CN111908359B - Lifting rope winding system - Google Patents
Lifting rope winding system Download PDFInfo
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- CN111908359B CN111908359B CN202010921660.9A CN202010921660A CN111908359B CN 111908359 B CN111908359 B CN 111908359B CN 202010921660 A CN202010921660 A CN 202010921660A CN 111908359 B CN111908359 B CN 111908359B
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- 238000004804 winding Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 abstract description 28
- 239000010959 steel Substances 0.000 abstract description 28
- 238000005452 bending Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention discloses a lifting rope winding system which comprises a winding drum, a pulley block, a first rope, a second rope, a third rope and a fourth rope, wherein one end of the first rope, the second rope, the third rope and the fourth rope are fixed on the winding drum and pass through the pulley block, one ends of the second rope and the fourth rope are connected to the winding drum, the other ends of the second rope and the fourth rope are respectively connected to two ends of a rotary rocker arm, the pulley block comprises four upper frame pulleys fixed on an upper frame of a lifting appliance, the first rope passes through the first upper frame pulley, the second rope passes through the second upper frame pulley, the third rope passes through the third upper frame pulley, the fourth rope passes through the fourth upper frame pulley, and the lifting appliance is characterized in that the second upper frame pulley and the fourth upper frame pulley are arranged along the diagonal line of the upper frame of the lifting appliance, and the first rope and the fourth rope pass through the first upper frame pulley and the fourth upper frame pulley from outside to inside after the rope is discharged from the winding drum. The invention can reduce the bending times of the steel wire rope and prolong the service life of the steel wire rope.
Description
Technical Field
The invention relates to the field of lifting systems of cranes, in particular to a lifting rope winding system.
Background
Tyre type gantry container cranes are mostly of the traditional four-rope winding trolley type. The lifting system and the winding system of the machine are simple in layout and good in overall economy.
In the existing hoisting rope winding system of the crane, a structure design that two groups of steel wire ropes are symmetrical in center is generally adopted. Fig. 1 discloses a wire rope winding system comprising a drum 10, a wire rope set, an upper frame pulley block, a guide pulley block and a spreader upper frame 50. The upper frame pulley block comprises a second upper frame pulley 32 and a third upper frame pulley 33 on the left side of the spreader upper frame 50 in the figure, and a first upper frame pulley 31 and a fourth upper frame pulley 34 on the right side of the spreader upper frame 50. The wire rope group includes four wire ropes, and the one end of every wire rope is fixed on reel 10, and the other end of first rope 21 and second rope 22 is connected in the both ends of gyration rocking arm 60, and the other end of third rope 23 and fourth rope 24 is connected on the dolly. Wherein the second rope 22 and the third rope 23 are reeled from the reel 10 between the second upper frame pulley 32 and the third upper frame pulley 33 from inside to outside. In order to keep the spreader upper frame 50 balanced in the horizontal plane, it is necessary to pass the first rope 21 and the fourth rope 24 around the upper frame pulleys as well from inside to outside, so that the first rope 21 is led between the first upper frame pulley 31 and the fourth upper frame pulley 34 via the horizontal guide pulley 4A and the vertical guide pulley 4B, and the fourth rope 24 via the horizontal guide pulley 4C and the vertical guide pulley 4D.
The above-mentioned hoisting rope winding system finds that the life of the wire rope is to be improved in use.
Disclosure of Invention
The invention aims to solve the problem of service life reduction of a steel wire rope of a lifting system. The invention provides a lifting rope winding system which can prolong the service life of a steel wire rope of the lifting system.
In order to solve the technical problems, the embodiment of the invention discloses a lifting rope winding system which comprises a winding drum, a pulley block, a first rope, a second rope, a third rope and a fourth rope, wherein one end of the first rope, the second rope, the third rope and the fourth rope are fixed on the winding drum and wound around the pulley block, one ends of the second rope and the fourth rope are connected to the winding drum, the other ends of the second rope and the fourth rope are respectively connected to two ends of a rotary rocker arm, the pulley block comprises four upper frame pulleys fixed on a lifting appliance upper frame, the first rope winds around the first upper frame pulley, the second rope winds around the second upper frame pulley, the third rope winds around the third upper frame pulley, and the fourth rope winds around the fourth upper frame pulley.
Optionally, the first upper frame pulley and the third upper frame pulley are disposed along a diagonal of the spreader upper frame.
Optionally, the second rope and the third rope are reeled from inside to outside through the second upper frame pulley and the third upper frame pulley after being reeled out from the reel.
Optionally, the difference between any two equivalent resultant force angles among the equivalent resultant force angle generated by the first rope to the first upper frame pulley, the equivalent resultant force angle generated by the second rope to the second upper frame pulley, the equivalent resultant force angle generated by the third rope to the third upper frame pulley and the equivalent resultant force angle generated by the fourth rope to the fourth upper frame pulley is not more than 0.5 °.
Optionally, the equivalent resultant force angle produced by the first rope to the first upper frame pulley and the equivalent resultant force angle produced by the fourth rope to the fourth upper frame pulley are different in magnitude by not more than 0.1 °.
Optionally, the equivalent resultant force angle produced by the second rope to the second upper frame pulley and the equivalent resultant force angle produced by the third rope to the third upper frame pulley are different in magnitude by not more than 0.1 °.
Optionally, the pulley block further comprises a first vertical guide pulley, a second vertical guide pulley, a third vertical guide pulley, a fourth vertical guide pulley, a fifth vertical guide pulley and a first horizontal guide pulley, and the first rope sequentially winds around the first vertical guide pulley and the first upper frame pulley; the second rope sequentially winds the second upper frame pulley, the second vertical guide pulley and the third vertical guide pulley; the third rope is wound around a third upper frame pulley; the fourth rope sequentially winds the fourth vertical guide pulley, the fourth upper frame pulley, the fifth vertical guide pulley and the first horizontal guide pulley.
According to the lifting rope winding system provided by the invention, the winding modes of the steel wire ropes at the left end and the right end of the upper frame of the lifting appliance can be designed into an asymmetric structure, and the two steel wire ropes at the outer side of the winding drum can be wound from the outer side of the upper frame pulley to the inner side after being discharged from the winding drum, so that the two steel wire ropes are not required to be guided between the upper frame pulleys and then wound on the upper frame pulley from inside to outside, the bending times of the steel wire ropes are reduced, and the service life of the steel wire ropes can be prolonged.
Drawings
Fig. 1 shows a schematic structural view of a prior art hoisting rope winding system.
Fig. 2 is a schematic structural diagram of a hoisting rope winding system according to an embodiment of the present invention.
Fig. 3 illustrates an isometric view of a hoist rope winding system provided in an embodiment of the present invention.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
The terms "first," "second," "third," "fourth," "fifth," and the like are used solely for distinguishing between descriptions and not as an indication or suggestion of relative importance.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a lifting rope winding system according to an embodiment of the invention. The embodiment of the invention provides a lifting rope winding system, which comprises a winding drum 10, a pulley block, and a first rope 21, a second rope 22, a third rope 23 and a fourth rope 24, wherein one end of the first rope 21, the second rope 22, the third rope 23 and the fourth rope 24 are fixed on the winding drum 10 and are wound around the pulley block. Wherein, one end of the first rope 21 and one end of the third rope 23 are connected to the winding drum 10, and the other end of the first rope and the third rope are connected to a trolley frame (not shown); one end of the second rope 22 is connected to the spool 10, and the other end is connected to the upper end of the rotary rocker arm 60; one end of the fourth rope 24 is connected to the spool 10, and the other end is connected to the lower end of the swing arm 60.
The pulley block comprises a movable pulley block and a fixed pulley block, wherein the movable pulley block comprises four upper frame pulleys fixed on the upper frame 50 of the lifting appliance, the upper frame 50 of the lifting appliance is of a rectangular structure, the first upper frame pulley 31 and the fourth upper frame pulley 34 are respectively positioned on the left short side of the upper frame 50 of the lifting appliance, and the second upper frame pulley 32 and the third upper frame pulley 33 are respectively positioned on the right short side of the upper frame 50 of the lifting appliance. Note that "left" and "right" in the present embodiment refer to "left" and "right" when the upper frame pulleys are placed at the angles shown in fig. 2. I.e. the first upper frame pulley 31, the fourth upper frame pulley 34 are located to the left of the spreader upper frame 50, and the second upper frame pulley 32 and the third upper frame pulley 33 are located to the right of the spreader upper frame 50. This refers only to the relative position and does not mean that it must be placed at the angle shown in fig. 2. Specifically, the first rope 21 is wound around the first upper frame pulley 31, the second rope 22 is wound around the second upper frame pulley 32, the third rope 23 is wound around the third upper frame pulley 33, and the fourth rope 24 is wound around the fourth upper frame pulley 34. More specifically, the second upper frame pulley 32 and the fourth upper frame pulley 34 are disposed along a diagonal line of the spreader upper frame 50, and the first upper frame pulley 31 and the third upper frame pulley 33 are disposed along another diagonal line of the spreader upper frame 50. It should be noted that although the movable pulley block is shown in fig. 2 as being fixed to the hanger upper frame 50, the present invention is not limited thereto, and the movable pulley block may be fixed to the hanger without the hanger upper frame so as to reduce weight and save space for conveniently arranging other devices.
In the present embodiment, one end of the second rope 22 that passes around the second upper frame pulley 32 and one end of the fourth rope 24 that passes around the fourth upper frame pulley 34 are connected to both ends of the swing arm 60, respectively, and the swing arm 60 is used to adjust the swing angle of the spreader upper frame 50 in the horizontal plane, and since the second upper frame pulley 32 and the fourth upper frame pulley 34 are disposed diagonally, the positions of the second upper frame pulley 32 and the fourth upper frame pulley 34, that is, the positions of two points on the diagonal of the spreader upper frame 50, are adjusted by adjusting the second rope 22 and the fourth rope 24 when the swing angle of the spreader upper frame 50 is adjusted. The center of gravity of the spreader upper frame 50 is maintained substantially at a diagonally intermediate position during the adjustment process, thereby facilitating alignment of the spreader upper frame 50 with the container, and enabling the spreader to be secured parallel to the top of the container, improving loading and unloading efficiency.
Specifically, the first rope 21 and the fourth rope 24 are wound around the first upper frame pulley 31 and the fourth upper frame pulley 34 from the outside to the inside, respectively. Wherein the outside-in fingers are wound around the opposite side of the first upper frame pulley 31 and the fourth upper frame pulley 34 from the opposite side of the first upper frame pulley 31 and the fourth upper frame pulley 34. More specifically, the second and third ropes 22 and 23 are reeled from the reel 10 directly downward and outward around the second and third upper frame pulleys 32 and 33, respectively. Wherein the inward-outward direction is from the opposite side of the second upper frame pulley 32 and the third upper frame pulley 33 to the opposite side of the second upper frame pulley 32 and the third upper frame pulley 33. In the present embodiment, the first rope 21 and the fourth rope 24 are in the rope grooves on the outside of the spool 10, the second rope 22 and the third rope 23 are in the rope grooves on the inside of the spool 10, and the second upper frame pulley 32 and the third upper frame pulley 33 are located below the spool 10. The two wires outside the drum 10, the first rope 21 and the fourth rope 24, can be wound from the outside to the inside of the upper frame pulley without the need to first guide the wires between the first upper frame pulley 31 and the fourth upper frame pulley 34 in a manner of winding symmetrically around the second upper frame pulley 32 and the third upper frame pulley 33 as in the prior art. Therefore, the number of times of bending the first rope 21 and the fourth rope 24 is reduced, and the service life of the wire rope is improved.
Referring to fig. 3, fig. 3 is an isometric view of a lifting rope winding system according to an embodiment of the present invention. The included angle between the resultant force F 1 generated by the first rope 21 passing around the first upper frame pulley 31 and the vertical direction Z is an equivalent resultant force angle θ 1, the included angle between the resultant force F 2 generated by the second rope 22 passing around the second upper frame pulley 32 and the vertical direction Z is an equivalent resultant force angle θ 2, the included angle between the resultant force F 3 generated by the third rope 31 passing around the third upper frame pulley 33 and the vertical direction Z is an equivalent resultant force angle θ 3, and the included angle between the resultant force F 4 generated by the fourth rope 24 passing around the fourth upper frame pulley 34 and the vertical direction Z is an equivalent resultant force angle θ 4, and any two equivalent resultant force angles differ by not more than 0.5 °.
Specifically, the same side equivalent resultant force angles differ by no more than 0.1 °. That is, the equivalent resultant force angle θ 1 produced by the first rope 21 to the first upper frame pulley 31 and the equivalent resultant force angle θ 4 produced by the fourth rope 24 to the fourth upper frame pulley 34 differ by not more than 0.1 °. The equivalent resultant force angle theta 2 produced by the second rope 22 to the second upper frame pulley 32 and the equivalent resultant force angle theta 3 produced by the third rope 23 to the third upper frame pulley 33 differ by not more than 0.1 deg..
In this embodiment the position shown in fig. 3 is a side view of the winding of the wire rope with the spreader upper frame 50 at the highest point. At this position, the equivalent resultant force angle θ 1 produced by the resultant force F 1 is-10.78 °, the equivalent resultant force angle θ 4 produced by the resultant force F 4 is 10.72 °, and the magnitudes of the two equivalent resultant force angles differ by 0.06 °. The resultant forces F 1 and F 4 are decomposed into a component in the horizontal direction X and a component in the vertical direction Z, and the equivalent resultant force angle generated by the resultant forces F 1 and F 4 is very small, but only 0.06 °, and the force acting on the wire rope is very large, and after the force is decomposed, the component forces of the resultant forces F 1 and F 4 in the horizontal direction X are substantially equal in magnitude and opposite in direction, so that the component forces in the horizontal direction X are very small in difference. However, by the gravity of the container being lifted, the differences in the components of force in the horizontal direction X naturally balance each other, leaving only the component of force in the vertical direction Z to lift the spreader upper 50, so that the spreader upper 50 can be stabilized in the balanced position, preventing uncontrolled swinging thereof in the horizontal plane XY. Similarly, the equivalent resultant force angle generated by the resultant force F 2 is theta 2 to be-10.42 degrees, the equivalent resultant force angle generated by the resultant force F 3 is theta 3 to be 10.35 degrees, the magnitude of the equivalent resultant force angle is only 0.07 degrees, and the component forces of the resultant force F 2 and the resultant force F 3 in the horizontal direction X can be naturally balanced, so that the uncontrolled swing of the upper hanger frame 50 in the horizontal plane XY is prevented. As the height of the upper frame 50 of the lifting appliance descends, the angle of separation of the steel wire rope is smaller and smaller after the steel wire rope bypasses the upper frame pulley, and the generated equivalent resultant force angle is smaller and smaller, and the phase difference of the equivalent resultant force angle is smaller and smaller, so that the component force in the horizontal direction X can be naturally balanced in the lifting process of the upper frame 50 of the lifting appliance, the upper frame 50 of the lifting appliance can be stabilized at the balance position, the uncontrolled swing of the upper frame 50 of the lifting appliance in the horizontal plane XY is prevented, and the controllable posture of the upper frame 50 of the lifting appliance is ensured.
Specifically, the pulley block further comprises a fixed pulley block, which is mounted on the trolley frame and used as a guide pulley, and comprises a first vertical guide pulley 41, a second vertical guide pulley 42, a third vertical guide pulley 43, a fourth vertical guide pulley 44, a fifth vertical guide pulley 45 and a first horizontal guide pulley 46.
More specifically, in the present embodiment, in order to leave a space for placing other components above the wire rope, the first rope 21 is pulled to the other end of the trolley frame after being discharged from the reel 10, is wound around the first vertical guide pulley 41, is wound around the first upper frame pulley 31 from outside to inside vertically, and is pulled to be fixed to the trolley frame obliquely upward; the second rope 22 is vertically and downwards wound between the second upper frame pulley 32 and the third upper frame pulley 33 after being discharged from the winding drum 10, is obliquely and upwards pulled to bypass the second upper frame pulley 32, and is connected to the upper end of the rotary rocker arm 60 by bypassing the second vertical guide pulley 42 and the third vertical guide pulley 43; the third rope 23 is vertically downwards wound between the second upper frame pulley 32 and the third upper frame pulley 33 after being discharged from the winding drum 10, and is obliquely upwards pulled to be fixed on the trolley frame after being wound around the third upper frame pulley 33; after the fourth rope 24 is discharged from the winding drum 10, the rope is inclined to the other end of the trolley frame, bypasses the fourth vertical guide pulley 44, vertically downwards bypasses the fourth upper frame pulley 34 from outside to inside, and then obliquely upwards winds the fifth vertical guide pulley 45 and the first horizontal guide pulley 46 in sequence, and is connected to the lower end of the rotary rocker arm 60. It can be seen that after the first rope 21 and the fourth rope 24 are pulled to the other end of the trolley frame from the rope outlet of the winding drum 10, the first rope 21 and the fourth rope 24 are directly wound in from the outer side of the upper frame pulley after passing through the vertical guide pulleys respectively, and the first rope 21 and the fourth rope 24 are not bent horizontally, so that the bending times of the steel wire rope are reduced, and the service life of the steel wire rope can be prolonged. It should be noted that the first vertical guide pulley 41 and the fourth vertical guide pulley 44 have not only a guiding function on the steel wire rope but also a function of bearing the weight of the container, and are equal in size to the four upper frame pulleys, and their rotational speeds are also rotated rapidly with the winding and unwinding of the steel wire rope. The second vertical guide pulley 42, the third vertical guide pulley 43, the fifth vertical guide pulley 45 and the first horizontal guide pulley 46 are small pulleys, and serve as guides and fine-tune the inclined angle of the wire rope so as to balance the component force in the horizontal direction X and adjust the rotation angle of the spreader upper frame 50.
The working principle of the invention is as follows: when the drum 10 rotates in the counterclockwise direction, the first, second, third and fourth ropes 21, 22, 23, 24 are retracted, and the upper frame pulley is pulled upward by the pulling force, thereby lifting the spreader upper frame 50. Because the steel wire ropes are wound on the same winding drum 10, the upper frame pulleys on the upper frame 50 of the lifting appliance are synchronously lifted, and the influence of inclination and the like caused by asynchronous lifting is avoided. One ends of the second and fourth ropes 22 and 24 are connected to both ends of the swing arm 60, respectively, and the second and fourth upper frame pulleys 32 and 34, around which the second and fourth ropes 22 and 24 are wound, are disposed at diagonal positions of the spreader upper frame 50, so that the center of gravity of the spreader upper frame 50 is maintained at substantially the middle position of the diagonal lines when the swing angle of the spreader upper frame 50 is adjusted by the swing arm 60, facilitating alignment of the spreader with the top of the container. Specifically, the first rope 21 from the outside of the drum 10 passes around the first vertical guide pulley 41 and then passes around the first upper frame pulley 31 from outside to inside, a obliquely upward tension F 1 is generated on the first upper frame pulley 31, the fourth rope 24 from the outside of the drum 10 passes around the fourth vertical guide pulley 44 and then passes around the fourth upper frame pulley 34 from outside to inside, a obliquely upward tension F 4 is generated on the fourth upper frame pulley 34, the second rope 22 from the inside of the drum 10 passes around the second upper frame pulley 22 from inside to outside, a obliquely upward tension F 2 is generated on the second upper frame pulley 22, a similarly, the third rope 23 from the inside of the drum 10 passes around the third upper frame pulley 33 from inside to outside, a obliquely upward tension F 3 is generated on the third upper frame pulley 33, and the equivalent resultant angle generated by the four tensions is not more than 0.5 °. It should be noted that the component force in the horizontal direction X can be naturally balanced by the gravity of the container to be lifted, so that the upper hanger frame 50 can be stabilized at the balance position, uncontrolled swing can not occur in the horizontal plane XY, and meanwhile, the component force in the vertical direction Z is left to lift the upper hanger frame pulley, so that the upper hanger frame 50 is driven to be lifted.
In summary, only the equivalent resultant force angles generated by the steel wire ropes to the upper frame pulley are equal or have small phase difference, so that the two steel wire ropes at the outer side can directly bypass the upper frame pulley from outside to inside without guiding the steel wire ropes to the inner side of the upper frame pulley through the horizontal guide pulley and then bypass, the bending times of the steel wire ropes are reduced, and the service life of the steel wire ropes is prolonged. According to experimental statistics, the average service life of the steel wire rope without using the lifting rope winding system is only 7.2 ten thousand cases, the use condition of the steel wire rope is improved after the lifting rope winding system is used, the average service lives of the first rope 21 and the fourth rope 24 reach 13 ten thousand cases, the average service lives of the second rope 22 and the third rope 23 reach 17 ten thousand cases, and the service life of the steel wire rope is nearly doubled.
The invention provides a new concept of equivalent resultant force angle for a lifting steel wire rope winding system, the steel wire rope winding modes at the left end and the right end of the upper frame of the lifting appliance can adopt an asymmetric structure, the gesture of the upper frame of the lifting appliance can be controlled, the problem of short service life of the steel wire rope is solved, the effect is obvious, the number of pulleys is reduced, and the lifting appliance has the characteristics of simple structure, convenience in maintenance, low cost and the like.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.
Claims (5)
1. The lifting rope winding system comprises a winding drum, a pulley block, a first rope, a second rope, a third rope and a fourth rope, wherein one end of the first rope, the second rope, the third rope and the fourth rope are fixed on the winding drum and pass through the pulley block, one ends of the second rope and the fourth rope are connected to the winding drum, the other ends of the second rope and the fourth rope are respectively connected to two ends of a rotary rocker arm, the pulley block comprises four upper frame pulleys fixed on an upper frame of a lifting appliance, the first rope passes through the first upper frame pulley, the second rope passes through the second upper frame pulley, the third rope passes through the third upper frame pulley, the fourth rope passes through the fourth upper frame pulley, and the lifting appliance is characterized in that the second upper frame pulley and the fourth upper frame pulley are arranged along a diagonal line of the upper frame of the lifting appliance, and the first rope and the fourth rope pass through the first upper frame pulley and the fourth upper frame pulley from outside to inside after being discharged from the winding drum;
The difference between any two equivalent resultant force angles among the equivalent resultant force angle generated by the first rope on the first upper frame pulley, the equivalent resultant force angle generated by the second rope on the second upper frame pulley, the equivalent resultant force angle generated by the third rope on the third upper frame pulley and the equivalent resultant force angle generated by the fourth rope on the fourth upper frame pulley is not more than 0.5 degrees;
The pulley block further comprises a first vertical guide pulley, a second vertical guide pulley, a third vertical guide pulley, a fourth vertical guide pulley, a fifth vertical guide pulley and a first horizontal guide pulley, and the first rope sequentially winds the first vertical guide pulley and the first upper frame pulley; the second rope sequentially winds the second upper frame pulley, the second vertical guide pulley and the third vertical guide pulley; the third rope is wound around the third upper frame pulley; the fourth rope sequentially winds the fourth vertical guide pulley, the fourth upper frame pulley, the fifth vertical guide pulley and the first horizontal guide pulley.
2. The lift cord wrapping system of claim 1, wherein the first upper frame pulley and the third upper frame pulley are disposed along a diagonal of the spreader upper frame.
3. The lift cord winding system of claim 1, wherein the second and third cords are reeled from inside to outside past the second and third upper frame pulleys after being reeled from the spool.
4. The lift cord winding system of claim 1, wherein the equivalent resultant force angle produced by the first cord to the first upper frame pulley and the equivalent resultant force angle produced by the fourth cord to the fourth upper frame pulley differ by no more than 0.1 °.
5. The lift cord winding system of claim 1, wherein the equivalent resultant force angle produced by the second cord to the second upper frame pulley and the equivalent resultant force angle produced by the third cord to the third upper frame pulley differ by no more than 0.1 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921660.9A CN111908359B (en) | 2020-09-04 | 2020-09-04 | Lifting rope winding system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921660.9A CN111908359B (en) | 2020-09-04 | 2020-09-04 | Lifting rope winding system |
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| CN111908359A CN111908359A (en) | 2020-11-10 |
| CN111908359B true CN111908359B (en) | 2024-06-07 |
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| CN202010921660.9A Active CN111908359B (en) | 2020-09-04 | 2020-09-04 | Lifting rope winding system |
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| CN212559253U (en) * | 2020-09-04 | 2021-02-19 | 上海振华重工(集团)股份有限公司 | Lifting rope winding system |
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- 2020-09-04 CN CN202010921660.9A patent/CN111908359B/en active Active
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| CN101323417A (en) * | 2008-07-28 | 2008-12-17 | 三一集团有限公司 | Anti-swing mechanism of container gantry crane sling |
| CN201942459U (en) * | 2010-10-28 | 2011-08-24 | 三一集团有限公司 | Container crane lifting mechanism and container crane |
| CN108946473A (en) * | 2018-10-09 | 2018-12-07 | 三海洋重工有限公司 | The two-way anti-swing mechanism of crane and crane |
| CN109795952A (en) * | 2019-02-20 | 2019-05-24 | 青岛海西重机有限责任公司 | A kind of cable wire for crane hoisting system |
| CN212559253U (en) * | 2020-09-04 | 2021-02-19 | 上海振华重工(集团)股份有限公司 | Lifting rope winding system |
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