CN103193172B - Winding machine without rope tangling - Google Patents
Winding machine without rope tangling Download PDFInfo
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- CN103193172B CN103193172B CN201310117772.9A CN201310117772A CN103193172B CN 103193172 B CN103193172 B CN 103193172B CN 201310117772 A CN201310117772 A CN 201310117772A CN 103193172 B CN103193172 B CN 103193172B
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- 238000004804 winding Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 241000269799 Perca fluviatilis Species 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
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Abstract
The invention discloses a winding machine without rope tangling. The winding machine comprises a frame, a steel wire rope winding device and a steel wire rope tensioning device, wherein the steel wire rope winding device and the steel wire rope tensioning device are mounted on the frame. The winding machine is characterized in that the steel wire rope winding device mainly comprises a spindle, a left bidirectional lead screw sleeve, a right bidirectional lead screw sleeve, an upper spline tile, a lower spline tile, a winding drum, a left winding drum rib plate, a right winding drum rib plate, a left ball slider and a right ball slider, and the steel wire rope tensioning device mainly comprises a driving shaft, a driven shaft, a tensioning wheel, a left transmission device, a right transmission device, a left tensioning device and a right tensioning device. The winding machine mainly has the advantages that the winding drum of the steel wire rope winding device axially moves left and right in a reciprocating manner while axially rotating relative to the frame, and the position of a winding point of a steel wire rope constantly remains unchanged relative to the frame.
Description
Technical field
The present invention relates to technical field of engineering machinery, specifically a kind of winch without disorder cable phenomenon.
Background technology
Winch is mainly used in the construction fields such as building, bridge, metallurgy, mine and oil field, but due to the restriction of installing space and environmental conditions, make the rope feeding angle of steel rope bigger than normal, and steel rope is when non-loaded, the steel rope that reel is wound around easily loosens, thus the row of making restricts uneven, easily cause steel rope to press the situations such as rope, disorder cable, mutually extruding, cause rope woolding chaotic, work efficiency is not high, the service life of steel rope shortens, and there is potential safety hazard.Existing solution steel rope rope feeding angle problem adopts rope winding jib mostly, steel rope rope feeding angle is met the demands, if publication number is the Chinese utility model patent of CN20123120Y, automatic rope arranger installed by winch, but rope winding jib belonging to forced rope, is the plan of taking stopgap measures, fundamentally eliminate steel rope excessive due to rope feeding angle and the side force that causes, make steel rope abrasion more serious on the contrary, reduce service life of steel wire rope, effect is undesirable.And for example publication number is the Chinese utility model patent of CN202284128U, provide a kind of winch, it cylinder and roller shaft is arranged to axially slidably draw bail, and cylinder carries out worm drive by screw rod and nut, when the drum turns, the rolling out a position and can remain unchanged of drag-line.Although this technology eliminates rope feeding angle, because the transmission of screw rod and nut limits, steel rope can only winding of single layer on reel, cannot meet the needs of the construction field such as oil field, mine long distance operation, range of use is restricted.Existing winch all can not give steel rope certain tensile force when non-loaded in addition, thus disorder cable phenomenon is inevitably still existed.
Summary of the invention
For the deficiencies in the prior art, the technical matters that quasi-solution of the present invention is determined is: design a kind of winch without disorder cable phenomenon, this winch eliminates rope feeding angle, for steel rope provides tensile force, steel rope multilayer can be made to be arranged closely on reel, to solve disorder cable problem from root, improve the work efficiency of winch and the service life of steel rope, and structure is simple, range of use is wide.
The technical scheme that the present invention solve the technical problem is, design a kind of winch without disorder cable phenomenon, the steel rope winding plant comprising frame and be installed in frame and steel wire rope stretching device, it is characterized in that: described steel rope winding plant is primarily of main shaft, and left and right two-way leading screw sleeve, upper and lower spline tile, reel, left and right reel floor and left and right ball slider form; Described main shaft is stepped shaft, and centre is thick axle, and two ends are thin axle, selects one end of stepped shaft to be connected with engine installation, speed reduction gearing and brake equipment as required; Described left and right two-way leading screw sleeve is assembled by the thin axle at bearing and main shaft two ends, and is fixed in described frame by bolt; Described upper and lower spline tile is fixed on the thick axle of main shaft by bolt, and the torque drive exported by engine installation is to rack-mounted reel; Described left and right reel floor is fixed on described reel by bolt, with described upper and lower spline tile bearing fit, and can move back and forth left and right thereon; Described left and right ball slider is installed in described left and right cylinder floor respectively, and certain angle can be swung within it, left and right ball slider matches with the screw thread of described left and right two-way leading screw sleeve respectively simultaneously, and can roll thereon, described reel is back and forth moved axially relative to described frame axial-rotation, on one side left and right; Screw thread one end of described left and right two-way leading screw sleeve is closed, and the other end is not closed, and the flight pitch of left and right two-way leading screw sleeve is consistent with the diameter design of steel rope; Described left and right ball slider structure is the same, includes outer ring, inner ring and ball, and the projection on outer ring embeds in the ball hole of inner ring, and extruding ball wherein;
Described steel wire rope stretching device mainly comprises imput shaft, driven shaft, tension wheel, left and right driving device and left and right tightening device; Described imput shaft is arranged in frame by bearing, and tension wheel is equipped with in the centre of imput shaft; Described driven shaft is arranged in the slideway of frame, and can move in slideway, and same tension wheel is equipped with in the centre of driven shaft; Described left and right driving device is made up of driving wheel, ratchet and belt, and driving wheel is installed on the two ends of main shaft, and ratchet is installed on the two ends of imput shaft; Described left and right tightening device is made up of otic placode, spring perch, spring, screw rod and nut, otic placode is installed on the two ends of imput shaft by bearing, spring perch is connected in frame, and vertical with the direction of slideway, and screw rod, nut and spring fitting are in the hole of otic placode and spring perch.
Compared with prior art, the present invention has following characteristics without the winch of disorder cable phenomenon:
1. structure is simple, applied range.Reel on the steel rope winding plant of winch of the present invention operationally can while rotate relative to frame, left and right back and forth moves axially on one side, and ensure that a position that rolls out of steel rope remains constant relative to frame, the demand of reel multilayer close-packed arrays steel rope can be met, can not only use in the construction fields such as building, bridge, also can meet the needs of the construction field such as oil field, mine long distance operation.
2. easy and simple to handle, efficiency improves.The steel wire rope stretching device of winch of the present invention can roll out some the tensioning of rope between two tension wheels by manual regulation steel rope automatically, also, avoids winch when non-loaded because the disorder cable that causes of looseness of steel wire ropes, improves production efficiency.
3. service life of steel wire rope extends.Accurate for steel rope single or multiple lift closely can be arranged on lifting drum by the present invention, not only fundamentally avoid the serious accident that steel rope disorder cable causes, it also avoid the unnecessary wearing and tearing that steel rope is caused by strand oscillator forced rope, extend the service life of steel rope.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 2 is the main axle structure schematic diagram of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 3 is the two-way screw structure schematic diagram of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 4 is the present invention without the main shaft of a kind of embodiment of winch of disorder cable phenomenon and left and right two-way leading screw sleeve and left and right ball slider mounting structure schematic diagram.
Fig. 5 is the reel floor shape structural representation of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 6 is the ball slider shape and structure schematic diagram of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 7 is the tightening device shape and structure schematic diagram of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Fig. 8 is the screw configuration structural representation of the present invention without a kind of embodiment of winch of disorder cable phenomenon.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with specific embodiment and accompanying drawing thereof, the present invention is described in further detail.Should be understood that; the accompanying drawing forming the embodiment of the present application part is used to provide a further understanding of the present invention; the description to concrete structure in this part and description order are only the explanations to specific embodiment, should not be considered as there is any restriction to the protection domain of invention.
The winch without disorder cable phenomenon (being called for short winch, see Fig. 1-8) of the present invention's design, comprise frame 1, steel rope winding plant 2 and steel wire rope stretching device 3, described steel rope winding plant 2, tightening device 3 are installed in frame 1; It is characterized in that described steel rope winding plant 2 comprises main shaft 21, left two-way leading screw sleeve 22, right two-way leading screw sleeve 23, upper spline tile 24, lower spline tile 25, reel 26, left reel floor 27, right reel floor 28, left ball slider 271 and right ball slider 281; Described main shaft 21 is stepped shaft (see Fig. 2,1), and middle thick, two ends are thin, select its one end (left end or right-hand member) to be connected with engine installation, speed reduction gearing and brake equipment according to requirement of engineering; A described left side two-way leading screw sleeve 22, right two-way leading screw sleeve 23 are assembled by the thin axle at bearing and described main shaft 21 two ends, and are fixed in described frame 1 by bolt; Described upper spline tile 24, lower spline tile 25 are fixed on the thick axle in centre of described main shaft 21 by bolt, and the torque drive exported by engine installation is to reel 26; Described left reel floor 27, right reel floor 28 are fixed on the two ends of described reel 26 by bolt symmetry, with described upper spline tile 24, lower spline tile 25 bearing fit, and can move back and forth left and right thereon; Roll left in a floor 27, right cylinder floor 28 described in described left ball slider 271, right ball slider 281 are installed on respectively, and certain angle can be swung within it, respectively with the screw thread fit of a described left side two-way leading screw sleeve 22, right two-way leading screw sleeve 23, and can roll thereon, described reel 26 is rotated while left and right moves back and forth relative to described frame 1, an A position that rolls out of steel rope is remained unchanged relative to described frame 1, meets steel rope compact arranged demand of multilayer on reel 26.Described reel 26 and left and right reel floor 27,28 are bearing fit.
In order to make left ball slider 271, right ball slider 281 realizes smooth commutation, the left end of the two-way leading screw sleeve 22 in a described left side, the right-hand member screw thread of right two-way leading screw sleeve 23 is closed respectively, the other end is not closed, and the flight pitch consistent with the diameter design of steel rope (see Fig. 3) of left and right two-way leading screw sleeve 22,23.
Described left and right ball slider 271,281 structure is the same, includes outer ring, inner ring and ball.Described ball can be more than 3.Specifically, described left ball slider 271 comprises inner ring 2711, outer ring 2712 and ball 2713, and the projection on outer ring 2712 embeds in the ball hole of inner ring 2711, and extruding ball 2713(is wherein see Fig. 6).Described right ball slider 281 is consistent with described left ball slider 271 symmetrical configuration.The ball of described left and right ball slider 271,281 is spheroidal, cylindrical or conical.
Described steel wire rope stretching device 3 comprises imput shaft 31, driven shaft 32, tension wheel 33, Left Drive device 34, right driving device 35, left tightening device 36 and right tightening device 37, described imput shaft 31 is arranged in described frame 1 by bearing, and tension wheel 33 is equipped with in centre, driven shaft 32 is arranged in the slideway of described frame 1, and can move in slideway, and same tension wheel 33 is equipped with in the centre of driven shaft 32, described Left Drive device 34 is by driving wheel 341, belt 342 and ratchet 343 form, right driving device 35 is by driving wheel 351, belt 352 and ratchet 353 form, driving wheel 341 and driving wheel 351 symmetry of right driving device 35 of Left Drive device 34 are installed on the two ends of main shaft 21, ratchet 343 and ratchet 353 symmetry of right driving device 35 of Left Drive device 34 are installed on the two ends of imput shaft 31, the belt 342 of Left Drive device 34 is installed on driving wheel 341 with in the belt grooves of ratchet 343, the belt 352 of right driving device 35 is installed on driving wheel 351 with in the belt grooves of ratchet 353, described left tightening device 36 is by otic placode 361, spring perch 362, screw rod 363, nut 364 and spring 365 form, right tightening device 37 is by otic placode 371, spring perch 372, screw rod 373, nut 374 and spring 375 form, the otic placode 361 of left tightening device 36 and the otic placode 371 of right tightening device 37 are installed on the two ends of described imput shaft 21 by bearing symmetry, the spring perch 362 of described left tightening device is connected on described left frame 11, the spring perch 372 of right tightening device 37 is connected in described right frame 12, difference is also vertical with the direction of slideway, the screw rod 363 of described left tightening device 36, nut 364 and spring 365 are installed on otic placode 361 with in the hole of spring perch 362, the screw rod 373 of same right tightening device 37, nut 374 and spring 375 are installed on otic placode 371 and (see Fig. 1 and Fig. 7) in the hole of spring perch 372.
One end (upper end or left end) of described screw rod 373 is helicitic texture, for being connected with nut 374; The other end (lower end or right-hand member) of screw rod 373 has two sections of screw threads, namely screw thread 3731 and right-hand thread 3732 in, remainder is polished rod, and middle screw thread 3731 and right-hand thread 3732 are respectively used to and being threaded of spring perch 372, and handle 3733(is equipped with see Fig. 8 in the bottom of screw rod 373).
When the feature of winch of the present invention is mainly work, axial-rotation, on one side left and right back and forth move axially on one side relative to described frame 1 for the reel 26 of described steel rope winding plant 2, and make an A position that rolls out of steel rope 29 remain constant relative to described frame 1, thoroughly solve winch disorder cable problem.Steel wire rope stretching device 3 described in winch of the present invention can complete the tensioning that steel rope rolls out steel rope 29 between an A and two tension wheel 33 automatically; Also the tensioning that steel rope rolls out steel rope 29 between an A and two tension wheel 33 can manually be realized.
Below the working process of winch of the present invention and principle of work are described in detail.
When engine installation drives main shaft 21 to rotate, upper spline tile 24 and lower spline tile 25 are with movable reel 26 and left reel floor 27, right reel floor 28 to rotate, the right-hand member of left end and the right side two-way leading screw sleeve 23 of left two-way leading screw sleeve 22 is separately fixed in left frame 11 and right frame 12, the ball 2813 of the right ball slider 281 in the ball 2713 of the left ball slider 271 in left reel floor 27 and right reel floor 28 rolls in screw thread thereon respectively, makes reel 26 and left reel floor 27, right reel floor about 28 move axially simultaneously.When reel 26 moves to limit on the right-right-hand limit position from left to right, the automatic reverse of right ball slider 281, band movable reel 26 moves from right to left; In like manner, when reel 26 moves to left-limit, the automatic reverse of left ball slider 271, band movable reel 26 moves from right to left, thus reel 26 is moved back and forth left and right, axial-rotation one side on one side relative to frame 1, make an A position that rolls out for steel rope remain constant relative to frame 1, meet the steel rope target requirement that close-packed arrays also can be multilaminate coiled on reel 26.
Steel wire rope stretching device 3 described in winch of the present invention can realize the tensioning that steel rope rolls out steel rope 29 between an A and two tension wheels 33 automatically: when steel rope roll out hold non-loaded time, now steel rope 29 needs tensioning, slideway and the horizontal direction of driven shaft 12 place frame 1 have certain angle, at gravity and the left tightening device 36 of driven shaft 32, the spring 365 of right tightening device 37 is with under the spring-force driven dual of spring 375, two tension wheels 33 are adjacent to mutually, thus clamping steel wire rope 29, when winding plant no-load loosening rope, main shaft 21 rotates, driving wheel 351 simultaneously in right driving device 35 drives ratchet 353 to rotate by belt 352, ratchet 343 now in Left Drive device 34 does not rotate, make imput shaft 31 and on tension wheel 33 rotate, thus the linear velocity making steel rope roll out a linear velocity at A place to be less than tension wheel 33 place, realize the tensioning that steel rope rolls out steel rope 29 between an A and two tension wheels 33, when the unloaded rope closing of winding plant, main shaft 21 rotates, driving wheel 341 simultaneously in Left Drive device 34 drives ratchet 343 to rotate by belt 342, ratchet 353 now in right driving device 35 does not rotate, make imput shaft 31 and on tension wheel 33 rotate, thus described steel rope rolls out the linear velocity that a linear velocity at A place is greater than tension wheel 33 place, realize the tensioning that steel rope rolls out some steel rope 29 between two tension wheels.In addition, by changing the transmitting ratio of Left Drive device 34 and right driving device 35, can regulate the size of steel rope 29 tensile force.When steel rope 29 roll out end have a load time, now steel rope 29 does not need tensioning, by arranging the relative position of reel 26 and tension wheel 33, the steel rope 29 that steel rope is rolled out between an A and two tension wheels 33 has certain angle with vertical direction, the gravity of wire rope roll output load can by stretching for this section of steel rope, driven shaft 32 is moved along the slideway of frame 1, thus two tension wheels 33 are separated.
Described steel wire rope stretching device 3 also can manual regulation, realize the tensioning that steel rope rolls out steel rope 29 between an A and two tension wheel 33, described left tightening device 36, the screw rod 363 of right tightening device 37 and screw rod 373 lower end are respectively with middle screw thread 3631 and right-hand thread 3632 and middle screw thread 3731 and right-hand thread 3,732 two sections of screw threads, when steel rope 29 does not need tensioning, the handle 3633 of first rotary screw 363 makes the middle screw thread 361 of left tightening device 36 and the screw-threaded engagement of spring perch 362, the handle 3733 of rotary screw 373 makes the middle screw thread 371 of right tightening device 37 and the screw-threaded engagement of spring perch 372 again, thus two tension wheels 33 of imput shaft 31 and driven shaft 32 are departed from, when steel rope 29 needs tensioning, first make the right-hand thread 3632 of left tightening device 36 and the screw-threaded engagement of spring perch 362, make the right-hand thread 3732 of right tightening device 37 and the screw-threaded engagement of spring perch 372 again, thus two tension wheels 33 of imput shaft 31 and driven shaft 32 are adjacent to, thus clamping steel wire rope 29.In addition, by the screw-threaded engagement degree of the right-hand thread 3632 with spring perch 362 that change described left tightening device 36, also change the right-hand thread 3732 of right tightening device 37 and the screw-threaded engagement degree of spring perch 372 simultaneously, the gripping power to steel rope 29 can be changed.
The present invention does not address part and is applicable to prior art.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
What want supplemental instruction is, the title of the parts such as " upper and lower ", " forward and backward ", " left and right " described in winch of the present invention or installation position word are according to shown in operation position or accompanying drawing, only there is relativism, or be only remove to describe and conveniently, do not represent uniqueness and the indispensability of this structure or installation site.The embodiment of winch of the present invention can be done as required completely and nonessentially suitably adjusts and change.
Claims (5)
1. the winch without disorder cable phenomenon, the steel rope winding plant comprising frame and be installed in frame and steel wire rope stretching device, is characterized in that: described steel rope winding plant forms primarily of main shaft, left and right two-way leading screw sleeve, upper and lower spline tile, reel, left and right reel floor and left and right ball slider; Described main shaft is stepped shaft, and centre is thick axle, and two ends are thin axle, selects one end of stepped shaft to be connected with engine installation, speed reduction gearing and brake equipment as required; Described left and right two-way leading screw sleeve is assembled by the thin axle at bearing and main shaft two ends, and is fixed in described frame by bolt; Described upper and lower spline tile is fixed on the thick axle of main shaft by bolt, and the torque drive exported by engine installation is to rack-mounted reel; Described left and right reel floor is fixed on described reel by bolt, with described upper and lower spline tile bearing fit, and can move back and forth left and right thereon; Described left and right ball slider is installed in described left and right cylinder floor respectively, and certain angle can be swung within it, left and right ball slider matches with the screw thread of described left and right two-way leading screw sleeve respectively simultaneously, and can roll thereon, described reel is back and forth moved axially relative to described frame axial-rotation, on one side left and right; Screw thread one end of described left and right two-way leading screw sleeve is closed, and the other end is not closed, and the flight pitch of left and right two-way leading screw sleeve is consistent with the diameter design of steel rope; Described left and right ball slider structure is the same, includes outer ring, inner ring and ball, and the projection on outer ring embeds in the ball hole of inner ring, and extruding ball wherein;
Described steel wire rope stretching device mainly comprises imput shaft, driven shaft, tension wheel, left and right driving device and left and right tightening device; Described imput shaft is arranged in frame by bearing, and tension wheel is equipped with in the centre of imput shaft; Described driven shaft is arranged in the slideway of frame, and can move in slideway, and same tension wheel is equipped with in the centre of driven shaft; Described left and right driving device is made up of driving wheel, ratchet and belt, and driving wheel is installed on the two ends of main shaft, and ratchet is installed on the two ends of imput shaft; Described left and right tightening device is made up of otic placode, spring perch, spring, screw rod and nut, otic placode is installed on the two ends of imput shaft by bearing, spring perch is connected in frame, and vertical with the direction of slideway, and screw rod, nut and spring fitting are in the hole of otic placode and spring perch.
2. the winch without disorder cable phenomenon according to claim 1, is characterized in that described upper and lower spline tile is trapezoidal key or triangular form key.
3. the winch without disorder cable phenomenon according to claim 1, is characterized in that the ball of described left and right ball slider is spheroidal, cylindrical or conical; Described ball is more than 3.
4. the winch without disorder cable phenomenon according to claim 1, is characterized in that described left and right driving device is Chain conveyer or gear transmission.
5. the winch without disorder cable phenomenon according to claim 1, it is characterized in that there is left-hand thread screw rod one end of described left and right tightening device, the other end has middle screw thread and right-hand thread two sections of screw threads, left-hand thread, is polished rod between middle screw thread and right-hand thread, and handle is equipped with in the bottom of screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117772.9A CN103193172B (en) | 2013-04-07 | 2013-04-07 | Winding machine without rope tangling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310117772.9A CN103193172B (en) | 2013-04-07 | 2013-04-07 | Winding machine without rope tangling |
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| Publication Number | Publication Date |
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| CN103193172A CN103193172A (en) | 2013-07-10 |
| CN103193172B true CN103193172B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310117772.9A Expired - Fee Related CN103193172B (en) | 2013-04-07 | 2013-04-07 | Winding machine without rope tangling |
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| DE2841444A1 (en) * | 1978-09-23 | 1980-04-03 | Audi Nsu Auto Union Ag | Winding mechanism for winch - has drum reciprocated axially by cam whose track consists of two parts of archimedean spiral |
| CN2791004Y (en) * | 2005-03-28 | 2006-06-28 | 荀建华 | Crystal lifting device |
| CN201442815U (en) * | 2009-07-08 | 2010-04-28 | 泰安巨菱钻探装备有限责任公司 | Automatic rope arranging and outgoing device of winch |
| CN202284128U (en) * | 2011-09-24 | 2012-06-27 | 三一重工股份有限公司 | Winch and engineering machinery |
| CN203143980U (en) * | 2013-04-07 | 2013-08-21 | 河北工业大学 | Winch free of disordering of ropes |
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| CN103193172A (en) | 2013-07-10 |
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