CN104326384A - Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane - Google Patents
Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane Download PDFInfo
- Publication number
- CN104326384A CN104326384A CN201410564277.7A CN201410564277A CN104326384A CN 104326384 A CN104326384 A CN 104326384A CN 201410564277 A CN201410564277 A CN 201410564277A CN 104326384 A CN104326384 A CN 104326384A
- Authority
- CN
- China
- Prior art keywords
- pointer
- multiple spot
- inhibiting device
- mast
- base
- 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.)
- Granted
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
- B66C23/88—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
- B66C23/60—Derricks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses an over-pitching-up-proof multi-point limiting device with an adjustable over-fall angle. The over-pitching-up-proof multi-point limiting device comprises a base (1), a pointer (2), a first bent plate (31) and a second bent plate (32), wherein the upper end of the pointer (2) is in rotational connection with the base (1) to form a swinging center and the lower end of the pointer (2) can wind around a free swinging end of the swinging center and points to an angle scale range on the base (1); the first bent plate (31) is provided with a first slide groove (61); the pointer (2) penetrates through the first slide groove (61); the second bent plate (32) is provided with a second slide groove (62); the second slide groove (62) is provided with approach switches which are located on the two sides respectively and have adjustable positions; and the swinging track of the lower end of the pointer (2) is located in a detection range of the approach switches. According to the device, a swinging angle range of a mast is limited so that safety guarantees can be effectively and reliably provided for a mast hanging function; and a mast angle sensor can be replaced so that the design cost is effectively reduced. The invention further discloses a crawler crane provided with the multi-point limiting device.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly the anti-mistake of crawler crane faced upward the multiple spot inhibiting device putting adjustable angle.The invention still further relates to the crawler crane being provided with described inhibiting device.
Background technology
The transition of crawler crane is by disassembling the transport of rear sub-unit, after arriving destination, and mode of operation of being allowed for access after needs re-assembly.
Reduce the time of disassembling and assembling and the degree of convenience improved in this process, can crawler crane be made to enter mode of operation as early as possible by actv., the practical efficiency of effective raising crawler crane, make the benefit of user, it is the constructional device and the hydraulic efficiency pressure system that utilize crawler crane self that mast hangs, realize the simple and easy hoisting mode of auxiliary disassembling and assembling, effectively can reduce the expense of additionally renting whipline of user.
The limit function that current mast hangs, mainly adopts the mode of setting angle sensor on mast, the angle signal of controller acquisition angles sensor, judges that mast hangs whether be in safty hoisting state by controller.
Due to mast hang only for crawler crane tear car and entrucking open time track beam installation, Occupation coefficient is not high, and angular transducer is expensive, the limit function only for hanging in mast obviously cannot play the peak use rate of angular transducer, is all a kind of wastes from price and function.
Therefore, how under the prerequisite ensureing limit function, reducing inhibiting device cost as much as possible, is those skilled in the art's technical issues that need to address.
Summary of the invention
The first object of the present invention is to provide a kind of anti-mistake and faced upward the multiple spot inhibiting device putting adjustable angle.This device, by the pivot angle scope of restriction mast, effectively and failure-free provides safety control for mast hangs function, and can replace mast angular transducer, effectively reduce design cost.
The second object of the present invention is to provide a kind of crawler crane being provided with described inhibiting device.
For achieving the above object, the invention provides a kind of anti-mistake and faced upward the multiple spot inhibiting device putting adjustable angle, comprising:
Base;
Pointer, its upper end and described base rotation are connected to form center of oscillation, and lower end can freely swing around center of oscillation and hold and the angle index region be directed on described base;
First bent plate, is fixed on described base, which is provided with the first chute, and described pointer is through described first chute;
Second bent plate, is fixed on described base, which is provided with the second chute, and described second chute is provided with and lays respectively at both sides and the adjustable proximity switch in position, and the swinging track of described pointer lower end is positioned within the detection range of described proximity switch.
Preferably, described first chute and the second chute are slotted hole.
Preferably, the center of circle of described first bent plate, the second bent plate overlaps with the center of oscillation of described pointer.
Preferably, the arc length of described second bent plate and radius are greater than described first bent plate.
Preferably, described pointer upper end is connected with base rotation with bolt by stud, and described stud welding is on described base, and described bolt screws in described stud through the through hole of described pointer upper end.
Preferably, described pointer is rounded or spherical close to the position of lower end.
Preferably, two described proximity switches are respectively equipped with the baffle plate of hand motion scope under restriction mode of operation.
Preferably, described baffle plate is bending-like, comprises the lower hem be sleeved on proximity switch, is positioned at the side plate outside proximity switch test side, and corresponds to the upper hem of described pointer, is stopped at the upper hem of described baffle plate when described pointer triggers proximity switch.
For realizing above-mentioned second object, the present invention also provides a kind of crawler crane, the mast comprising turntable and be rotationally connected with described turntable, and the side anti-mistake be provided with described in above-mentioned any one of described mast faced upward the multiple spot inhibiting device putting adjustable angle.
Preferably, the side of described mast is provided with welded plate, and described multiple spot inhibiting device is installed on described welded plate.
The present invention is under ensureing that mast hangs the prerequisite of safty hoisting, on the one hand by the pivot angle scope of restriction mast, can effectively and failure-free provides safety control for mast hangs function, avoid mast because crossing the steel rope put and promote and cause, assembly pulley or the impaired problem of luffing elevator, and the mast avoiding main transformer width to cross facing upward causing mast hypsokinesis to bring and jacking cylinder damage problem, thus effectively promote the safety of main amplitude mast operation, reliability, main amplitude mast angular transducer can be replaced on the other hand, because the cost of proximity switch is far below angular transducer, therefore effectively design cost can be reduced.
Crawler crane provided by the invention is provided with above-mentioned multiple spot inhibiting device, and because described multiple spot inhibiting device has above-mentioned technique effect, the crawler crane being provided with this multiple spot inhibiting device also should possess corresponding technique effect.
Accompanying drawing explanation
Fig. 1 provides by invention the structural representation of a kind of detailed description of the invention of multiple spot inhibiting device;
Fig. 2 is installed on the schematic diagram of crane mast for the inhibiting device of multiple spot shown in Fig. 1;
Fig. 3 is the close-up schematic view at A position in Fig. 2;
Fig. 4 is the control flow chart of the inhibiting device of multiple spot shown in Fig. 1.
In figure:
1. base 2. pointer 31. first bent plate 32. second bent plate 4. stud 5. bolt 61. first chute 62. second chute 71. first proximity switch 72. second proximity switch 81. first baffle plate 82. second baffle 811. lower hem 812. side plate 813. upper hem 9. welded plate 10. mast 11. luffing elevator 12. steel rope 13. turntable 14. assembly pulley
Detailed description of the invention
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 provides by invention the structural representation of a kind of detailed description of the invention of multiple spot inhibiting device.
In a kind of detailed description of the invention, anti-mistake provided by the present invention faced upward the multiple spot inhibiting device putting adjustable angle, formed primarily of parts such as base 1, pointer 2, first bent plate 31, second bent plates 32.
Wherein, the square that base 1 is placed in rotation 45 jiaos substantially, peripheral position is provided with three mounting holes, pointer 2 upper end and base 1 are rotationally connected formation center of oscillation at upper corner point, lower end can freely swing around center of oscillation and hold and the angle index region pointed in the middle part of base, angle index region indicates the angular dimension before mast and turntable, simultaneously as one reference during adjusting proximity switch, angular range is from 0 ° to 90 °, according to the difference of installation site, its scale value can increase from right to left gradually, also can increase gradually from left to right.
Particularly, pointer 2 is close to the position of lower end rounded or spherical (also can be other shapes), to make its center of gravity as much as possible on the lower, thus have under gravity and better swing performance, pointer 2 upper end is rotationally connected with base 1 by stud 4 and bolt 5, during installation, first stud 4 is vertically welded on base 1, then adopts bolt 5 to screw in stud 4 through the through hole of pointer 2 upper end.
First bent plate 31 is fixed on base 1; between pointer 2 center of oscillation and angle index region; which is provided with first chute 61 slightly wider than pointer 2 thickness; the shaft of pointer 2 is through described first chute 61; freely swing in the scope that can limit at the first chute 61; first bent plate 31 1 aspect is used for the range of movement of limit pointer 2, has a kind of protective effect on the other hand to pointer 2.
Second bent plate 32 is also fixed on base 1, be positioned at the below in angle index region, arc length and radius are all greater than the first bent plate 31, which is provided with the second chute 62, second chute 62 is provided with and lays respectively at both sides and adjustable the first proximity switch 71 and the second proximity switch 72 in position, the swinging track of pointer 2 lower end is positioned within the detection range of the first proximity switch 71 and the second proximity switch 72, proximity switch directly contacts just can realize connecting circuit without the need to carrying out machinery with movable parts pointer, thus sends detection signal.
Here, the first chute 61 and the second chute 62 are the slotted hole that the length direction along bent plate circular arc is offered.Certainly, except slotted hole, chute can also be other forms, such as, can process " U " shape groove in advance on the first bent plate 31 and the second bent plate 32, when it is fixed on base 1, closes " U " shape channel opening form chute by base 1; Or the second chute 62 is divided into two sections, be respectively used to installation first proximity switch 71 and the second proximity switch 72, etc.
The center of circle of above-mentioned first bent plate 31, second bent plate 32 overlaps with the center of oscillation of pointer 2, and namely three has the same center of circle.
First proximity switch 71 and the second proximity switch 72 are respectively equipped with the first baffle plate 81 and the second baffle 82 of pointer 2 range of movement under restriction mode of operation, first baffle plate 81 and second baffle 82 structurally specular, be only described its structure for the first baffle plate 81 below.
First baffle plate 81 is in bending-like, be positioned at the inner side of the second bent plate 32, structurally be divided into lower hem 811, be positioned at the side plate 812 outside proximity switch test side and correspond to the upper hem 813 of pointer, whole baffle plate is sleeved on the upper end of the first proximity switch 71 by the mounting hole on lower hem 811, can move with the first proximity switch 71 and regulate, the length of upper hem 813 is less than lower hem 811, its length should meet when pointer 2 triggers the first proximity switch 71, under its barrier effect, the requirement that pointer 2 can stop swinging.The object of such design is to prevent pointer 2 from continuing outwards to swing after triggering first proximity switch 71, again triggering the first proximity switch 71, thus occur flase alarm when returning.
Second chute 62 is for installing and adjusting proximity switch, first proximity switch 71 and the second proximity switch 72 are arranged in the second chute 62 respectively by fastener, its test side is upwards exposed, corresponding to pointer 2 lower end, the other end and wire are drawn downwards, when the needs adjusting proximity switch position, and first loosening fasteners, then with reference to the scale value of angle scale zone, proximity switch is slid into suitable position in the second chute 62, then tightening fastener parts again.
Please refer to Fig. 2, Fig. 3, Fig. 2 is installed on the schematic diagram of crane mast for the inhibiting device of multiple spot shown in Fig. 1; Fig. 3 is the close-up schematic view at A position in Fig. 2.
As shown in the figure, multiple spot inhibiting device is arranged on the side of crane mast, and below its base 1, a stacked block-shaped similar welded plate 9, after both interfix, then is welded on welded plate 9 on mast 10 together with the multiple spot inhibiting device on it.
During work, the luffing elevator 11 of hoisting crane rotates under the effect of hydraulic coupling, drives mast 10 to rotate around root hinge-point by steel rope 12, and now mast 10 can constantly change with the folder degree of turntable 13, when reaching permission lifting angle, control the flexible realization lifting of auxiliary cylinder.
In hoisting process, due to Action of Gravity Field, the pivot angle of the pointer 2 of multiple spot inhibiting device changes along with the luffing of mast 10.When 10, mast is raised to certain angle, because pointer 2 turns to directly over the first proximity switch 71, the first proximity switch 71 just can produce response electric signal; When mast 10 drops to certain angle, because pointer 2 turns to directly over the second proximity switch 72, second proximity switch 72 can produce response electric signal, the position of proximity switch is adjustable, the spacing of mast angle changing can be realized, due to the restriction of the first baffle plate 81 and second baffle 82, this detecting device only exists that the first proximity switch 71 responds, the second proximity switch 72 responds, all do not respond three kinds of states.
Please refer to Fig. 4, Fig. 4 is the control flow chart of the inhibiting device of multiple spot shown in Fig. 1.
As shown in the figure, when the first proximity switch 71 or the second proximity switch 72 respond, auxiliary cylinder is forbidden shrinking, thus the lifting that restriction mast hangs; When the first proximity switch 71 and the second proximity switch 72 all do not respond, auxiliary cylinder can shrink and extend, thus realizes the normal lifting work that mast hangs.
The present invention can avoid mast because crossing luffing elevator 11, steel rope 12 or the impaired problem of assembly pulley 14 of putting and promoting and causing, and the mast 10 avoiding main transformer width to cross facing upward causing mast 10 hypsokinesis to bring and jacking cylinder damage problem, therefore the safety of main amplitude mast 10 operation, reliability can effectively be promoted, can replace main amplitude mast angular transducer by actv., separate unit reduces costs.
Certainly, above-described embodiment is only preferred version of the present invention, is specifically not limited thereto, and can make pointed adjustment according to actual needs on this basis, thus obtain different embodiments.Such as, base designs is become fan-shaped, or the baffle design of proximity switch is become other shapes, or the position of proximity switch carries out regulating etc. by other means.Because mode in the cards is more, just casehistory no longer one by one here.
Except above-mentioned multiple spot inhibiting device, the present invention also provides a kind of crawler crane, the mast comprising turntable and be rotationally connected with described turntable, and the side of described mast is provided with anti-mistake mentioned above and faced upward the multiple spot inhibiting device putting adjustable angle, all the other structures please refer to prior art, repeat no more.
Above multiple spot inhibiting device provided by the present invention and crawler crane are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. anti-mistake faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, comprising:
Base (1);
Pointer (2), its upper end and described base (1) are rotationally connected formation center of oscillation, and lower end can freely swing around center of oscillation and hold and the angle index region pointed on described base (1);
First bent plate (31), is fixed on described base (1), which is provided with the first chute (61), and described pointer (2) is through described first chute (61);
Second bent plate (32), be fixed on described base (1), which is provided with the second chute (62), described second chute (62) is provided with and lays respectively at both sides and the adjustable proximity switch in position, and the swinging track of described pointer (2) lower end is positioned within the detection range of described proximity switch.
2. anti-mistake according to claim 1 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, described first chute (61) and the second chute (62) are slotted hole.
3. anti-mistake according to claim 1 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, the center of circle of described first bent plate (31), the second bent plate (32) overlaps with the center of oscillation of described pointer (2).
4. anti-mistake according to claim 1 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, the arc length of described second bent plate (32) and radius are greater than described first bent plate (31).
5. anti-mistake according to claim 1 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, described pointer (2) upper end is rotationally connected with base (1) by stud (4) and bolt (5), described stud (4) is welded on described base (1), and described bolt (5) screws in described stud (4) through the through hole of described pointer (2) upper end.
6. the anti-mistake according to any one of claim 1 to 5 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, described pointer (2) is rounded or spherical close to the position of lower end.
7. anti-mistake according to claim 1 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, two described proximity switches are respectively equipped with the baffle plate of hand motion scope under restriction mode of operation.
8. anti-mistake according to claim 7 faced upward the multiple spot inhibiting device putting adjustable angle, it is characterized in that, described baffle plate is bending-like, comprise the lower hem (811) be sleeved on proximity switch, be positioned at the side plate (812) outside proximity switch test side, and correspond to the upper hem (813) of described pointer (2), be stopped at the upper hem (813) of described baffle plate when described pointer (2) triggers proximity switch.
9. a crawler crane, the mast (10) comprising turntable (13) and be rotationally connected with described turntable, it is characterized in that, the side anti-mistake be provided with described in any one of the claims 1 to 8 of described mast (10) faced upward the multiple spot inhibiting device putting adjustable angle.
10. crawler crane according to claim 9, it is characterized in that, the side of described mast (10) is provided with welded plate (9), and described multiple spot inhibiting device is installed on described welded plate (9) by its base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410564277.7A CN104326384B (en) | 2014-10-21 | 2014-10-21 | Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410564277.7A CN104326384B (en) | 2014-10-21 | 2014-10-21 | Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104326384A true CN104326384A (en) | 2015-02-04 |
| CN104326384B CN104326384B (en) | 2017-04-26 |
Family
ID=52401216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410564277.7A Active CN104326384B (en) | 2014-10-21 | 2014-10-21 | Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104326384B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254893A (en) * | 2017-06-07 | 2017-10-17 | 龙工(上海)机械制造有限公司 | Two grades of limiting steering hydraulic systems of wheel loader |
| CN108358078A (en) * | 2018-01-19 | 2018-08-03 | 中联重科股份有限公司 | Arm support system, arm support amplitude variation control system and control method thereof |
| CN111495909A (en) * | 2020-03-20 | 2020-08-07 | 中国人民解放军陆军防化学院 | Metal cylinder decontamination device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859651A (en) * | 1974-01-14 | 1975-01-07 | Jr Thomas W Thomas | Boom angle indicator |
| CN201598126U (en) * | 2009-10-27 | 2010-10-06 | 徐州重型机械有限公司 | Super-hoisting variable amplitude limiting device and crane provided therewith |
| CN202245856U (en) * | 2011-08-18 | 2012-05-30 | 南通润邦重机有限公司 | Variable-amplitude limiting device of mast type offshore wind turbine installation crane |
| CN203582339U (en) * | 2013-09-06 | 2014-05-07 | 中联重科股份有限公司 | Amplitude-changing limiting device and movable arm tower crane |
| CN203667867U (en) * | 2014-01-23 | 2014-06-25 | 南通润邦重机有限公司 | Hoisting mechanical arm rest safety limit device |
| CN204281132U (en) * | 2014-10-21 | 2015-04-22 | 徐工集团工程机械股份有限公司 | A kind of anti-mistake faced upward the multiple spot inhibiting device and crawler crane of putting adjustable angle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3800425A (en) * | 1972-03-20 | 1974-04-02 | Jones Construction Co J | Boom orientation and load capacity indicator |
-
2014
- 2014-10-21 CN CN201410564277.7A patent/CN104326384B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859651A (en) * | 1974-01-14 | 1975-01-07 | Jr Thomas W Thomas | Boom angle indicator |
| CN201598126U (en) * | 2009-10-27 | 2010-10-06 | 徐州重型机械有限公司 | Super-hoisting variable amplitude limiting device and crane provided therewith |
| CN202245856U (en) * | 2011-08-18 | 2012-05-30 | 南通润邦重机有限公司 | Variable-amplitude limiting device of mast type offshore wind turbine installation crane |
| CN203582339U (en) * | 2013-09-06 | 2014-05-07 | 中联重科股份有限公司 | Amplitude-changing limiting device and movable arm tower crane |
| CN203667867U (en) * | 2014-01-23 | 2014-06-25 | 南通润邦重机有限公司 | Hoisting mechanical arm rest safety limit device |
| CN204281132U (en) * | 2014-10-21 | 2015-04-22 | 徐工集团工程机械股份有限公司 | A kind of anti-mistake faced upward the multiple spot inhibiting device and crawler crane of putting adjustable angle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254893A (en) * | 2017-06-07 | 2017-10-17 | 龙工(上海)机械制造有限公司 | Two grades of limiting steering hydraulic systems of wheel loader |
| CN108358078A (en) * | 2018-01-19 | 2018-08-03 | 中联重科股份有限公司 | Arm support system, arm support amplitude variation control system and control method thereof |
| CN111495909A (en) * | 2020-03-20 | 2020-08-07 | 中国人民解放军陆军防化学院 | Metal cylinder decontamination device |
| CN111495909B (en) * | 2020-03-20 | 2021-09-14 | 中国人民解放军陆军防化学院 | Metal cylinder decontamination device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104326384B (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204281132U (en) | A kind of anti-mistake faced upward the multiple spot inhibiting device and crawler crane of putting adjustable angle | |
| WO2015113400A1 (en) | Apparatus for steel wire rope swing detection, and hoisting machinery | |
| CN104326384A (en) | Over-pitching-up-proof multi-point limiting device with adjustable over-fall angle and crawler crane | |
| CN108358078A (en) | Arm support system, arm support amplitude variation control system and control method thereof | |
| JP2011063352A (en) | High lift work bucket with other object approach monitoring function | |
| CN203667837U (en) | Lifting angle limiter | |
| US7284743B1 (en) | Hoist limiting system | |
| CN203582341U (en) | Lifted rotary-type self-balancing tower crane | |
| CN207418149U (en) | A kind of Machine guarding for crane collision resistant | |
| CN203513019U (en) | Rotating stall protecting device | |
| CN201770276U (en) | Deviation-resistant device of bucket elevator | |
| CN204138227U (en) | A kind of integrated chemoprevention is crossed to face upward and is put principal arm angular stop means and crawler crane | |
| CN205524445U (en) | Turn to protection device and type of lifting hoisting equipment | |
| CN211489544U (en) | Tilting gear stop device and tilting gear | |
| CN204251111U (en) | Home elevator mechanical stopping device | |
| CN205046145U (en) | Spacing handle that hits with adjustable | |
| CN104261282A (en) | Integrated limiting device for preventing from over-rising and over-falling of angle of main arm and crawler crane | |
| CN205709589U (en) | Movable crane | |
| CN204096959U (en) | A kind of ward off rope device and hoisting crane | |
| CN203475846U (en) | Concrete pump truck and boom assembly thereof | |
| CN203699775U (en) | Hoister protector and construction machine | |
| CN203289662U (en) | Extended clamping device for electrode | |
| KR200374402Y1 (en) | structure of heat-sink in a crane | |
| CN216714032U (en) | Torque calculation and over-torque prevention system of double-rocker electric holding pole | |
| CN204138228U (en) | A kind of rotation protection device of cantilever crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |