Double-brake redundancy protection mechanism for electric hoist

Abstract

The utility model relates to the technical field of electric hoists, and discloses an electric hoist double-brake redundancy protection mechanism which comprises a motor, the outer surface of one side of the motor is fixedly connected with a shell, the outer surface of one side of the shell is fixedly connected with an outer frame, and the outer surface of the lower end of the shell is fixedly connected with a guide frame. A driving motor is fixedly connected to the outer surface of one side of the outer frame, a steel rope is arranged on the inner surface of the shell, and a rotating wheel is movably connected to the outer surface of the lower end of the steel rope. According to the electric hoist, the rotating shaft in transmission connection with the motor can be conveniently, rapidly and stably stopped, so that in the working process of the electric hoist, a transmission mechanism, the motor and a bearing can be protected, abnormal abrasion of the transmission mechanism and the bearing is reduced, the service life of the electric hoist is further prolonged, and a better use prospect can be brought.

Description

Technical Field

[0001] This utility model relates to the field of electric hoist technology, specifically to a dual-brake redundant protection mechanism for electric hoists. Background Technology

[0002] Electric hoists are lifting devices installed on overhead cranes and gantry cranes. They are characterized by their small size, light weight, simple operation, and ease of use. They are used in industrial and mining enterprises, warehouses, docks, and other places. Electric hoists have a compact structure, and those with the motor axis perpendicular to the drum axis use a worm gear transmission device.

[0003] However, it still has some drawbacks. For example, existing electric hoists have obvious safety hazards and mechanical wear problems when lifting heavy objects. Because the object carried by the hook has a large mass, a strong downward inertial force will be generated at the moment of starting or stopping, causing the hoisting system to swing violently. This instability not only increases the risk of the heavy object falling off the hook, but also causes continuous damage to the core components of the electric hoist. In addition, frequent impact loads will accelerate the aging of the insulation of the motor windings, and at the same time cause abnormal wear of the bearings and transmission mechanisms, which cannot provide protection.

[0004] To address the aforementioned issues, this application proposes a dual-brake redundant protection mechanism for electric hoists. Utility Model Content

[0005] The purpose of this utility model is to provide a dual-brake redundant protection mechanism for electric hoists, in order to solve the obvious safety hazards and mechanical wear problems of electric hoists when lifting heavy objects as mentioned in the background art. Due to the large mass of the object carried by the hook, a strong downward inertial force is generated at the moment of starting or stopping, causing the hoisting system to swing violently. This instability not only increases the risk of the heavy object falling off the hook, but also causes continuous damage to the core components of the electric hoist. In addition, frequent impact loads will accelerate the aging of the insulation of the motor windings, and at the same time cause abnormal wear of the bearings and transmission mechanisms, which cannot provide protection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-brake redundant protection mechanism for an electric hoist, comprising a motor, a housing fixedly connected to one outer surface of the motor, an outer frame fixedly connected to one outer surface of the housing, a guide frame fixedly connected to the lower outer surface of the housing, a drive motor fixedly connected to one outer surface of the outer frame, a steel rope provided on the inner surface of the housing, a rotating wheel movably connected to the lower outer surface of the steel rope, a hook fixedly connected to the lower outer surface of the rotating wheel, a side plate fixedly connected to the upper outer surface of the housing, and a pulley movably connected to the upper outer surface of the side plate.

[0007] Preferably, a threaded rod is connected to one side of the outer surface of the drive motor, an internally threaded sleeve is threaded to one end of the outer wall of the threaded rod, and a limit ring is fixedly connected to the other end of the threaded rod.

[0008] Preferably, the inner wall of the internally threaded sleeve is fitted with a sliding rod, and the internally threaded sleeve and the sliding rod are slidably connected.

[0009] Preferably, a connecting block one is fixedly connected to the outer wall of the internal threaded sleeve, a connecting plate one is fixedly connected to the upper outer surface of the connecting block one, a connecting block two is movably connected to the upper outer surface of the connecting plate one, a connecting plate two is fixedly connected to the upper outer surface of the connecting block two, and a brake block is fixedly connected to the upper outer surface of the connecting plate two.

[0010] Preferably, a limiting block is fixedly connected to one outer surface of the connecting plate two, a limiting frame is fixedly connected to the inner wall of the outer frame, a limiting groove is formed on one outer surface of the limiting frame, and the limiting block is located on the inner surface of the limiting groove. The limiting block and the limiting groove are slidably connected.

[0011] Preferably, a rotating shaft is connected to the center of one side of the outer shell, and a friction-resistant sleeve is fixedly connected to the outer surface of one end of the rotating shaft, and the connecting plate and the brake block are both located in the inner cavity of the friction-resistant sleeve.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the design of a drive motor, brake block, and friction-resistant sleeve, allows for rapid and smooth stopping of the electric hoist when a suspended object experiences severe shaking. The drive motor activates, causing the threaded rod to rotate. This rotation moves the internal threaded sleeve on the threaded rod axially to one side, sliding on the slide rod. Simultaneously, this movement unfolds the connecting plate, opening the connecting plate 2 (movably connected to the upper end of the connecting plate 1) and the brake block within the friction-resistant sleeve's inner cavity. The brake block then stops the friction-resistant sleeve connected to the rotating shaft, preventing further forward or reverse rotation. This allows for quick and smooth stopping of the rotating shaft connected to the motor, protecting the transmission mechanism, motor, and bearings during operation, reducing abnormal wear, and extending the electric hoist's lifespan. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a dual-brake redundant protection mechanism for an electric hoist according to the present invention;

[0015] Figure 2This is a schematic diagram of the friction-resistant sleeve and brake block in the dual-brake redundant protection mechanism of an electric hoist according to this utility model;

[0016] Figure 3 This is a schematic diagram of the drive motor and internal threaded sleeve in the dual-brake redundant protection mechanism of an electric hoist according to this utility model.

[0017] Figure 4 This is a side view of a dual-brake redundant protection mechanism for an electric hoist according to the present invention.

[0018] In the diagram: 1. Motor; 2. Housing; 3. Outer frame; 4. Guide frame; 5. Drive motor; 6. Steel rope; 7. Rotating wheel; 8. Hook; 9. Side plate; 10. Pulley; 11. Threaded rod; 12. Internal threaded sleeve; 13. Slide rod; 14. Connecting block one; 15. Connecting plate one; 16. Connecting block two; 17. Connecting plate two; 18. Brake block; 19. Limiting block; 20. Limiting frame; 21. Limiting groove; 22. Rotating shaft; 23. Friction-resistant sleeve; 24. Limiting ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In this embodiment, as Figures 2-4 As shown, the drive motor 5 drives the threaded rod 11 to rotate, causing the internal threaded sleeve 12 to move axially along the slide rod 13. Through the transmission chain composed of connecting block 14, connecting plate 15, and connecting block 26, the connecting plate 27 drives the brake block 18 to complete radial movement inside the friction-resistant sleeve 23. The cooperation between the limiting block 19 and the limiting slide groove 21 ensures that the movement process is smooth and controllable. When the brake block 18 contacts the inner wall of the friction-resistant sleeve 23, a controllable torque is generated, realizing precise control of the movement state of the steel rope 6. This mechanism converts the rotational input of the drive motor 5 into the radial braking output of the brake block 18 through multi-stage transmission, effectively suppressing the load swaying phenomenon and reducing the impact load on the motor 1 and the transmission system.

[0021] Please see Figures 1-4This utility model provides a technical solution: a dual-brake redundant protection mechanism for an electric hoist, specifically including a motor 1, a housing 2, an outer frame 3, a guide frame 4, a drive motor 5, a steel rope 6, a rotating wheel 7, a hook 8, a side plate 9, and a pulley 10. The motor 1 is fixedly connected to the side of the housing 2. The top of the housing 2 is connected to the pulley 10 via the side plate 9, and the bottom is welded to the guide frame 4. The outer frame 3 is fixedly mounted on the side of the housing 2, and the drive motor 5 is installed inside its cavity. The steel rope 6 is arranged around the interior space of the housing 2, and its ends are sequentially connected to the rotating wheel 7 and the hook 8. The drive motor 5 transmits power through a threaded rod 11, the first end of which... A limiting ring 24 with a stopping function is provided, and its end is threadedly engaged with an internal threaded sleeve 12. The internal threaded sleeve 12 has an axially sliding slide rod 13 inside, and a connecting block 14 is welded and fixed on its outer surface. The upper end of the connecting block 14 is hinged to the connecting block 26 via a connecting plate 15. The top of the connecting block 26 is rigidly connected to the connecting plate 27. A limiting block 19 is provided on the side of the connecting plate 27. The limiting block 19 and the limiting slide groove 21 on the limiting frame 20 fixed inside the outer frame 3 form a guide sliding pair. A brake block 18 is installed at the top of the connecting plate 27. The brake block 18 and the friction-resistant sleeve 23 at the end of the rotating shaft 22 in the transmission system of the outer shell 2 form a separable braking engagement.

[0022] Working principle:

[0023] With the drive motor 5, brake block 18, and friction-resistant sleeve 23, when the hook 8 experiences violent shaking while suspending an object, the drive motor 5 is activated. Under the action of the drive motor 5, the threaded rod 11 rotates. The rotation of the threaded rod 11 causes the internal threaded sleeve 12 on the threaded rod 11 to move axially to one side and slide on the slide rod 13. At the same time, during its movement, the connecting plate 15 unfolds, causing the connecting plate 17 and brake block 18, which are movably connected to the upper end of the connecting plate 15, to unfold inside the friction-resistant sleeve 23. The brake block 18 brakes the friction-resistant sleeve 23 connected to the rotating shaft 22, preventing the rotating shaft 22 from rotating in the forward or reverse direction. This allows us to quickly and smoothly stop the rotating shaft 22, which is connected to the motor 1, so that the electric hoist can protect the transmission mechanism, motor 1, and bearings during operation, reduce abnormal wear of the transmission mechanism and bearings, and further improve the service life of the electric hoist.

[0024] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A dual-brake redundant protection mechanism for an electric hoist, comprising a motor (1), characterized in that: A housing (2) is fixedly connected to one outer surface of the motor (1), an outer frame (3) is fixedly connected to one outer surface of the housing (2), a guide frame (4) is fixedly connected to the lower outer surface of the housing (2), a drive motor (5) is fixedly connected to one outer surface of the outer frame (3), a steel rope (6) is provided on the inner surface of the housing (2), a rotating wheel (7) is movably connected to the lower outer surface of the steel rope (6), a hook (8) is fixedly connected to the lower outer surface of the rotating wheel (7), a side plate (9) is fixedly connected to the upper outer surface of the housing (2), a pulley (10) is movably connected to the upper outer surface of the side plate (9), and a threaded rod (11) is drivenly connected to one outer surface of the drive motor (5). (11) has an internal threaded sleeve (12) threaded to one end of its outer wall. The other end of the threaded rod (11) has a limit ring (24) fixedly connected to its outer wall. The inner wall of the internal threaded sleeve (12) is fitted with a sliding rod (13), and the internal threaded sleeve (12) and the sliding rod (13) are slidably connected. The outer wall of the internal threaded sleeve (12) is fixedly connected to a connecting block one (14). The upper outer surface of the connecting block one (14) is fixedly connected to a connecting plate one (15). The upper outer surface of the connecting plate one (15) is movably connected to a connecting block two (16). The upper outer surface of the connecting block two (16) is fixedly connected to a connecting plate two (17). The upper outer surface of the connecting plate two (17) is fixedly connected to a brake block (18).

2. The electric hoist dual-brake redundant protection mechanism according to claim 1, characterized in that: A limiting block (19) is fixedly connected to one side of the outer surface of the connecting plate 2 (17), and a limiting frame (20) is fixedly connected to the inner wall of the outer frame (3).

3. The electric hoist dual-brake redundant protection mechanism according to claim 2, characterized in that: A limiting groove (21) is provided on one side of the outer surface of the limiting frame (20).

4. The electric hoist dual-brake redundant protection mechanism according to claim 2, characterized in that: The limiting block (19) is located on the inner surface of the limiting groove (21), and the limiting block (19) and the limiting groove (21) are slidably connected.

5. The electric hoist dual-brake redundant protection mechanism according to claim 4, characterized in that: A rotating shaft (22) is connected to the center of one side of the outer casing (2).

6. The electric hoist dual-brake redundant protection mechanism according to claim 5, characterized in that: A friction-resistant sleeve (23) is fixedly connected to the outer surface of one end of the rotating shaft (22), and the connecting plate (17) and the brake block (18) are both located in the inner cavity of the friction-resistant sleeve (23).

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