CN103832314A - Road wrecker with U-type hanging arm - Google Patents
Road wrecker with U-type hanging arm Download PDFInfo
- Publication number
- CN103832314A CN103832314A CN201210484731.9A CN201210484731A CN103832314A CN 103832314 A CN103832314 A CN 103832314A CN 201210484731 A CN201210484731 A CN 201210484731A CN 103832314 A CN103832314 A CN 103832314A
- Authority
- CN
- China
- Prior art keywords
- arm
- telescopic boom
- bent plate
- plate
- shaped arm
- 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
Images
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
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to a road wrecker with a U-type hanging arm. The hanging arm of the road wrecker comprises a basic arm, a middle telescopic arm and a tail-segment telescopic arm, wherein the basic arm, the middle telescopic arm and the tail-segment telescopic arm are mutually matched in a sliding mode, at least part of the cross sections of the arm bodies of the basic arm, the middle telescopic arm and the tail-segment telescopic arm form the U-type arm, the U-type arm comprises an upper bent plate and a lower bent plate which are welded to each other, the upper bent plate is a large-arc groove-shaped plate, the lower bent plate is a U-type groove-shaped plate, and welded joints between the upper bent plate and the lower bent plate are located in the low-stress areas on the two sides of the U-type arm. The U-type arm is adopted for the road wrecker for the first time, the bottleneck that when wreckers in the wrecker industry develop to be heavier, weight reduction and operation parameter improvement are difficult to take into consideration at the same time is broken through, modularized design is achieved through the U-type hanging arm, the assembling ability and the maintainability can be taken into consideration at the same time, and the quality of the product can be controlled easily. While design, production and assembling efficiency are improved, daily maintenance is facilitated better, and the service life of the product is prolonged.
Description
Technical field
The present invention relates to a kind of road obstacle clearing vehicle, particularly relate to a kind of road obstacle clearing vehicle with U-shaped arm.
Background technology
Wrecker is on express highway and state, province's road, to be used for the specialized equipment of eliminating accident, fault vehicle.Along with the development of transportation, road transport is gradually to high speed, intensive, customizations and containerzation development.In addition, also there is larger variation in the vehicle structure of China, for example: multi axle car and heavy goods vehicles ratio progressively rise, add other factors, therefore the malignant change interpreter of China increases gradually, the task difficulty that road obstacle clearing vehicle faces is also increasing, so, the demand that the wrecker that current rescue fleet has can not adapt to remove obstacles now.As ensureing the wrecker of the coast is clear, undoubtedly also must heavy-duty, could meet the needs of removing obstacles of heavy-duty vehicle.Like this to wrecker lift, lift by crane and the performance of the key operation such as pulling is had higher requirement.
Making a general survey of domestic wrecker product, is from load-carrying vehicle chassis refit substantially.In addition, be subject to the constraint of national relevant laws and regulations, and the restriction of the aspect such as car chassis axle load and maximum total mass, existing wrecker product can not be without stopping most heavy-duty.Therefore, under the present situation of present stage famine chassis special, how both to improve and lifted, lift by crane and the key operation performance such as pulling, again can reasonable distribution axle load, the restriction of the maximum total mass that allows of not super chassis, can also meet the rescue operation to large-scale shipping accident vehicle on express highway, state, provincial highway, be a great problem that current domestic wrecker industry faces simultaneously.
Through development for many years, domestic wrecker enterprise has accumulated certain experience, has also taked certain measure to solve an industry difficult problem (not only alleviated complete vehicle curb weight but also improved and lift, lift by crane and the performance of the key operation such as pulling).With regard to arm, when road obstacle clearing vehicle operation, mainly use lifting and pull performance, require the necessary bending resistance and antitorque of arm.Wrecker boom structure generally adopts quadrangular section both at home and abroad, is welded by flange plate and web, and its manufacturing process is relatively simple, has good bending stiffness, is applicable to the material that intensity ratio is lower; Can not give full play to the load-carrying capacity of material for high strength material, transmitting torque and transverse force well, need establish additional support; And it is concentrated the most easily to produce stress at four corner points; Base plate, web are subject to larger action of compressive stress, often occur the situation of local buckling.
For fear of above-mentioned unfavorable factor, improve the stability of web, part prior art has adopted the arm of hexagon and other polygonal cross-section.The common ground in these cross sections is all to adopt great circle arc transition, and web height reduces, and force-bearing situation is improved.And these cross section actual computation width are less, be conducive to improve local anti-unstability ability.The each plate of telescopic boom does not produce local bending, and transmitting torque and transverse force preferably, and the telescopic boom of these polygonal cross-sections can be brought into play the mechanical property of materials preferably, alleviates dead load.At present these section forms are by general employing, domestic wrecker Rapid Development of Enterprise, and tonnage jumps and develops into 54t from 4t, 19t, 32t, 44t mono-.
But to super-tonnage development, but run into impassable bottleneck again, the contradiction of loss of weight and raising job parameter is difficult to take into account.
As everyone knows, if structural shape does not change, also will keep job parameter, want the just necessary mechanical characteristics that improves material of loss of weight.But high strength material is expensive, also higher to processing and welding process requirement, and the more high strength material being applicable to exist be also problem, the high-intensity material of pursuit is simply also not exclusively real.Therefore, wrecker industry wants to continue development, should loss of weight improve again bending resistance and the torsional property of arm---finally must be from the seeking breakthrough of structure own, research and development a new generation is applicable to wrecker lifting and pulls the arm of purposes, further promote bending resistance and the torsional property of arm, take into account loss of weight and improve job parameter, take into account assembling capacity and maintainability, realize modular design, production and assembling, distinguish product feature in the past simultaneously, progressively form the appearance characteristics of wrecker personalization of product.
Summary of the invention
The object of the invention is to propose a kind of can break through wrecker industry to loss of weight in heavy-duty road for development with improve job parameter and be difficult to take into account bottleneck, with the road obstacle clearing vehicle of U-shaped arm.
For achieving the above object, the invention provides a kind of road obstacle clearing vehicle with U-shaped arm, the arm of road obstacle clearing vehicle comprises the basic arm of mutual bearing fit, middle telescopic boom and minor details telescopic boom, the arm body cross-sectional plane of described basic arm, middle telescopic boom and minor details telescopic boom is U-shaped arm at least partly, described U-shaped arm comprises the upper bent plate and the lower bent plate that are welded to each other, described upper bent plate is great circle arc trough plate, described lower bent plate is U-shaped trough plate, and weld seam between upper bent plate and lower bent plate is positioned at the low stress area of U-shaped arm both sides.
Preferably, socket mutually bearing fit mutually between described basic arm, middle telescopic boom and minor details telescopic boom.
Preferably, between described basic arm and middle telescopic boom and middle telescopic boom and minor details telescopic boom, be equipped with at least two group slide plate slide block assemblies.
Preferably, described slide plate slide block assembly comprises the slide block assembly that is positioned at the slide plate assembly of described U-shaped arm upside, the left and right sides and matches with described slide plate assembly.
Preferably, described slide block assembly is provided with the adjusting double-screw bolt of adjusting gap between arm body.
Preferably, below described basic arm, be also provided with two derricking cylinder bearings.
Preferably, on the slide block assembly of basic arm and middle telescopic boom, lubricating cup is set.
Based on technique scheme, advantage of the present invention is:
The present invention has adopted first U-shaped arm configuration on wrecker, break through wrecker industry to loss of weight in heavy-duty road for development and the bottleneck that improves job parameter and be difficult to take into account, this U-shaped arm is realized modular design, takes into account assembling capacity and maintainability simultaneously, is conducive to control the quality of product.In improving design and production, efficiency of assembling, be more conducive to daily maintenance, extend product service life.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of road obstacle clearing vehicle of the present invention;
Fig. 2 is the structural representation of arm of the present invention;
Fig. 3 is the schematic perspective view of structure shown in Fig. 2;
Fig. 4 is the schematic cross-section of the U-shaped arm of the present invention;
Fig. 5 is the partial cross-sectional cut-away view of structure shown in Fig. 2.
Detailed description of the invention
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Referring to Fig. 1 ~ Fig. 5, the preferred embodiment of a kind of road obstacle clearing vehicle with U-shaped arm of the present invention shown in it, the arm 100 of road obstacle clearing vehicle of the present invention comprises the basic arm of mutual bearing fit, middle telescopic boom and minor details telescopic boom, preferably, socket mutually bearing fit mutually between described basic arm, middle telescopic boom and minor details telescopic boom.The arm body cross-sectional plane of described basic arm, middle telescopic boom and minor details telescopic boom is U-shaped arm at least partly, as shown in Figure 4; Described U-shaped arm comprises the upper bent plate 19 and the lower bent plate 20 that are welded to each other, and described upper bent plate 19 is great circle arc trough plate, and described lower bent plate 20 is U-shaped trough plate, and weld seam between upper bent plate 19 and lower bent plate 20 is positioned at the low stress area of U-shaped arm both sides.
Further, between described basic arm and middle telescopic boom and middle telescopic boom and minor details telescopic boom, be equipped with at least two group slide plate slide block assemblies, preferably, described slide plate slide block assembly comprises the slide block assembly that is positioned at the slide plate assembly of described U-shaped arm upside, the left and right sides and matches with described slide plate assembly.More preferably, described slide block assembly is provided with the adjusting double-screw bolt of adjusting gap between arm body.
Particularly, principle of work of the present invention and working process are:
The upper bent plate 19 of U-shaped arm and lower bent plate 20 can be made up of the material of different thicknesss of slab.Upper bent plate 19 is great circle arc trough plate, and when work, its tension stress is larger, and this has just improved the margin of stability of web; Lower bent plate 20 is U-shaped trough plate, and this structure can advantageously improve the ability of anti-local buckling.During fabrication, upper bent plate 19 is welded in above lower bent plate 20, weld seam between upper bent plate 19 and lower bent plate 20 is positioned at the low stress area of U-shaped arm body both sides, this low stress area can position measurement by stress detection device, and this kind of structure of the present invention greatly reduces the impact of welding stress on framing member intensity.
Through great many of experiments and mensuration, " U " type cross section that in the present invention, the cross section of the interface of bent plate 19 and lower bent plate 20 forms, that a kind of stressed comparatively desirable arm section form---its horizontal bending stiffness and torsion stiffness are better than other section form, favourable raising wrecker arm lifting and pull the reliability of operation.And, in the situation that lifting performance is identical, compared with the arm in U-shaped arm and hexagonal cross section, can reduce materials'use rate 10% left and right, particularly for multi-joint telescoping, the arm of significantly working, its weight loss effect is more remarkable.
Further, referring to Fig. 2, Fig. 3 and Fig. 5, on wrecker of the present invention, " U " type arm of lifting and pulling purposes is by basic arm, and middle telescopic boom and minor details telescopic boom form, and this kind of structure can realize the flexible of a joint, two joints or more piece arm.
Referring to Fig. 2 and Fig. 3, the agent structure of basic arm of the present invention comprises the first U-shaped arm body 13, the first arm head 1, the first arm tail assemblies 7, two derricking cylinder bearing 6, the first arm head double shackle 14, the first slide block assemblies 18, steel rope bracket 12; The agent structure of middle telescopic boom comprises that the second U-shaped arm body 10, the second arm heads 2, the second arm tail assembly 8, the second slide block assembly 16, the second slide plate assemblies 3 form; The agent structure of minor details telescopic boom comprises the 3rd U-shaped arm body 11, the three arm head assembly 4, the three slide block assemblies 17, double hoisting pulley assembly 9, the three arm head double shackle 15, the three slide plate assemblies 5.
The agent structure of basic arm, middle telescopic boom and minor details telescopic boom is made up of modular components welding, and wherein the first arm head double shackle 14 and the 3rd arm head double shackle 15, the second slide block assembly 16, the 3rd slide block assembly 17 and the first slide block assembly 18 and double hoisting pulley assembly 9, steel rope bracket 12 adopt the assembling mode of intermodule to be installed on corresponding arm body structure.Whole boom structure is resolved into multiple modular assemblies by the present invention, is more conducive to control the quality of product, improves design and produce the efficiency of assembling.
In addition, in the time of hoisting arm expansion, the first slide block assembly 18 of basic arm and middle telescopic boom arm head and the second slide block assembly 16 slide respectively successively on the second slide plate assembly 3 and the 3rd slide plate assembly 5, and the rest may be inferred.Like this, two groups of above-mentioned slide plate slide block assemblies of the present invention have alleviated basic arm and middle telescopic boom arm head, the wearing and tearing of left and right sides rectangle plane slide block assembly to arm body on the one hand, on the other hand by processing slide plate assembly, be conducive to ensure the gap between arm body, the assembling capacity of semi-girder arm body is strengthened greatly.Meanwhile, the present invention is also provided with lubricating cup on basic arm and middle telescopic boom arm head slide block assembly, is conducive to the daily lubricated maintenance of arm body.
In order further to strengthen bending resistance and the torsional property of arm, the present invention is except adopting the boom structure in U-shaped cross section, also adopt following structure: aspect slide block layout, at middle telescopic boom and minor details telescopic boom arm tail place, the slide block assembly of great circle arc contact surface is set; In middle telescopic boom and minor details telescopic boom arm body both sides, near arm tail position, the slide block assembly of rectangle plane is set; At basic arm and middle telescopic boom arm head upside, adjustable slide block assembly is set, and by regulating double-screw bolt to adjust the gap between arm body; At downside, arrange and be the large-area slide block assembly of semicircular arc, making has less stress and good distribution of stress in Bei Ti lap-joint; Rectangle plane slide block assembly is set in the left and right sides and installs lubricating cup additional.
Basic arm structure aspects arranges two derricking cylinder bearings 6 below basic arm.When arm pulls when operating mode or carries out single hook while lifting by crane when arm in side direction, arm body, under unbalance loading state, very easily causes distortion.The present invention improves torsional property by U-shaped cross section on the one hand, the present invention arranges to adjust arm body space by reasonable slide block on the other hand, and further limit the arm trend that is distorted, last the present invention is by adopting the supporting way of two derricking cylinder bearings, realize arm in lifting and pull the antitorque and bending resistance under operating mode, making arm in lifting and pull the reliability of working under operating mode to be ensured and continue to improve.
The present invention adopts first U-shaped arm configuration pattern on wrecker, has broken through wrecker industry to loss of weight in heavy-duty road for development and the bottleneck that improves job parameter and be difficult to take into account, for the development of wrecker industry boom structure pattern from now on provides a kind of direction.
While layout and basic arm structure to slide block on the basis of the boom structure pattern in U-shaped cross section is optimized design, and the bending resistance of arm and torsional property are further promoted.
U-shaped arm of the present invention has been realized modular design, takes into account assembling capacity and maintainability simultaneously, is more conducive to control the quality of product, improve design and produce, the efficiency of assembling, be more conducive to daily maintenance, extend product service life.
As the arm of wrecker purposes, distinguish the stiff profile that quadrangle and hexagon arm are had edges and corners in the past, its overall appearance is more succinct smooth, has progressively formed the appearance characteristics of wrecker personalization of product.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request protection of the present invention.
Claims (7)
1. the road obstacle clearing vehicle with U-shaped arm, the arm of road obstacle clearing vehicle comprises the basic arm of mutual bearing fit, middle telescopic boom and minor details telescopic boom, it is characterized in that: the arm body cross-sectional plane of described basic arm, middle telescopic boom and minor details telescopic boom is U-shaped arm at least partly, described U-shaped arm comprises the upper bent plate (19) and the lower bent plate (20) that are welded to each other, described upper bent plate (19) is great circle arc trough plate, described lower bent plate (20) is U-shaped trough plate, and weld seam between upper bent plate (19) and lower bent plate (20) is positioned at the low stress area of U-shaped arm both sides.
2. the road obstacle clearing vehicle with U-shaped arm according to claim 1, is characterized in that: socket mutually bearing fit mutually between described basic arm, middle telescopic boom and minor details telescopic boom.
3. the road obstacle clearing vehicle with U-shaped arm according to claim 2, is characterized in that: between described basic arm and middle telescopic boom and middle telescopic boom and minor details telescopic boom, be equipped with at least two group slide plate slide block assemblies.
4. the road obstacle clearing vehicle with U-shaped arm according to claim 3, is characterized in that: described slide plate slide block assembly comprises the slide block assembly that is positioned at the slide plate assembly of described U-shaped arm upside, the left and right sides and matches with described slide plate assembly.
5. the road obstacle clearing vehicle with U-shaped arm according to claim 4, is characterized in that: described slide block assembly is provided with the adjusting double-screw bolt of adjusting gap between arm body.
6. the road obstacle clearing vehicle with U-shaped arm according to claim 1, is characterized in that: below described basic arm, be also provided with two derricking cylinder bearings (6).
7. the road obstacle clearing vehicle with U-shaped arm according to claim 4, is characterized in that: on the slide block assembly of basic arm and middle telescopic boom, lubricating cup is set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484731.9A CN103832314A (en) | 2012-11-26 | 2012-11-26 | Road wrecker with U-type hanging arm |
| PCT/CN2013/073621 WO2014079184A1 (en) | 2012-11-26 | 2013-04-02 | Road wrecker having u-shaped boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484731.9A CN103832314A (en) | 2012-11-26 | 2012-11-26 | Road wrecker with U-type hanging arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103832314A true CN103832314A (en) | 2014-06-04 |
Family
ID=50775460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210484731.9A Pending CN103832314A (en) | 2012-11-26 | 2012-11-26 | Road wrecker with U-type hanging arm |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103832314A (en) |
| WO (1) | WO2014079184A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310245A (en) * | 2014-10-21 | 2015-01-28 | 捷胜海洋装备股份有限公司 | Two-graded telescopic hanger |
| CN111498758A (en) * | 2020-04-09 | 2020-08-07 | 中联重科股份有限公司 | U-shaped boom assembly, U-shaped boom and aerial working equipment |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2587835Y (en) * | 2002-11-20 | 2003-11-26 | 徐州重型机械厂 | Inner interlocked automatic telescopic U-shape crane jib |
| DE202004019021U1 (en) * | 2004-12-08 | 2006-04-20 | Liebherr-Werk Ehingen Gmbh | Telescopic system for mobile crane, comprises two telescopic armatures made out of hollow profiles, and screws centrally driven by means of central motor |
| CN101481070A (en) * | 2008-01-09 | 2009-07-15 | 神钢起重机株式会社 | Telescopic boom |
| CN201284196Y (en) * | 2008-09-02 | 2009-08-05 | 湖南三一起重机械有限公司 | Telescopic arm guide means and crane telescopic arm |
| CN201325362Y (en) * | 2008-11-06 | 2009-10-14 | 沈阳北方交通工程公司 | S-shaped suspension arm mechanism for road wrecker |
| CN201598119U (en) * | 2009-11-30 | 2010-10-06 | 徐州重型机械有限公司 | Crane and control system thereof for double variable-amplitude oil cylinders |
| CN102285597A (en) * | 2011-07-28 | 2011-12-21 | 长沙中联重工科技发展股份有限公司 | Method and structure for inter-arm positioning of crane jib, crane jib and crane |
| CN202245840U (en) * | 2011-09-30 | 2012-05-30 | 中联重科股份有限公司 | Sliding block assembly for telescopic boom of crane |
| CN202265376U (en) * | 2011-09-05 | 2012-06-06 | 徐州重型机械有限公司 | Fire engine and telescopic arm thereof |
| CN202272660U (en) * | 2011-09-21 | 2012-06-13 | 常德大汉专用汽车有限公司 | Crane boom side clearance adjusting device |
| CN102491173A (en) * | 2011-12-12 | 2012-06-13 | 中联重科股份有限公司 | Crane and closed type winch negative power control system for crane |
| CN102502433A (en) * | 2011-10-08 | 2012-06-20 | 武汉船用机械有限责任公司 | Variable amplitude hydraulic system of dual-oil-cylinder variable amplitude crane |
| CN202986939U (en) * | 2012-11-26 | 2013-06-12 | 徐州徐工随车起重机有限公司 | Road wrecker with U-shaped suspension arm |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318079Y (en) * | 1997-11-17 | 1999-05-12 | 长治清华机械厂 | Small crane on vehicle |
| JP3950289B2 (en) * | 2000-09-04 | 2007-07-25 | 株式会社室戸鉄工所 | Working machine slide arm |
| CN201850089U (en) * | 2010-10-15 | 2011-06-01 | 北京京城重工机械有限责任公司 | Five-knuckle arm telescopic mechanism for crane |
| CN202465131U (en) * | 2011-11-30 | 2012-10-03 | 徐州天地重型机械制造有限公司 | Synchronous telescopic device |
-
2012
- 2012-11-26 CN CN201210484731.9A patent/CN103832314A/en active Pending
-
2013
- 2013-04-02 WO PCT/CN2013/073621 patent/WO2014079184A1/en active Application Filing
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2587835Y (en) * | 2002-11-20 | 2003-11-26 | 徐州重型机械厂 | Inner interlocked automatic telescopic U-shape crane jib |
| DE202004019021U1 (en) * | 2004-12-08 | 2006-04-20 | Liebherr-Werk Ehingen Gmbh | Telescopic system for mobile crane, comprises two telescopic armatures made out of hollow profiles, and screws centrally driven by means of central motor |
| CN101481070A (en) * | 2008-01-09 | 2009-07-15 | 神钢起重机株式会社 | Telescopic boom |
| CN201284196Y (en) * | 2008-09-02 | 2009-08-05 | 湖南三一起重机械有限公司 | Telescopic arm guide means and crane telescopic arm |
| CN201325362Y (en) * | 2008-11-06 | 2009-10-14 | 沈阳北方交通工程公司 | S-shaped suspension arm mechanism for road wrecker |
| CN201598119U (en) * | 2009-11-30 | 2010-10-06 | 徐州重型机械有限公司 | Crane and control system thereof for double variable-amplitude oil cylinders |
| CN102285597A (en) * | 2011-07-28 | 2011-12-21 | 长沙中联重工科技发展股份有限公司 | Method and structure for inter-arm positioning of crane jib, crane jib and crane |
| CN202265376U (en) * | 2011-09-05 | 2012-06-06 | 徐州重型机械有限公司 | Fire engine and telescopic arm thereof |
| CN202272660U (en) * | 2011-09-21 | 2012-06-13 | 常德大汉专用汽车有限公司 | Crane boom side clearance adjusting device |
| CN202245840U (en) * | 2011-09-30 | 2012-05-30 | 中联重科股份有限公司 | Sliding block assembly for telescopic boom of crane |
| CN102502433A (en) * | 2011-10-08 | 2012-06-20 | 武汉船用机械有限责任公司 | Variable amplitude hydraulic system of dual-oil-cylinder variable amplitude crane |
| CN102491173A (en) * | 2011-12-12 | 2012-06-13 | 中联重科股份有限公司 | Crane and closed type winch negative power control system for crane |
| CN202986939U (en) * | 2012-11-26 | 2013-06-12 | 徐州徐工随车起重机有限公司 | Road wrecker with U-shaped suspension arm |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310245A (en) * | 2014-10-21 | 2015-01-28 | 捷胜海洋装备股份有限公司 | Two-graded telescopic hanger |
| CN111498758A (en) * | 2020-04-09 | 2020-08-07 | 中联重科股份有限公司 | U-shaped boom assembly, U-shaped boom and aerial working equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014079184A1 (en) | 2014-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102020211B (en) | Balancing device and crane with same | |
| CN102587277A (en) | Mobile equipment special for construction and maintenance of bridge barriers | |
| CN103625499B (en) | A kind of framework of narrow-gauge train bogie | |
| CN102556901A (en) | Forklift mast | |
| CN202879514U (en) | Bullet train steering support framework of railway vehicle | |
| CN201284462Y (en) | Bridging machine for both highway and railway | |
| CN201077720Y (en) | Tyre type doors hanging | |
| CN103832314A (en) | Road wrecker with U-type hanging arm | |
| CN202986939U (en) | Road wrecker with U-shaped suspension arm | |
| CN108100860A (en) | A kind of suspension hook of safety and stability and the bridge crane using the suspension hook | |
| CN103112499A (en) | Multi-box type inverted trapezoidal crane frame and crane provided with same | |
| CN206051351U (en) | Hang a kind of purlin for assembling and disassembling construction for bridge-collision-avoidance wall form | |
| CN208747474U (en) | A kind of shock mount device of crane | |
| CN203904834U (en) | Bridge detection vehicle for multiple working conditions | |
| CN110758563A (en) | Chassis of omnidirectional multifunctional intelligent emergency rescue vehicle | |
| CN202465199U (en) | Reach truck mast | |
| CN205574959U (en) | Ball valve telescopic joint floor truck | |
| CN201896053U (en) | Forklift | |
| CN202785365U (en) | Bridge-type cross-rail crane | |
| CN2641001Y (en) | Bogie of bridge crane | |
| CN204490302U (en) | The lift of the overall lifting of guideway vehicle | |
| CN203078602U (en) | Multi-box type inverted-trapezoidal crane frame and crane provided with same | |
| CN208747476U (en) | A kind of crane transverse beam and support leg device of high intensity | |
| CN202935224U (en) | Road wrecker with sliding platform mechanism | |
| CN202558449U (en) | Lifting appliance for vertical lifting of rolling mill memorial archway |
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: 20140604 |