Lifting device with load limiting function

Abstract

The utility model discloses a lifting device with a load limiting function, and belongs to the technical field of lifting devices. In order to solve the problems that the safety of a lifting device is general, load limiting cannot be sensed in time, and the speed reducing and braking effect of equipment is poor, the position of a movable seat is adjusted according to the lifting position after the movable seat is moved, and a first side magnetic braking motor drives a limiting shaft and a positioning gear disc to rotate, so that the movable seat moves integrally to adapt to the required position; the safety effect of the movable seat can be improved through the first side magnetic brake motor, the magnetic pole can be switched on and off through the magnetic pole coil in the braking work, so that the position of the clamping device can be controlled, braking work can be conveniently conducted on the rotor and the output shaft, safety and stability are improved, the structure is simple, and goods can be hooked through the lifting hook in the using process; the telescopic plate drives the tension spring to pull the tension sensor, so that the tension sensor senses the weight of goods, and the bearing weight of the lifting hook can be detected in time.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting device with a load limiting function. Background Art

[0002] A hoisting device is a specialized lifting device installed on overhead cranes and gantry cranes. It features a small size, light weight, simple operation, and ease of use. It is used in industrial and mining enterprises, warehouses, docks, and other locations. The hoisting device has a compact structure, with the motor axis perpendicular to the drum axis and utilizing a worm gear drive. The hydraulic system features dual control, with a relief valve and magnetic contact pressure gauge for precise pressure control. The electrical control system utilizes low-voltage control, enhancing system safety.

[0003] In the prior art, there is a hand chain hoist load limiting device with announcement number: CN215756091U, which includes a long shaft, a hand chain wheel and a lifting sprocket. The patent adjusts the clamping force of the disc spring on the friction plate by adjusting the screw, and can adjust the friction force of the friction plate according to the situation. The protective device is used to prevent overload and realize the load limiting protection function of the hand chain hoist.

[0004] The following defects often occur during the operation of the lifting device of the above patent:

[0005] 1. The safety of the lifting device is average.

[0006] 2. Unable to sense load limit in time.

[0007] 3. The deceleration and braking effect of the equipment is poor.

[0008] In view of these defects, it is necessary to design a lifting device with a load limiting function. Utility Model Content

[0009] The purpose of the utility model is to provide a lifting device with a load limiting function, which has the advantages of good safety and timely induction of load limiting, and can solve the problems in the prior art.

[0010] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lifting device with a load limiting function, comprising a lifting device cover, a rotating drum is installed in the middle of the interior of the lifting device cover, a steel wire rope is installed on the outside of the rotating drum, a connecting disk is installed at the lower end of the steel wire rope, load limiting detectors are installed on both sides of the outside of the connecting disk, a telescopic plate is installed at the lower end of the load limiting detector, a hook is installed below the telescopic plate, a moving seat is installed above the lifting device cover, a first side magnetic brake motor is installed on the outside of the moving seat, a clutch cover is installed on one side of the lifting device cover, a second side magnetic brake motor is installed on one side of the clutch cover, and mounting sleeves are installed on the upper and lower ends of the clutch cover, an electric cylinder is installed inside the mounting sleeve, wireless transmission modules are provided on the outside of the mounting sleeve and the load limiting detector, and the wireless transmission module includes a PLC controller.

[0011] Preferably, bearing seats are installed on both sides of the outside of the lifting device cover, and the rotating drum is rotatably connected to the lifting device cover through the bearing seats. A notch is provided at the lower end of the lifting device cover, and the wire rope passes through the notch and extends to the inside of the connecting disk and is slidably connected to the connecting disk through a pulley.

[0012] Preferably, a tension sensor is installed inside the load limit detector, a tension spring is installed at the lower end of the tension sensor, the upper end of the telescopic plate extends to the inside of the load limit detector and is fixedly connected to the tension spring, and sliding grooves are provided on both sides of the inner surface of the load limit detector, the telescopic plate is slidably connected to the load limit detector through the sliding grooves, a connecting shaft is installed at the lower end of the telescopic plate, and a connecting head is installed at the upper end of the hook, and the connecting head is connected to the telescopic plate through the connecting shaft.

[0013] Preferably, a positioning gear disc is installed inside the movable seat, and two positioning gear discs are provided. A limiting shaft is installed between the two positioning gear discs, and the first side magnetic brake motor is fixedly connected to the limiting shaft through a coupling.

[0014] Preferably, the front ends of the first lateral magnetic brake motor and the second lateral magnetic brake motor are both equipped with lateral magnetic brake mounting covers, the inside of the lateral magnetic brake mounting covers is equipped with a rotor, the inside of the rotor is penetrated by an output shaft, the output shaft passes through the rotor and the clutch cover and extends to the inside of the lifting device cover and is connected to the rotating drum transmission, the outside of the rotor is provided with a magnetic pole coil, there are several magnetic pole coils, and brake springs are installed inside the several magnetic pole coils, and a clamp is installed at the lower end of the magnetic pole coil.

[0015] Preferably, a pressure plate is installed inside the clutch cover, a friction plate is provided on one side of the pressure plate, a flywheel is installed on one side of the friction plate, the flywheel is meshed with the rotating drum, the pressure plate is slidingly connected to the output shaft through a bearing, and the friction plate is fixedly connected to the output shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This side magnetic brake system is a lifting device with a clutch load limiting device. When in use, the position of the moving seat can be adjusted according to the lifting position. The first side magnetic brake motor drives the limit shaft and the positioning gear plate to rotate, so that the moving seat moves as a whole to adapt to the required position. The first side magnetic brake motor can improve the safety effect of the moving seat. During braking, the magnetic pole can be switched by the magnetic pole coil to control the position of the clamp, which is convenient for braking the rotor and output shaft, improving safety and stability. It has a simple structure and is easy to use.

[0018] 2. This side magnetic brake system is equipped with a lifting device with a clutch load limiting device. During use, cargo can be hooked through the hook. When the hook is working, the tension spring is driven by the telescopic plate to pull the tension sensor, so that the tension sensor senses the weight of the cargo, and the load-bearing weight of the hook can be detected in time. The weight can be judged in time by the PLC controller and transmitted to the second side magnetic brake motor through the wireless transmission module. If the weight is overloaded, the second side magnetic brake motor can be turned off in time, and the pressure plate can be pushed by the electric cylinder to deform the friction plate and squeeze the flywheel, so that the drum stops rotating and maintains stability, thereby improving the safety effect. The dual deceleration braking by the clamp and clutch improves the deceleration effect, which is conducive to long-term work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall front view of the utility model;

[0020] Figure 2 This is a diagram of the internal structure of the load limit detector of the present utility model;

[0021] Figure 3 This is a diagram of the internal structure of the clutch cover of the present utility model;

[0022] Figure 4 This is a diagram of the internal structure of the side magnetic brake mounting cover of the present utility model.

[0023] In the figure: 1. Lifting device cover; 2. Bearing seat; 3. Notch; 4. Rotating drum; 5. Wire rope; 6. Connecting plate; 7. Load limit detector; 8. Wireless transmission module; 9. Telescopic plate; 10. Connector; 11. Hook; 12. Moving seat; 13. Positioning gear plate; 14. Limiting shaft; 15. First side magnetic brake motor; 16. Clutch cover; 17. Second side magnetic brake motor; 18. Mounting sleeve; 19. Tension sensor; 20. Tension spring; 21. Sliding groove; 22. Connecting shaft; 23. Flywheel; 24. Friction plate; 25. Pressure plate; 26. Electric cylinder; 27. Side magnetic brake mounting cover; 28. Output shaft; 29. ​​Rotor; 30. Clamp; 31. Pole coil. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-4 A lifting device with a load limiting function includes a lifting device cover 1, a rotating drum 4 is installed in the middle of the lifting device cover 1, a steel wire rope 5 is installed on the outside of the rotating drum 4, a connecting plate 6 is installed at the lower end of the steel wire rope 5, and load limiting detectors 7 are installed on both sides of the outside of the connecting plate 6. A telescopic plate 9 is installed at the lower end of the load limiting detector 7, and a hook 11 is installed below the telescopic plate 9. A moving seat 12 is installed above the lifting device cover 1, and a first side magnetic brake motor 15 is installed on the outside of the moving seat 12. A clutch cover 16 is installed on one side of the lifting device cover 1, and a second side magnetic brake motor 17 is installed on one side of the clutch cover 16. A mounting sleeve 18 is installed on the upper and lower ends of the clutch cover 16, and an electric cylinder 26 is installed inside the mounting sleeve 18. The mounting sleeve 18 and the load limiting detector 7 The outside of the device is provided with a wireless transmission module 8, and the wireless transmission module 8 includes a PLC controller. During use, the cargo can be hooked by the hook 11. When the hook 11 is working, the tension spring 20 is driven by the telescopic plate 9 to pull the tension sensor 19, so that the tension sensor 19 senses the weight of the cargo, and the carrying weight of the hook 11 can be detected in time. The weight can be judged in time by the PLC controller and transmitted to the second side magnetic brake motor 17 through the wireless transmission module 8. If the weight is overloaded, the second side magnetic brake motor 17 can be turned off in time, and the pressure plate 25 can be pushed by the electric cylinder 26 to deform the friction plate 24 and squeeze the flywheel 23, so that the drum 4 stops rotating and maintains stability, thereby improving the safety effect. The double deceleration brake of the clamp 30 and the clutch can improve the deceleration effect, which is conducive to long-term work.

[0026] Bearing seats 2 are installed on both sides of the outside of the lifting device cover 1. The rotating drum 4 is rotatably connected to the lifting device cover 1 through the bearing seats 2. A notch 3 is provided at the lower end of the lifting device cover 1. The wire rope 5 passes through the notch 3 and extends to the inside of the connecting disk 6 and is slidably connected to the connecting disk 6 through a pulley. The rotating drum 4 rotates, driving the wire rope 5 to move and perform lifting operations.

[0027] A tension sensor 19 is installed inside the load limit detector 7, and a tension spring 20 is installed at the lower end of the tension sensor 19. The upper end of the telescopic plate 9 extends to the inside of the load limit detector 7 and is fixedly connected to the tension spring 20, and sliding grooves 21 are provided on both sides of the inner surface of the load limit detector 7. The telescopic plate 9 is slidingly connected to the load limit detector 7 through the sliding grooves 21. A connecting shaft 22 is installed at the lower end of the telescopic plate 9, and a connecting head 10 is installed at the upper end of the hook 11. The connecting head 10 is connected to the telescopic plate 9 through the connecting shaft 22. When the hook 11 is working, the tension spring 20 is driven by the telescopic plate 9 to pull the tension sensor 19, so that the tension sensor 19 senses the weight of the goods, and can timely detect the carrying weight of the hook 11, and can timely judge the weight through the PLC controller.

[0028] A positioning gear plate 13 is installed inside the movable seat 12. There are two positioning gear plates 13. A limiting shaft 14 is installed between the two positioning gear plates 13. The first side magnetic brake motor 15 is fixedly connected to the limiting shaft 14 through a coupling. The limiting shaft 14 and the positioning gear plate 13 are driven to rotate by the first side magnetic brake motor 15, so that the movable seat 12 moves as a whole to adapt to the required position.

[0029] The front ends of the first side magnetic brake motor 15 and the second side magnetic brake motor 17 are both equipped with side magnetic brake mounting covers 27, and a rotor 29 is installed inside the side magnetic brake mounting cover 27. An output shaft 28 runs through the inside of the rotor 29, and the output shaft 28 passes through the rotor 29 and the clutch cover 16 and extends to the inside of the lifting device cover 1 and is transmission-connected to the drum 4. A magnetic pole coil 31 is provided on the outside of the rotor 29, and there are several magnetic pole coils 31. Braking springs are installed inside the several magnetic pole coils 31, and a clamp 30 is installed at the lower end of the magnetic pole coil 31. During braking work, the magnetic pole can be switched by the magnetic pole coil 31, so that the position of the clamp 30 can be controlled, which facilitates the braking of the rotor 29 and the output shaft 28, improves safety and stability, and has a simple structure and is easy to use.

[0030] A pressure plate 25 is installed inside the clutch cover 16, and a friction plate 24 is provided on one side of the pressure plate 25. A flywheel 23 is installed on one side of the friction plate 24. The flywheel 23 is meshed with the rotating drum 4. The pressure plate 25 is slidably connected to the output shaft 28 through a bearing, and the friction plate 24 is fixedly connected to the output shaft 28. The pressure plate 25 is pushed by the electric cylinder 26 to deform the friction plate 24 and squeeze the flywheel 23, so that the rotating drum 4 stops rotating and remains stable, thereby improving the safety effect. The double deceleration brake of the clamp 30 and the clutch can improve the deceleration effect, which is conducive to long-term operation.

[0031] In summary, the side magnetic brake system of the present invention is a lifting device with a clutch load limiting device. After the movable seat 12 is moved, the position of the movable seat 12 is adjusted according to the lifting position. The first side magnetic brake motor 15 drives the limit shaft 14 and the positioning gear plate 13 to rotate, so that the movable seat 12 moves as a whole to adapt to the required position. The cargo is hooked by the hook 11, and the second side magnetic brake motor 17 drives the rotating drum 4 to rotate, and drives the wire rope 5 to move to perform the lifting operation. The safety effect of the movable seat 12 can be improved by the first side magnetic brake motor 15. During the braking work, the magnetic pole can be switched by the magnetic pole coil 31, so that the position of the clamp 30 can be controlled, which is convenient for braking the rotor 29 and the output shaft 28. Working, improving safety and stability, when the hook 11 is working, the tension spring 20 is driven by the telescopic plate 9 to pull the tension sensor 19, so that the tension sensor 19 senses the weight of the goods, and can timely detect the carrying weight of the hook 11. The weight can be timely judged by the PLC controller and transmitted to the second side magnetic brake motor 17 through the wireless transmission module 8. If the weight is overloaded, the second side magnetic brake motor 17 can be turned off in time, and the pressure plate 25 can be pushed by the electric cylinder 26 to deform the friction plate 24 and squeeze the flywheel 23, so that the drum 4 stops rotating and keeps stable, thereby improving the safety effect, and the double deceleration brake braking by the clamp 30 and the clutch can improve the deceleration effect, which is conducive to long-term work.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device with a load limiting function, comprising a lifting device cover (1), characterized in that: A rotating drum (4) is installed in the middle of the interior of the lifting device cover (1), a steel wire rope (5) is installed on the outside of the rotating drum (4), a connecting plate (6) is installed at the lower end of the steel wire rope (5), and load limit detectors (7) are installed on both sides of the outside of the connecting plate (6), a telescopic plate (9) is installed at the lower end of the load limit detector (7), a hook (11) is installed below the telescopic plate (9), a moving seat (12) is installed above the lifting device cover (1), and a first side seat (12) is installed outside the moving seat (12). A magnetic brake motor (15) is provided. A clutch cover (16) is installed on one side of the lifting device cover (1). A second side magnetic brake motor (17) is installed on one side of the clutch cover (16). A mounting sleeve (18) is installed on the upper and lower ends of the clutch cover (16). An electric cylinder (26) is installed inside the mounting sleeve (18). A wireless transmission module (8) is provided outside the mounting sleeve (18) and the load limit detector (7), and the wireless transmission module (8) includes a PLC controller.

2. A lifting device with load limiting function according to claim 1, characterized in that: Bearing seats (2) are installed on both sides of the outside of the lifting device cover (1), and the rotating drum (4) is rotatably connected to the lifting device cover (1) through the bearing seats (2). A notch (3) is provided at the lower end of the lifting device cover (1), and the steel wire rope (5) passes through the notch (3) and extends to the inside of the connecting disk (6) and is slidably connected to the connecting disk (6) through a pulley.

3. The lifting device with load limiting function according to claim 1, characterized in that: A tension sensor (19) is installed inside the load limit detector (7), and a tension spring (20) is installed at the lower end of the tension sensor (19). The upper end of the telescopic plate (9) extends to the inside of the load limit detector (7) and is fixedly connected to the tension spring (20), and sliding grooves (21) are provided on both sides of the inner surface of the load limit detector (7). The telescopic plate (9) is slidably connected to the load limit detector (7) through the sliding grooves (21). A connecting shaft (22) is installed at the lower end of the telescopic plate (9), and a connecting head (10) is installed at the upper end of the hook (11), and the connecting head (10) is connected to the telescopic plate (9) through the connecting shaft (22).

4. The lifting device with load limiting function according to claim 1, characterized in that: A positioning gear disc (13) is installed inside the movable seat (12), and two positioning gear discs (13) are provided. A limiting shaft (14) is installed between the two positioning gear discs (13), and the first side magnetic brake motor (15) is fixedly connected to the limiting shaft (14) through a coupling.

5. The lifting device with load limiting function according to claim 1, characterized in that: The front ends of the first lateral magnetic brake motor (15) and the second lateral magnetic brake motor (17) are both equipped with lateral magnetic brake mounting covers (27), a rotor (29) is installed inside the lateral magnetic brake mounting cover (27), an output shaft (28) is passed through the inside of the rotor (29), the output shaft (28) passes through the rotor (29) and the clutch cover (16) and extends to the inside of the lifting device cover (1) and is transmission-connected to the rotating drum (4), a magnetic pole coil (31) is arranged outside the rotor (29), a plurality of magnetic pole coils (31) are provided, a brake spring is installed inside the plurality of magnetic pole coils (31), and a clamp (30) is installed at the lower end of the magnetic pole coil (31).

6. The lifting device with load limiting function according to claim 5, characterized in that: A pressure plate (25) is installed inside the clutch cover (16), a friction plate (24) is provided on one side of the pressure plate (25), a flywheel (23) is installed on one side of the friction plate (24), the flywheel (23) is meshedly connected with the rotating drum (4), the pressure plate (25) is slidably connected to the output shaft (28) through a bearing, and the friction plate (24) is fixedly connected to the output shaft (28).

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