CN201704000U - Amplitude variation mechanism of crane amplitude variation pulley block - Google Patents

Amplitude variation mechanism of crane amplitude variation pulley block Download PDF

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Publication number
CN201704000U
CN201704000U CN2010202324017U CN201020232401U CN201704000U CN 201704000 U CN201704000 U CN 201704000U CN 2010202324017 U CN2010202324017 U CN 2010202324017U CN 201020232401 U CN201020232401 U CN 201020232401U CN 201704000 U CN201704000 U CN 201704000U
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CN
China
Prior art keywords
pulley
fixed
amplitude variation
pulley block
pulleys
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010202324017U
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Chinese (zh)
Inventor
张胜旗
李洪建
马达
王磊
李会群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Port No1 Stevedoring Co Ltd
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Tianjin Port No1 Stevedoring Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Port No1 Stevedoring Co Ltd filed Critical Tianjin Port No1 Stevedoring Co Ltd
Priority to CN2010202324017U priority Critical patent/CN201704000U/en
Application granted granted Critical
Publication of CN201704000U publication Critical patent/CN201704000U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides an amplitude variation mechanism of a crane amplitude variation pulley block. The amplitude variation mechanism comprises a pulley block, a coiling block and a steel wire rope which are fixed on an outer frame through hinge pins; the pulley block comprises a plurality of fixed pulleys and movable pulleys to form a fixed pulley block and a movable pulley block; the fixed pulley block is connected by two rows and three rows of fixed pulleys; the two rows of fixed pulleys and the three rows of fixed pulleys are separated by steel jackets which can prevent the pulleys from bouncing up and down; and two sides of each row of fixed pulleys are provided with baffle plates and guardrails. The amplitude variation pulley block improved reduces the bending alternating stress function borne by the steel wire rope when winding the amplitude variation pulley, ensures the amplitude variation mechanism to work stably in the operation process, and avoids frequent groove popping of the amplitude variation steel wire rope. The existing 16 QLY 25 type wheel-mounted cranes can be replaced once per month instead of being replaced twice, then about 800 thousand of cost can be saved per year. The mechanism can effectively reduce the investment on the production cost, reduce equipment shutdown time caused by replacing the steel wire rope, meet production request, and crate economic benefit.

Description

The luffing mechanism of crane luffing assembly pulley
Technical field
The utility model relates to a kind of luffing mechanism of crane luffing assembly pulley.
Background technology
Along with port development, loading and unloading capacity is in continuous increase.Continue to increase as the major equipment wheel-mounted crane use amount that it is mechanical to flow in the harbour, the main goods class of company is equipment and breakbulk, and its handling process all needs to use wheel-mounted crane, so the serviceability rate of wheel-mounted crane directly has influence on the loading and unloading capacity of company.At present QLY25 type wheel-mounted crane is played in the loading and unloading production operation in existing 16 Taibei of company, often because this hoisting crane crane luffing steel rope severe wear and fracture of wire needed to change 2-3 time in every month had both influenced safety in production, influences the operating efficiency of company again.Through long-term follow-up survey, confirm that its luffing assembly pulley exists defective in design, concrete defective is as follows:
Pulley is the vitals of luffing mechanism, and their defective or operation exception can quicken the wearing and tearing of steel rope.Steel rope repeats by pulley bending many times, and it is tired that steel wire is produced, and toughness descends, and finally causes fracture of wire.And tired fracture of wire appears on the most serious side cover wire of the degree of crook of thigh.Generally, the appearance of tired fracture of wire means that steel rope is near using the later stage.Test shows, the flex life of steel rope and D/d ratio, and promptly the ratio of diameter of pulley D and wirerope diameter d has confidential relation, and the big more life-span of ratio is long more.Diameter of pulley is too small, and steel rope twines in assembly pulley and strengthened by the reverse stress of alternating bending.In the scope of conditions permit, diameter of pulley is increased to the service life that 410mm can prolong the luffing steel rope effectively by original 320mm.
This type assembly pulley is originally fixed pulley group and six running blocks that movable pulley is formed of being made up of five fixed pulleys, five pulleys are two, two, one three arrange and put in its fixed pulley group, be fixed on the housing by three bearing pins, cause housing oversize, rock greatly during luffing mechanism work, it is not steady to work.The pulley arrangements mode is unreasonable in the fixed pulley group, causes the luffing mechanism at work can not held stationary, thereby causes the heel and toe wear of steel rope, reduction of service life.
Summary of the invention
The purpose of this utility model provides a kind of luffing mechanism of crane luffing assembly pulley, be beneficial to avoid the heel and toe wear of luffing steel rope, prolong the service life of steel rope, to improve the serviceability rate of equipment, guarantee safety in production and operating efficiency, effectively reduce productive costs.
For achieving the above object, the technical solution adopted in the utility model provides a kind of luffing mechanism of crane luffing assembly pulley, this luffing mechanism includes by bearing pin and is fixed on housing top sheave group, reel and steel rope, assembly pulley comprises a plurality of fixed pulleys, movable pulley composition fixed pulley group and running block, wherein: described fixed pulley group is fastened on the fixed pulley group housing with two rows and three rows' fixed pulley, two pulleys and three that are ranked are ranked and all are separated by with the steel bushing of play about the anti-limited slip wheel in the middle of the fixed pulley of pulley, and the pulley both sides that whenever are ranked are provided with plate washer and guardrail.
Effect of the present utility model is through improved luffing assembly pulley, reduces the crooked reverse stress effect that steel rope bears when the luffing pulley twines.In operation process, guarantee the luffing mechanism stable working, avoid the luffing steel rope often to go out the phenomenon of groove.Existing 16 QLY25 type wheel-mounted cranes can be changed twice by original every month after the replacing and be reduced to once, and are annual with regard to cost-saved about 800,000 yuan.Can effectively reduce the input of productive costs, when reducing the equipment out of use platform that causes because of change steel rope more, satisfy the production demand, the creation economic benefit.
Description of drawings
Fig. 1 is the structural representation of crane luffing fixed pulley group of the present utility model;
Fig. 2 is the lateral plan of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the B-B cutaway view of Fig. 1;
Fig. 5 is the structural representation of crane luffing running block of the present utility model;
Fig. 6 is the lateral plan of Fig. 5;
Fig. 7 is the birds-eye view of Fig. 5;
Fig. 8 moves towards scheme drawing for crane luffing running block steel rope of the present utility model.
Among the figure:
1, fixed pulley group housing 2, fixed pulley 3, pin shaft hole 4,8, bearing pin 5,9, bearing 6, running block housing 7, movable pulley
The specific embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the structure of crane luffing assembly pulley of the present utility model.
Research by inquiry,, use for reference steel rope and pulley race relation each other, oad redesign to the luffing pulley, after diameter of pulley strengthens in the fixed pulley group, arrange by former method again, can cause the assembly pulley housing oversize, hoisting crane travel and working process in the oscillating quantity of luffing mechanism excessive, easily make steel rope go out groove.Three of pulley arranged to put change into two and arrange and put, then can well address this problem, guarantee the luffing mechanism stable working, reduce the wearing and tearing of steel rope.
Shown in Fig. 1-7, the luffing mechanism of crane luffing assembly pulley of the present utility model, this luffing mechanism includes by bearing pin 4 and bearing pin 8 and is fixed on housing top sheave group, reel and steel rope, assembly pulley comprises a plurality of fixed pulleys 2, movable pulley 7 composition fixed pulley group and running blocks, described fixed pulley group is fastened on the fixed pulley group housing 1 with two rows and three rows' fixed pulley 2, two pulleys and three that are ranked are ranked and all are separated by with the steel bushing of play about the anti-limited slip wheel in the middle of the fixed pulley 2 of pulley, the pulley both sides that whenever are ranked be welded plate washer and guardrail.The diameter of described fixed pulley 2, movable pulley 7 is 400-420mm.
The luffing mechanism of crane luffing assembly pulley of the present utility model consists of the housing of being made by a steel plate, upper and lower surface is according to 6 axis holes of pulley dimensioned, form three through holes, fixed pulley 2, movable pulley 7 and axle are connected with bearing 9 with bearing 5, be separately fixed on the fixed pulley group housing 1 and running block housing 6 of steel plate making, adopt jam plate fixedly to prevent axle play up and down.The fixed pulley group connects all uses two rows and three rows' fixed pulley 2 to be connected and fixed, and two fixed pulleys are middle is separated by with steel bushing, and anti-limited slip wheel is play up and down, realizes that pulley rotates the transmission steel rope.For preventing that steel rope from going out groove, the pulley both sides that whenever are ranked be welded plate washer and guardrail.
This hoisting crane is to rely on jib to realize luffing at vertical plane surface around the swing of its hinge, as shown in Figure 8, pulley is the parts that are used for supporting steel rope and change the steel rope sense of motion, form fixed pulley group and running block by rope, the luffing steel rope is by the winding of reel and pulley, two ends are separately fixed on reel and the running block, running block links to each other with the jib end by drag-line, the fixed pulley group is fixed on the Shears by bearing pin, driver train drives the amplitude-changing drum rotation, take in or emit the luffing steel rope, realize the pitching of arm.
The structure of crane luffing assembly pulley of the present utility model can reduce the wearing and tearing of wheel-mounted crane luffing steel rope in the loading and unloading production operation, the phenomenon of serious wear when avoiding the luffing steel rope in assembly pulley, to twine, actv. prolongs the service life of luffing steel rope, reduce the replacing frequency of luffing steel rope greatly, can also reduce because of changing the manpower and materials that the luffing steel rope drops into, save a large amount of productive costs inputs, ensured the needs of safety in production, improve the service efficiency of wheel-mounted crane.

Claims (2)

1. the luffing mechanism of a crane luffing assembly pulley, this luffing mechanism includes by bearing pin and is fixed on housing top sheave group, reel and steel rope, assembly pulley comprises a plurality of fixed pulleys, movable pulley composition fixed pulley group and running block, it is characterized in that: described fixed pulley group is fastened on the fixed pulley group housing with two rows and three rows' fixed pulley, two pulleys and three that are ranked are ranked and all are separated by with the steel bushing of play about the anti-limited slip wheel in the middle of the fixed pulley of pulley, and the pulley both sides that whenever are ranked are provided with plate washer and guardrail.
2. according to the structure of the described crane luffing of claim assembly pulley, it is characterized in that: the diameter of described fixed pulley, movable pulley is 400-420mm.
CN2010202324017U 2010-06-22 2010-06-22 Amplitude variation mechanism of crane amplitude variation pulley block Expired - Fee Related CN201704000U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202324017U CN201704000U (en) 2010-06-22 2010-06-22 Amplitude variation mechanism of crane amplitude variation pulley block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202324017U CN201704000U (en) 2010-06-22 2010-06-22 Amplitude variation mechanism of crane amplitude variation pulley block

Publications (1)

Publication Number Publication Date
CN201704000U true CN201704000U (en) 2011-01-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010202324017U Expired - Fee Related CN201704000U (en) 2010-06-22 2010-06-22 Amplitude variation mechanism of crane amplitude variation pulley block

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102849645A (en) * 2012-09-27 2013-01-02 山东丰汇设备技术有限公司 Movable pulley and fixed pulley transferable combined type pulley block
CN111153342A (en) * 2020-01-20 2020-05-15 三一海洋重工有限公司 Swing pulley device and crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102849645A (en) * 2012-09-27 2013-01-02 山东丰汇设备技术有限公司 Movable pulley and fixed pulley transferable combined type pulley block
CN102849645B (en) * 2012-09-27 2015-04-15 山东丰汇设备技术有限公司 Movable pulley and fixed pulley transferable combined type pulley block
CN111153342A (en) * 2020-01-20 2020-05-15 三一海洋重工有限公司 Swing pulley device and crane

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110112

Termination date: 20180622

CF01 Termination of patent right due to non-payment of annual fee