Lightweight crane hoisting mechanism

Abstract

The utility model provides a lightweight crane hoisting mechanism, which relates to the technical field of crane hoisting, and comprises a mounting plate, a fixing plate, a winding drum, a brake, a circular ring support shell, a driving roller, a driving assembly, an electromagnetic clutch, a detection assembly and a controller, after the steel wire rope is jammed, the device can quickly detect that the rotating speed of the winding drum is reduced through the detection assembly, and if the rotating speed of the winding drum cannot be recovered within a specified time range, the controller controls the electromagnetic clutch to be powered off, so that the driving roller and the winding drum are instantaneously disconnected; meanwhile, the brake immediately brakes to prevent the heavy object from falling, and the maintenance and replacement process of the steel wire rope and the winding drum can be carried out after the heavy object is transferred away through standby hoisting equipment, so that the service life of the driving assembly is prolonged, and the potential safety hazard of breakage of the steel wire rope is reduced to the minimum; according to the design, the hoisting mechanism of the crane can be automatically protected, so that the operation process of the hoisting mechanism of the crane is better.

Description

Technical Field

[0001] This utility model relates to the field of crane lifting technology, and more specifically, to a lightweight crane lifting mechanism. Background Technology

[0002] Lightweight cranes have become an important technological innovation direction in the industrial field in recent years. Their core lies in reducing the weight of the equipment, reducing energy consumption, and improving efficiency through structural optimization, application of new materials, and intelligent design. They adopt a compact structure and optimized stress model, reducing the weight by 30%-40% compared with traditional equipment, and reducing wheel pressure and overall height by 10%-20%.

[0003] The hoisting mechanism of a crane consists of a drum, wire rope, and motor. Currently, the problem of wire rope jamming occurs during the operation of the hoisting structure. The main reasons for jamming include tangled wire rope (specifically, the wire rope jumps out of the drum's rope groove, squeezes into adjacent rope grooves, or gets into gaps on the edge of the drum) and uneven wear of the rope grooves (the rope grooves wear into a "step-like" shape after long-term use, making it impossible for the wire rope to move smoothly in and out). However, currently, when the wire rope jams due to the above reasons, personnel cannot detect it in time. If it remains jammed for a long time, it will cause damage to the motor. At the same time, excessive tension or friction of the wire rope can easily cause it to break, resulting in the falling of the load. The safety hazards during the crane hoisting process are relatively high. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a lightweight crane lifting mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A lightweight crane lifting mechanism includes a mounting plate, a fixing plate, a drum, a brake, a circular support shell, a drive roller, a drive assembly, an electromagnetic clutch, a detection assembly, and a controller.

[0007] The mounting plate is fixed to the construction platform of the crane trolley, and the mounting plate has long holes that allow the wire rope wound on the drum to pass through.

[0008] Two fixing plates and two brakes are respectively fixed on the mounting plate, with the brakes located on the outside of the fixing plates;

[0009] The drum is rotatably connected to the fixed plate, and both ends of the drum pass through the fixed plate and cooperate with the brakes located on both sides;

[0010] The circular support shell and the controller are fixed on the mounting plate, and the inside of the circular support shell is rotatably connected to the drive roller through the bearing;

[0011] The drive assembly is fixed on the circular support shell and is connected to the drive roller;

[0012] The electromagnetic clutch is fixed at one end of the drive roller and engages with the right end of the drum;

[0013] The detection components are installed on the drum and the controller to provide timely feedback signals and start timing when the wire rope jams;

[0014] The detection components, electromagnetic clutch, and brake are all electrically connected to the controller.

[0015] Furthermore, the drive assembly includes a worm gear reducer, a drive motor, and a chain drive assembly. The worm gear reducer is fixed on the annular support shell. The input end of the worm gear reducer is connected to the drive motor, and the output end of the worm gear reducer is connected to a drive roller through the chain drive assembly.

[0016] Furthermore, the input end of the worm gear reducer is connected to a hydraulic coupler, and the hydraulic coupler is connected to a drive motor.

[0017] Furthermore, the detection component includes an incremental encoder and a timer. The incremental encoder is located at the end of the drum away from the electromagnetic clutch, and the timer is mounted on the controller. Both the incremental encoder and the timer are electrically connected to the controller.

[0018] Furthermore, it also includes backup lifting equipment.

[0019] Furthermore, it also includes a control room, which is equipped with a buzzer electrically connected to the controller.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] Compared to existing technologies, this device can quickly detect a drop in drum speed after the wire rope becomes jammed. If the drum speed cannot recover within a specified time range, the controller immediately de-energizes the electromagnetic clutch to instantly disengage the connection between the drive roller and the drum. At the same time, the brake immediately applies the brakes to prevent the load from falling. The load is then transferred away using backup lifting equipment, allowing for the maintenance and replacement of the wire rope and drum. This extends the service life of the drive components and minimizes the safety hazard of wire rope breakage. This design can automatically protect the crane's lifting mechanism, resulting in a smoother crane lifting mechanism operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the installation of an electromagnetic clutch;

[0024] Figure label:

[0025] 1. Mounting plate; 2. Fixing plate; 3. Drum; 4. Brake; 5. Circular support shell; 6. Drive roller; 7. Drive assembly; 8. Electromagnetic clutch; 9. Controller; 10. Worm gear reducer; 11. Drive motor; 12. Chain drive assembly; 13. Hydraulic coupler; 14. Incremental encoder; 15. Timer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0027] like Figure 1 As shown, a lightweight crane lifting mechanism includes a mounting plate 1, a fixing plate 2, a drum 3, a brake 4, a circular support shell 5, a drive roller 6, a drive assembly 7, an electromagnetic clutch 8, a detection assembly, and a controller 9.

[0028] Mounting plate 1 is fixed on the construction platform of the crane trolley, and mounting plate 1 has a long hole that allows the wire rope wound on drum 3 to pass through.

[0029] Two fixing plates 2 and two brakes 4 are respectively fixed on the mounting plate 1, and the brakes 4 are located on the outside of the fixing plates 2;

[0030] The drum 3 is rotatably connected to the fixed plate 2, and both ends of the drum 3 pass through the fixed plate 2 and cooperate with the brakes 4 located on both sides;

[0031] The circular support shell 5 and the controller 9 are fixed on the mounting plate 1, and the active roller 6 is rotatably connected inside the circular support shell 5 through a bearing.

[0032] The drive assembly 7 is fixed on the annular support shell 5, and the drive assembly 7 is connected to the drive roller 6;

[0033] The electromagnetic clutch 8 is fixed at one end of the drive roller 6 and engages with the right end of the drum 3;

[0034] The detection components are installed on the drum 3 and the controller 9 to provide timely feedback signals and start timing when the wire rope is jammed;

[0035] The detection component, electromagnetic clutch 8, and brake 4 are all electrically connected to the controller 9.

[0036] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the drive assembly 7 includes a worm gear reducer 10, a drive motor 11, and a chain drive assembly 12. The worm gear reducer 10 is fixed on the annular support shell 5. The input end of the worm gear reducer 10 is connected to the drive motor 11, and the output end of the worm gear reducer 10 is connected to the drive roller 6 through the chain drive assembly 12.

[0037] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the detection component includes an incremental encoder 14 and a timer 15. The incremental encoder 14 is located at the end of the drum 3 away from the electromagnetic clutch 8, and the timer 15 is mounted on the controller 9. Both the incremental encoder 14 and the timer 15 are electrically connected to the controller 9.

[0038] In order to perform secondary fixation and transfer of heavy objects and avoid the original equipment from continuing to bear the load after braking, the above-described embodiment further optimizes the solution by including a backup lifting device, which can be either a winch or a crane.

[0039] To quickly alert workers after the wire rope jams and brakes, a further optimization of the above embodiment includes a control room, which is equipped with a buzzer electrically connected to the controller 9. The control room is not shown in the figure.

[0040] The working process of this utility model:

[0041] First, the controller 9 energizes the electromagnetic clutch 8, connecting the drive roller 6 to the drum 3. Then, the drive assembly 7 rotates the drum 3, initiating the lifting process. If the wire rope becomes jammed during the lifting of the load, the drum 3's rotational speed will decrease. The incremental encoder 14 quickly acquires this signal (the drum 3's rotational speed is pre-set and detected when the wire rope is not jammed). The incremental encoder 14 then transmits the signal to the timer 15, which begins timing. When the timer 15... Once the timing exceeds the preset time range, a signal is sent to the controller 9. The controller 9 then controls the electromagnetic clutch 8 to automatically cut off the power. After the power is cut off, the transmission between the drum 3 and the drive roller 6 is quickly interrupted. The controller 9 then controls the brake 4 to operate immediately, thus preventing the heavy object from falling. At this time, even if the drive component 7 cannot stop immediately, it will not be damaged, thus extending the service life of the drive component 7. After the drum 3 is braked in time, the wire rope can be prevented from continuing to rub violently due to jamming, thus significantly reducing the safety hazard of wire rope breakage.

[0042] Subsequently, an alarm is triggered to the staff in the control room via a buzzer. The staff can then use the backup lifting equipment to complete the secondary transfer of the heavy object. After the heavy object is transferred, the staff can release the brake by controlling the brake 4 via the controller 9, and then manually perform the maintenance process for the wire rope and drum 3.

[0043] In order to maintain stable synchronous motion between the drive motor 11 and the worm gear reducer 10, in some embodiments, such as Figure 2 As shown, the input end of the worm gear reducer 10 is connected to a hydraulic coupler 13, and the hydraulic coupler 13 is connected to a drive motor 11. This embodiment utilizes the flexibility and elasticity of the hydraulic coupler 13 to maintain stable synchronous motion between the drive motor 11 and the worm gear reducer 10, thereby achieving the purpose of coordinated work. At the same time, it can absorb vibration and impact, thus protecting the machine.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightweight crane hoist mechanism, characterized by, It includes a mounting plate (1), a fixing plate (2), a drum (3), a brake (4), a circular support shell (5), a drive roller (6), a drive assembly (7), an electromagnetic clutch (8), a detection assembly, and a controller (9). The mounting plate (1) is fixed on the construction platform of the crane trolley, and the mounting plate (1) has a long hole that allows the wire rope wound on the drum (3) to pass through. Two fixing plates (2) and two brakes (4) are respectively fixed on the mounting plate (1), and the brakes (4) are located outside the fixing plates (2); The drum (3) is rotatably connected to the fixed plate (2), and both ends of the drum (3) pass through the fixed plate (2) and cooperate with the brakes (4) located on both sides; The circular support shell (5) and the controller (9) are fixed on the mounting plate (1), and the inside of the circular support shell (5) is rotatably connected to the drive roller (6) through the bearing; The drive assembly (7) is fixed on the annular support shell (5), and the drive assembly (7) is connected to the drive roller (6); The electromagnetic clutch (8) is fixed at one end of the drive roller (6) and engages with the right end of the drum (3); The detection components are set on the drum (3) and the controller (9) to provide timely feedback signals and start timing when the wire rope is jammed; The detection component, electromagnetic clutch (8) and brake (4) are all electrically connected to the controller (9).

2. A lightweight crane hoisting mechanism according to claim 1, characterized in that The drive assembly (7) includes a worm gear reducer (10), a drive motor (11), and a chain drive assembly (12). The worm gear reducer (10) is fixed on the annular support shell (5). The input end of the worm gear reducer (10) is connected to the drive motor (11), and the output end of the worm gear reducer (10) is connected to the drive roller (6) through the chain drive assembly (12).

3. A lightweight crane hoisting mechanism according to claim 2, characterized in that The input end of the worm gear reducer (10) is connected to a hydraulic coupler (13), and the hydraulic coupler (13) is connected to a drive motor (11).

4. A lightweight crane hoisting mechanism according to claim 1, characterized in that The detection component includes an incremental encoder (14) and a timer (15). The incremental encoder (14) is located at the end of the drum (3) away from the electromagnetic clutch (8), and the timer (15) is mounted on the controller (9). Both the incremental encoder (14) and the timer (15) are electrically connected to the controller (9).

5. A lightweight crane hoisting mechanism according to claim 1, characterized in that It also includes backup lifting equipment.

6. A lightweight crane hoisting mechanism according to claim 1, characterized in that It also includes a control room, which is equipped with a buzzer that is electrically connected to the controller (9).

Images