CN203428812U - Truss type extending and retracting arm and crane comprising same - Google Patents
Truss type extending and retracting arm and crane comprising same Download PDFInfo
- Publication number
- CN203428812U CN203428812U CN201320366676.3U CN201320366676U CN203428812U CN 203428812 U CN203428812 U CN 203428812U CN 201320366676 U CN201320366676 U CN 201320366676U CN 203428812 U CN203428812 U CN 203428812U
- Authority
- CN
- China
- Prior art keywords
- arm
- truss
- joint
- type telescopic
- boom
- 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 discloses a truss type extending and retracting arm and a crane comprising the same. The truss type extending and retracting arm is arranged at the top of a tower body or a main arm of the crane in a hinging mode and comprises at least two sections of arm sections which are sheathed together in sequence and realize relative extending and retracting movement by utilizing self weight; each arm section comprises a chord member and a web member; a locking device for locking and unlocking two adjacent arm sections is arranged between two adjacent arm sections. The truss type extending and retracting arm and the crane disclosed by the utility model have the advantages that since the principle of extending and retracting by means of self weight is adopted, the locking and the unlocking between the arm sections are realized by means of the locking device with a simple structure, so that the extension and retraction can be realized without need of a power driving device and the like; sliding blocks and sliding channels, which are matched, between the arm sections are also beneficial to omitting of the power driving device; in addition, the structure is combined with a truss type structure, so that the mechanical property is improved, the self weight is further reduced, the structure is simplified and the processing cost is reduced.
Description
Technical field
The utility model relates to a kind of crane arm support, and a kind of truss-type cantilever crane specifically further says that a kind of self gravitation that utilizes realizes flexible truss-type telescopic arm; The utility model also relates to a kind of construction machinery and equipment that comprises above-mentioned truss-type telescopic arm.
Background technology
Because truss structure is from heavy and light, the feature such as wind area is little, load-carrying capacity is large, therefore the jib of truss structure is widely used on construction machinery and equipment.For industries such as wind-powered electricity generation, metallurgy, chemical industry, due to features such as operation side are little, lifting load is large, telescopic arm support advantage is comparatively outstanding, and performance the most significantly surely belongs to the box type telescopic booms such as wheel crane.But because its telescoping mechanism is comparatively complicated, from great, bearing capacity is relatively limited, has certain limitation.Also there is the disclosed truss-type telescopic arm of patent, but make a general survey of its structure, all there is bar none dynamical type telescoping mechanism (thering is Power Drive Units such as motor, winch, hydraulic actuating cylinder, steel rope), just by traditional box truss-like that changes into, dynamical type telescoping mechanism still adopts oil cylinder+steel rope, or winch+steel rope mode, huge structure is complicated.
The information that is disclosed in the utility model background parts is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Utility model content
Technical problem to be solved in the utility model is: the truss-type telescopic arm of prior art causes huge structure complexity, the poor shortcoming of load-carrying capacity because having dynamical type telescoping mechanism.
For solving the problems of the technologies described above, it is flexible that truss-type telescopic arm of the present utility model utilizes the deadweight of arm joint to realize jib, and blocking device (for example, pin inserting-drawing mechanism) locks or unlocking arm joint by arranging at alternate arm internode, thereby abandoned dynamical type telescoping mechanism completely.Slide block and slideway that the utility model also can cooperatively interact in the setting of adjacent two arm internodes, also can smooth and easyly slide accurately guaranteeing in the situation that there is no dynamical type telescoping mechanism.
Specifically, the utility model provides a kind of truss-type telescopic arm, it is characterized in that: it is installed on the top of the telescopic tower body of hoisting crane or the principal arm of amplitude-variable by articulated manner, comprise that at least two save inner-outer sleeve successively and are fitted together and can utilize deadweight to realize the arm joint of relative fore and aft motion, each arm joint comprises chord member and web member, every adjacent two arm internodes are provided with the blocking device for adjacent two arms joint of the locking and unlocking, described blocking device comprises pin inserting-drawing mechanism, and described pin inserting-drawing mechanism comprises:
Two boom pins, described two boom pins are coaxially set;
Two groups of boom pin patchholes, aim at described two boom pins respectively, and are arranged in external arm joint in two relative web member planes, and are arranged on the corresponding position in two relative web member planes corresponding in adjacent internal arms joint; And
Plug oil cylinder, the cylinder body of described plug oil cylinder is connected with described two boom pins respectively with piston rod, thereby control described two boom pins, at described two groups of boom pins, inserts in the hole and synchronously inserts and extract.
In above-mentioned truss-type telescopic arm, preferably, two relative web member planes and luffing plane parallel separately during described external arm joint and adjacent internal arms save.
In above-mentioned truss-type telescopic arm, preferably, during described external arm joint and adjacent internal arms save, two relative web member planes separately be take luffing plane and are arranged as the plane of symmetry.
In above-mentioned truss-type telescopic arm, preferably, described pin inserting-drawing mechanism also comprises two Compress Springs, and the in the situation that of plug oil cylinder hold-off pressure, described two Compress Springs promote described boom pin and carry out described insert action; And under the pressure-driven of described plug oil cylinder, described two boom pins are carried out described pull action.
Or the insert action that described boom pin inserts in the hole at boom pin and pull action are all driven by the pressure of described plug oil cylinder.
Preferably, described pin inserting-drawing mechanism also comprises that being arranged on adjacent two arm internodes saves the limiting stopper of the end position of fore and aft motion to limit adjacent two arms.
In above-mentioned truss-type telescopic arm, preferably, at every adjacent two arm internodes, be provided with slide block and the slideway cooperatively interacting.Further preferably, described slide block and described slideway are separately positioned on the inner side of external arm joint and the outside of internal arms joint; Or described slideway and described slide block are separately positioned on the inner side of external arm joint and the outside of internal arms joint.
In above-mentioned truss-type telescopic arm, preferably, the chord member of dissimilar arm joint has different cross-sectional planes, and described cross-sectional plane comprises pipe cross-sectional plane, square tube cross-sectional plane and rectangular tube cross-sectional plane.
The utility model also provides a kind of hoisting crane, and it comprises above-mentioned truss-type telescopic arm.
By technique scheme, the utility model can be achieved as follows beneficial effect:
Owing to adopt relying on the flexible principle of deadweight, between arm joint, rely on blocking device simple in structure to realize the locking and unlocking, the utility model can be realized flexible without Power Drive Unit etc.And the slide block cooperatively interacting and slideway between arm joint also contribute to thoroughly to break away from Power Drive Unit.
In addition, said structure combines with truss structure, has improved mechanical property, has further reduced deadweight, simplifies the structure, and has reduced tooling cost.
In addition, by adopting the blocking device of web member plane layout pin inserting-drawing mechanism, with respect to traditional, on four chord members, a plurality of pin inserting-drawing mechanisms are set, it is stressed clear, and plug efficiency is high.In addition, chord member adopts the shaped steel such as pipe or square tube or rectangular tube, and purchase cost is low, practical.
Accompanying drawing explanation
Fig. 1 is the cross-sectional direction view (only showing chord member and web member) of a kind of truss-type telescopic arm described in the utility model;
Fig. 2 is the cross-sectional direction view (only showing chord member and web member) of another kind of truss-type telescopic arm described in the utility model;
Fig. 3 is the cross-sectional direction view (only showing chord member and web member) of another kind of truss-type telescopic arm described in the utility model;
Fig. 4 is the cross-sectional direction view (only showing chord member and web member) of another kind of truss-type telescopic arm described in the utility model;
The view of Fig. 5 has shown the cross-sectional direction view with the truss-type telescopic arm of pin inserting-drawing mechanism of the present utility model;
Fig. 6 is the full reduced time constitution diagram of truss-type telescopic arm described in the utility model on hoisting crane;
Fig. 7 is the full expand constitution diagram of truss-type telescopic arm described in the utility model on hoisting crane;
Fig. 8 is the crane operating status figure that contains truss-type telescopic arm described in the utility model;
Fig. 9 is the view of another instantiation of pin inserting-drawing mechanism described in the utility model;
Figure 10 is the view of another instantiation of pin inserting-drawing mechanism described in the utility model, does not wherein contain spring structure.
Sequence number in figure: 10, first arm joint; 11, first arm joint chord member; 12, first arm joint web member; 10, the second arm joint; 21, the second arm joint chord member; 22, the second arm joint web member; 30, last arm joint; 31, last arm joint chord member; 32, last arm joint web member; 40, pin inserting-drawing mechanism; 41, boom pin; 42 compression springs; 43, connect bearing pin; 44, plug oil cylinder; 50, tower body; 60, areal of support; 70, luffing mechanism.
Should understand, the accompanying drawing in the application might not be drawn in proportion, and it shows in a way each feature of the groundwork of the present utility model through having simplified.Concrete design feature of the present utility model disclosed herein, comprises for example concrete size, orientation, location and profile, will partly by application and the environment for use of specific purpose, be determined.
In these accompanying drawings, in running through several figures of accompanying drawing, Reference numeral refers to identical or equivalent part of the present utility model.
The specific embodiment
Now will be concrete with reference to each embodiment of the present utility model, in the accompanying drawings with in following description the example of these embodiment has been shown.Although the utility model combines and is described with exemplary embodiment, should understand, this specification sheets is not intended to the utility model to be restricted to those exemplary embodiments.On the contrary, the utility model is intended to not only cover these exemplary embodiments, and covering can be included in various replacements, modification, equivalents and other embodiment within the spirit and scope of the present utility model that limited by claims.
As Fig. 1,2,3 and Fig. 4 as shown in, truss-type telescopic arm described in the utility model has some truss-like arm joints that are set in together successively to form, and wherein truss-like arm joint is mainly that circular pipe, cross section is that chord member and the web member that foursquare square tube, cross section are rectangular rectangular tube forms by cross section.
Obviously, pipe is the most common pipe fitting, adopts the chord member of pipe to contribute to the buying of material, and then reduces costs (referring to Fig. 1).The chord member that adopts square tube, can obtain larger bending strength, the stability (referring to Fig. 2) while contributing to jib carrying.The chord member of rectangular tube has different bending strengths in different directions, by the direction at the appropriate arrangement of dissimilar arm joint rectangular tube, can obtain larger bending strength with the chord member of relatively little cross-sectional plane, thereby obtain larger load-carrying capacity (referring to Fig. 3).
In addition, the chord member of dissimilar arm joint has different cross-sectional planes.For example the chord member of first arm joint and last arm joint adopts pipe, and the chord member of insert jib section adopts square tube (referring to Fig. 4).Certainly, between the chord member of dissimilar arm joint, also can adopt other array mode of these cross-sectional planes.Such combination has many advantages, for example, contributes to take into account and reduces costs and obtain larger load-carrying capacity, or contribute to get the raw materials ready when insufficient and guarantee to produce at the pipe fitting in certain cross section.
Between each arm joint of truss-type telescopic arm of the present utility model launch or retracted mode under can obtain location, this is that blocking device by being arranged between alternate arm joint is realized.Just because of the existence of blocking device (pin inserting-drawing mechanism), the power that makes the utility model not rely on traditional dynamical type telescoping mechanism (having Power Drive Units such as motor, winch, hydraulic actuating cylinder, steel rope) also can obtain the locking and unlocking between arm joint.
Blocking device of the present utility model can adopt various structures, as long as can realize the locking and unlocking between alternate arm joint.In the utility model, adopted the pin inserting-drawing mechanism 40 being arranged on web member as blocking device, as shown in Fig. 5, Fig. 9, Figure 10.
When described blocking device includes two springs as shown in Figure 9, when plug oil cylinder hold-off pressure, rely on spring force that boom pin is inserted in corresponding hole, while bouncing back under the effect of plug oil cylinder in hydraulic efficiency pressure system, boom pin is extracted to corresponding hole, Compress Spring, makes spring energy-storage simultaneously.
When described blocking device does not comprise spring as shown in figure 10, boom pin " inserting " and " pulling out " are realized by oil cylinder " stretching " and " contracting " respectively.
As shown in Figure 6,7, truss-type telescopic arm described in the utility model, the main upper end that is arranged on tower body or the principal arm of hoisting crane in hinged mode, jointly forms a kind of hoisting hook and carries equipment.Fig. 8 shows the situation of carrying out luffing by the whole cocked truss-type telescopic arm of luffing mechanism of hoisting crane.
Although be to take the truss-type telescopic arm of three joint arms joints to be described as example in the application's accompanying drawing, yet as known to the skilled person, truss-type telescopic arm obviously can be not limited to the situation of three joints.For describing better structure of the present utility model, below still to take the truss-type telescopic arm of three joint mutual sheathing be example, and described three joint truss-type telescopic arms are hinged on to retractable tower body upper end form a kind of hoisting crane.This embodiment is a kind of preferred enforcement of truss-type telescopic arm described in the utility model, the utility model is not construed as limiting.
As Fig. 1,2,3 and Fig. 4 as shown in, first arm joint chord member 11 forms first arm joint 10 with first arm joint web member 12 by rational deployment; The second arm joint 20 is also that the truss-like arm consisting of the second arm joint chord member 21 and the second arm joint web member 22 saves; In like manner, last arm joint 30 consists of last arm joint chord member 31 and last arm joint web member 32.Above-mentioned three arms joint mutual sheathing together.
At every two adjacent arm internodes (first arm joint and the second arm joint, the second arm joint and last arm joint), be provided with above-mentioned pin inserting-drawing mechanism, to realize the locking and unlocking between alternate arm joint, as shown in Fig. 5, Fig. 9, Figure 10.
Wherein said pin inserting-drawing mechanism 40 comprises boom pin 41, be arranged on boom pin patchhole and the plug oil cylinder of the corresponding position in the web member plane of adjacent external arm joint and internal arms joint, and described plug oil cylinder can drive the insertion that boom pin inserts in the hole at boom pin and pull out the locking and unlocking of realizing between alternate arm joint.In other words, by boom pin 41 being inserted to boom pin patchhole and adjacent arm joint being locked; By boom pin 41 is extracted to the release that can realize between alternate arm joint from boom pin patchhole.
Two pin inserting-drawing mechanisms shown in Fig. 5 be arranged on parallel plane two the web member planes of luffing on, such being provided with helps to guarantee the stability of locking between arm joint.Certain this structure is only as example, does not get rid of two pin inserting-drawing mechanisms are arranged on to the possibility in two web member planes vertical with luffing plane.
So-called luffing plane, refers to the plane of sweeping the track place that fine jade crosses when the hinge-point of jib line of centers in the upper end around tower body or principal arm rotates.So-called web member plane, refers to the plane that the axis of the web member of arranging between two chord members forms, in other words: between arrange two chord members that are arranged in parallel of web member the determined plane of axis.
Described pin inserting-drawing mechanism shown in Fig. 5 or take luffing plane as plane of symmetry left and right coaxial line symmetrically arranged, this symmetrical structure has guaranteed the stressed even of web member places, both sides, be convenient to the synchronism operation of insert-pull pin, further guaranteed the stability of the locking and unlocking between lock arm joint.Certain this structure is only as example, and the pin inserting-drawing mechanism of asymmetric setting is also possible.
As shown in Figure 9, this pin inserting-drawing mechanism is arranged in order to the locking and unlocking external arm joint web member 12 and adjacent inner arm joint web member 22.This pin inserting-drawing mechanism comprises that two boom pins 41, two connect bearing pin 43, plug oil cylinder 44, and is arranged on two groups of boom pin patchholes in the web member plane of relative direction separately of adjacent external arm joint (arm joint web member 12 headed by shown in figure) and internal arms joint (being that the second arm saves web member 22 shown in figure).In two web member planes that it is the plane of symmetry that described two groups of boom pin patchholes are arranged on luffing plane parallel, the luffing plane of take, and left and right coaxial line is symmetrical arranged, the synchronously insertion that wherein front end of two boom pins 41 can the boom pin in described two web member planes inserts in the hole and synchronously extracting.The two ends (being the end of cylinder block and the end of oil cylinder piston) of plug oil cylinder are being connected respectively the rear end of corresponding boom pin 41 by corresponding connection bearing pin 43.
In above-mentioned example, adopting and connecing bearing pin 43 is only to give an example as a kind of, and any structure that can realize this connection is all feasible, and for example screw connects.
As selection, described plug oil cylinder 44 can be single acting oil cylinder, can be also two-way cylinder.
So-called single acting oil cylinder, refers to that hydraulic pressure can only drive its piston to move in one direction, and moves up and want outer power to drive another side.Shown in Fig. 9, be in embodiment, hydraulic pressure can only driven plunger make whole plug oil cylinder at the square upward movement shortening, and the elongation of whole oil cylinder drives by Compress Spring.In the case, this pin inserting-drawing mechanism also comprises two Compress Springs 42.
So-called two-way cylinder, refers to the shortening of whole oil cylinder or extends all by hydraulic pressure, to be driven, without the driving of external force, therefore now just without Compress Spring 42.Certainly, the movement being also not precluded within a direction is also subject to the effect of external force (such as spring force) simultaneously.
When " retraction " of hydraulic driving oil cylinder, two boom pins 41 are inserted in the hole " extracting " by the boom pin from external arm joint web member 12 and adjacent inner arm joint web member 22 simultaneously, thereby allow flexible between external arm joint and internal arms joint.
When external arm joint with internal arms joint is flexible while putting in place, the boom pin patchhole that external arm joint web member 12 and adjacent inner arm save on web member 22 aligns mutually.For above-mentioned single acting oil cylinder, now hydraulic pressure be released and oil cylinder in free state, the elastic force of Compress Spring 42 forces boom pin 41 to be inserted in described boom pin patchhole.And for above-mentioned two-way cylinder, by hydraulic pressure driven plunger in the reverse direction, make oil cylinder overall elongated, thereby boom pin 41 is inserted in described boom pin patchhole simultaneously.
By the pin inserting-drawing mechanism of structure shown in above-mentioned Fig. 9, make only to use an oil cylinder can realize insert-pull pin action, and guaranteed the synchronism of insert-pull pin action.Reduced the quantity of oil cylinder, simplified control system, thus save cost.
In order to guarantee that pin inserting-drawing mechanism 40 can accurately plug, pin inserting-drawing mechanism 40 can also be included in the limiting stopper that adjacent two arm internodes arrange, and to limit the end position of adjacent two arms joint fore and aft motion, limits thus the accurate location that inserts pin.
For the smoothness that guarantees that arm internode slides mutually, can slide block and slideway (not shown) be set in every two adjacent suitable positions of arm internode, set-up mode is: be arranged on symmetrically the end inner side of external arm joint, the head end outside of internal arms joint.Two kinds of different structures have been produced thus: slide block and slideway are separately positioned on the end inner side of external arm joint and the head end outside of internal arms joint; Or slideway and slide block are separately positioned on the end inner side of external arm joint and the head end outside of internal arms joint.This slide block also plays directional tagging when reducing the friction force mutually sliding.
Below in conjunction with said structure and the working process of truss-type telescopic arm of the present utility model is described with reference to accompanying drawing.
In Fig. 6-8, illustrated truss-type telescopic arm in hinged mode, be arranged on hoisting crane tower body 50 upper end and form hoisting hook and carry equipment.
Fig. 6 is the full reduced time constitution diagram of truss-type telescopic arm described in the utility model on hoisting crane, and it has shown the full reduced state that is initially of truss-type telescopic arm, and wherein last arm joint 30 lands.Along with the elongation of tower body 50, its first section of arm joint 10 is moving upward, and all the other each arms joints utilize himself gravity relative bearing surface 60(ground or support etc.) keep static, make arm internode produce motion mutually.When first arm joint 10 is thus lifted to certain position, the limiting stopper between first arm joint the 10 and second arm joint 20 retrains the relative sliding between it, and pin inserting-drawing mechanism connects these two arm joints locked, becomes one, and then drives the second arm joint to continue upward movement.The like, until all arms joint total deadlock is as a whole, form a truss-type cantilever crane.Now " elongation " of jib moved (referring to Fig. 7).By the luffing mechanism 70 of hoisting crane, whole cocked jib also hangs year (Fig. 8).
When truss-type telescopic arm of the present utility model along with the retraction of tower body 50 is moved down into last arm joint 30 contact bearing surface 60(ground or supports) time (referring to Fig. 7), wherein the pin inserting-drawing mechanism 40 between any one group of alternate arm joint is disengaged.Now, when tower body 50 continues retraction, due to last arm joint 30, under the effect of bearing surface 60, bearing surface is static relatively, so be disengaged two arm internodes of pin inserting-drawing mechanism, produces relative sliding, i.e. retraction movement.When two jibs of relative sliding retract to after end position (being determined by limiting stopper), remove second pin inserting-drawing mechanism.The like, until saving, all arms nest together, fixing locked, realize " retraction " action (Fig. 6) of truss-type telescopic arm.
The aforementioned description to concrete exemplary of the present utility model is in order to illustrate and purpose of illustration.Limit the utility model is not thought in these descriptions, or the utility model is defined as to disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present utility model and practical application thereof, thereby made others skilled in the art can realize and utilize various exemplary of the present utility model and various selection and change.Scope of the present utility model is intended to be limited by appending claims and equivalents thereof.
Claims (10)
1. a truss-type telescopic arm, it is characterized in that: it is installed on the top of the telescopic tower body of hoisting crane or the principal arm of amplitude-variable by articulated manner, comprise that at least two save inner-outer sleeve successively and are fitted together and can utilize deadweight to realize the arm joint of relative fore and aft motion, each arm joint comprises chord member and web member, every adjacent two arm internodes are provided with the blocking device for adjacent two arms joint of the locking and unlocking, described blocking device comprises pin inserting-drawing mechanism, and described pin inserting-drawing mechanism comprises:
Two boom pins, described two boom pins are coaxially set;
Two groups of boom pin patchholes, aim at described two boom pins respectively, and are arranged in external arm joint in two relative web member planes, and are arranged on the corresponding position in two relative web member planes corresponding in adjacent internal arms joint; And
Plug oil cylinder, the cylinder body of described plug oil cylinder is connected with described two boom pins respectively with piston rod, thereby control described two boom pins, at described two groups of boom pins, inserts in the hole and synchronously inserts and extract.
2. truss-type telescopic arm according to claim 1, is characterized in that: two relative web member planes and luffing plane parallel separately during described external arm joint and adjacent internal arms save.
3. truss-type telescopic arm according to claim 2, is characterized in that: during described external arm joint and adjacent internal arms save, two relative web member planes separately be take luffing plane and arranged as the plane of symmetry.
4. truss-type telescopic arm according to claim 1, is characterized in that: described pin inserting-drawing mechanism also comprises two Compress Springs, and the in the situation that of plug oil cylinder hold-off pressure, described two Compress Springs promote described boom pin and carry out described insert action; And under the pressure-driven of described plug oil cylinder, described two boom pins are carried out described pull action.
5. truss-type telescopic arm according to claim 1, is characterized in that: the insert action that described boom pin inserts in the hole at boom pin and pull action are all driven by the pressure of described plug oil cylinder.
6. truss-type telescopic arm according to claim 1, is characterized in that: described pin inserting-drawing mechanism also comprises that being arranged on adjacent two arm internodes saves the limiting stopper of the end position of fore and aft motion to limit adjacent two arms.
7. truss-type telescopic arm according to claim 1, is characterized in that: at every adjacent two arm internodes, be provided with slide block and the slideway cooperatively interacting.
8. truss-type telescopic arm according to claim 7, it is characterized in that: described slide block and described slideway are separately positioned on the inner side of external arm joint and the outside of internal arms joint, or described slideway and described slide block are separately positioned on the inner side of external arm joint and the outside of internal arms joint.
9. truss-type telescopic arm according to claim 1, is characterized in that: the chord member of dissimilar arm joint has different cross-sectional planes, and described cross-sectional plane comprises pipe cross-sectional plane, square tube cross-sectional plane and rectangular tube cross-sectional plane.
10. a hoisting crane, is characterized in that: this hoisting crane comprises the truss-type telescopic arm described in any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320366676.3U CN203428812U (en) | 2013-06-24 | 2013-06-24 | Truss type extending and retracting arm and crane comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320366676.3U CN203428812U (en) | 2013-06-24 | 2013-06-24 | Truss type extending and retracting arm and crane comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203428812U true CN203428812U (en) | 2014-02-12 |
Family
ID=50057863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320366676.3U Expired - Lifetime CN203428812U (en) | 2013-06-24 | 2013-06-24 | Truss type extending and retracting arm and crane comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203428812U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318783A (en) * | 2013-06-24 | 2013-09-25 | 郑州新大方重工科技有限公司 | Truss type telescopic boom and crane comprising truss type telescopic boom |
-
2013
- 2013-06-24 CN CN201320366676.3U patent/CN203428812U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318783A (en) * | 2013-06-24 | 2013-09-25 | 郑州新大方重工科技有限公司 | Truss type telescopic boom and crane comprising truss type telescopic boom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201214601Y (en) | Main arm telescopic mechanism for crane | |
| CN101585491B (en) | Automobile crane and device with multiple sections of telescopic jibs thereof | |
| CN106219421B (en) | A kind of multi-stage expansion mechanism and engineering machinery | |
| CN102285598B (en) | Multi-section arm telescopic device and crane with same | |
| CN103896155B (en) | Control the hydraulic control system of twin-tub sequential telescopic, suspension arm mechanism and hoisting crane | |
| WO2012159512A1 (en) | Latch-type telescopic boom and telescopic boom crane | |
| CN106185652A (en) | A kind of multi-stage expansion mechanism and engineering machinery | |
| CN202481966U (en) | Suspension arm of crane | |
| CN203428812U (en) | Truss type extending and retracting arm and crane comprising same | |
| CN209259541U (en) | A kind of five joint arm telescoping mechanism of single cylinder | |
| CN102583174A (en) | Crane boom | |
| CN103318783A (en) | Truss type telescopic boom and crane comprising truss type telescopic boom | |
| CN2878316Y (en) | Inserted pin mechanism for crane | |
| CN205346689U (en) | Four sections suspension arm device of single flexible hydro -cylinder and built -in wire rope linkage drive | |
| CN108840258B (en) | Combined telescopic arm system and engineering machinery | |
| WO2023159752A1 (en) | Single-cylinder multi-section boom telescopic mechanism, boom and crane | |
| CN204057774U (en) | Crane auxiliary arm and crane | |
| CN102674171A (en) | Lazy arm protruded four-link steel wire rope telescoping mechanism | |
| CN103434952B (en) | One has surpassed tensioner lockable mechanism and hoisting crane | |
| CN205346686U (en) | Flexible arm structure and hoist with go back to mechanism of contracting | |
| CN101214913B (en) | Connecting rod type interlocking mechanism for crane | |
| CN201825675U (en) | System for single cylinder and three stay ropes to drive arm bodies of lorry-mounted crane to retract synchronously | |
| CN204625034U (en) | Twin-tub rotation formula telescoping mechanism | |
| CN209277830U (en) | Lifting device and with its well workover equip | |
| EP3724123B1 (en) | Expandable heavy equipment, elongated pull element, and use of expandable heavy equipment |
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: 20140212 |