Electric chain hoist

Abstract

The utility model discloses an electric chain hoist which comprises a speed reduction assembly, the speed reduction assembly comprises a gearbox main body, a driving assembly used for driving hoisting is arranged on one side of the gearbox main body, a change gear set is arranged in the gearbox main body, a chain guide plate is arranged on one side of the gearbox main body, and a driving gear is arranged on one side of the chain guide plate. A chain is installed through the driving gear, the two ends of the chain penetrate out of the two sets of openings of the chain guide plate respectively, a lifting hook is installed at the end of the chain, and a hook is installed at the top of the gearbox body. According to the electric hoist, the speed reduction assembly is arranged to decelerate during hoisting, the situation that an existing electric hoist cannot decelerate is avoided, meanwhile, the resistance of speed reduction can be adjusted, the electric hoist can adapt to different loads conveniently by adjusting the resistance, and therefore the situation that hoisting energy supply is lost is avoided, potential safety hazards can be effectively avoided, and the hoisting efficiency is improved. And meanwhile, the damage condition can be reduced, the device is prevented from being maintained, and the use efficiency can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of electric hoist technology, and in particular to a chain electric hoist. Background Technology

[0002] Electric hoists are small, lightweight lifting devices widely used in industrial and mining enterprises, warehouses, docks, and other locations for lifting and moving heavy objects. They are characterized by their small size, light weight, simple operation, and ease of use. As a multi-functional and efficient lifting device, they are suitable for various industrial scenarios and are an indispensable tool in modern production and logistics. However, most existing electric chain hoists lack a load-limiting clutch, thus failing to provide adequate safety protection.

[0003] Most existing electric chain hoists do not have a load-limiting clutch for deceleration, thus failing to provide safety protection. Some hoists that do have a load-limiting clutch cannot be adjusted. When a certain overload is reached, the clutch begins to slip. If the gap between the friction plate and the friction disc cannot be adjusted after slippage, the friction between the friction plate and the friction disc will no longer generate the corresponding load friction, making it impossible to lift the load. In this case, the hoist loses its lifting function and needs to be opened to replace the load-limiting clutch before it can be used normally. This increases the safety hazard, makes maintenance difficult, and seriously affects the efficiency of use. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a chain electric hoist.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electric chain hoist includes a reduction gear assembly, which includes a gearbox body. A drive assembly for lifting is located on one side of the gearbox body. A gear set is installed inside the gearbox body. A chain guide plate is located on one side of the gearbox body, and a drive gear is located on the other side of the chain guide plate. A chain is mounted through the drive gear, with both ends of the chain passing through two sets of openings in the chain guide plate. A hook is installed at the end of the chain. A hook is installed on the top of the gearbox body. A front cover is detachably mounted on one side of the gearbox body. An electromagnetic brake is installed inside the front cover. The electromagnetic brake has splined teeth machined into its inner hole, through which a splined gear is mounted. A helical gear shaft is mounted through the splined gear. One end of the helical gear shaft is connected to the drive assembly. A flat washer is located on the end face of the splined gear. A brake spring is located on one side of the flat washer, and a spring washer is installed on one side of the brake spring. Two sets of thin nuts are installed on one end of the helical gear shaft, with the positions of the thin nuts matching the spring washers. A full-metal locking nut is located on one side of the thin nuts. A buffer protection assembly is located on the hook side.

[0007] As a further embodiment of this utility model: the drive assembly includes a drive motor, which is fixed to one side of the gearbox body. A coupling is installed at the end of the motor shaft of the drive motor, and a drive rod is installed through the coupling. One end of the drive rod is connected to the helical gear long shaft.

[0008] As a further improvement of this utility model: the protective component includes a buffer spring, the buffer spring is installed on the top of the hook, and a buffer pad is installed on the top of the hook.

[0009] As a further improvement of this utility model: a chain bag is detachably installed at the bottom of the gearbox body, and one end of the chain is connected to the chain bag.

[0010] As a further improvement of this utility model: two sets of quick-release plugs are provided on one side of the gearbox body, one end of the quick-release plug is connected to a wire, and the other end of the wire is connected to a controller.

[0011] As a further improvement of this utility model: one end of the drive motor is connected to a connecting shaft, a cooling fan is installed on the connecting shaft, and several sets of heat dissipation vents are opened on one side of the drive motor.

[0012] As a further improvement of this utility model: a coupling damping pad is installed on the coupling, and the size of the coupling damping pad is adapted to the coupling.

[0013] The beneficial effects of this utility model are as follows:

[0014] By incorporating a deceleration component, the hoist can be slowed down during lifting, preventing situations where existing electric hoists cannot decelerate. The resistance of the deceleration can be adjusted to accommodate different loads, thus preventing loss of lifting power and effectively avoiding safety hazards. It also reduces damage and minimizes maintenance, increasing efficiency. A protective component protects the gearbox body during hook as it rises, preventing damage caused by the hook exceeding its limits. A chain bag allows for chain winding, preventing the chain from drooping excessively and becoming entangled with other items, thus ensuring proper lifting operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main view of the electric chain hoist proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the heat dissipation part of a chain electric hoist proposed in this utility model.

[0017] Figure 3This is a schematic diagram of the structure of the buffer part of a chain electric hoist proposed in this utility model;

[0018] Figure 4 This is a structural diagram showing the disassembled drive and deceleration parts of an electric chain hoist proposed in this utility model.

[0019] In the diagram: 1. Drive motor; 2. Hook; 3. Gearbox set; 4. Gearbox body; 5. Front cover; 6. Quick-release plug; 7. Controller; 8. Chain bag; 9. Connecting shaft; 10. Cooling fan; 11. Chain; 12. Buffer spring; 13. Hook; 14. Buffer pad; 15. Helical gear long shaft; 16. Electromagnetic brake; 17. Chain guide plate; 18. Spline gear; 19. Flat washer; 20. All-metal lock nut; 21. Thin nut; 22. Spring washer; 23. Brake spring; 24. Drive rod; 25. Coupling damping pad; 26. Coupling. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] Example 1

[0023] A type of electric chain hoist, such as Figures 1-4As shown, the system includes a reduction gear assembly, which includes a gearbox body 4. A drive assembly for driving the hoisting is located on one side of the gearbox body 4. A gear set 3 is installed inside the gearbox body 4. A chain guide plate 17 is located on one side of the gearbox body 4, and a drive gear is located on one side of the chain guide plate 17. A chain 11 is mounted through the drive gear, with both ends of the chain 11 passing through two sets of openings in the chain guide plate 17. A hook 13 is installed at the end of the chain 11. A hook 2 is installed on the top of the gearbox body 4. A front cover 5 is detachably installed on one side of the gearbox body 4, and an electromagnetic brake 16 is installed inside the front cover 5. The magnetic brake 16 has splined teeth machined in its inner hole. A splined gear 18 is installed through the splined teeth. A helical gear long shaft 15 is installed through the splined gear 18. One end of the helical gear long shaft 15 is connected to the drive assembly. A flat washer 19 is provided on the end face of the splined gear 18. A brake spring 23 is provided on one side of the flat washer 19. A spring washer 22 is installed on one side of the brake spring 23. Two sets of thin nuts 21 are installed on one end of the helical gear long shaft 15. The position of the thin nuts 21 is adapted to the spring washer 22. A full metal locking nut 20 is provided on one side of the thin nuts 21. A protective component for buffering is provided on one side of the hook 13.

[0024] In use, the hook 2 is suspended in the installation position to complete the installation of the device. After installation, the drive assembly controls the rotation of the helical gear shaft 15, which in turn drives the speed-changing gear set 3. The speed-changing gear set 3 controls the rotation of the drive gear of the guide plate 17, thereby controlling the extension and retraction of the chain 11. By switching between forward and reverse rotation, the chain 11 can be extended and retracted. After connecting the hook 13 to the item to be lifted, the chain 11 can be lifted and lowered by controlling its extension and retraction. The product standard stipulates that when the electric hoist is lifting 1.3-1.6 times the rated load, the safety clutch should slip, and when the load is less than 1.3 times the rated load, the safety clutch should work normally. To meet this requirement... The thin nut 21 is adjusted, and then locked with the all-metal locking nut 20 to prevent loosening, thereby adjusting the elastic force of the brake spring 23. This adjusts the resistance of the electromagnetic brake 16, thus slowing down the rotation of the helical gear shaft 15 and achieving the load limiting function. If further adjustment is needed, simply remove the front cover 5 to adjust the electromagnetic brake 16 and further regulate the resistance. Adjusting the resistance of the electromagnetic brake 16 can provide protection as needed, preventing situations where deceleration is impossible. Adjusting the resistance also allows for adaptation to different loads, preventing loss of lifting power and effectively reducing safety hazards. Furthermore, it facilitates deceleration maintenance and increases efficiency during use.

[0025] The drive assembly includes a drive motor 1, which is fixed to one side of the gearbox body 4 by bolts. A coupling 26 is installed at the end of the motor shaft of the drive motor 1, and a drive rod 24 is installed through the coupling 26. One end of the drive rod 24 is connected to the helical gear long shaft 15.

[0026] In use, the drive motor 1 can control the drive rod 24 to rotate, the drive rod 24 can drive the helical long shaft 15 to rotate, the rotation of the helical long shaft 15 can synchronously control the rotation of the speed change gear set 3 to control the movement of the chain 11, thereby controlling the hook 13 to rise and fall to complete the hoisting of the load.

[0027] The protective component includes a buffer spring 12, which is installed on the top of the hook 13, and a buffer pad 14 is installed on the top of the hook 13.

[0028] In use, the buffer pad 14, together with the buffer spring 12, can provide buffer protection when the hook 13 rises to a certain position and contacts the gearbox body 4, thus preventing the hook 13 from colliding with the gearbox body 4 and causing damage. At the same time, it can also prevent the hook 13 from moving beyond its limit and causing damage. A micro switch can be installed at the bottom of the gearbox body 4. By having the hook 13 contact the micro switch, the chain 11 can be stopped from moving, thereby limiting the maximum height of the hook 13.

[0029] For easy storage of chain 11, such as Figure 1 , 4 As shown, a chain bag 8 is detachably installed at the bottom of the gearbox body 4, and one end of the chain 11 is connected to the chain bag 8;

[0030] When in use, the chain 11 is rolled up inside the chain bag 8. After rolling up, the chain 11 is prevented from hanging down naturally, thus preventing the chain 11 from hanging down too long and getting tangled with other items, affecting normal use and thus avoiding affecting normal lifting.

[0031] For ease of control, such as Figure 1 , 3 As shown, two sets of quick-release plugs 6 are provided on one side of the gearbox body 4. One end of the quick-release plug 6 is connected to a wire, and the other end of the wire is connected to a controller 7.

[0032] In use, two sets of quick-release plugs 6 can be used to connect two sets of circuits respectively. The two sets of circuits are connected to the controller 7 and the plug respectively. Connecting the plug to the power supply can provide power and enable the device to operate normally. The controller 7 can control the raising and lowering of the hook 13.

[0033] To facilitate heat dissipation, such as Figure 2 As shown, one end of the drive motor 1 is connected to a connecting shaft 9, a cooling fan 10 is installed on the connecting shaft 9, and several sets of heat dissipation vents are opened on one side of the drive motor 1.

[0034] When in use, after the connecting shaft 9 is connected to the drive motor 1, the drive motor 1 can drive the cooling fan 10 to rotate, thereby cooperating with the heat dissipation port to dissipate heat from the drive motor 1 and prevent it from overheating.

[0035] Example 2

[0036] To reduce noise, refer to Figure 4 A chain electric hoist, in this embodiment, the following improvements are made compared to embodiment 1: a coupling damping pad 25 is installed on the coupling 26, and the size of the coupling damping pad 25 is adapted to the coupling 26;

[0037] When in use, after the coupling damping pad 25 is installed on the coupling 26, the vibration and noise can be effectively reduced by the coupling damping pad 25, thereby playing a role in noise reduction.

[0038] The above description is only a preferred embodiment of the present utility model. For parts that do not require creative effort in circuit control, signal control and transmission, please refer to the prior art. However, the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A chain electric hoist comprising a reduction assembly, characterized in that, The deceleration assembly comprises a gearbox body (4), a driving assembly for driving lifting is arranged on one side of the gearbox body (4), a gear shifting gear set (3) is arranged in the gearbox body (4), a chain guide plate (17) is arranged on one side of the gearbox body (4), a driving gear is arranged on one side of the chain guide plate (17), a chain (11) is installed through the driving gear, the chain (11) is respectively threaded out from two groups of openings of the chain guide plate (17), a lifting hook (13) is installed at the end of the chain (11), a hook (2) is installed on the top of the gearbox body (4), a front cover (5) is detachably installed on one side of the gearbox body (4), an electromagnetic brake (16) is installed in the front cover (5), a spline tooth is processed in the inner hole of the electromagnetic brake (16), a spline gear (18) is installed through the spline tooth, a helical tooth long shaft (15) is installed through the spline gear (18), one end of the helical tooth long shaft (15) is connected with the driving assembly, a flat washer (19) is arranged on the end face of the spline gear (18), a brake spring (23) is arranged on one side of the flat washer (19), a spring washer (22) is installed on one side of the brake spring (23), two groups of thin nuts (21) are installed on one end of the helical tooth long shaft (15), the positions of the thin nuts (21) are matched with the spring washer (22), a full-metal locking nut (20) is arranged on one side of the thin nut (21), a protection assembly for buffering is arranged on one side of the lifting hook (13).

2. A chain hoist according to claim 1, characterized in that The driving assembly comprises a driving motor (1), the driving motor (1) is fixed on one side of the gearbox body (4), a shaft coupling (26) is installed at the end of the motor shaft of the driving motor (1), a driving rod (24) is installed through the shaft coupling (26), one end of the driving rod (24) is connected with the helical tooth long shaft (15).

3. A chain hoist according to claim 1, characterized in that The protection assembly comprises a buffer spring (12), the buffer spring (12) is installed on the top of the lifting hook (13), a buffer pad (14) is installed on the top end of the lifting hook (13).

4. A strand electric hoist according to claim 1, characterized in that, The chain bag (8) is detachably installed at the bottom of the gearbox body (4), one end of the chain (11) is connected in the chain bag (8).

5. A strapping chain electric hoist according to claim 1, characterized in that, Two groups of quick release plugs (6) are arranged on one side of the gearbox body (4), a line is connected at one end of the quick release plug (6), a controller (7) is connected at one end of the line.

6. A strand electric hoist according to claim 2, characterized in that One end of the driving motor (1) is connected with a connecting shaft (9), a heat dissipation fan (10) is installed on the connecting shaft (9), a plurality of heat dissipation openings are arranged on one side of the driving motor (1).

7. A strapping chain motor hoist according to claim 2, characterized in that The shaft coupling (26) is installed with a shaft coupling shock pad (25), the size of the shaft coupling shock pad (25) is matched with the shaft coupling (26).

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