CN202864749U - Stretching arm type crane - Google Patents
Stretching arm type crane Download PDFInfo
- Publication number
- CN202864749U CN202864749U CN 201220595304 CN201220595304U CN202864749U CN 202864749 U CN202864749 U CN 202864749U CN 201220595304 CN201220595304 CN 201220595304 CN 201220595304 U CN201220595304 U CN 201220595304U CN 202864749 U CN202864749 U CN 202864749U
- Authority
- CN
- China
- Prior art keywords
- arm
- auxiliary
- pulley
- brace
- winch
- 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 - Lifetime
Links
Images
Landscapes
- Jib Cranes (AREA)
Abstract
The utility model provides a stretching arm type crane, which is characterized by comprising a lower trolley, a rotary machine located on the lower trolley, a main arm arranged above the rotary machine in a hinging manner, a secondary arm, a first supporting arm, a second supporting arm, a main arm variable amplitude mechanism, a secondary arm variable amplitude mechanism, a hoisting mechanism and a control system, wherein the secondary arm, the first supporting arm and the second supporting arm are hinged with the upper part of the main arm; the main arm and the secondary arm are sequentially sleeved together through at least two sections, and consist of stretching arm sections capable of doing relative displacement motion along an axial direction; and the variable amplitude angle range of the main arm is 0-90 degrees.
Description
Technical field
The utility model relates to a kind of hoisting hook and carries equipment, specifically relates to a kind of Telescopic crane.
Background technology
In the prior art, causing lifting construction floor area problems of too because jib is long is the problem that goliath can not be avoided, and particularly large height crawler crane performance is particularly evident.Take large-scale crawler crane as example: in order to reach the superelevation hoisting height, except principal arm increases standard knot, also need to set up auxiliary at the top of principal arm and increase hoisting height.After principal arm, auxiliary installed, by luffing mechanism with principal arm, auxiliary is whole or successively cocked after carry out slinger's work.Before not cocked, principal arm and auxiliary are all lain prone on the ground so, and its required place is naturally larger.If narrow space then faces the embarrassment that can't construct.Arm tower crane is also arranged, replace principal arm with liftable body of the tower, though solved the occupation of land problem of body of the tower, the jib problem is still unresolved, and the falling and erect and then must large-scalely hang the equipment of carrying and assist and can finish of body of the tower.Also or have GTK1100 body of the tower jib entirely to adopt telescopic structure, but its body of the tower can not luffing, can not turn round, and jib can not can not show comparatively significantly beneficial effect with body of the tower simultaneous retractable or simultaneous retractable.
Summary of the invention
The purpose of this utility model provides a kind of Telescopic crane for existing weak point in the above-mentioned prior art just.
The purpose of this utility model can realize by following technique measures:
Telescopic crane of the present utility model comprises the revolution board getting off, be seated on getting off, is arranged on principal arm, the auxiliary that is hinged on principal arm top and first, second brace and main arm amplitude-changing mechanism, auxiliary luffing mechanism, lifting mechanism and the control system of revolution board front upper place in hinged way; Described principal arm and auxiliary are all nested together successively by at least two joints and can axially form as the telescopic boom joint that relative displacement moves along it; Principal arm change angle scope is 0 ~ 90 °.
Principal arm described in the utility model and auxiliary are the telescopic boom of truss structure; Described main arm amplitude-changing mechanism is comprised of the winch, support, pulley and the steel rope that are installed on the revolution board, wherein steel rope is walked around successively winch, is fixed on assembly pulley on the support, is connected to the assembly pulley that principal arm is gone up a joint telescopic boom joint end most, jointly consists of a pulley mechanism; Described auxiliary luffing mechanism mainly by the winch that is installed in revolution board middle part top, be hinged on principal arm top first, second brace 4,5 and pulley and steel rope form, wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace; With pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the board.
Principal arm described in the utility model is the telescopic boom of case structure; Auxiliary is for being the telescopic boom of truss structure; Described main arm amplitude-changing mechanism is made of the hinged amplitude oil cylinder of a bottom joint telescopic boom joint of an end and the hinged other end of board and principal arm; Described auxiliary luffing mechanism mainly is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board, and wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace; With pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the board.
Getting off described in the utility model is crawler-type traveling chassis or Wheel type travelling chassis.
Described auxiliary luffing mechanism mainly is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board; Wherein first, second brace is rigidly connected, and the second brace and auxiliary are rigidly connected, and the first brace is connected with pulley one by drag-line or arm-tie, and pulley two is connected on the board by drag-line or arm-tie; Steel rope is walked around winch, pulley one, pulley two successively, jointly consists of a pulley mechanism; Wherein winch is fixed on the board.
The beneficial effects of the utility model are as follows:
Hoisting crane of the present utility model not only has compared to existing technology installs little, the easily characteristics of cutting to of floor area when carrying of hanging, and can make work efficiency be able to obvious raising.
Description of drawings
Fig. 1 is a kind of embodiment structural representation of the present utility model.
Sequence number among the figure: 1: get off; 2: principal arm; 3: auxiliary; Brace in 4: the second; Brace in 5: the first; 6: support; 7: board.
Fig. 2 is the second embodiment structural representation of the present utility model.
Sequence number among the figure: 1: get off; 2: principal arm; 3: auxiliary; Brace in 4: the second; Brace in 5: the first; 7: board; 8: amplitude oil cylinder.
Fig. 3, Fig. 4 are the amplitude changing process scheme drawings.
Fig. 5 is the third embodiment structural representation of the present utility model.
Sequence number among the figure: 1: get off; 2: principal arm; 3: auxiliary; Brace in 4: the second; Brace in 5: the first; 6: support; 7: board.
Fig. 6 is the 4th kind of embodiment structural representation of the present utility model.
Sequence number among the figure: 1: get off; 2: principal arm; 7: board; 10: the second luffing mechanisms; 11: the first luffing mechanisms; 12: Shears; 13: lifting mechanism.
Fig. 7 is that the first luffing mechanism is the structural representation of amplitude oil cylinder in the 4th kind of embodiment of the present utility model.
Sequence number among the figure: 8: amplitude oil cylinder.
Fig. 8 is auxiliary luffing mechanism the second structural representation described in of the present utility model the 1st, 2,3 kind of embodiment.
Sequence number among the figure: 14: pulley one; 15: pulley two.
The specific embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
Embodiment 1:
As shown in Figure 1, the Telescopic crane of present embodiment comprises as 1 the crawler-type traveling chassis of getting off, is seated in revolution board 7 on getting off, is arranged on principal arm 2, the auxiliary 3 that is hinged on principal arm top and first, second brace 4,5 and main arm amplitude-changing mechanism, auxiliary luffing mechanism, lifting mechanism and control system of revolution board front upper place in hinged way; Described principal arm and auxiliary are all nested together successively by at least two joints and can form along the telescopic boom of its truss structure that axially moves as relative displacement; Principal arm change angle scope is 0 ~ 90 °; Described main arm amplitude-changing mechanism is comprised of the winch that is installed in revolution board back upper place, the support 6, pulley and the steel rope that are installed in top, revolution board middle part, wherein steel rope is walked around successively winch, is fixed on assembly pulley on the support, is connected to the assembly pulley that principal arm is gone up a joint telescopic boom joint end most, jointly consists of a pulley mechanism; Described auxiliary luffing mechanism mainly by the winch that is installed in revolution board middle part top, be hinged on principal arm top first, second brace 4,5 and pulley and steel rope form, wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace, with pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the revolution board.
Present embodiment is before work is set up in installation, and principal arm and auxiliary are in full reduced state, and the winch tractive steel rope in the main arm amplitude-changing mechanism is cocked to the rear hold mode of certain angle (this angle is between 0 °-90 °) with principal arm by the pulley mechanism of its composition; Telescoping mechanism by principal arm inside makes its elongation, reaches locked fixed length after the designated length (in this process, auxiliary is fixed on the principal arm upper end all the time).Auxiliary makes its elongation by its inner telescoping mechanism, reaches locked fixed length behind the certain-length (this moment, two telescopic booms were all realized the variation of length, and the prior art beneficial effect is obvious relatively).At this moment, utilize winch tractive steel rope in the auxiliary luffing mechanism to realize luffing to auxiliary.Realize lifting by lifting mechanism, by 360 ° of revolutions of board, drive it on principal arm and auxiliary and jointly turn round and enlarge the lifting area.In this process because auxiliary inside is provided with telescoping mechanism, so the flexible impact that can not be subjected to main arm telescoping of auxiliary, can with the principal arm simultaneous retractable, also can after main arm telescoping is finished, stretch again, also or flexible in the process of principal arm luffing; Because auxiliary inside is provided with independently telescoping mechanism, so, auxiliary can also be after flexible luffing again, also can again elongation behind luffing, its sequencing is decided on need of work, and is flexible and changeable.In the whole process, it is flexible, luffing, the action such as turn round, hoist are carried out relevant action by control system response command adapted thereto and realized.
In receiving the arm process, at first put rope by the first auxiliary luffing mechanism, the first auxiliary luffing mechanism hold mode when reaching certain angle (if continue luffing, the angle between the first brace and the principal arm is excessive again, easily unstability).Start the second auxiliary luffing mechanism and make auxiliary continue to fall, until to vertical state.So adopt the described auxiliary luffing mechanism of this embodiment, can easily make auxiliary reach vertical state, when reaching vertical state, when principal arm was retracted, auxiliary can be retracted simultaneously, and occupied ground is less, beneficial effect more obvious (referring to Fig. 3,4).
Embodiment 2:
As shown in Figure 2, the Telescopic crane of present embodiment comprises as 1 the Wheel type travelling chassis of getting off, is seated in revolution board 7 on getting off, is arranged on principal arm 2, the auxiliary 3 that is hinged on principal arm top and first, second brace 5 on the revolution board, 4 and main arm amplitude-changing mechanism, auxiliary luffing mechanism, lifting mechanism and control system in hinged way; Described principal arm and auxiliary are all nested together successively by at least two joints and can axially form as the telescopic boom joint that relative displacement moves along it; Principal arm change angle scope is 0 ~ 90 °; More specifically, described principal arm is the telescopic boom of case structure; Auxiliary is for being the telescopic boom of truss structure; Described main arm amplitude-changing mechanism is made of the hinged amplitude oil cylinder 8 of a bottom joint telescopic boom joint that an end and turn-around machine table-hinges connect the other end and principal arm; Described auxiliary luffing mechanism mainly by being installed in the winch of revolution on the board, being hinged on first, second brace on the principal arm and pulley and steel rope and forming, wherein walk around successively winch, be fixed on the assembly pulley in the first brace and the second brace by steel rope; With pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the board.
Present embodiment is before lifting work, principal arm and auxiliary are in full reduced state, principal arm amplitude oil cylinder elongation is cocked locked fixing behind the certain angle (this angle is between 0 °-90 °) with principal arm, and the telescoping mechanism by principal arm inside makes its elongation, reaches locked fixed length after the designated length.Auxiliary makes its elongation by its inner telescoping mechanism, reaches locked fixed length behind the certain-length.Utilize the winch tractive steel rope in the auxiliary luffing mechanism this moment, realize the auxiliary luffing; Realize lifting by lifting mechanism, board takes up principal arm and 360 ° of revolutions of auxiliary on it, enlarges the lifting working area.In this process, auxiliary can extend simultaneously along with the elongation of principal arm.Auxiliary can also be after elongation luffing again, also can again elongation behind luffing, its sequencing is decided by need of work.
As shown in Figure 5, the difference of present embodiment and embodiment 1 is that described principal arm is the truss-like principal arm of single-unit structure.The auxiliary luffing mechanism mainly is comprised of winch, front brace, rear brace, pulley and steel rope; Wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace, jointly consists of pulley mechanism; The second brace is connected with the end of auxiliary by drag-line or arm-tie, and winch is fixed on the board.
Before lifting work, auxiliary is in full reduced state, and the winch tractive steel rope in the main arm amplitude-changing mechanism is cocked to the rear hold mode of certain angle (this angle is between 0 °-90 °) with principal arm by the pulley mechanism of its composition; Auxiliary makes its elongation by its inner telescoping mechanism, reaches locked fixed length behind the certain-length.At this moment, utilize winch tractive steel rope in the auxiliary luffing mechanism to realize luffing to auxiliary.
In receiving the arm process, at first the telescoping mechanism by auxiliary is retracted auxiliary, auxiliary luffing then, rear principal arm luffing; Perhaps, at first the auxiliary luffing is regained the principal arm luffing; Perhaps: the principal arm luffing, auxiliary is retracted, the auxiliary luffing.
As shown in Figure 6, present embodiment is the special case that the utility model is created, its essence is a kind of telescopic boom crawler crane, its mainly by as 1 the crawler-type traveling chassis of getting off, be seated in the 360 ° of rotating revolution boards 7 of upper energy of getting off, be arranged on the truss telescopic main arm 2, Shears 12 of board top and form with the first luffing mechanism 11, the second luffing mechanism 10, lifting mechanism 13 and the control system etc. that are fixed on the board in hinged way; Described principal arm is that a kind of two joints that are no less than nest together and can be along its axially extended truss-type telescopic arm successively; One end of described the first luffing mechanism is connected with the underarm joint of principal arm middle section size maximum; The second luffing mechanism is connected with the upper arm joint of principal arm middle section size minimum by steel rope; Principal arm inside is provided with telescoping mechanism.The first luffing mechanism is the mechanism that is comprised of winch, pulley and steel rope, and the two ends of steel rope are connected with the first arm joint of principal arm middle section size maximum by pulley respectively; The second luffing mechanism is the mechanism that is comprised of winch, Shears, pulley and steel rope, and the two ends of steel rope are connected with the final section arm joint of principal arm middle section size minimum by Shears, pulley respectively; Winch is fixed on the board.
Before the lifting work, principal arm is in full reduced state (floor area is relatively little a lot), the winch tractive steel rope in the first luffing mechanism, so that principal arm is cocked to the rear hold mode of certain angle (this angle is between 0 °-90 °); Telescoping mechanism by principal arm inside makes its elongation, reaches locked fixed length after the designated length, makes jib become as a whole and satisfies the strength and stiffness requirement.Realize the principal arm luffing by the second luffing mechanism tractive principal arm; Realize lifting by lifting mechanism, by 360 ° of revolutions of board, take up that principal arm and auxiliary turn round jointly it on, realize lifting working area.In this process, when the second luffing mechanism worked to jib, the first luffing mechanism was removed the constraint to principal arm thereupon; Or it is synchronous by control system first, second luffing mechanism to be realized, jointly principal arm is carried out luffing.
As shown in Figure 7, in this embodiment, the first luffing mechanism can be replaced by the amplitude oil cylinder 8 that an end is hinged on the underarm joint that the other end on the board is hinged on principal arm middle section size maximum.
As shown in Figure 8, auxiliary luffing mechanism described in the embodiment 1,2,3 mainly is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board; Wherein first, second brace is rigidly connected, and the second brace and auxiliary are rigidly connected, and the first brace is connected with pulley 1 by drag-line or arm-tie, and pulley 2 15 is connected on the board by drag-line or arm-tie; Steel rope is walked around winch, pulley one, pulley two successively, jointly consists of a pulley mechanism; Wherein winch is fixed on the board.
Claims (6)
1. telescopic arm crane is characterized in that: described hoisting crane comprises the revolution board getting off, be seated on getting off, is arranged on principal arm, the auxiliary that is hinged on principal arm top and first, second brace and main arm amplitude-changing mechanism, auxiliary luffing mechanism, lifting mechanism and the control system of revolution board top in hinged way; Described principal arm and auxiliary are all nested together successively by at least two joints and can axially form as the telescopic boom joint that relative displacement moves along it; Principal arm change angle scope is 0 ~ 90 °.
2. telescopic arm crane according to claim 1, it is characterized in that: described principal arm and auxiliary are the telescopic boom of truss structure; Described main arm amplitude-changing mechanism is comprised of the winch, support, pulley and the steel rope that are installed on the revolution board, wherein steel rope is walked around successively winch, is fixed on assembly pulley on the support, is connected to the assembly pulley that principal arm is gone up a joint telescopic boom joint end most, jointly consists of a pulley mechanism; Described auxiliary luffing mechanism mainly is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board, and wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace; With pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the board.
3. telescopic arm crane according to claim 1, it is characterized in that: described principal arm is the telescopic boom of case structure; Auxiliary is the telescopic boom of truss structure; Described main arm amplitude-changing mechanism is made of the hinged amplitude oil cylinder of a bottom joint telescopic boom joint of an end and the hinged other end of board and principal arm; Described auxiliary luffing mechanism mainly is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board, and wherein steel rope is walked around successively winch, is fixed on the assembly pulley in the first brace and the second brace; With pulley mechanism of the common formation of auxiliary; Wherein the second brace and auxiliary are rigidly connected; Winch is fixed on the board.
4. telescopic arm crane according to claim 1, it is characterized in that: described getting off is the crawler-type traveling chassis.
5. telescopic arm crane according to claim 1, it is characterized in that: described getting off is Wheel type travelling chassis.
6. telescopic arm crane according to claim 1 is characterized in that: described auxiliary luffing mechanism is comprised of winch, first, second brace that is hinged on principal arm top and the pulley and the steel rope that are installed on the revolution board; Wherein first, second brace is rigidly connected, and the second brace and auxiliary are rigidly connected, and the first brace is connected with pulley one by drag-line or arm-tie, and pulley two is connected on the board by drag-line or arm-tie; Steel rope is walked around winch, pulley one, pulley two successively, jointly consists of a pulley mechanism; Wherein winch is fixed on the board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595304 CN202864749U (en) | 2012-11-13 | 2012-11-13 | Stretching arm type crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595304 CN202864749U (en) | 2012-11-13 | 2012-11-13 | Stretching arm type crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202864749U true CN202864749U (en) | 2013-04-10 |
Family
ID=48031489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220595304 Expired - Lifetime CN202864749U (en) | 2012-11-13 | 2012-11-13 | Stretching arm type crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202864749U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923585A (en) * | 2012-11-13 | 2013-02-13 | 郑州新大方重工科技有限公司 | Telescopic crane |
| CN103601085A (en) * | 2013-11-27 | 2014-02-26 | 三一汽车起重机械有限公司 | Telescopic arm device and engineering vehicle |
| CN103601082A (en) * | 2013-11-22 | 2014-02-26 | 中联重科股份有限公司 | Crane and arm rising method thereof |
| CN105384090A (en) * | 2014-08-20 | 2016-03-09 | 利勃海尔-韦尔克埃英根有限公司 | Automatic erecting of a crane |
| CN107117542A (en) * | 2017-06-30 | 2017-09-01 | 徐州重型机械有限公司 | Crane |
| CN107140557A (en) * | 2017-06-12 | 2017-09-08 | 徐州重型机械有限公司 | The special jib structure of wind-powered electricity generation and crane |
| CN107337123A (en) * | 2017-06-16 | 2017-11-10 | 徐州重型机械有限公司 | Boom system and crane |
| CN108163724A (en) * | 2017-12-22 | 2018-06-15 | 玉林市玉州区万通华信科技服务部 | A kind of defeated tank capital construction lifting gear of collection |
-
2012
- 2012-11-13 CN CN 201220595304 patent/CN202864749U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923585A (en) * | 2012-11-13 | 2013-02-13 | 郑州新大方重工科技有限公司 | Telescopic crane |
| CN103601082A (en) * | 2013-11-22 | 2014-02-26 | 中联重科股份有限公司 | Crane and arm rising method thereof |
| CN103601082B (en) * | 2013-11-22 | 2015-06-17 | 中联重科股份有限公司 | Crane and arm rising method thereof |
| CN103601085A (en) * | 2013-11-27 | 2014-02-26 | 三一汽车起重机械有限公司 | Telescopic arm device and engineering vehicle |
| CN103601085B (en) * | 2013-11-27 | 2015-08-12 | 三一汽车起重机械有限公司 | Telescopic boom device and engineering truck |
| CN105384090A (en) * | 2014-08-20 | 2016-03-09 | 利勃海尔-韦尔克埃英根有限公司 | Automatic erecting of a crane |
| CN105384090B (en) * | 2014-08-20 | 2018-11-30 | 利勃海尔-韦尔克埃英根有限公司 | The auto-erecting of crane |
| CN107140557A (en) * | 2017-06-12 | 2017-09-08 | 徐州重型机械有限公司 | The special jib structure of wind-powered electricity generation and crane |
| WO2018227919A1 (en) * | 2017-06-12 | 2018-12-20 | 徐州重型机械有限公司 | Special wind-power boom structure and crane |
| CN107337123A (en) * | 2017-06-16 | 2017-11-10 | 徐州重型机械有限公司 | Boom system and crane |
| CN107117542A (en) * | 2017-06-30 | 2017-09-01 | 徐州重型机械有限公司 | Crane |
| CN108163724A (en) * | 2017-12-22 | 2018-06-15 | 玉林市玉州区万通华信科技服务部 | A kind of defeated tank capital construction lifting gear of collection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202864749U (en) | Stretching arm type crane | |
| CN102923585A (en) | Telescopic crane | |
| CN202369282U (en) | Movable crane | |
| CN102718156B (en) | Crane arm support system and crane | |
| CN105226560B (en) | A kind of crossing frame and its construction method | |
| CN204714403U (en) | A kind of extension mast and configure the engineering machinery vehicle of this mast | |
| CN103510864B (en) | One kind three saves hydraulically extensible suit derrick | |
| CN203255892U (en) | Heightened gantry type crane | |
| CN102303821B (en) | Luffing tower crane with balanced type suspension arm based on traction luffing of steel rope | |
| CN103422662A (en) | Integral mobile construction platform for cast-in-place of elevator shaft and method for using same | |
| CN108249323A (en) | A kind of folding arm loop wheel machine peculiar to vessel | |
| CN202296907U (en) | Suspension arm balanced movable arm tower crane capable of luffing based on steel rope traction | |
| CN104495653B (en) | A kind of multi-functional large-tonnage erecting crane and beam erecting method | |
| CN101955133B (en) | Movable crane | |
| CN202611340U (en) | Self-propelled road bed protective barrier transportation and installation all-in-one machine | |
| CN203213614U (en) | Material distribution car | |
| CN202744232U (en) | Tower crane long suspension arm lifting steel rope supporting device | |
| CN202465099U (en) | Single-girder partial hanging gantry crane | |
| CN101077757A (en) | Light folding arm type tower crane | |
| CN110526137A (en) | A kind of certainly mobile type fast erecting tower crane | |
| CN203531759U (en) | Three-section hydraulic telescopic headframe | |
| CN208346816U (en) | A kind of rapid-dismounting foldable type piling machine | |
| CN203430008U (en) | Integrally movable type construction platform for cast-in-situ of elevator shaft | |
| CN207312966U (en) | A kind of crane hook anti-drop device for building | |
| CN102328883B (en) | Telescopic importing system and crane with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |