Anti-slip chain block structure

Abstract

The utility model belongs to the technical field of mechanical structure design, and particularly relates to an anti-slip chain block structure which comprises a U-shaped support, a top frame and an annular chain groove, the top frame is fixedly installed at the top end of the U-shaped support, and a first rotating shaft and a second rotating shaft are rotationally arranged between the two opposite side walls of the U-shaped support. The first rotating shaft and the second rotating shaft are arranged in parallel up and down, the first rotating shaft is fixedly sleeved with a worm gear, a worm is rotationally arranged between the two opposite side walls of the top frame, the worm and the worm gear are arranged in a matched mode, the second rotating shaft is fixedly sleeved with the annular chain groove, and a chain is wound around the annular chain groove. The first rotating shaft is fixedly sleeved with a driving gear, and the second rotating shaft is fixedly sleeved with a driven gear. By means of the worm and gear self-locking principle, when a power source stops working, worm and gear transmission is locked immediately, and reverse sliding of the chain due to external force is effectively prevented.

Description

A non-slip chain hoist structure Technical Field

[0001] This utility model belongs to the field of mechanical structure design technology, specifically referring to an anti-slip chain hoisting structure. Background Technology

[0002] In industrial production, construction, and equipment maintenance, chain hoists are a commonly used manual lifting tool, widely applied due to their compact structure and ease of operation.

[0003] Traditional chain hoists primarily rely on brake pads for braking. Once a load is lifted to a designated position, the brake pads prevent the chain from slipping due to friction, maintaining the load's suspension. However, in actual use, brake pads are constantly subjected to frictional wear. With increased usage and the influence of the working environment (such as high temperature, humidity, and dust), brake pads experience wear, aging, and oil buildup, leading to decreased friction and ultimately brake slippage. Once the brake pads slip, the load loses effective braking and is highly likely to fall, causing equipment damage and potentially endangering the lives of operators. Furthermore, frequent brake pad replacements increase equipment maintenance costs and downtime, reducing work efficiency. Therefore, a new chain hoist structure is urgently needed to solve the technical challenge of brake pad slippage. Summary of the Invention

[0004] To solve the above problems, this utility model provides an anti-slip chain hoisting structure that utilizes the self-locking principle of worm gears. When the power source stops working, the worm gear transmission immediately locks, effectively preventing the chain from sliding in the opposite direction due to external forces.

[0005] To achieve the above functions, the technical solution adopted by this utility model is as follows: an anti-slip chain hoist structure, including a U-shaped bracket, a top frame, and an annular chain groove. The top frame is fixedly installed on the top of the U-shaped bracket. A rotating shaft one and a rotating shaft two are rotatably arranged between the opposite side walls of the U-shaped bracket. The rotating shaft one and the rotating shaft two are arranged vertically parallel. A worm gear is fixedly sleeved on the rotating shaft one. A worm is rotatably arranged between the opposite side walls of the top frame. The worm and the worm gear are configured to cooperate. The annular chain groove is fixedly sleeved on the rotating shaft two. A chain is wound around the annular chain groove. A main gear is fixedly sleeved on the rotating shaft one. A driven gear is fixedly sleeved on the rotating shaft two. The driven gear and the main gear are meshed. The problem of slippage of the brake pads in traditional chain hoists is solved by utilizing the self-locking principle of the worm gear and worm.

[0006] As a preferred embodiment of this utility model, two sets of main gears and two sets of driven gears are provided respectively, with the two sets of main gears located on both sides of the worm gear and the two sets of driven gears located on both sides of the annular chain groove.

[0007] As a preferred embodiment of this utility model, the inner wall of the annular chain groove is provided with a groove that matches the chain link, forming a precise interlocking structure, which effectively prevents the chain from slipping.

[0008] Compared with the prior art, the present invention achieves the following beneficial effects by adopting the above structure:

[0009] 1. Utilizing the self-locking principle of worm gears, when the power source stops working, the worm gear transmission pair will immediately lock, effectively preventing the chain from sliding in the opposite direction due to external forces. Compared with traditional brake pad braking, it eliminates the risk of slippage from the mechanical structure level, greatly improving the safety of lifting operations, and is especially suitable for dangerous operation scenarios such as high-altitude and heavy-load operations.

[0010] 2. By setting two sets of main gears and driven gears, a symmetrical transmission structure is formed, which makes the force on shaft one and shaft two more even, reduces shaft wear and transmission deviation caused by unilateral force, and optimizes the power transmission path, reduces energy loss, and improves overall transmission efficiency and stability by combining worm gear and gear transmission. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the overall structure of an anti-slip chain hoist structure proposed in this utility model;

[0012] Figure 2 is a bottom view of the overall structure of the anti-slip chain hoisting structure proposed in this utility model;

[0013] Figure 3 is a top view of the overall structure of the anti-slip chain hoisting structure proposed in this utility model.

[0014] Among them, 1. U-shaped bracket, 2. top frame, 3. annular chain groove, 4. rotating shaft one, 5. rotating shaft two, 6. worm gear, 7. worm, 8. chain, 9. main gear, 10. driven gear. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0017] As shown in Figures 1-3, the present invention provides an anti-slip chain hoisting structure, including a U-shaped bracket 1, a top frame 2, and an annular chain groove 3. The top frame 2 is fixedly installed on the top of the U-shaped bracket 1. A first rotating shaft 4 and a second rotating shaft 5 are rotatably arranged between the opposite side walls of the U-shaped bracket 1, with the first rotating shaft 4 and the second rotating shaft 5 arranged vertically parallel. A worm gear 6 is fixedly sleeved on the first rotating shaft 4. A worm 7 is rotatably arranged between the opposite side walls of the top frame 2, and the worm 7 cooperates with the worm gear 6. The annular chain groove 3 is fixedly sleeved on the second rotating shaft 5, and a chain 8 is wound around the annular chain groove 3. The inner wall of the annular chain groove 3 has grooves that match the chain links of the chain 8, forming a precise interlocking structure that effectively prevents the chain 8 from slipping. A main gear 9 is fixedly mounted on shaft 4, and a driven gear 10 is fixedly mounted on shaft 5. The driven gear 10 meshes with the main gear 9. There are two sets of main gears 9 and two sets of driven gears 10. The two sets of main gears 9 are located on both sides of the worm gear 6, and the two sets of driven gears 10 are located on both sides of the annular chain groove 3. The worm 7 is connected to the output end of the power source. Under the drive of the power source, the worm 7 rotates, and the worm 7 drives the worm gear 6 to rotate. The worm gear 6 drives the main gear 9 on shaft 4 to rotate, and the main gear 9 drives the driven gear 10 to rotate, thereby synchronously driving the annular chain groove 3 on shaft 5 to rotate, completing the winding and unwinding action of the chain 8. The self-locking principle of the worm gear 6 and worm 7 is used to solve the problem of slippage of the brake pads in traditional chain reversing.

[0018] In practical use, driven by the power source, the worm 7 rotates, the worm 7 drives the worm wheel 6 to rotate, the worm wheel 6 drives the main gear 9 on the rotating shaft 4 to rotate, the main gear 9 drives the driven gear 10 to rotate, thereby synchronously driving the annular chain groove 3 on the rotating shaft 5 to rotate, completing the winding and unwinding action of the chain 8. When the power source stops, due to the unique self-locking characteristics of the worm wheel 6 and worm 7, the meshing relationship between the worm 7 and the worm wheel 6 instantly forms a mechanical lock.

[0019] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A chain hoist structure for preventing slippage, comprising a U-shaped bracket (1), a top frame (2), and an annular chain groove (3), wherein the top frame (2) is fixedly installed on the top of the U-shaped bracket (1), characterized in that: A rotating shaft 1 (4) and a rotating shaft 2 (5) are rotatably arranged between the opposite side walls of the U-shaped bracket (1). The rotating shaft 1 (4) and the rotating shaft 2 (5) are arranged parallel to each other vertically. A worm gear (6) is fixedly sleeved on the rotating shaft 1 (4). A worm (7) is rotatably arranged between the opposite side walls of the top frame (2). The worm gear (7) is engaged with the worm gear (6). An annular chain groove (3) is fixedly sleeved on the rotating shaft 2 (5). A chain (8) is wound on the annular chain groove (3). A main gear (9) is fixedly sleeved on the rotating shaft 1 (4). A driven gear (10) is fixedly sleeved on the rotating shaft 2 (5). The driven gear (10) meshes with the main gear (9).

2. The anti-slip chain hoist structure according to claim 1, characterized in that: The main gear (9) and the driven gear (10) are each provided in two sets. The two sets of main gears (9) are located on both sides of the worm gear (6), and the two sets of driven gears (10) are located on both sides of the annular chain groove (3).

3. The anti-slip chain hoist structure according to claim 1, characterized in that: The inner wall of the annular chain groove (3) is provided with a groove that matches the chain link of the chain (8).

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