CN106006434B - A kind of single drum four-point lifting lifting mechanism - Google Patents

Abstract

The present invention provides a kind of single drum four-point lifting lifting mechanism, including single drum, fixed pulley group I, fixed pulley group II and running block, four steel wire ropes are wound on single drum, the running block includes four groups of pulley blocks, the fixed pulley group I includes two fixed pulleys with fixed pulley group II, each fixed pulley and one group of pulley blocks form a pulley blocks, thereon around steel cable.The trolley of the present invention does not need to be mobile, you can by the weight of one group of up to a hundred tons of drum lifting, and does not have lifting mechanism on girder, can effectively mitigate steel construction weight, integral vehicle cost also can be reduced effectively.

Description

A single-drum four-point hoisting mechanism

technical field

The invention belongs to the technical field of large-tonnage cranes with fixed lifting points, and in particular relates to a lifting mechanism with four lifting points for a single drum.

Background technique

With the increasing investment in the construction of high-speed railways and expressways in my country, the demand for bridge erecting machines and beam lifting machines is increasing. Most of its equipment is a relatively large concrete beam with a lifting tonnage. The cost of the hoisting mechanism used in the prior art is relatively high, the weight of the mechanism is also heavy, and it is difficult to move.

When the trolley does not need to move, using this technology, a group of reels can lift hundreds of tons of heavy objects, achieving the effect of pulling a thousand catties in four or two. There is no hoisting mechanism on the main beam, which can effectively reduce the weight of the steel structure, and the cost of the whole vehicle can also be effectively reduced.

Contents of the invention

The technical problem to be solved by the present invention is to provide a lifting mechanism that can lift a weight of hundreds of tons by a group of reels when the trolley does not need to move.

The purpose of the present invention is achieved in the following manner:

A single-drum four-point hoisting mechanism, the lifting mechanism includes a single drum, fixed pulley block I, fixed pulley block II and a movable pulley block, four steel wire ropes are wound on a single drum, and the movable pulley block includes four sets of pulley blocks , the fixed pulley block I and the fixed pulley block II both include two fixed pulleys, and each fixed pulley and a set of pulley blocks form a pulley block, on which a steel wire rope is wound.

The single drum guides the wire ropes into the fixed pulley block I and the fixed pulley block II respectively through the guide pulley, and the guide pulley includes pulley I, pulley II, pulley III and pulley IV.

The single drum guides the wire rope into the fixed pulley block II through the balance pulley, and the balance pulley includes a balance pulley I and a balance pulley II.

The lifting mechanism is arranged at the end beam of the crane.

Compared with the prior art, the trolley of the present invention can lift hundreds of tons of heavy objects through a group of reels without moving, and there is no lifting mechanism on the main beam, which can effectively reduce the weight of the steel structure, and the cost of the whole vehicle can also be reduced. effective reduction.

Description of drawings

Fig. 1 is a wire rope winding diagram of the present invention.

Fig. 2 is a schematic front view of the hoisting mechanism of the present invention installed in a crane.

Figure 3 is a side view of Figure 2 of the present invention.

Among them, 1-moving pulley block; 2-fixed pulley block I, 3-fixed pulley block II, 4-single drum.

Detailed ways

The invention provides a single-drum four-point hoisting mechanism, which is mainly used in cranes. The hoisting mechanism is arranged at the end beam of the crane, which can effectively reduce the weight of the steel structure and effectively reduce the cost of the whole vehicle. The hoisting mechanism includes single drum 4, fixed pulley block I2, fixed pulley block II3 and movable pulley block 1, four steel wire ropes are wound on single drum 4, movable pulley block 1 includes four sets of pulley blocks, fixed pulley block I2 and fixed pulley block II3 both include two Each fixed pulley and a set of pulley blocks form a pulley block, on which a steel wire rope is wound.

The single drum 4 guides the wire rope into the directional pulley block I2 through the guide pulley. In the figure, pulley I21, pulley II22, pulley III31 and pulley IV32 are guide pulleys. Simultaneously, the single drum 4 introduces the wire rope into the fixed pulley block II3 through the balance pulley, and the balance pulley includes a balance pulley I51 and a balance pulley II52. The balance pulley is set in the fixed pulley block II, which can ensure the balance of the four-point hoisting and three-point. Because any three points can determine a plane, the balance pulley is set in the fixed pulley block II, and the movable pulley I11 and the movable pulley II12 can share a steel wire rope, which can be simplified as a lifting point. Another fixed pulley block 1 has no balance pulley, and the corresponding pulley block Simplified to 2 hanging points. Among the four lifting points, two lifting points can be regarded as one lifting point because of the balance pulley.

As shown in Figure 1, movable pulley block 1 includes movable pulley I11, movable pulley II12, movable pulley III13, and movable pulley IV14; fixed pulley block I2 includes fixed pulley I43 and fixed pulley II44; fixed pulley block II3 includes fixed pulley III41 and fixed pulley IV42; After passing the pulley III31, it bypasses the movable pulley I11, the fixed pulley III41 and the balance pulley I51, the steel wire rope II bypasses the pulley IV32, the movable pulley II12, the fixed pulley IV42 and the balance pulley II52, and the wire rope bypassing the balance pulley I51 and the balance pulley II52 is connected as One steel wire rope, that is, the steel wire rope I and the steel wire rope II can share one steel wire rope, which is simplified as one lifting point. Wire rope III bypasses pulley I21, movable pulley III13, fixed pulley I43, and wire rope IV bypasses pulley II22, movable pulley IV14, fixed pulley II44. The positions of the fixed pulley block I2 and the fixed pulley block II3 can be set according to the needs, which can be set in parallel or on the same straight line. It is necessary to ensure that the four wire ropes bypassing the fixed pulley and the pulley block do not intersect, so as to carry out normal lifting.

The present invention can satisfy the functions of four lifting points and three balances by arranging reasonable positions and winding modes of the fixed pulley block, and effectively reduces the cost of the crane.

What has been described above is only the preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, some changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the present invention. scope of protection.

Claims (2)

1. a kind of single drum four-point lifting lifting mechanism, it is characterised in that：The lifting mechanism includes single drum（4）, fixed pulley group I （2）, fixed pulley group II（3）And running block（1）, single drum（4）Four steel wire ropes of upper winding, the running block（1）Including Four groups of pulley blocks, the fixed pulley group I（2）With fixed pulley group II（3）Include two fixed pulleys, each fixed pulley and one group of cunning Wheel group forms a pulley blocks, thereon around steel cable；

The single drum（4）Steel wire rope is introduced by leading block by fixed pulley group I respectively（2）With fixed pulley group II（3）, it is described Leading block includes pulley I（21）, pulley II（22）, pulley III（31）With pulley IV（32）；

The single drum（4）Steel wire rope is introduced by fixed pulley group II by equalizer pulley（3）, the equalizer pulley, which includes balancing, to be slided Wheel I（51）With equalizer pulley II（52）；

Running block（1）Including movable pulley I（11）, movable pulley II（12）, movable pulley III（13）, movable pulley IV（14）, fixed pulley Group I（2）Including fixed pulley I（43）With fixed pulley II（44）, fixed pulley group II（3）Including fixed pulley III（41）With fixed pulley IV （42）, steel wire rope I is around pulley III（31）Afterwards, further around movable pulley I excessively（11）, fixed pulley III（41）With equalizer pulley I（51）, steel Cord II bypasses pulley IV（32）, movable pulley II（12）, fixed pulley IV（42）With equalizer pulley II（52）, around equalizer pulley I （51）With equalizer pulley II（52）Steel wire rope be connected as steel cable, be reduced to a suspension centre.

2. a kind of single drum four-point lifting lifting mechanism according to claim 1, it is characterised in that：The lifting mechanism setting At crane end carriage.