CN102942111B - Oblique-pulley lifting hook device - Google Patents

Oblique-pulley lifting hook device Download PDF

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Publication number
CN102942111B
CN102942111B CN201210460487.2A CN201210460487A CN102942111B CN 102942111 B CN102942111 B CN 102942111B CN 201210460487 A CN201210460487 A CN 201210460487A CN 102942111 B CN102942111 B CN 102942111B
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CN
China
Prior art keywords
pulley
oblique
hook
lifting hook
fixed pulley
Prior art date
Application number
CN201210460487.2A
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Chinese (zh)
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CN102942111A (en
Inventor
滕勇
王明
尹志明
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诺威起重设备(苏州)有限公司
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Priority to CN201210460487.2A priority Critical patent/CN102942111B/en
Publication of CN102942111A publication Critical patent/CN102942111A/en
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Publication of CN102942111B publication Critical patent/CN102942111B/en

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Abstract

The invention discloses an oblique-pulley lifting hook device, which comprises a lifting hook, a lifting hook nut, thrust bearings, a lifting hook transverse beam, pulley blocks and a pull plate. Each pulley block comprises a fixed pulley and a movable pulley. The oblique-pulley lifting hook device is characterized in that projection positions of rope inlet and outlet points of the fixed pulley and the movable pulley are on the same line. The oblique-pulley lifting hook device has the advantages that the structure is simple, the device is convenient to install, the service life of the pulleys, steel wire ropes and the bearings is prolonged, the replacement cycle of wearing parts is prolonged, and the time and the expense for production and maintenance are saved.

Description

Oblique pulley jib hook device
Technical field
The present invention relates to a kind of hoisting crane, especially a kind of tiltedly pulley jib hook device.
Background technology
Cargo hook gear is that hoisting crane applies the most general load-engaging device, and it is made up of the parts such as suspension hook, hook nut, thrust baring, lifting beam with hook, pulley, sheave shaft and arm-tie.Use pulley to reach labour-saving object in cargo hook gear, during work, steel rope is wrapped on pulley to be close to tangent mode, simultaneously because the fixed pulley of the pulley in cargo hook gear and top, end anchor fitting and reel in the vertical direction have dislocation, cause steel rope to have certain drift angle, thus make steel rope abrasion (with the friction of reel, pulley room) affect the service life of steel rope and pulley.
Summary of the invention
The present invention seeks to: provide a kind of and can reduce the destructive force of steel rope to pulley, bearing, extend the oblique pulley jib hook device of pulley and rope service-life.
Technical scheme of the present invention is: a kind of tiltedly pulley jib hook device, comprise suspension hook, hook nut, thrust baring, lifting beam with hook, assembly pulley and arm-tie, described assembly pulley comprises a fixed pulley and a movable pulley, it is characterized in that, entering of described fixed pulley and movable pulley, rope stretching point horizontal surface projected position point-blank, movable pulley simultaneously, fixed pulley, fixed pulley anchor fitting and roll device in the vertical direction have dislocation, and described fixed pulley and fixed pulley anchor fitting are not 0 at the horizontal surface angle that projects, described fixed pulley and fixed pulley anchor fitting equal movable pulley and fixed pulley anchor fitting to project at horizontal surface the angle of angle in the project angles of angle of horizontal surface.
Further, described assembly pulley is at least one group.
Further, when the quantity of assembly pulley is even number, every two pairs of assembly pulleys determine cunning horizontal surface projected position not point-blank and not parallel.
A kind of hoisting crane, is characterized in that, apply above-mentioned oblique pulley jib hook device.
Principle of work: Fig. 1 is the contact point section drawing of ideally steel rope and pulley groove, and now contact point is at pulley kernel of section.Contact point is subject to positive pressure, and pressure is radially directed towards bearing (load-carrying capacity of bearing to radial pressure is strong), and friction condition is static friction (static friction can not produce wearing and tearing).This kind of situation is all optimal to steel rope, pulley and bearing, unfortunately seldom occurs.Fig. 2 is the contact point section drawing of steel rope under general state and pulley groove, and now steel rope center and pulley groove center be not on same vertical line, and it is more serious that contact point departs from.Positive pressure on contact point produces axial component (bearing to) on bearing, friction condition is cliding friction (cliding friction can produce wearing and tearing), cause following damage: 1. steel rope has certain drift angle, the steel rope of deflection and the two sides friction ratio of pulley more severe, the two serious wear; 2. deflection angle of rope can give the axial force that one, bearing is larger.According to GB/T3811-2008 defined, maximum deflection angle (angle between steel rope line of centers and the plane vertical with sheave shaft) when steel rope moves into or lay out pulley groove should not be greater than 5 ° (get when actual design calculates and be not more than 4 °), when angle of deviation is critical angle 4 °, the friction of steel rope and pulley groove side is also larger, serious wear, the friction force f=μ Fsin θ of steel rope as shown in Figure 2, Figure 3, Figure 4 and pulley groove side, wherein μ is the friction coefficient of pulley groove side, F is the pulling force of steel rope, and θ steel rope is into and out of rope angle; Moment of torsion M=F on pulley.* l, wherein F.The axle pressure on bearing, F.=F'cos α, F' are the positive pressure F'=Fsin θ producing friction, and l is toggle.As can be seen from above formula, reduce the turnover rope angle θ of steel rope, friction force f and moment of torsion M can be reduced.Fixed pulley of the present invention and movable pulley into and out of restrict a little horizontal surface projected position point-blank, turnover rope angle is 0, damages bearing, pulley and steel rope because this reducing lineoutofservice signal pull F.Extend the life-span of correlated parts.
Advantage of the present invention is:
Structure is simple, easy for installation, increases the service life of pulley and steel rope, pulley and bearing, and the replacement cycle extending consumable accessory is that time and money has been saved in production and maintenance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the contact point section drawing of steel rope ideally and pulley groove.
Fig. 2 is the contact point section drawing of steel rope under general state and pulley groove.
Fig. 3 is pulley force diagram.
Fig. 4 is pulley and shaft strength figure.
Fig. 5 is oblique pulley jib hook device structural representation of the present invention.
Fig. 6 is oblique pulley jib hook device fixed pulley of the present invention and movable pulley positional structure schematic diagram.
Fig. 7 is existing fixed pulley and movable pulley position view.
Fig. 8 is fixed pulley of the present invention and movable pulley position view.
Wherein: 1 steel rope cross section; 2 pulley groove cross sections; 3 contact points; 4 pulleys; 5 bearings; 6 sheave shafts; 7 fixed pulleys; 8 movable pulleys; 9 roll devices; 10 end anchor fittings; 11 steel ropes; 12 cargo hook gears; 15 fixed pulley anchor fittings.
Detailed description of the invention
Embodiment: oblique pulley jib hook device as shown in Figure 5, comprise suspension hook, hook nut, thrust baring, lifting beam with hook, assembly pulley and arm-tie, this assembly pulley comprises fixed pulley 7 and a movable pulley 8, fixed pulley 7 and movable pulley 8 into and out of restrict a little horizontal surface projected position point-blank, the elevation angle of the relative fixed pulley of steel rope is θ 1=0, as shown in Figure 8.Relative to existing scheme, because movable pulley axle is parallel, actual when being raised to topmost, the elevation angle of the relative fixed pulley of steel rope is θ 1, as shown in Figure 7.Fixed pulley and movable pulley into and out of restrict a little horizontal surface projected position point-blank, turnover rope angle is 0, damages bearing, pulley and steel rope because this reducing lineoutofservice signal pull F.Extend the life-span of correlated parts.In order to make assembly pulley working effect better, fixed pulley and fixed pulley anchor fitting equal movable pulley and fixed pulley anchor fitting to project at horizontal surface the angle of angle in the project angles of angle of horizontal surface, as shown in Figure 6.After adopting such setting, fixed pulley and movable pulley and steel rope stressed more even, be more convenient to reduce lineoutofservice signal pull F and bearing, pulley and steel rope damaged.Assembly pulley in the present embodiment is two groups, and the modes of emplacement of two groups of assembly pulleys is modes of emplacement facing each other.Also more assembly pulley can be installed according to actual needs, when the quantity of assembly pulley be greater than two and for even number time, every two pairs of assembly pulleys determine cunning horizontal surface projected position not point-blank and not parallel, the better effects if of placement like this.
Above embodiment is only the present invention's a kind of embodiment wherein, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (4)

1. an oblique pulley jib hook device, comprise suspension hook, hook nut, thrust baring, lifting beam with hook, assembly pulley and arm-tie, described assembly pulley comprises a fixed pulley and a movable pulley, it is characterized in that, entering of described fixed pulley and movable pulley, rope stretching point horizontal surface projected position point-blank, movable pulley simultaneously, fixed pulley, fixed pulley anchor fitting and roll device in the vertical direction have dislocation, and described fixed pulley and fixed pulley anchor fitting are not 0 at the horizontal surface angle that projects, described fixed pulley and fixed pulley anchor fitting equal movable pulley and fixed pulley anchor fitting to project at horizontal surface the angle of angle in the project angles of angle of horizontal surface.
2. oblique pulley jib hook device according to claim 1, it is characterized in that, described assembly pulley is at least one group.
3. oblique pulley jib hook device according to claim 2, is characterized in that, when the quantity of assembly pulley is even number, every two pairs of assembly pulleys determine cunning horizontal surface projected position not point-blank and not parallel.
4. a hoisting crane, is characterized in that, comprises oblique pulley jib hook device according to claim 1.
CN201210460487.2A 2012-11-15 2012-11-15 Oblique-pulley lifting hook device CN102942111B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210460487.2A CN102942111B (en) 2012-11-15 2012-11-15 Oblique-pulley lifting hook device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210460487.2A CN102942111B (en) 2012-11-15 2012-11-15 Oblique-pulley lifting hook device

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CN102942111A CN102942111A (en) 2013-02-27
CN102942111B true CN102942111B (en) 2015-06-17

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108569635A (en) * 2018-03-19 2018-09-25 林若波 A kind of pulley blocks lifting device and its implementation with more multiplication journey speedups

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1209567A1 (en) * 1983-01-11 1986-02-07 Vasilev Andrej E Device for turning crane cargo hook
CN101258095A (en) * 2005-09-06 2008-09-03 特雷克斯-德马格有限及两合公司 Combination double bottom hook block
CN201125127Y (en) * 2007-11-05 2008-10-01 河南省新乡市矿山起重机有限公司 Ultralong electric gourd
CN101717038A (en) * 2009-12-14 2010-06-02 杭州国电大力机电工程有限公司 Multiplication-variable hook device
CN201694747U (en) * 2010-06-21 2011-01-05 南昌铁路局南昌机械厂 Twelve-rope container anti-swing mechanism
CN203065011U (en) * 2012-11-15 2013-07-17 诺威起重设备(苏州)有限公司 Oblique pulley hook device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4870270B2 (en) * 2001-02-28 2012-02-08 株式会社タダノ Hook block suspension mechanism for crane with boom
JP2004155580A (en) * 2002-11-08 2004-06-03 Ishikawajima Transport Machinery Co Ltd Trolley crane

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1209567A1 (en) * 1983-01-11 1986-02-07 Vasilev Andrej E Device for turning crane cargo hook
CN101258095A (en) * 2005-09-06 2008-09-03 特雷克斯-德马格有限及两合公司 Combination double bottom hook block
CN201125127Y (en) * 2007-11-05 2008-10-01 河南省新乡市矿山起重机有限公司 Ultralong electric gourd
CN101717038A (en) * 2009-12-14 2010-06-02 杭州国电大力机电工程有限公司 Multiplication-variable hook device
CN201694747U (en) * 2010-06-21 2011-01-05 南昌铁路局南昌机械厂 Twelve-rope container anti-swing mechanism
CN203065011U (en) * 2012-11-15 2013-07-17 诺威起重设备(苏州)有限公司 Oblique pulley hook device

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Free format text: CORRECT: INVENTOR; FROM: TENG YONG WANG MING YIN ZHIMING TO: TAO FENGHUA

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Inventor after: Tao Fenghua

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Inventor before: Yin Zhiming