a free state.

[0046] Through the above-mentioned arrangement, when the telescopic assembly extends the camera 6 to the side away from the sling 1, the pull rope 82 is dragged outward, thereby driving the pulley 81 to rotate and causing the second torsion spring 83 to twist. At this time, the pull rope 82 applies a pulling force to the camera 6, causing the camera 6 to flip toward the side of the hook 11, thereby changing the monitoring range of the camera 6, so that the hook 11 is completely within the monitoring range, and the process of the hook 11 grabbing the container 10 can be clearly observed.

[0047] During the above process, after adjusting the angle of the camera 6, the observation ray of the camera 6 can now illuminate the bottom of the container 10, such as Figure 7 As shown, at this time, the working environment at the bottom of the container 10 can be observed, and obstacles or several corners of the lower container can be observed in advance, which facilitates the safe placement of the container.

[0048] In this embodiment, in order to install the rope pulley 81, as shown in FIG. Figure 4 and Figure 6 As shown, the bottom wall of the installation chamber 12 is fixedly mounted with a base 8, and the pulley 81 is rotatably mounted on the side wall of the base 8, wherein the second torsion spring 83 is installed between the pulley 81 and the base 8, and one end of the second torsion spring 83 is fixedly connected to the side wall of the base 8, and the other end thereof is fixedly connected to the side wall of the pulley 81.

[0049] In order to realize the extension and retraction of the camera 6, in this embodiment, as shown in FIG. Figure 6 and Figure 7 As shown, the telescopic assembly includes two support seats 9 fixedly mounted on the bottom wall of the installation chamber 12, a screw rod 34 is rotatably mounted between the two support seats 9, a slider 35 is threadedly connected to the screw rod 34, and an extension plate 36 fixed by bolts is mounted on the slider 35. The bottom wall of the installation chamber 12 is fixedly mounted with a limit assembly that limits the slider 35 from flipping, wherein, as shown in FIG. Figure 6 As shown, the limiting assembly includes a limiting block 7 fixed to the bottom wall of the installation chamber 12, and the limiting block 7 is provided with a limiting groove 71 arranged along the length direction of the screw rod 34, wherein one end of the slider 35 is inserted into the limiting groove 71, and the side walls of the slider 35 are against the side walls of the limiting groove 71, thereby limiting the flipping of the slider 35 during the movement process.

[0050] Through the above setting, when the screw rod 34 rotates, the slider 35 stops flipping under the action of the limit groove 71. Since the slider 35 is threadedly connected to the screw rod 34, at this time, the slider 35 moves along the length direction of the screw rod 34, and then can drive the camera 6 to move through the extension plate 36.

[0051] In order to realize the installation of the camera 6, in this embodiment, as shown in FIG. Figure 4 As shown, a mounting base 61 is provided on the top of the camera 6, and the mounting base 61 is rotatably connected to the extension plate 36 via a first rotating shaft 62. Figure 7 The status in the switch to Figure 6 In the state, a torsional torque is required to reset the camera 6. In this embodiment, a first torsion spring 63 is sleeved on the first rotating shaft 62, one end of the first torsion spring 63 is fixed to the mounting seat 61, and the other end thereof is fixed to the side wall of the extension plate 36.

[0052] Through the above-mentioned arrangement, in the initial state, the first torsion spring 63 and the second torsion spring 83 are both in a free state. When the extension plate 36 pushes the camera 6 outward, the length of the pull rope 82 gradually becomes longer, and the pulley 81 drives the second torsion spring 83 to twist. During this process, the torsional torque of the second torsion spring 83 gradually increases. When the torque exceeds the initial torsional force of the first torsion spring 63, it drives the camera 6 to rotate around the first rotating shaft 62. The first torsion spring 63 twists and accumulates force, thereby changing the monitoring range of the camera 6 and making the monitoring angle of the camera 6 cover the hook 11.

[0053] When the container 10 is grabbed by the hook 11, in order to push the camera 6 away from the spreader 1, in this embodiment, Figure 6 and Figure 7 As shown, the driving mechanism includes a power source for driving the screw rod 34 to rotate, wherein the driving mechanism includes a gear 33 fixedly mounted on the screw rod 34 and a rack 32 meshing with the gear 33. In order to realize the rotation of the screw rod 34, in this embodiment, in the initial state, as shown in FIG. Figure 6 and Figure 9 As shown, one end of the rack 32 extends downward from the sling 1. When the hook 11 of the sling 1 grabs the container 10, the container 10 pushes the rack 32 to move upward, thereby driving the gear 33 to rotate, and then driving the camera 6 to extend outward.

[0054] In order to extend the rack 32 out of the sling 1, in this embodiment, as shown in FIG. Figure 9 As shown, a through slot 13 penetrating the mounting chamber 12 is provided between the bottom wall and the top wall of the sling 1 , the rack 32 extends downward through the through slot 13 , and the side walls of the rack 32 are slidably connected to the side walls of the through slot 13 .

[0055] When the container 10 is unloaded from the sling 1, in order to be able to reset the rack 32, in this embodiment, a protective cover 2 is fixedly installed on the top of the sling 1, and the inner wall of the protective cover 2 is provided with a push plate 21 that slides up and down, and a spring 22 is provided between the top of the push plate 21 and the top wall of the protective cover 2, wherein the top end of the rack 32 is against the push plate 21.

[0056] Through the above arrangement, when the rack 32 moves upward, the rack 32 pushes the push plate 21 upward and compresses the spring 22. When the container is unloaded, the elastic force of the spring 22 pushes the rack 32 to move downward and reset, and then the screw rod 34 can be driven to rotate in the opposite direction through the gear 33, thereby retracting the camera 6.

[0057] In order to prevent the camera 6 from being touched and damaged when the sling 1 lifts the container 10 and moves within a narrow range, the camera 6 needs to be stored. At this time, the container is still in the grasping state. In order to retract the camera 6, another power source needs to be provided to the telescopic assembly, and the meshing relationship between the gear 33 and the rack 32 needs to be released.

[0058] To this end, in this embodiment, Figure 10 As shown, a cylinder 41 is fixedly connected to the outside of the sling 1, wherein the cylinder rod of the cylinder 41 is connected to the rack 32, releasing the meshing state of the rack 32 and the gear 33. At the same time, the through groove 13 is also provided with a distance for the rack 32 to slide away from the gear 33, so that a gap is formed between the gear 33 and the rack 32. Another power source is the motor 5, wherein the output end of the motor 5 is fixedly connected to the screw rod 34.

[0059] With the above arrangement, when the camera 6 needs to be protected during the lifting process of the container 10, the cylinder rod of the cylinder 4 is retracted, and the electric rack 32 is disengaged from the gear 33. At this time, the motor 5 drives the screw rod 34 to rotate, and then the camera 6 can be retracted into the installation room 12 through the extension plate 36. At this time, the state of the camera 6 is as follows: Figure 8 shown.

[0060] In order to ensure that the monitoring range of the camera 6 located inside the installation room 12 is irradiated to the outside of the spreader 1, in the initial state, Figure 6 As shown, the bottom end of the camera 6 is lower than the bottom wall of the installation chamber 12. When the camera 6 begins to retract into the installation chamber 12, the outer wall of the camera 6 first abuts against the end of the sling 1. The camera 6 flips around the first rotating shaft 62 and drives the first torsion spring 63 to rotate. The monitoring angle of the camera 6 can be adjusted to facilitate observation of the working environment on the side of the sling 1.

[0061] Since the rack 32 needs to be connected to the cylinder rod of the cylinder 4 in a sliding manner along the length of the rack 32, an optimization is made here, such as Figure 5 As shown, a push plate 31 is fixed to the back side of the rack 32 by bolts, and the top of the push plate 31 is against the push plate 21. The side wall of the push plate 31 is provided with a slide groove 31 arranged along the length direction of the rack, and a slide plate 41 is slidably connected inside the slide groove 31, wherein the slide plate 41 is fixedly connected to the cylinder rod of the cylinder 4.

[0062] In this embodiment, the motor 5 adopts a DC brush reduction motor, specifically model Z2D10-24GN-18S. This type of motor can rotate forward and reverse, and does not require the output shaft of the motor to be self-locked. Therefore, when the rack 32 is engaged with the gear 33, the movement of the rack 32 drives the forward or reverse rotation of the screw rod 34 without affecting the motor 5.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A bridge crane spreader visualization device, comprising a monitoring terminal mounted on the spreader (1), a control transmission module, and an actuator for controlling the movement of the monitoring terminal, characterized in that: The side wall of the sling (1) is provided with an installation chamber (12) recessed into the interior of the sling (1); the actuator includes a telescopic component located in the installation chamber (12); the monitoring terminal is installed at one end of the telescopic component; a driving mechanism for driving the telescopic component to extend and retract is provided in the installation chamber (12); an angle adjustment mechanism for changing the deflection angle of the monitoring terminal is also provided in the installation chamber (12); in an initial state, the monitoring terminal is located outside the sling (1) and the monitoring angle of view is vertically downward; when the container is lifted, the telescopic component drives the monitoring terminal to extend away from the sling (1); the monitoring angle of the monitoring terminal is tilted toward the hook (11) at the bottom of the sling (1) and covers the hook (11); when the monitoring terminal is in a protective state, the telescopic component drives the monitoring terminal to retract into the installation chamber (12); The monitoring terminal is rotatably mounted on the end of the telescopic assembly, and the angle adjustment mechanism includes a rope wheel (81), a pull rope (82) and a second torsion spring (83); the rope wheel (81) is rotatably mounted on the side wall of the installation chamber (12); one end of the pull rope (82) is wound around the outer wall of the rope wheel (81), and the other end thereof is fixed to the monitoring terminal; one end of the second torsion spring (83) is fixedly connected to the side wall of the rope wheel (81), and the other end thereof is fixedly connected to the inner wall of the installation chamber (12); The telescopic assembly comprises a support seat (9), a screw rod (34), a slider (35), an extension plate (36), and a limit assembly for limiting the flipping of the slider (35); the support seat (9) is fixedly mounted on the inner wall of the installation chamber (12); the screw rod (34) is rotatably mounted on the support seat (9); the slider (35) is threadedly connected to the screw rod (34); the extension plate (36) is fixedly mounted on the slider (35); and the monitoring terminal is rotatably mounted on the extension plate (36).

2. The bridge crane sling visualization device according to claim 1, characterized in that: A first torsion spring (63) is installed between the monitoring terminal and the end of the telescopic assembly, one end of the first torsion spring (63) is fixed to the end of the telescopic assembly, and the other end is fixed to the outer wall of the monitoring terminal.

3. The bridge crane sling visualization device according to claim 1, characterized in that: The limiting assembly comprises a limiting block (7) fixed to the inner wall of the installation chamber (12), a limiting groove (71) being provided on the limiting block (7), the slider (35) being inserted into the limiting groove (71) and the side wall of the slider (35) being in contact with the side wall of the limiting groove (71).

4. The bridge crane sling visualization device according to claim 1, characterized in that: The driving mechanism comprises a first driving mechanism, the first driving mechanism being a motor (5), and the output shaft of the motor (5) being fixedly connected to the screw rod (34).

5. The bridge crane sling visualization device according to claim 4, characterized in that: The motor (5) is a DC brushed reduction motor.

6. A bridge crane sling visualization device according to claim 1 or 4, characterized in that: The driving mechanism also includes a second driving mechanism, which includes a gear (33), a rack (32), an unlocking device for releasing the engagement between the gear (33) and the rack (32), and a reset mechanism for resetting the rack (32). The gear (33) is fixedly mounted on the screw rod (34). In an initial state, the rack (32) is engaged with the gear (33) and the lower end of the rack (32) extends downward from the sling (1). When the terminal protection state is monitored, the rack (32) is disengaged from the gear (33).

7. The bridge crane sling visualization device according to claim 6, characterized in that: The reset mechanism includes a protective cover (2), a push plate (21), and an elastic member. The protective cover (2) is fixedly mounted on the sling (1). The push plate (21) is slidably connected to the inner wall of the protective cover (2). The top end of the rack (32) abuts against the bottom of the push plate (21). One end of the elastic member is mounted on the push plate (21), and the other end is mounted on the inner wall of the protective cover (2).

8. The bridge crane sling visualization device according to claim 7, characterized in that: The unlocking device comprises a cylinder (4) fixed on the sling (1), and the rack (32) is slidably connected to the cylinder rod of the cylinder (4) along the length direction of the rack (32).

Images