Large-tonnage high-lift double-drum lifting mechanism

Abstract

The present application relates to a kind of big tonnage high-lift double-drum hoisting mechanism, including drive assembly, single-connection double-layer winding drum group, wire rope, fixed pulley group, balance pulley group and hook pulley group;The single-connection double-layer winding drum group is symmetrically coaxially arranged;The drive assembly is respectively connected in the outer end of single-connection double-layer winding drum group;The hook pulley group is set below between two sides single-connection double-layer winding drum group;The fixed pulley group is respectively set in the inner end front of two sides single-connection double-layer winding drum group;The balance pulley group is respectively set in the outer end front of two sides fixed pulley group;Upper layer wire rope and lower layer wire rope on the single-connection double-layer winding drum group are simultaneously received and released, and received and released wire rope is sequentially wound through movable pulley on hook pulley group and fixed pulley group, and wire rope end is hung around on balance pulley.The present application is high in reliability, simple in structure, large in lifting weight and stroke, small in space occupation, and can realize the lightweight of mechanism as a whole.

Description

Technical Field

[0001] This invention relates to the field of crane lifting mechanism technology, and in particular to a large-tonnage, high-lift double-drum lifting mechanism. Background Technology

[0002] Large-tonnage bridge and gantry cranes play an indispensable role in the national economy, serving as pillar industries such as large-scale petrochemical equipment, transportation and logistics, large-scale water conservancy and hydropower construction, nuclear power construction, and shipbuilding.

[0003] The hoisting mechanism is the main component of a crane, performing the vertical lifting function of materials. Its movement is achieved through the coordinated operation of the hoisting drive mechanism, hoisting drum, wire rope winding system, and hoisting hook pulley block. Conventional large-tonnage gantry and bridge cranes typically employ a double-drum single-layer winding or a double-drum double-layer winding configuration for their hoisting mechanisms. To meet the requirements of large tonnage and high lift, the mechanism layout occupies a large space, has a heavy drum, and a small operating range, significantly impacting the mechanism's weight and the material lifting distance. The mechanism diagram is shown below. Figure 4-5 As shown, the wire rope winding system is as follows Figure 6 As shown. This type of lifting mechanism adopts a symmetrical arrangement of dual transmission mechanisms, which occupies a large space, and has a long transmission chain with many links and low efficiency. If one link fails, the entire mechanism will fail. In addition, the high-lift drum of this type of lifting mechanism is long, the dual drums are heavy, and the rope exit angle of the drum in the wire rope winding system is large, which poses a risk of wire rope derailment.

[0004] Therefore, inventing a new lifting mechanism that is highly reliable, simple in structure, has a long lifting stroke, occupies little space, and can achieve a light overall weight while lifting a large weight has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a high-tonnage, high-lift double-drum hoisting mechanism that overcomes the various drawbacks of traditional solutions, enabling the crane hoisting mechanism to be lightweight, durable, reliable, space-saving, with a large lifting stroke and a large lifting capacity.

[0006] The technical solution adopted in this invention is as follows:

[0007] The present invention proposes a high-tonnage, high-lift double-drum hoisting mechanism, comprising a drive assembly, a single-unit double-layer winding drum assembly, wire ropes, a fixed pulley assembly, a balance pulley assembly, and a hook pulley assembly. Two single-unit double-layer winding drum assemblies are provided, arranged symmetrically and coaxially. The drive assembly is connected to the outer ends of each single-unit double-layer winding drum assembly. The hook pulley assembly is located in the lower region between the two single-unit double-layer winding drum assemblies. The fixed pulley assemblies are located in front of the inner ends of each single-unit double-layer winding drum assembly. The balance pulley assemblies are located in front of the outer ends of each fixed pulley assembly. The upper and lower wire ropes on the single-unit double-layer winding drum assembly are simultaneously wound and released, and the wound and released wire ropes are sequentially wound through the movable pulley and fixed pulley assembly on the hook pulley assembly, with the ends of the wire ropes hooked onto the balance pulleys.

[0008] Furthermore, the drive assembly includes a motor, a full-tooth coupling, brake wheel I, brake wheel II, a reducer, an open-tooth pinion, and an open-tooth large gear; the open-tooth large gear is coaxially fixed to the outer end of the single-connected double-layer winding drum assembly; the output shaft of the motor is coaxially connected to brake wheel I through the full-tooth coupling; brake wheel I is connected to one end of the high-speed shaft of the reducer, and the other end of the high-speed shaft of the reducer is connected to brake wheel II; the open-tooth pinion is coaxially fixed to the low-speed shaft of the reducer, and the open-tooth pinion meshes with the open-tooth large gear.

[0009] Furthermore, a brake I is provided between the brake wheel I and the reducer; a brake II is provided between the brake wheel II and the reducer.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. The mechanism has a simple structure, occupies little space, is lightweight, and has low cost;

[0012] 2. Compact structure and high work efficiency;

[0013] 3. The double-layer wound drum assembly with double-outlet ropes on both the upper and lower layers has a larger winding capacity and a longer lifting stroke;

[0014] 4. The original double-link four-outlet rope drum model has been changed to two sets of single-link double-outlet rope models. The shortening of the length of the single (left or right) double-link drum body reduces the length of the area where the drum body is subject to bending moment. The forces on the left and right drum bodies are calculated separately, which can reduce the wall thickness of the drum body and reduce the weight of the drum assembly.

[0015] 5. The single (left or right) double-layer winding drum has a short body length and a small rope exit angle;

[0016] 6. The ends of the double-outlet wire ropes on the upper and lower layers are wound around the balance pulleys, which automatically level the wire ropes that are wound on the drum due to the difference in winding diameter, thus solving the problem of hoisting balance of the hook pulley block.

[0017] 7. The horizontal linear arrangement of the dual-drive mechanism reduces the space required for mechanism layout and lightens the weight of the mechanism support components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a top view of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the wire rope winding process in this invention;

[0021] Figure 4 This is a schematic diagram of the main structure of the existing hoisting mechanism;

[0022] Figure 5 This is a top view of the existing hoisting mechanism.

[0023] Figure 6 This is a schematic diagram of existing wire rope winding.

[0024] In the attached drawings, the following reference numerals are used: 1-Motor; 2-Full gear coupling; 3-Brake wheel I; 4-Brake I; 5-Brake II; 6-Brake wheel II; 7-Reducer; 8-Open gear pinion; 9-Open gear large gear; 10-Single-connected double-layer winding drum assembly; 11-Fixed pulley assembly; 12-Balance pulley assembly; 13-Wire rope; 14-Hook pulley assembly. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] It should be noted that in the description of this invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not mean that the device or element must have a specific orientation, or be constructed and operated in a specific orientation.

[0027] See appendix Figure 1-3This paper presents a specific structure of an embodiment of a high-tonnage, high-lift double-drum hoisting mechanism proposed in this invention. The mechanism includes a drive assembly, two single-connected double-layer winding drum assemblies 10, a wire rope 13, a fixed pulley assembly 11, a balance pulley assembly 12, and a hook pulley assembly 14. The single-layer double-winding drum assembly 10 consists of two sets, arranged symmetrically and coaxially. The drive components are respectively connected to the outer ends of the single-layer double-winding drum assemblies 10 on both sides. The hook pulley assembly 14 is located in the lower area between the single-layer double-winding drum assemblies 10 on both sides. The fixed pulley assembly 11 is respectively located in front of the inner ends of the single-layer double-winding drum assemblies 10 on both sides, and its rotation axis is parallel to the rotation axis of the single-layer double-winding drum assemblies 10. The balance pulley assembly 12 is respectively located in front of the outer ends of the fixed pulley assembly 11 on both sides, and its rotation axis is perpendicular to the rotation axis of the fixed pulley assembly 11. The upper wire rope 13 and the lower wire rope 13 on the single-layer double-winding drum assemblies 10 are wound and released simultaneously. The wound and released wire rope 13 is wound sequentially through the movable pulley and the fixed pulley assembly 11 on the hook pulley assembly 14, and the end of the wire rope 13 is hooked on the balance pulley 12.

[0028] Taking a one-sided drive assembly as an example, the drive assembly includes a motor 1, a full-tooth coupling 2, a brake wheel I3, a brake wheel II6, a reducer 7, an open-tooth pinion 8, and an open-tooth gear 9. The open-tooth gear 9 is coaxially fixed to the outer end of a single-connected double-layer winding drum assembly 10. The output shaft of the motor 1 is coaxially connected to the brake wheel I3 via the full-tooth coupling 2. The brake wheel I3 is connected to one end of the high-speed shaft of the reducer 7, and the other end of the high-speed shaft of the reducer 7 is connected to the brake wheel II6. The open-tooth pinion 8 is coaxially fixed to the low-speed shaft of the reducer 7, and the open-tooth pinion 8 meshes with the open-tooth gear 9.

[0029] In this embodiment, a brake I4 is provided between the brake wheel I3 and the reducer 7; a brake II5 is provided between the brake wheel II6 and the reducer 7, which serves to brake the mechanism.

[0030] The high-speed end of motor 1 outputs its speed and torque through the low-speed shaft end of reducer 7. The open-tooth pinion 8 at the low-speed end meshes with the open-tooth large gear 9 mounted on the single-unit double-layer winding drum assembly 10, causing the single-unit double-layer winding drum assembly 10 to rotate and thus wind the wire rope 13. The upper and lower layers of wire rope 13 on the single-unit double-layer winding drum assembly 10 are simultaneously wound and unwound. The wound and unwound wire rope 13 is wound sequentially through the movable pulley on the hook pulley assembly 14 and the fixed pulley assembly 11 on the frame. The end of the wire rope 13 is hooked onto the balance pulley 12, which automatically levels the wire rope winding system to prevent imbalance caused by the different diameters of the winding layers. The drive assembly on the other side has the same structure as described above and is symmetrically arranged. Two sets of single-link double-layer winding drums 10 simultaneously wind and unwind wire ropes 13, forming an integrated lifting mechanism that drives the lifting and lowering of the hook pulley block 14 to complete the material handling operation. The wire rope winding system is as follows: Figure 3 As shown.

[0031] All matters not covered in this invention are common knowledge.

[0032] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-tonnage, high-lift double-drum hoisting mechanism, characterized in that: The mechanism includes a drive assembly, a single-unit double-layer winding drum assembly, a wire rope, a fixed pulley assembly, a balance pulley assembly, and a hook pulley assembly. Two single-unit double-layer winding drum assemblies are provided, arranged symmetrically and coaxially. The drive assembly is connected to the outer ends of each single-unit double-layer winding drum assembly. The hook pulley assembly is located in the lower region between the two single-unit double-layer winding drum assemblies. The fixed pulley assemblies are located in front of the inner ends of each single-unit double-layer winding drum assembly. The balance pulley assemblies are located in front of the outer ends of each fixed pulley assembly. The upper and lower wire ropes on the single-unit double-layer winding drum assembly are simultaneously wound and unwound. The wound and unwound wire ropes are sequentially wound through the movable and fixed pulley assemblies on the hook pulley assembly, with the ends of the wire ropes hooked onto the balance pulleys. The drive assembly includes a motor, a full-tooth coupling, brake wheel I, brake wheel II, a reducer, an open-tooth pinion, and an open-tooth large gear; the open-tooth large gear is coaxially fixed to the outer end of a single-connected double-layer winding drum assembly; the output shaft of the motor is coaxially connected to brake wheel I via the full-tooth coupling; brake wheel I is connected to one end of the high-speed shaft of the reducer, and the other end of the high-speed shaft of the reducer is connected to brake wheel II; the open-tooth pinion is coaxially fixed to the low-speed shaft of the reducer, and the open-tooth pinion meshes with the open-tooth large gear.

2. The high-tonnage, high-lift double-drum hoisting mechanism according to claim 1, characterized in that: A brake I is provided between brake wheel I and the reducer; a brake II is provided between brake wheel II and the reducer.

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