CN102491196A - Telescopic type suspension arm splitting method - Google Patents
Telescopic type suspension arm splitting method Download PDFInfo
- Publication number
- CN102491196A CN102491196A CN2011103857319A CN201110385731A CN102491196A CN 102491196 A CN102491196 A CN 102491196A CN 2011103857319 A CN2011103857319 A CN 2011103857319A CN 201110385731 A CN201110385731 A CN 201110385731A CN 102491196 A CN102491196 A CN 102491196A
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- Prior art keywords
- arm
- hoist boom
- telescopic hoist
- split out
- suspension arm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a telescopic type suspension arm splitting method, which comprises a step S1 of extending out a to-be-dismantled suspension arm (40), then extending out a to-be-reserved suspension arm (30) connected with the to-be-dismantled suspension arm (40), and exposing a suspension arm pin (50) which is connected with the to-be-dismantled suspension arm (40) and the to-be-reserved suspension arm (30); a step S2 of carrying out amplitude variation to a telescopic type suspension arm, enabling the telescopic type suspension arm to be inclined downwards along the extending-out direction, and fixing the telescopic type suspension arm; a step S3 of retracting the suspension arm pin (50), and dismantling the to-be-dismantled suspension arm (40) from the inside of the to-be-reserved suspension arm (30). The telescopic type suspension arm splitting method can reduce splitting difficulty of the telescopic type suspension arm, reduces labor intensity, improves working efficiency, and prolongs service life of the suspension arm pin.
Description
Technical field
The present invention relates to the telescopic hoist boom in the crane tool field, in particular to a kind of telescopic hoist boom splitting method.
Background technology
Carry out the bonded assembly telescopic hoist boom for main dependence arm arm pin, the dismounting between the telescoping boom is mainly stretched out and is bounced back through the arm arm pin that will connect a plurality of telescoping booms and realizes.In the arm process, make arm arm pin retraction, the shaft shoulder on the arm arm pin compresses spring, and after length of spring compressed puts in place, need manually knock the arm latch and could realize separating of arm and latch, thus the split of realization arm.Arm of the prior art divides body technique in arm arm pin retraction and open process; Owing to receive the structure influence between the telescoping boom; The cooperation of slide plate and arm arm pin is difficult to hold, and causes in the process of the screw rod of operating arm arm pin, need expending bigger turning effort power and coming rotary screw; Screw head is twisted into two parts easily, caused the fault rate of arm latch very high.
Summary of the invention
The present invention aims to provide a kind of telescopic hoist boom splitting method, can reduce the split difficulty of telescopic hoist boom, reduces labour intensity, increases work efficiency, and prolongs the service life of arm arm pin.
To achieve these goals; According to an aspect of the present invention, a kind of telescopic hoist boom splitting method is provided, has it is characterized in that; Comprise: step S1; Arm to be split out is stretched out, then will with wait that splitting out arm bonded assembly arm to be kept stretches out, make to connect and wait to split out arm and to wait that the arm arm pin that keeps arm exposes; Step S2 carries out luffing to telescopic hoist boom, and direction is oblique to have a down dip along stretching out to make telescopic hoist boom, fixedly telescopic hoist boom; Step S3 makes arm arm pin retraction, will wait to split out arm and split out from waiting to keep in the arm.
Further, the angle of inclination of telescopic hoist boom is deadweight drift angle α among the step S2, and deadweight drift angle α draws according to formula:
G*Sinα＝G*Cosα*μ
Wherein G is the gravity of telescopic hoist boom, and μ waits to split out arm and wait to keep the friction coefficient between the arm.
Further, the extension elongation that keeps arm of treating among the step S1 is 30% of its total length.
Further, telescopic hoist boom also comprises the basic arm that is rigidly attached on the principal arm, waits to keep arm and arm to be split out and is arranged on this basic arm, and deadweight drift angle α is a formed angle between bearing of trend and the horizon of telescopic hoist boom.
What further, treating among the step S1 split out arm stretches out that action is under telescopic hoist boom is in the situation of deadweight drift angle α, to make.
Further, the action of stretching out of waiting to keep arm among the step S1 is made after splitting out arm all stretches out waiting.
Further; This arm arm pin comprises: arm pin body; Be arranged on this and wait to keep arm and this waits to split out between the arm; This arm pin body comprises supporting part and the support portion that is arranged on two ends, and is arranged on the shaft shoulder between this supporting part and this support portion, and this supporting part in axial direction is provided with chute; Locations radially is located in the chute of supporting part of this arm pin body; Drive screw in axial direction is arranged in this arm pin body, and wore this locations, drives the chute slip of this locations along supporting part.
Further, the two ends of this drive screw are arranged in this arm pin body through bearing, are threaded between this drive screw and the locations.
Further, this waits that the arm pin stop end that splits out arm is set with inside flange, and this waits that the arm pin installation end that splits out arm is set with locating flange, and this locations is threaded on this locating flange.
Further, also be provided with compression spring between this shaft shoulder and this inside flange.
Further, step S3 comprises: S31, turn drive screw, and make drive screw under the threaded function of locations, drive arm pin body and wait that along disengaging the direction that keeps arm moves; S32 makes the supporting part of arm pin body break away from arm to be kept.
Use technical scheme of the present invention, telescopic splitting method after arm to be split out stretches out, will with wait to split out arm bonded assembly arm to be kept and extend out to be connected and wait to split out arm and wait that the arm arm pin that keeps arm exposes; Then telescopic hoist boom is carried out luffing, direction is oblique to have a down dip along stretching out to make telescopic hoist boom, fixedly telescopic hoist boom; Make arm arm pin retraction at last, will wait to split out arm and split out from waiting to keep in the arm.Through telescopic hoist boom being adjusted into along stretching out the oblique mode that has a down dip of direction; Waiting to keep the arm utilization conducts oneself with dignity and overcomes and wait to keep the friction force between the arm; Suffered waiting splits out arm and waits to keep the friction drag between the arm when operation arm arm pin thereby reduced; Reduce labor intensity of operating personnel, improved work efficiency.The angle of inclination of telescopic hoist boom makes the friction force of waiting to split out arm and waiting to keep between the arm drop to minimum for deadweight drift angle α, has reduced the operation easier of arm arm pin to greatest extent.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of telescopic hoist boom according to an embodiment of the invention;
Fig. 2 shows the structural representation that telescopic hoist boom according to an embodiment of the invention is in the split state;
Fig. 3 shows the structural representation when telescopic hoist boom begins split according to an embodiment of the invention;
Fig. 4 shows the structural representation after the telescopic hoist boom angle of inclination setting according to an embodiment of the invention;
Fig. 5 shows the force structure scheme drawing after the telescopic hoist boom angle of inclination setting according to an embodiment of the invention; And
Fig. 6 shows the mounting structure scheme drawing of the arm arm pin of telescopic hoist boom according to an embodiment of the invention.
The specific embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
As shown in Figure 1; According to embodiments of the invention, telescopic hoist boom comprises through bearing pin and is arranged on the basic arm 20 on the principal arm 10 of rotating platform of crane and telescopicly waits to keep arm 30 and telescopically and be connected and wait to keep treating on the arm 30 and split out arm 40 along what the length direction of basic arm 20 extended.Wait to keep arm 30 and wait to split out between the arm 40 and link together through arm arm pin 50.Between basic arm 20 and the principal arm 10 for being rigidly connected.
Please combine referring to Fig. 2 to shown in Figure 4; The ultra-large type hoisting crane is being transported or carrying out in the hoisting operation engineering; When needs split out telescopic hoist boom, at first will wait to split out arm 40 along continuous straight runs and stretch out, make and wait to split out arm 40 and stretch out fully and wait to keep outside the arm 30.Beginning to handle telescoping mechanism then makes and waits to keep arm 30 along continuous straight runs to stretching out away from basic arm 20 1 sides; Extension elongation is connected the arm arm pin 50 of waiting to keep arm 30 and waiting to split out between the arm 40 and exposes making, and makes operating personal can be operating as suitable to arm arm pin 50.The extension elongation of waiting to keep arm 30 is preferably about 30% of the overall length of waiting to keep arm 30; Can either guarantee to wait to keep annexation and the support strength between arm 30 and the basic arm 20 like this; Can make again and wait to keep arm 30 and fully stretch out; Stay sufficient operational space to operating personal, be convenient to arm arm pin 50 is operated.
Please combine referring to Fig. 4 and shown in Figure 5, after will waiting to split out arm 40 and waiting to keep definite the getting well of extension elongation of arm 30, make telescopic hoist boom integral body follow principal arm 10 and under the effect of amplitude oil cylinder, rotate together.Principal arm 10 is arranged on the turntable; Luffing action makes that amplitude oil cylinder on the principal arm 10 realizes through being connected; Principal arm 10 rotates with telescopic hoist boom together; Telescopic hoist boom is carried out micro-luffing, make telescopic hoist boom, telescopic hoist boom can be reduced through the gravity of self wait to split out arm 40 and wait to keep the friction force between the arm 30 along the oblique certain angle that has a down dip of hoisting arm expansion direction.Preferably, this angle of inclination is deadweight drift angle α.Deadweight drift angle α is the bearing of trend of telescopic hoist boom and the angle between the horizon.This deadweight drift angle α calculates through formula G*Sin α=G*Cos* μ, and G wherein is the gravity of telescopic hoist boom, and μ waits to split out arm 40 and waits to keep the coefficient of sliding resistance between the arm 30.After telescopic hoist boom being adjusted to deadweight drift angle α, the angle of inclination through 60 pairs of telescopic hoist booms of lifting appliance limits, and guarantees that telescopic hoist boom can accomplish the branch body action down at the state that is in deadweight drift angle α.
Then arm arm pin 50 is operated, made 50 withdrawals of arm arm pin wait to split out in the arm 40, wait to split out arm 40 and wait to keep the connection between the arm 30, will wait to split out arm 40 and among waiting to keep arm 30, split out thereby break off.
Deadweight drift angle α is adjusted at the angle of inclination of telescopic hoist boom; Make wait to split out arm 40 self just in time equal to wait to split out the friction force that arm 40 suffered coming from the fore and aft motion process waits to keep arm 30 along the component that stretches out direction of telescopic hoist boom; Thus; In the process that arm arm pin 50 is operated; 50 required suffered the waiting in motion process that overcome of arm arm pin split out arm 40 and wait that the friction force that keeps arm 30 is reduced to greatest extent, and labour intensity reduces greatly, only need overcome arm arm pin 50 friction force and that wait to split out between the arm 40 own and just can make arm arm pin 50 retractions; Reduced the operation easier of arm arm pin 50; Prevented arm arm pin 50 owing to receiving the excessive problem that causes in operating process, need applying big application force of friction force, also prevented problem, prolonged the service life of arm arm pin 50 owing to the suffered friction force excessive bolt cap dialysis that causes of arm arm pin 50 to arm arm pin 50.
When telescopic hoist boom being carried out the split operation; Also can begin just telescopic hoist boom to be adjusted to the oblique deadweight drift angle α that has a down dip of the flexible direction in edge most; With lifting appliance 60 telescopic hoist boom is sling then; The angle of inclination that guarantees telescopic hoist boom remains at deadweight drift angle α; So that the suffered friction force of the deadweight of the telescopic booms at different levels of telescopic hoist boom and telescopic boom is offset maximization, treat splitting out arm 40 and operate afterwards again, make and wait to split out arm 40 and stretch out fully and wait to keep outside the arm 30.Be under the state of deadweight drift angle α at telescopic hoist boom then, make and wait to keep arm 30 overhanging 30% length, again arm arm pin 50 is operated at last, accomplish the action that splits out of waiting to split out arm 40.
The angular adjustment of telescopic hoist boom can realize through telescoping mechanisms such as telescopic oil cylinder are set between telescopic hoist boom and principal arm 10; Thereby be convenient to the angle of inclination of telescopic hoist boom is adjusted, so that respectively saving between the arm of telescopic hoist boom dismantled.
Please combine referring to shown in Figure 8, the arm arm pin 50 in the present embodiment comprises arm pin body 51 and the locations 20 that is located in the arm pin body 51.Arm pin body 51 in axial direction is provided with sliding tray, and locations 20 can slide along axis direction with respect to arm pin body 51 in this sliding tray.Wait to split out 30 last times of arm when locations 20 is fixedly connected at, arm pin body 51 can slide along axis direction with respect to locations 20, thereby operation arm arm pin 50 makes to wait to split out arm 40 and wait to keep arm 30 and is connected perhaps and separates.
Include the sliding tray that in axial direction extends on the supporting part 55, this sliding tray runs through setting along the radial direction of supporting part 55, and locations 20 is located in this sliding tray, and can in arm pin body 50, slide along the bearing of trend of sliding tray.Sliding tray limits the rotation of locations 20 along the circumferential direction of arm pin body 51, and does not limit its slip along the axial direction of arm pin body 51.Support portion 56 is positioned at when mounted waits to split out arm 40, and tail end stretches out to be waited to split out outside the arm 40, is used for being connected with other parts, and arm arm pin 50 is played guiding and positioning supports effect in the slip of waiting to split out in the arm 40.
In axial direction be provided with mounting hole in the arm pin body 51, be provided with drive screw 53 in the mounting hole rotationally, and the internal diameter of mounting hole is greater than the outside diameter of thread of drive screw 53, mounting hole is a unthreaded hole, makes drive screw 53 free to rotate in arm pin body 51.In the mount grooves at the two ends of mounting hole, be provided with bearing 54; The two ends of drive screw 53 are fixedly installed in the bearing 54; Realize the rotation of drive screw 53 arm pin body 51 in, and drive screw 53 not can and arm pin body 51 between relative motion on the generation axial direction.
Wait that the arm pin stop end that splits out arm 40 is set with inside flange 41; Wait that the arm pin installation end that splits out arm 40 is set with locating flange 42; The support portion 56 of the arm pin body 51 of arm arm pin 50 is passed inside flange 41 and is arranged on and waits to split out on the arm 40, and the supporting part 55 of arm pin body 51 passes locating flange 42 and is provided with.Locations 20 is arranged on the locating flange 42 through bolt, makes locations 20 with respect to waiting that relative motion does not take place to split out arm 40.Behind rotating drive screw rod 53, the supporting part 55 of screw drive structure actuating arm pin body 51 stretches out or withdraws and wait to split out arm 40, thereby realizes waiting to split out arm 40 and wait to keep connection and the fractionation action between the arm 30.
The sidewall of supporting part 55 is provided with positioning spline 58, in this positioning spline, is provided with positioning key, is used for connecting arm pin body 51 and waits to split out arm 40, prevents arm pin body 51 with respect to waiting that splitting out arm 40 rotates.
At the shaft shoulder 52 of arm pin body 51 with wait to split out between the inside flange 41 of arm 40 and also be provided with compression spring 59.
After the angle of inclination of telescopic hoist boom being adjusted to deadweight drift angle α; Because the force of sliding friction of waiting to split out arm 40 and waiting to keep between the arm 30 is offset with waiting the weight component that splits out arm 40; Therefore only need turn drive screw 53 through socket wrench etc.; Make drive screw 53 under the screw drive effect of locations 20; Drive arm pin body 51 and wait that along breaking away from the direction that keeps arm 30 moves, until the supporting part 55 of arm pin body 51 with wait to keep disengaging between the arm 30, just can realize will waiting to split out arm 40 from waiting to keep the operation that arm 30 splits out.Because in turning drive screw 53 processes; The only arm arm pin 50 and wait to split out arm 40 and wait to keep the friction force between the arm 30 just that will overcome; And need not to consider to wait to split out arm 40 and wait to keep the bigger friction force between the arm 30 that therefore required application force is less, the suffered twisting action power of drive screw 53 is less; The head of drive screw 53 is not easy to damage, and has reduced labour intensity in large quantities.
From above description; Can find out; The above embodiments of the present invention have realized following technique effect: telescopic splitting method after arm to be split out stretches out, will with wait to split out arm bonded assembly arm to be kept and extend out to be connected and wait to split out arm and wait that the arm arm pin that keeps arm exposes; Then telescopic hoist boom is carried out luffing, direction is oblique to have a down dip along stretching out to make telescopic hoist boom, fixedly telescopic hoist boom; Make arm arm pin retraction at last, will wait to split out arm and split out from waiting to keep in the arm.Through telescopic hoist boom being adjusted into along stretching out the oblique mode that has a down dip of direction; Waiting to keep the arm utilization conducts oneself with dignity and overcomes and wait to keep the friction force between the arm; Suffered waiting splits out arm and waits to keep the friction drag between the arm when operation arm arm pin thereby reduced; Reduce labor intensity of operating personnel, improved work efficiency.The angle of inclination of telescopic hoist boom makes the friction force of waiting to split out arm and waiting to keep between the arm drop to minimum for deadweight drift angle α, has reduced the operation easier of arm arm pin to greatest extent.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. telescopic hoist boom splitting method, telescopic hoist boom comprises arm to be split out (40) and is socketed in the arm to be kept (30) on this arm to be split out (40) through arm arm pin (50), it is characterized in that, comprising:
Step S1 stretches out this arm to be split out (40), will stretch out with this arm to be split out (40) bonded assembly arm to be kept (30) then, and the arm arm pin (50) of this arm to be split out (40) of connection and this arm to be kept (30) is exposed;
Step S2 carries out luffing to telescopic hoist boom, and direction is oblique to have a down dip along stretching out to make telescopic hoist boom, fixedly telescopic hoist boom;
Step S3 makes arm arm pin (50) retraction, and arm to be split out (40) is split out in arm to be kept (30).
2. telescopic hoist boom splitting method according to claim 1 is characterized in that, the angle of inclination of telescopic hoist boom is deadweight drift angle α among the step S2, and deadweight drift angle α draws according to formula:
G*Sinα＝G*Cosα*μ
Wherein G is the gravity of telescopic hoist boom, and μ waits to split out arm and wait to keep the friction coefficient between the arm.
3. telescopic hoist boom splitting method according to claim 1 is characterized in that, the extension elongation of the arm to be kept (30) among the step S1 is 30% of its total length.
4. telescopic hoist boom splitting method according to claim 2; It is characterized in that; Telescopic hoist boom also comprises the basic arm (20) that is rigidly attached on the principal arm (10); Arm to be kept (30) and arm to be split out (40) are arranged on this basic arm (20), and deadweight drift angle α is a formed angle between bearing of trend and the horizon of telescopic hoist boom.
5. telescopic hoist boom splitting method according to claim 4 is characterized in that, the arm to be split out (40) among the step S1 stretch out that action is under telescopic hoist boom is in the situation of deadweight drift angle α, to make.
6. telescopic hoist boom splitting method according to claim 5 is characterized in that, the action of stretching out of arm to be kept (30) is made after arm to be split out (40) all stretches out among the step S1.
7. telescopic hoist boom splitting method according to claim 1 is characterized in that, this arm arm pin (50) comprising:
Arm pin body (51); Be arranged between this arm to be kept (30) and this arm to be split out (40); This arm pin body (51) comprises supporting part (55) and support portion (56) that are arranged on two ends; And being arranged on the shaft shoulder (52) between this supporting part (55) and this support portion (56), this supporting part (55) in axial direction is provided with chute;
Locations (20) radially is located in the chute of supporting part (55) of this arm pin body (51);
Drive screw (53) in axial direction is arranged in this arm pin body (51), and wore this locations (20), drives the chute slip of this locations (20) along supporting part (55).
8. telescopic hoist boom splitting method according to claim 7 is characterized in that, the two ends of this drive screw (53) are arranged in this arm pin body (51) through bearing (54), is threaded between this drive screw (53) and the locations (20).
9. according to claim 7 or 8 described telescopic hoist boom splitting methods; It is characterized in that; The arm pin stop end of this arm to be split out (40) is set with inside flange (41); The arm pin installation end of this arm to be split out (40) is set with locating flange (42), and this locations (20) is threaded on this locating flange (42).
10. telescopic hoist boom splitting method according to claim 9 is characterized in that, also is provided with compression spring (59) between this shaft shoulder (52) and this inside flange (41).
11. telescopic hoist boom splitting method according to claim 9 is characterized in that step S3 comprises:
S31 turns drive screw (53), makes drive screw (53) under the threaded function of locations (20), drives arm pin body (51) and moves along the direction that breaks away from arm to be kept (30);
S32 makes the supporting part (55) of arm pin body (51) break away from arm to be kept (30).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110385731 CN102491196B (en) | 2011-11-28 | 2011-11-28 | Telescopic type suspension arm splitting method |
| PCT/CN2012/081954 WO2013078904A1 (en) | 2011-11-28 | 2012-09-25 | Telescopic type suspension arm splitting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110385731 CN102491196B (en) | 2011-11-28 | 2011-11-28 | Telescopic type suspension arm splitting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102491196A true CN102491196A (en) | 2012-06-13 |
| CN102491196B CN102491196B (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110385731 Active CN102491196B (en) | 2011-11-28 | 2011-11-28 | Telescopic type suspension arm splitting method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102491196B (en) |
| WO (1) | WO2013078904A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078904A1 (en) * | 2011-11-28 | 2013-06-06 | 中联重科股份有限公司 | Telescopic type suspension arm splitting method |
| CN104495648A (en) * | 2014-11-05 | 2015-04-08 | 中联重科股份有限公司 | Crane arm loading and unloading method and crane arm |
| CN105570261A (en) * | 2016-03-14 | 2016-05-11 | 中船第九设计研究院工程有限公司 | Detachable screw |
| CN105621265A (en) * | 2016-03-29 | 2016-06-01 | 邹志勇 | Lifting machine |
| CN112978586A (en) * | 2021-02-24 | 2021-06-18 | 殷智勇 | Portable hoisting platform equipment that carries of electron tube |
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| GB1121480A (en) * | 1965-07-16 | 1968-07-31 | Karl Fritjof Torbjorn Adolfsso | Improvements in and relating to cranes |
| US3945333A (en) * | 1974-12-20 | 1976-03-23 | Harnischfeger Corporation | Means for storing and connecting jib for telescopic boom of mobile crane |
| JPS58127085U (en) * | 1982-02-19 | 1983-08-29 | 株式会社多田野鉄工所 | Boom removable crane |
| JPH07223796A (en) * | 1994-02-08 | 1995-08-22 | Tadano Ltd | Boom foot pin engaging/disengaging device for truck crane |
| CN100999301A (en) * | 2006-12-28 | 2007-07-18 | 长沙中联重工科技发展股份有限公司 | Cam type separated retractable pin mechanism for crane |
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| CN85106523B (en) * | 1985-08-31 | 1987-05-27 | 同济大学 | Double head folding cantilever and bottom turning type crane |
| BE1014361A3 (en) * | 2001-09-05 | 2003-09-02 | Lille Allebroer Leo Alix De | Device for moving a load, especially verreiker of crane. |
| DE102008034676B4 (en) * | 2008-07-25 | 2016-11-24 | Liebherr-Werk Ehingen Gmbh | Method for mounting a telescopic crane jib and apparatus for carrying out the method |
| CN101734561B (en) * | 2009-12-15 | 2012-10-10 | 中联重科股份有限公司 | Arm pin structure of suspension arm and arm pin assembly and disassembly mechanism thereof |
| CN102491196B (en) * | 2011-11-28 | 2013-07-24 | 中联重科股份有限公司 | Telescopic type suspension arm splitting method |
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2011
- 2011-11-28 CN CN 201110385731 patent/CN102491196B/en active Active
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2012
- 2012-09-25 WO PCT/CN2012/081954 patent/WO2013078904A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1121480A (en) * | 1965-07-16 | 1968-07-31 | Karl Fritjof Torbjorn Adolfsso | Improvements in and relating to cranes |
| US3945333A (en) * | 1974-12-20 | 1976-03-23 | Harnischfeger Corporation | Means for storing and connecting jib for telescopic boom of mobile crane |
| JPS58127085U (en) * | 1982-02-19 | 1983-08-29 | 株式会社多田野鉄工所 | Boom removable crane |
| JPH07223796A (en) * | 1994-02-08 | 1995-08-22 | Tadano Ltd | Boom foot pin engaging/disengaging device for truck crane |
| CN100999301A (en) * | 2006-12-28 | 2007-07-18 | 长沙中联重工科技发展股份有限公司 | Cam type separated retractable pin mechanism for crane |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078904A1 (en) * | 2011-11-28 | 2013-06-06 | 中联重科股份有限公司 | Telescopic type suspension arm splitting method |
| CN104495648A (en) * | 2014-11-05 | 2015-04-08 | 中联重科股份有限公司 | Crane arm loading and unloading method and crane arm |
| CN105570261A (en) * | 2016-03-14 | 2016-05-11 | 中船第九设计研究院工程有限公司 | Detachable screw |
| CN105621265A (en) * | 2016-03-29 | 2016-06-01 | 邹志勇 | Lifting machine |
| CN112978586A (en) * | 2021-02-24 | 2021-06-18 | 殷智勇 | Portable hoisting platform equipment that carries of electron tube |
| CN112978586B (en) * | 2021-02-24 | 2022-06-14 | 东台市高科技术创业园有限公司 | Portable hoisting platform equipment that carries of electron tube |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013078904A1 (en) | 2013-06-06 |
| CN102491196B (en) | 2013-07-24 |
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