CN105000478A - Lifting mechanism for engineering machinery - Google Patents
Lifting mechanism for engineering machinery Download PDFInfo
- Publication number
- CN105000478A CN105000478A CN201510417903.4A CN201510417903A CN105000478A CN 105000478 A CN105000478 A CN 105000478A CN 201510417903 A CN201510417903 A CN 201510417903A CN 105000478 A CN105000478 A CN 105000478A
- Authority
- CN
- China
- Prior art keywords
- derricking gear
- weight
- equipment
- construction machinery
- jib
- 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.)
- Pending
Links
Classifications
-
- 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
- B66C23/06—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 with jibs mounted for jibbing or luffing movements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- 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
- B66C23/88—Safety gear
-
- 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
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
Abstract
The invention provides a lifting mechanism for engineering machinery; the engineering machinery includes an arm frame system; the arm frame system is provided with at least one lifting mechanism and a safety control system thereof; the lifting safety control system includes a lifting force sensor, a controller, a landing leg length sensor and a landing leg angle sensor; the lifting mechanism is one or a combination of a hole type lifting mechanism, a detachable type lifting mechanism and a pulley type lifting mechanism; the hole type lifting mechanism includes a bearing plate, a detachable type lifting mechanism, a positioning plate and a bearing body; the positioning plate is welded on a arm frame of the arm frame system; with utilization of the folding arm frame, the lifting mechanism for the engineering machinery can perform a lifting operation in a narrow area where a telescopic arm frame is difficult to reach; with reasonable utilization of the lifting capacity of a pump truck, the function of the pump truck is expanded; and arm frame overload and pump truck tilting can be prevented.
Description
Technical field
The present invention relates to a kind of construction machinery and equipment derricking gear, belong to field of mechanical technique.
Background technology
Car hosit, it adopts telescopic jib, and shortcoming is that scope of work is limited, can only construct in spacious place, small space cannot work, such as the lift heavy on certain floor plate on building ground, upper strata floor limits the working space of telescopic crane boom, has been difficult to lift heavy task.Tower crane, its jib is also based on telescopic boom, and except being difficult to except work at little working space, also have a defect to be, tower crane depends on fixing column, lacks the alerting ability of movement at any time, so its scope of work is also restricted.Boom, adopts folding arm to carry out cloth, folding arm is provided with hoisting device, makes it possess cloth and load-carrying ability simultaneously.Tower machine and boom are all two kinds of functions superposed, and all must rely on tower body and support, and scope of work is restricted; And after function superposition, if the weight weight that folding arm lifts by crane is excessive, just easily there is safety problem in complex structure.
Summary of the invention
The invention provides a kind of construction machinery and equipment derricking gear, can be realized the above.
For solving above technical matters, the invention provides following technical scheme: a kind of construction machinery and equipment derricking gear, comprise boom system, boom system is provided with at least one derricking gear and safety control system thereof, described lifting safety control system comprises lifting force sensor, controller, supporting leg linear transducer and supporting leg angular transducer; Described derricking gear is cellular type derricking gear, one of removable derricking gear and pulley-type derricking gear or combination; Cellular type derricking gear comprises bearing plate, removable derricking gear, locating plate and weight body, and wherein, described locating plate is welded on the jib of described boom system, and described weight body is detachably connected on described locating plate, and described load-bearing is provided with hole; Pulley-type derricking gear, comprise one or more pulley, steel cable, suspension hook, described one or more pulley can be rotatably set on the jib of described boom system, described one or more pulley walked around by described steel cable, one end of described steel cable connects described suspension hook, and the other end is connected to the hoisting mechanism on construction machinery and equipment derricking gear.
Further, described controller is also for the weight according to described weight, and described weight to the distance of the center of gyration on described boom system and described construction machinery and equipment derricking gear chassis determines the heavy burden moment of described boom system, and according to the moment upper limit of described heavy burden moment and described boom system, safety control is carried out to the lifting operation of weight.
Described lifting safety control system also comprises jib angular transducer, for detecting the rotational angle of described more piece jib, to determine the attitude of described boom system.
Described lifting safety control system also comprises bearing force sensor, for detecting the bearing force of each supporting leg of described support system, the described bearing force of described controller according to each supporting leg and the support scope of described support system, calculate the overall center of gravity of described construction machinery and equipment derricking gear and described weight.
Described controller hangs according to the target that user is arranged and send position, determines that described weight is hung and deliver to that described target is hung when sending position, and described weight is to the distance of the center of gyration on described boom system and described construction machinery and equipment derricking gear chassis.
This construction machinery and equipment derricking gear that the present invention relates to, can realize the above.
Accompanying drawing explanation
Fig. 1 is the operating diagram of construction machinery and equipment according to an embodiment of the invention;
Fig. 2 and Fig. 3 is the operating diagram of construction machinery and equipment according to an embodiment of the invention;
Fig. 4 is the local structural graph of construction machinery and equipment according to an embodiment of the invention;
Fig. 5 is the local structural graph of construction machinery and equipment according to an embodiment of the invention;
Fig. 6 is the local structural graph of construction machinery and equipment according to an embodiment of the invention.
Detailed description of the invention
Construction machinery and equipment comprises engineering machinery chassis, be arranged on the support system on described engineering machinery chassis, pumparound and boom system, described boom system is provided with at least one derricking gear, and lifting safety control system, support system, for supporting described engineering machinery chassis; Pumparound, for pump concrete; Boom system, comprise more piece jib hinged in turn, described jib is provided with the delivery pipe for delivering concrete, and described boom system can carry out revolution action relative to described engineering machinery chassis, and can carry out between described more piece jib folding and launching action; Derricking gear, is arranged on for mounting weight on described jib, by the action of described jib by described weight handling to desired location; Lifting safety control system, for the weight according to weight, the heavy burden parameter of boom system and the support scope of support system carry out safety control to the lifting operation of weight.
Described pumparound and boom system achieve the pump function of construction machinery and equipment, and described boom system coordinates derricking gear to achieve the hoisting function of construction machinery and equipment.This project machinery can by pump truck and tackling system, or hoisting crane and pumparound, or other machinery and lifting or pumparound etc. realize.Meanwhile, in order to ensure the safety of lifting and pumpdown, design lifting safety control system, ensures that construction machinery and equipment can fulfil assignment smoothly.
Described lifting safety control system comprises lifting force sensor and controller, described lifting force sensor setting on described derricking gear for detecting the weight of described weight; Described controller is used for carrying out safety control with the heavy burden upper limit of the jib of the described weight of mounting to the lifting operation of weight according to the weight of described weight.In this technical scheme, in this technical scheme, by the judgement of the heavy burden upper limit, the weight of weight can be prevented too high, can cause damage to single-unit jib, thus affect job safety.
Described controller is also for the weight according to described weight, and described weight to the distance of the center of gyration of described boom system and described engineering machinery chassis determines the heavy burden moment of described boom system, and according to the moment upper limit of described heavy burden moment and described boom system, safety control is carried out to the lifting operation of weight.In this technical scheme, by the calculating of heavy burden moment, ensure the stressed at zone of reasonableness of boom system entirety, effectively can prevent weight from transshipping and boom system entirety is caused damage, further ensure the job safety of work mechanism.
Described controller is also for the weight according to described weight, and the attitude of described boom system determines the overall center of gravity of described construction machinery and equipment, and carries out safety control according to the support scope of described overall center of gravity and described support system to the lifting operation of weight.In this technical scheme, and by the calculating of center of gravity, the weight due to weight can be prevented too high, cause overall engineering machine to tumble.
Described lifting safety control system also comprises jib angular transducer, for detecting the rotational angle of described more piece jib, to determine the attitude of described boom system.In this technical scheme, make use of angular transducer, jib angle can be detected in real time, simultaneously because the length of each joint jib is fixed known, so can determine the attitude of boom system exactly.
Described lifting safety control system also comprises: supporting leg linear transducer and/or supporting leg angular transducer, for detecting the extension elongation of the supporting leg of described support system and/or arranging angle, described controller according to the extension elongation of described supporting leg and/arrange angle, calculate the support scope of described support system.In this technical scheme, in conjunction with the real work situation of support system, its support scope can be calculated exactly, with further, carry out anti-tipping judgement exactly.
Described lifting safety control system also comprises: bearing force sensor, for detecting the bearing force of each supporting leg of described support system, the described bearing force of described controller according to each supporting leg and the support scope of described support system, calculate the overall center of gravity of construction machinery and equipment described in described current time and described weight.In this technical scheme, adopt the mode of bearing force detecting support system, can the more convenient center of gravity calculating construction machinery and equipment more accurately, to carry out anti-tipping judgement.
Described controller hangs according to the target that user is arranged and send position, determines that described weight is hung and deliver to that described target is hung when sending position, to the distance of the center of gyration of described boom system and described engineering machinery chassis.In this technical scheme, as long as be aware of the target lift heavy position of user, then can predicting the position of hanging and having sent rear weight, having sent rear boom system whether to exist vitiable danger can to carry out anticipation to hanging.
Described derricking gear is cellular type derricking gear, one of removable derricking gear and pulley-type derricking gear or combination; Cellular type derricking gear, comprises bearing plate, and described bearing plate is welded on the jib of described boom system, and described bearing plate is provided with hole; Removable derricking gear, comprises locating plate and weight body, and wherein, described locating plate is welded on the jib of described boom system, and described weight body is detachably connected on described locating plate, and described weight body is provided with hole; Pulley-type derricking gear, comprise one or more pulley, steel cable, suspension hook, described one or more pulley can be rotatably set on the jib of described boom system, described one or more pulley walked around by described steel cable, one end of described steel cable connects described suspension hook, and the other end is connected to the hoisting mechanism on construction machinery and equipment.
The construction machinery and equipment provided in following embodiment, based on concrete pump truck, describes technical scheme of the present invention in detail.
For current pump truck, it to become the construction machinery and equipment having concurrently and pump up function, need in the present embodiment to solve following problem: 1) on pumping vehicle arm rack, design lifting derricking gear; 2) ensure that hoisting heavy does not cause damage to pumping vehicle arm rack.
In the present embodiment, the pump truck of final improvement can as shown in Fig. 1, on the boom system 102 of pump truck, being provided with derricking gear 104(is arranged on more piece jib, by steel cable, pulley, suspension hook), may be used for mounting weight 106, boom system 102 and at least one derricking gear 104 cooperating, can realize the lifting of weight 106.As shown in Fig. 1,106, weight can winch in the floor in the middle of building 108 by the technical scheme of the present embodiment, ensure that hoisting operation has enough alerting abilitys, the operation between floor also can complete smoothly, can not there is operation dead angle and scope of work is enough large.
Pump truck, when operation, according to actual conditions from the multiple derricking gears boom system, is selected to use derricking gear in this subjob.As shown in Fig. 2, if operation distance is shorter, only can enable derricking gear on jib 202 completely to carry out lift heavy operation, again as shown in Figure 3, needs weight hung deliver to more remote, or during high height, the derricking gear on jib 306 can be enabled, jointly complete lifting operation by utilizing three joint jibs 302,304 and 306.
On the basis of such scheme, relative to traditional pump truck, in the present embodiment, achieve the expansion to pump truck function, pumping vehicle arm rack arranges derricking gear, in a particular embodiment, each joint jib of pump truck all puts derricking gear, and can with car configuration lifting steel cable and suspension hook.In order to ensure that lift heavy does not damage the jib of pump truck, lifting safety control system need be installed additional, comprising lifting force sensor, jib angular transducer, supporting leg linear transducer, supporting leg angular transducer, bearing force sensor, controller.This system mainly relies on lifting force sensor to gather weight weight information, jib angular transducer is relied on to gather jib attitude information, what rely on supporting leg linear transducer collection supporting leg stretchs out length, what rely on supporting leg angular transducer detection supporting leg arranges angle, relies on bearing force sensor to detect the bearing force of each supporting leg.These information enter controller, by imputing in advance in controller
Method is carried out calculating to current working and is judged.Calculating basis for estimation is as follows: according to detecting that the lifting force sensor of weight information judges the derricking gear enabled.
Controller, according to the lift heavy upper-limit information of the single-unit jib at this derricking gear place, judges whether weight weight exceeds standard, if exceeded standard, reports to the police, and adjustment lift heavy position, if do not exceeded standard, carries out moment judgement.
Controller carries out moment when judging, according to jib attitude information, load information, the derricking gear enabled to the distance of the center of gyration on jib and pump truck chassis, calculate the moment that weight applies jib, judge whether this moment exceedes the moment upper limit of boom system, if exceed the moment upper limit, report to the police, likely boom system entirety is caused damage, if do not exceed the upper limit, then carry out anti-tipping judgement.
Herein, it should be noted that, the attitude information of Real-time Collection jib can be carried out by jib angular transducer, also can by receiving user's input, determine the attitude information of certain moment jib following, because the weight of weight is fixed, so based on jib in not attitude in the same time, can judge that boom system is in not heavy burden moment in the same time, judges to carry out overload.
When controller carries out anti-tipping judgement, supporting leg according to gathering is stretched out length and arranges angle, determine the support scope of the supporting leg of support system, meanwhile, based on the overall weight of weight and pump truck, and weight is to the distance of the center of gyration on jib and pump truck chassis, the overall center of gravity of weight and pump truck can be calculated, if center of gravity does not meet the stability requirement of lifting, report to the police, allow adjustment; If center of gravity meets the stability requirement of lifting, perform lift heavy work.
Judge similar with above-mentioned antioverloading, because the distance of weight to the center of gyration on jib and pump truck chassis can calculate in real time based on the data of jib angular transducer, also can be the input value of user, so the anti-tipping judgement in the present embodiment, can for not carrying out in the same time.Additionally, if carry out anti-tipping judgement in real time, can arrange bearing force sensor on the supporting leg of support system, according to the stressed center of gravity calculating construction machinery and equipment of supporting leg, line stabilization of going forward side by side judges.
In lift heavy process, the continuous Information Monitoring of each sensor, and based on the input information of user, controller continues to judge
Ensure that lift heavy operation completes when jib intensity and whole vehicle stability all allow.
Below the derricking gear be arranged in the present embodiment on pumping vehicle arm rack is described in detail.
For ensureing the lift heavy adapting to various operating mode, the quantity of derricking gear does not limit.Described derricking gear form can have multiple, such as, can be cellular type derricking gear, removable derricking gear, pulley-type derricking gear.
As shown in Fig. 4, be cellular type derricking gear, it mainly includes one and arranges porose bearing plate 402, and bearing plate 402 is directly welded on jib, and the effect of mounting weight is played in the hole on bearing plate 402.
As shown in Fig. 5, be removable derricking gear, it comprises locating plate 502 and weight body 504 two parts.Locating plate 502 is welded on jib, in order to limit the movement of weight body 504 on jib, weight body 504 is detachably arranged on locating plate 502 by bolt, weight body 504 is arranged porose, for hoisting heavy, it is steadily arranged between locating plate when lift heavy operation.
As shown in Fig. 6, be pulley-type derricking gear, it forms primarily of pulley 602, steel cable 604 and suspension hook 606.Described pulley 602 is contained on jib in advance, described steel cable 604 and suspension hook 606 dispensing when pump truck dispatches from the factory, suspension hook 606 can mount weight, and pulley 602 one end connecting shackle 606, the other end can connect hoisting mechanism, with the position by pulling steel cable 604 to move the weight that suspension hook 606 mounts.
In sum, by above technical scheme, can realize a kind of construction machinery and equipment, advantage is: utilize articulated boom, can carry out hoisting operation in the unapproachable narrow regions of telescopic boom; The load-carrying ability of Appropriate application pump truck, expands the function of pump truck; Can prevent jib overload and pump truck from tumbling.
Detailed description of the invention of the present invention does not form the restriction to the application's scope; within every spirit in the present invention's design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection scope of the present invention.
Claims (5)
1. a construction machinery and equipment derricking gear, it is characterized in that, comprise boom system, boom system is provided with at least one derricking gear and safety control system thereof, described lifting safety control system comprises lifting force sensor, controller, supporting leg linear transducer and supporting leg angular transducer; Described derricking gear is cellular type derricking gear, one of removable derricking gear and pulley-type derricking gear or combination; Cellular type derricking gear comprises bearing plate, removable derricking gear, locating plate and weight body, and wherein, described locating plate is welded on the jib of described boom system, and described weight body is detachably connected on described locating plate, and described load-bearing is provided with hole; Pulley-type derricking gear, comprise one or more pulley, steel cable, suspension hook, described one or more pulley can be rotatably set on the jib of described boom system, described one or more pulley walked around by described steel cable, one end of described steel cable connects described suspension hook, and the other end is connected to the hoisting mechanism on construction machinery and equipment derricking gear.
2. according to a kind of construction machinery and equipment derricking gear described in claim 1, it is characterized in that, described controller is also for the weight according to described weight, and described weight to the distance of the center of gyration on described boom system and described construction machinery and equipment derricking gear chassis determines the heavy burden moment of described boom system, and according to the moment upper limit of described heavy burden moment and described boom system, safety control is carried out to the lifting operation of weight.
3. according to a kind of construction machinery and equipment derricking gear described in claim 1, it is characterized in that, described lifting safety control system also comprises jib angular transducer, for detecting the rotational angle of described more piece jib, to determine the attitude of described boom system.
4. according to a kind of construction machinery and equipment derricking gear described in claim 1, it is characterized in that, described lifting safety control system also comprises bearing force sensor, for detecting the bearing force of each supporting leg of described support system, the described bearing force of described controller according to each supporting leg and the support scope of described support system, calculate the overall center of gravity of described construction machinery and equipment derricking gear and described weight.
5. according to a kind of construction machinery and equipment derricking gear described in claim 2, it is characterized in that, described controller hangs according to the target that user is arranged and send position, determine that described weight is hung and deliver to that described target is hung when sending position, described weight is to the distance of the center of gyration on described boom system and described construction machinery and equipment derricking gear chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417903.4A CN105000478A (en) | 2015-07-16 | 2015-07-16 | Lifting mechanism for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417903.4A CN105000478A (en) | 2015-07-16 | 2015-07-16 | Lifting mechanism for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105000478A true CN105000478A (en) | 2015-10-28 |
Family
ID=54373403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510417903.4A Pending CN105000478A (en) | 2015-07-16 | 2015-07-16 | Lifting mechanism for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105000478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112141895A (en) * | 2020-11-24 | 2020-12-29 | 湖南三一中型起重机械有限公司 | Method for measuring stress of supporting leg of crane |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321302A (en) * | 1992-05-18 | 1993-12-07 | Yutani Heavy Ind Ltd | Hydraulic shovel also useable as crane |
| NL9401892A (en) * | 1994-11-14 | 1996-06-03 | Hyva International Inc N V | Hoisting system provided with a lorry and a hydraulic crane |
| US6202013B1 (en) * | 1998-01-15 | 2001-03-13 | Schwing America, Inc. | Articulated boom monitoring system |
| CN102774757A (en) * | 2012-08-07 | 2012-11-14 | 三一重工股份有限公司 | Engineering machinery |
| CN103114727A (en) * | 2013-02-05 | 2013-05-22 | 中联重科股份有限公司 | Method, device and system for arm support tail end motion control and vehicle with multiple sections of arm supports |
-
2015
- 2015-07-16 CN CN201510417903.4A patent/CN105000478A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321302A (en) * | 1992-05-18 | 1993-12-07 | Yutani Heavy Ind Ltd | Hydraulic shovel also useable as crane |
| NL9401892A (en) * | 1994-11-14 | 1996-06-03 | Hyva International Inc N V | Hoisting system provided with a lorry and a hydraulic crane |
| US6202013B1 (en) * | 1998-01-15 | 2001-03-13 | Schwing America, Inc. | Articulated boom monitoring system |
| CN102774757A (en) * | 2012-08-07 | 2012-11-14 | 三一重工股份有限公司 | Engineering machinery |
| CN103114727A (en) * | 2013-02-05 | 2013-05-22 | 中联重科股份有限公司 | Method, device and system for arm support tail end motion control and vehicle with multiple sections of arm supports |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112141895A (en) * | 2020-11-24 | 2020-12-29 | 湖南三一中型起重机械有限公司 | Method for measuring stress of supporting leg of crane |
| CN112141895B (en) * | 2020-11-24 | 2021-02-23 | 湖南三一中型起重机械有限公司 | Method for measuring stress of supporting leg of crane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102774757B (en) | Engineering machinery | |
| EP2530046B1 (en) | Stepless luffing mechanism for super-lifting counterweight of crawler crane and operating method thereof | |
| CN101920914A (en) | Vehicle-type upper rotating tower crane | |
| CN208120594U (en) | A kind of section of jurisdiction for subway work vertical transport system automatically grabs handler | |
| KR20170038840A (en) | Truck-mounted concrete pump and method for operating same | |
| CN106829741A (en) | Driving tele-control system and control method | |
| US20030168421A1 (en) | Telehandler crane apparatus | |
| CN208120584U (en) | It is a kind of to turn over slag device for subway work vertical transport system | |
| CN105000478A (en) | Lifting mechanism for engineering machinery | |
| US20230018143A1 (en) | Work machine and mobile crane | |
| CN103253602B (en) | The elevated super lifting device of crawler vehicle voluntarily and hoisting crane | |
| TWM605945U (en) | Mobile crane with anti-overturn monitoring function and anti-overturn monitoring device thereof | |
| CN112573396A (en) | Lifting capacity system for a hoisting machine | |
| CN103318778B (en) | Double; two arm movable arm tower cranes and control method thereof | |
| WO2019004958A2 (en) | Tow truck capable to rotate vehicle in air | |
| JP2020007144A (en) | Position adjustment assisting device, mobile crane and weight connecting method | |
| KR102005853B1 (en) | Apparatus for detecting swaying telescoping cage of tower crane | |
| WO2019132801A1 (en) | Tow truck rotator with knuckle boom crane capable of turning the vehicle in air, mounted on the rear axis | |
| JPH02182695A (en) | Jib connecting device to extension boom top end | |
| CN112125182A (en) | Self-walking crane protection system | |
| CN112299251A (en) | Improved arm with two or more hooks | |
| JP4913776B2 (en) | Automatic lifting control method and automatic lifting control system for mobile power generator | |
| CN103847591A (en) | Balancing detecting balance weight dumping car | |
| KR20190096087A (en) | Apparatus for detecting inclination of object to be moved by tower crane | |
| CN103847556A (en) | Three-way monitoring tilting cart with counterweights |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151028 |