CN118047321A - Pulley device, rope threading method of pulley device and working machine - Google Patents
Pulley device, rope threading method of pulley device and working machine Download PDFInfo
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- CN118047321A CN118047321A CN202410300872.3A CN202410300872A CN118047321A CN 118047321 A CN118047321 A CN 118047321A CN 202410300872 A CN202410300872 A CN 202410300872A CN 118047321 A CN118047321 A CN 118047321A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 238000004804 winding Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000008569 process Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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Abstract
The invention relates to the technical field of hoisting, in particular to a pulley device, a rope threading method of the pulley device and an operation machine, wherein the pulley device comprises a movable pulley block, a fixed pulley block and a steel wire rope, the movable pulley block comprises a movable pulley shaft and a plurality of movable pulleys, and the movable pulleys are sequentially and rotatably sleeved on the movable pulley shaft; the fixed pulley block comprises a fixed pulley shaft and a plurality of fixed pulleys, and the fixed pulleys are sequentially and rotatably sleeved on the fixed pulley shaft; the rope lifting end of the steel wire rope is wound on a fixed pulley close to the middle position, and the middle section of the steel wire rope is wound on the corresponding fixed pulley and the corresponding movable pulley. Through winding the rope lifting end of the steel wire rope on one fixed pulley close to the middle position, and winding the rope collecting end of the steel wire rope on the other fixed pulley close to the middle position, the force arm of the rope inlet side and the rope outlet side is reduced, the deflection degree of the movable pulley shaft reaches the minimum value, the lateral swing of the movable pulley block in the working process is effectively reduced, the lateral load of equipment is reduced, and the safety of the equipment is improved.
Description
Technical Field
The invention relates to the technical field of hoisting, in particular to a pulley device, a rope threading method of the pulley device and a working machine.
Background
The amplitude variation knapsack (pulley block) is an important component part of the crawler-type dynamic compactor, and for the amplitude variation knapsack, the design of the winding mode of the steel wire rope determines whether the inclination degree and the structural stress of the amplitude variation knapsack are reasonable to a great extent. At present, a vertical pulley block in the market is commonly used as a forward threading method, namely a simple threading method for winding a section of a steel wire rope on a fixed pulley and a movable pulley one by one in sequence, wherein the forward threading method comprises a single-tap forward threading method and a double-tap forward threading method, but the single-tap forward threading method or the double-tap forward threading method can arrange a rope lifting pulley and a rope collecting pulley at the outermost side in the threading process, the moment arm is longer, the inclination degree of a movable pulley shaft is larger, and the construction safety and stability are not facilitated.
Disclosure of Invention
The invention provides a pulley device which is used for solving the problem that a movable pulley is inclined due to unreasonable threading of the pulley device in the prior art.
The present invention provides a pulley device comprising:
the movable pulley block comprises a movable pulley shaft and a plurality of movable pulleys, and the movable pulleys are sequentially and rotatably sleeved on the movable pulley shaft;
the fixed pulley block comprises a fixed pulley shaft and a plurality of fixed pulleys, and the fixed pulleys are sequentially and rotatably sleeved on the fixed pulley shaft;
The rope winding end of the steel wire rope is wound on one fixed pulley close to the middle position, the middle section of the steel wire rope is wound on the corresponding fixed pulley and the corresponding movable pulley, the rope winding end of the steel wire rope is connected with the fixed pulley shaft, or the rope winding end of the steel wire rope is wound on the other fixed pulley close to the middle position and is connected with the hoisting mechanism.
According to the pulley device provided by the invention, the steel wire ropes on two sides of the fixed pulley at the center are symmetrically arranged.
According to the pulley device provided by the invention, the fixed pulley shaft and the movable pulley shaft are parallel to each other and are positioned in the same plane, and at least one section of the steel wire rope between the fixed pulley and the movable pulley passes through the plane.
According to the pulley device provided by the invention, the rope starting end of the steel wire rope is positioned at one side of the fixed pulley at the central position, and the rope receiving end of the steel wire rope is positioned at the other side of the fixed pulley at the central position.
According to the pulley device provided by the invention, under the condition that the rope receiving end of the steel wire rope is connected with the hoisting mechanism, the number of the steel wire rope sections of one side of the fixed pulley at the center position, which passes through the plane, is larger than that of the steel wire rope sections of the other side, which passes through the plane.
According to the pulley device provided by the invention, under the condition that the rope receiving end of the steel wire rope is connected with the hoisting mechanism, the number of the fixed pulleys is one more than that of the movable pulleys.
According to the pulley device provided by the invention, under the condition that the rope receiving end of the steel wire rope is connected with the fixed pulley shaft, the number of the fixed pulleys is equal to that of the movable pulleys.
The invention also provides a rope threading method of the pulley device, which is based on the pulley device, and comprises the following steps:
winding the rope lifting end of the steel wire rope on one fixed pulley close to the middle position;
Winding the middle section of the steel wire rope on the corresponding fixed pulley and the corresponding movable pulley;
And connecting the rope collecting end of the steel wire rope with the fixed pulley shaft, or winding the other fixed pulley near the middle position and connecting with a hoisting mechanism.
According to the rope threading method of the pulley device provided by the invention, the step of winding the middle section of the steel wire rope on the corresponding fixed pulley and the corresponding movable pulley comprises the following steps of:
Winding the middle section of the steel wire rope alternately around the fixed pulley and the movable pulley which are arranged on one side of the fixed pulley in the central position;
Winding the middle section of the steel wire rope around the fixed pulley at the central position;
and winding the steel wire rope wound around the fixed pulley at the central position alternately around the fixed pulley and the movable pulley at the other side of the fixed pulley at the central position.
The invention also provides a working machine which comprises a main arm, a vehicle body and the pulley device, wherein the vehicle body is connected with the fixed pulley shaft.
According to the pulley device provided by the invention, the rope lifting end of the steel wire rope is wound on one fixed pulley close to the middle position, and the rope receiving end of the steel wire rope is wound on the other fixed pulley close to the middle position, so that the force arm of the rope inlet side and the rope outlet side is reduced, the deflection degree of the movable pulley shaft reaches the minimum value, the lateral swing of the movable pulley block in the working process is effectively reduced, the side load of equipment is reduced, and the safety of the equipment is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a pulley device according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of a pulley device according to another embodiment of the present invention.
Reference numerals:
100. A movable pulley block; 110. a movable pulley shaft; 120. a movable pulley; 121. a first movable pulley; 122. a second movable pulley; 123. a third movable pulley; 124. a fourth movable pulley; 125. a fifth movable pulley; 126. a sixth movable pulley; 200. a fixed pulley block; 210. a fixed pulley shaft; 220. a fixed pulley; 221. a first fixed pulley; 222. a second fixed pulley; 223. a third fixed pulley; 224. a fourth fixed pulley; 225. a fifth fixed pulley; 226. a sixth fixed pulley; 227. a seventh fixed pulley; 300. a wire rope; 310. a rope lifting end; 320. a rope receiving end; 400. and a hoisting mechanism.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The specific structure of the pulley device of the present invention will be described below with reference to fig. 1 to 2.
As shown in fig. 1, the pulley device includes a movable pulley block 100, a fixed pulley block 200 and a wire rope 300, the movable pulley block 100 includes a movable pulley shaft 110 and a plurality of movable pulleys 120, and the movable pulleys 120 are rotatably sleeved on the movable pulley shaft 110 in sequence. The fixed pulley block 200 comprises a fixed pulley shaft 210 and a plurality of fixed pulleys 220, and the fixed pulleys 220 are sequentially and rotatably sleeved on the fixed pulley shaft 210; the rope starting end 310 of the steel wire rope 300 is wound around one fixed pulley 220 near the middle position, the middle section of the steel wire rope 300 is wound around the corresponding fixed pulley 220 and the movable pulley 120, the rope receiving end 320 of the steel wire rope 300 is connected with the fixed pulley shaft 210, or the rope receiving end 320 of the steel wire rope 300 is wound around the other fixed pulley 220 near the middle position and is connected with the hoisting mechanism 400.
According to the pulley device provided by the invention, the rope lifting end 310 of the steel wire rope 300 is wound on one fixed pulley 220 close to the middle position, and the rope receiving end 320 of the steel wire rope 300 is wound on the other fixed pulley 220 close to the middle position, so that the arm of force of the rope inlet side and the rope outlet side is reduced, the skew degree of the movable pulley shaft 110 reaches the minimum value, the lateral swing of the movable pulley block 100 in the working process is effectively reduced, the side load of equipment is reduced, and the safety of the equipment is improved.
In this embodiment, the hoisting mechanism 400 is a luffing hoisting mechanism, and of course, other types of hoisting mechanisms 400 are also possible.
The pulley device is used for amplitude variation (controlling the amplitude variation angle of the main arm), and the amplitude variation knapsack is inevitably swung/jumped greatly when the weight is dropped in construction due to the particularity of the dynamic compaction construction method, so that the reduction of the deflection degree of the amplitude variation knapsack is necessary for improving the construction safety, the lateral swing of the movable pulley block in the working process is effectively reduced, the side load of equipment is reduced, and the safety of the equipment is improved.
In one embodiment of the present invention, as shown in fig. 1, the movable pulley block 100 includes a first movable pulley 121, a second movable pulley 122, a third movable pulley 123, a fourth movable pulley 124, a fifth movable pulley 125, and a sixth movable pulley 126, and the first movable pulley 121, the second movable pulley 122, the third movable pulley 123, the fourth movable pulley 124, the fifth movable pulley 125, and the sixth movable pulley 126 are disposed at intervals along the length direction of the movable pulley shaft 110, the distances between two adjacent movable pulleys 120 are equal, and the outer diameters of the two adjacent movable pulleys 120 are also equal.
The fixed pulley block 200 comprises a first fixed pulley 221, a second fixed pulley 222, a third fixed pulley 223, a fourth fixed pulley 224, a fifth fixed pulley 225 and a sixth fixed pulley 226, wherein the first fixed pulley 221, the second fixed pulley 222, the third fixed pulley 223, the fourth fixed pulley 224, the fifth fixed pulley 225 and the sixth fixed pulley 226 are arranged at intervals along the length direction of the fixed pulley shaft 210, and the outer diameters of two adjacent movable pulleys 120 are equal. In the present embodiment, the fourth fixed pulley 224 is the fixed pulley 220 at the center position as described above, and the third fixed pulley 223 is the feeding fixed pulley 220, however, the feeding fixed pulley 220 is not limited to the third fixed pulley 223, and the second fixed pulley 222 or other fixed pulleys 220 may be used. The rope feeding pulley is limited by the position of the hoisting rope and the working angle of the steel wire rope 300, and the most suitable current rope feeding pulley position can be selected according to actual conditions.
The rope starting end 310 of the steel rope 300 in this embodiment is wound around the third fixed sheave 223. The intermediate section of the wire rope 300 enters the third movable sheave 123 from the front side and goes out of the third movable sheave 123 from the rear side, enters the second fixed sheave 222 from the rear side and goes out of the second fixed sheave 222 from the front side, enters the first movable sheave 121 from the front side and goes out of the first movable sheave 121 from the rear side, enters the first fixed sheave 221 from the front side and goes out of the first fixed sheave 221 from the rear side, enters the second movable sheave 122 from the rear side and goes out of the second movable sheave 122 from the front side, enters the fourth fixed sheave 224 from the rear side and goes out of the fourth fixed sheave 224 from the front side, enters the fifth movable sheave 125 from the rear side and goes out of the fifth movable sheave 125 from the front side, enters the sixth fixed sheave 226 from the front side and goes out of the sixth fixed sheave 226 from the rear side, enters the sixth movable sheave 126 from the front side and goes out of the sixth movable sheave 126 from the rear side, enters the fifth fixed sheave 225 from the rear side and goes out of the fifth fixed sheave 225 from the front side and goes out of the fourth movable sheave 124 from the front side. The rope receiving end 320 of the wire rope 300 is connected to the fixed pulley shaft 210 between the fourth fixed pulley 224 and the fifth fixed pulley 225.
The distance between the third fixed sheave 223 and the fourth fixed sheave 224 is denoted as N1, and the distance between the connection point of the rope receiving end 320 of the wire rope 300 and the fixed sheave shaft 210 and the fourth fixed sheave 224 is denoted as N2, n1=n2, i.e. the rope feeding side and the rope discharging side are symmetrical. Since the wire rope 300 enters the rope through the third fixed pulley 223 and exits through the fixed pulley shaft 210 between the fourth fixed pulley 224 and the fifth fixed pulley 225, the moment arm generated on the rope starting side and the rope exiting side of the wire rope 300 is the shortest, and the skew degree of the movable pulley shaft 110 reaches the minimum.
Here, the front side in the present invention is the side of the designated pulley 220 or the movable pulley 120 facing the observer, and the rear side is the side of the designated pulley 220 or the movable pulley 120 facing away from the observer.
In one embodiment of the present invention, as shown in fig. 1, the wire ropes 300 at both sides of the fixed pulley 220 at the center are symmetrically arranged. Specifically, the steel wire rope 300 on the left side of the fourth fixed pulley 224 and the steel wire rope 300 on the right side are symmetrically arranged, so that the rotation directions of two adjacent fixed pulleys 220 are opposite in the process that the steel wire rope 300 drives the fixed pulleys 220 to rotate; likewise, the wire rope 300 on the left side of the fourth fixed pulley 224 is symmetrically arranged with the wire rope 300 on the right side, so that the rotation directions of the two adjacent movable pulleys 120 are opposite, the torques generated by the two movable pulleys 120 are offset, and the skew degree of the movable pulley shaft 110 is further reduced. For example, when the wire rope 300 moves, the first movable pulley 121 rotates in a counterclockwise direction as viewed from the left to the right in fig. 1, and the second fixed pulley 222 rotates in a clockwise direction, and the torques generated during the rotation of the first fixed pulley 221 and the second fixed pulley 222 cancel each other out because the rotation directions of the first fixed pulley 221 and the second fixed pulley 222 are opposite, thereby further reducing the skew degree of the movable pulley shaft 110.
In one embodiment of the present invention, as shown in fig. 1, the fixed pulley shaft 210 and the movable pulley shaft 110 are parallel to each other and in the same plane, and at least one length of the wire rope 300 between the fixed pulley 220 and the movable pulley 120 passes through the plane. The winding mode of the steel wire rope 300 passing through the plane is referred to as an oblique winding mode, and the length of the steel wire rope 300 between the fixed pulley and the movable pulley can be increased by adopting the oblique winding mode, so that the weight of the steel wire rope 300 is increased, and the current situation that the stress at the two ends of the movable pulley shaft 110 is unbalanced is weakened.
Specifically, the wire rope 300 wound between the first fixed pulley 221 and the first movable pulley 121 passes through a plane, i.e., the wire rope L1 in fig. 1 passes through a plane; the wire rope 300 wound between the fourth fixed sheave 224 and the second movable sheave 122 passes through a plane, i.e., the wire rope L2 in fig. 1 passes through a plane; the wire rope 300 wound between the fourth fixed sheave 224 and the fifth movable sheave 125 passes through a plane, i.e., the wire rope L3 in fig. 1 passes through a plane; the wire rope 300 wound between the sixth fixed pulley 226 and the sixth movable pulley 126 passes through a plane, i.e., the wire rope L4 in fig. 1 passes through a plane; because the four sections of the steel wire ropes 300 are symmetrically arranged in an oblique winding manner, the force arm generated in the process that the steel wire ropes 300 drive the movable pulley 120 to rotate can be further reduced, and the skew degree of the movable pulley shaft 110 is further reduced.
In one embodiment of the present invention, as shown in fig. 1, the rope start end 310 of the wire rope 300 is located at one side of the fixed pulley 220 at the center position, and the rope take-up end 320 of the wire rope 300 is located at the other side of the fixed pulley 220 at the center position. Specifically, the rope-feeding end of the wire rope 300 is located at the left side of the fourth fixed sheave 224, and the rope-collecting end 320 of the wire rope 300 is located at the right side of the fourth fixed sheave 224.
In one embodiment of the present invention, as shown in fig. 1, in the case where the rope receiving end 320 of the wire rope 300 is connected to the fixed sheave shaft 210, the number of fixed sheaves 220 is equal to the number of movable sheaves 120. In this embodiment, six fixed pulleys 220 are provided, and six movable pulleys 120 are provided. Of course, the number of fixed pulleys 220 and the number of movable pulleys 120 are not limited thereto, and seven, eight or more may be provided, specifically determined according to actual needs.
In another embodiment of the present invention, as shown in fig. 2, in the case where the rope receiving end 320 of the wire rope 300 is connected to the winding mechanism 400, the number of the fixed pulleys 220 is one more than the number of the movable pulleys 120.
The movable pulley block 100 in this embodiment includes a first movable pulley 121, a second movable pulley 122, a third movable pulley 123, a fourth movable pulley 124, a fifth movable pulley 125 and a sixth movable pulley 126, where the first movable pulley 121, the second movable pulley 122, the third movable pulley 123, the fourth movable pulley 124, the fifth movable pulley 125 and the sixth movable pulley 126 are arranged at intervals along the length direction of the movable pulley shaft 110, the distances between two adjacent movable pulleys 120 are equal, and the outer diameters of two adjacent movable pulleys 120 are equal.
The fixed pulley block 200 includes a first fixed pulley 221, a second fixed pulley 222, a third fixed pulley 223, a fourth fixed pulley 224, a fifth fixed pulley 225, a sixth fixed pulley 226, and a seventh fixed pulley 227, the fourth fixed pulley 224 in this embodiment being a fixed pulley 220 in a central position, the first fixed pulley 221 and the seventh fixed pulley 227 being symmetrically arranged about the fourth fixed pulley 224, the second fixed pulley 222 and the sixth fixed pulley 226 being symmetrically arranged about the fourth fixed pulley 224, the third fixed pulley 223 and the fifth fixed pulley 225 being symmetrically arranged about the fourth fixed pulley 224.
In another embodiment of the present invention, in the case where the rope receiving end 320 of the wire rope 300 is connected to the winding mechanism 400, the number of wire rope 300 segments passing through the plane at one side of the fixed pulley 220 at the center position is greater than the number of wire rope 300 segments passing through the plane at the other side of the fixed pulley 220 at the center position. Specifically, the number of the wire rope 300 passing through the plane on one side of the fixed pulley 220 at the center position of the present embodiment is one more than the number of the wire rope 300 passing through the plane on the other side of the fixed pulley 220 at the center position.
As shown in fig. 2, the wire rope 300 wound between the first fixed pulley 221 and the first movable pulley 121 passes through a plane, i.e., the wire rope L1 in fig. 2 passes through a plane; the wire rope 300 wound between the fourth fixed sheave 224 and the second movable sheave 122 passes through a plane, that is, the wire rope L2 in fig. 2 passes through a plane, so that the two wire ropes 300 provided on the left side of the fourth fixed sheave 224 are inclined. The wire rope 300 wound between the sixth fixed pulley 226 and the fifth movable pulley 125 passes through a plane, that is, the wire rope L5 in fig. 2 passes through a plane, so that the wire rope 300 having a section on the right side of the fourth fixed slide adopts an oblique winding manner.
Compared to the above embodiment, in the present embodiment, the rope receiving end 320 is connected to the hoisting mechanism 400, the rope receiving end 320 must enter the fourth fixed pulley 224 through the front side, and if the winding method symmetrical to the above embodiment is adopted, the wire ropes 300 on the left side of the fourth fixed pulley 224 are easy to interfere with each other, so that the local symmetrical winding method is adopted in the present embodiment, and the number of the wire rope portions passing through the plane on the left side of the fourth fixed pulley 224 is one more than the number of the wire rope portions passing through the plane on the right side of the fourth fixed pulley 224, so as to increase the weight of the left end of the movable pulley shaft 110 (the current winding method is all inclined to the right side, so that the weight of the left side needs to be increased), so that the forces on the left end and the right end of the movable pulley shaft 110 are balanced, and the skew degree of the movable pulley shaft 110 is further reduced.
In another embodiment of the invention, the rope start 310 of the wire rope 300 is wound around the third fixed sheave 223. The intermediate section of the wire rope 300 enters the third movable sheave 123 from the front side and goes out of the third movable sheave 123 from the rear side, enters the second fixed sheave 222 from the rear side and goes out of the second fixed sheave 222 from the front side, enters the first movable sheave 121 from the front side and goes out of the first movable sheave 121 from the rear side, enters the first fixed sheave 221 from the front side and goes out of the first fixed sheave 221 from the rear side, enters the second movable sheave 122 from the rear side and goes out of the second movable sheave 122 from the front side, enters the fourth fixed sheave 224 from the rear side and goes out of the fourth fixed sheave 224 from the front side, enters the fourth movable sheave 124 from the front side and goes out of the fourth fixed sheave 124 from the rear side, goes into the sixth fixed sheave 226 from the rear side and goes out of the sixth fixed sheave 226 from the front side, enters the sixth movable sheave 126 from the front side and goes out of the sixth movable sheave 126 from the rear side, enters the seventh fixed sheave 227 from the rear side and goes out of the seventh fixed sheave 227 from the front side and goes out of the fifth movable sheave 125 from the front side. The rope receiving end 320 of the wire rope 300 is wound out from the front side of the fifth fixed sheave 225 and connected to the winding mechanism 400.
The second aspect of the present invention also provides a rope threading method of a pulley device, the method being based on the pulley device according to any one of the above embodiments, the rope threading method of a pulley device comprising:
Step 100, winding a rope starting end 310 of a steel wire rope 300 on a fixed pulley 220 close to the middle position;
Step 200, winding the middle section of the steel wire rope 300 around the corresponding fixed pulley 220 and movable pulley 120;
Step 300, connecting the rope receiving end 320 of the wire rope 300 with the fixed shaft or winding another fixed pulley 220 near the middle position and connecting with the winding mechanism 400.
In one embodiment of the present invention, as shown in fig. 1, the step of winding the middle section of the wire rope 300 around the corresponding fixed pulley 220 and movable pulley 120 includes:
Step 210, winding the middle section of the steel wire rope 300 alternately around the fixed pulley 220 and the movable pulley 120 on one side of the fixed pulley 220 at the central position;
Here, the alternate winding means that the previous winding object is different from the next winding object, that is, the previous winding object is the fixed pulley 220, the next winding object is the movable pulley 120, or the previous winding object is the movable pulley 120, and the next winding object is the fixed pulley 220. In the alternate winding mode, the next winding object and the previous winding object do not necessarily have a one-to-one correspondence, that is, when the previous winding object is the fourth fixed sheave 224, the next winding object does not necessarily have to be the fourth movable sheave 124, and may be the sixth movable sheave 126 or the second movable sheave 122. The rope feeding pulley is limited by the position of the hoisting rope and the working angle of the steel wire rope 300, and the most suitable current rope feeding pulley position can be selected according to actual conditions, but the rope feeding pulley is close to the middle position as much as possible, so that the moment arm is the shortest.
For example, in one embodiment, as shown in fig. 1, the intermediate section of the wire rope 300 enters the third traveling block 123 from the front side and winds out of the third traveling block 123 from the rear side, enters the second fixed block 222 from the rear side and winds out of the second fixed block 222 from the front side, enters the first traveling block 121 from the front side and winds out of the first traveling block 121 from the rear side, enters the first fixed block 221 from the front side and winds out of the first fixed block 221 from the rear side, enters the second traveling block 122 from the rear side and winds out of the second traveling block 122 from the front side.
For example, in another embodiment, as shown in fig. 2, the intermediate section of the wire rope 300 enters the third movable sheave 123 from the front side and winds out of the third movable sheave 123 from the rear side, enters the second fixed sheave 222 from the rear side and winds out of the second fixed sheave 222 from the front side, enters the first movable sheave 121 from the front side and winds out of the first movable sheave 121 from the rear side, enters the first fixed sheave 221 from the front side and winds out of the first fixed sheave 221 from the rear side, enters the second movable sheave 122 from the rear side and winds out of the second movable sheave 122 from the front side.
Step 220, winding the middle section of the steel wire rope 300 around a fixed pulley 220 arranged at the central position;
step 230, winding the wire rope 300 around the fixed pulley 220 at the center position alternately around the fixed pulley 220 and the movable pulley 120 at the other side of the fixed pulley 220 at the center position.
The alternate windings are the same as those in the above embodiment and will not be explained in detail here.
For example, in one embodiment, as shown in fig. 1, the intermediate section of the wire 300 passes around the center fixed pulley 220 (i.e., the fourth fixed pulley 224), then enters the fifth fixed pulley 125 from the rear side and passes around the fifth fixed pulley 125 from the front side, then enters the sixth fixed pulley 226 from the front side and passes around the sixth fixed pulley 226 from the rear side, then enters the sixth movable pulley 126 from the front side and passes around the sixth movable pulley 126 from the rear side, then enters the fifth fixed pulley 225 from the rear side and passes around the fifth fixed pulley 225 from the front side, then enters the fourth movable pulley 124 from the front side and passes around the fourth movable pulley 124 from the rear side.
For example, in another embodiment, as shown in fig. 2, the intermediate section of the wire rope 300 passes around the fixed sheave 220 at the center position, then enters the fourth fixed sheave 224 from the rear side and passes out of the fourth fixed sheave 224 from the front side, then enters the fourth movable sheave 124 from the front side and passes out of the fourth movable sheave 124 from the rear side, then enters the sixth fixed sheave 226 from the rear side and passes out of the sixth fixed sheave 226 from the front side, then enters the sixth movable sheave 126 from the front side and passes out of the sixth movable sheave 126 from the rear side, then enters the seventh fixed sheave 227 from the rear side and passes out of the seventh fixed sheave 227 from the front side, then enters the fifth movable sheave 125 from the rear side and passes out of the fifth movable sheave 125 from the front side.
A third aspect of the present invention also provides a work machine comprising a main arm, a body, and a pulley arrangement according to any of the above embodiments, the body being connected to a fixed pulley shaft 210.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A pulley device, comprising:
The movable pulley block (100) comprises a movable pulley shaft (110) and a plurality of movable pulleys (120), and the movable pulleys (120) are sequentially and rotatably sleeved on the movable pulley shaft (110);
The fixed pulley block (200) comprises a fixed pulley shaft (210) and a plurality of fixed pulleys (220), and the fixed pulleys (220) are sequentially and rotatably sleeved on the fixed pulley shaft (210);
The steel wire rope (300), the play rope end (310) of steel wire rope (300) is around locating one fixed pulley (220) near intermediate position, the intermediate section of steel wire rope (300) is around locating corresponding fixed pulley (220) with movable pulley (120), the receipts rope end (320) of steel wire rope (300) with fixed pulley axle (210) are connected, perhaps the receipts rope end (320) of steel wire rope (300) is around locating another fixed pulley (220) near intermediate position to be connected with hoist mechanism (400).
2. Pulley arrangement according to claim 1, characterized in that the wire ropes (300) on both sides of the fixed pulley (220) in the central position are arranged symmetrically.
3. Pulley arrangement according to claim 1, characterized in that the fixed pulley shaft (210) and the movable pulley shaft (110) are parallel to each other and in the same plane, through which plane at least one segment of the wire rope (300) between the fixed pulley (220) and the movable pulley (120) passes.
4. A pulley arrangement according to claim 3, characterized in that the hoisting end (310) of the wire rope (300) is located on one side of the fixed pulley (220) in a central position, and the rope receiving end (320) of the wire rope (300) is located on the other side of the fixed pulley (220) in a central position.
5. Pulley arrangement according to claim 3 or 4, characterized in that the number of segments of the wire rope (300) passing through the plane on one side of the fixed pulley (220) in the centre position is larger than the number of segments of the wire rope (300) passing through the plane on the other side, with the rope receiving end (320) of the wire rope (300) connected to the hoisting mechanism (400).
6. The pulley arrangement according to any one of claims 1-4, characterized in that the number of fixed pulleys (220) is one more than the number of movable pulleys (120) in case the rope receiving end (320) of the wire rope (300) is connected to the hoisting mechanism (400).
7. Pulley arrangement according to any one of claims 1 to 4, characterized in that the number of fixed pulleys (220) is equal to the number of movable pulleys (120) in case the rope receiving end (320) of the wire rope (300) is connected to the fixed pulley shaft (210).
8. A rope threading method of a pulley arrangement, which method is based on a pulley arrangement according to any one of claims 1 to 7, characterized in that it comprises:
Winding a rope starting end (310) of the steel wire rope (300) on one fixed pulley (220) close to the middle position;
Winding the middle section of the steel wire rope (300) around the corresponding fixed pulley (220) and the corresponding movable pulley (120);
The rope receiving end (320) of the steel wire rope (300) is connected with the fixed pulley shaft (210) or wound around the other fixed pulley (220) near the middle position and connected with the hoisting mechanism (400).
9. The rope threading method of a pulley arrangement according to claim 8, wherein the step of winding the intermediate section of the wire rope (300) around the corresponding fixed pulley (220) and movable pulley (120) comprises:
Winding the middle section of the steel wire rope (300) alternately around the fixed pulley (220) and the movable pulley (120) on one side of the fixed pulley (220) at a central position;
winding the middle section of the steel wire rope (300) around the fixed pulley (220) at the central position;
the wire rope (300) after winding the fixed pulley (220) at the center is alternately wound around the fixed pulley (220) and the movable pulley (120) at the other side of the fixed pulley (220) at the center.
10. A working machine comprising a main arm, a body and a pulley device according to any one of claims 1 to 7, said body being connected to a fixed pulley shaft (210).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410300872.3A CN118047321A (en) | 2024-03-15 | 2024-03-15 | Pulley device, rope threading method of pulley device and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410300872.3A CN118047321A (en) | 2024-03-15 | 2024-03-15 | Pulley device, rope threading method of pulley device and working machine |
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| Publication Number | Publication Date |
|---|---|
| CN118047321A true CN118047321A (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410300872.3A Pending CN118047321A (en) | 2024-03-15 | 2024-03-15 | Pulley device, rope threading method of pulley device and working machine |
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| Country | Link |
|---|---|
| CN (1) | CN118047321A (en) |
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