CN203048456U - Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system and crane - Google Patents
Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system and crane Download PDFInfo
- Publication number
- CN203048456U CN203048456U CN 201220745971 CN201220745971U CN203048456U CN 203048456 U CN203048456 U CN 203048456U CN 201220745971 CN201220745971 CN 201220745971 CN 201220745971 U CN201220745971 U CN 201220745971U CN 203048456 U CN203048456 U CN 203048456U
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- Prior art keywords
- locating part
- oil cylinder
- arm
- telescopic
- limiting structure
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- Expired - Lifetime
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- 238000009434 installation Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 4
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 4
- 241001330002 Bambuseae Species 0.000 abstract 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 4
- 239000011425 bamboo Substances 0.000 abstract 4
- 230000003116 impacting effect Effects 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 238000009432 framing Methods 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 3
- 230000000574 ganglionic effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a limit structure of flexible hydro-cylinder in flexible cantilever crane system, flexible cantilever crane system includes the multisection arm festival, and the end arm of this multisection arm festival includes the arm section of thick bamboo and is located the arm head of this arm section of thick bamboo tip, and flexible hydro-cylinder can be flexible at the inside axial of this multisection arm festival to can follow the arm section of thick bamboo and remove towards the arm head, wherein, limit structure is including setting up the first locating part on flexible serving to and the second locating part of backstop this first locating part, this second locating part with first locating part set up the tip at the arm section of thick bamboo correspondingly or in the arm head. The utility model also discloses an use the utility model provides a limit structure's flexible cantilever crane system to and an use this flexible cantilever crane system's hoist. Because the first limiting part is fixed on the telescopic end of the telescopic oil cylinder, the telescopic end of the telescopic oil cylinder can be prevented from impacting the arm head in the form of punching the arm head and the like through the second limiting part, the structural part of the arm frame is protected, and the telescopic oil cylinder is simple in structure and high in practicability.
Description
Technical field
The utility model relates to the spacing field of telescopic oil cylinder in the telescopic jib system, particularly, relates to the position limiting structure of telescopic oil cylinder in a kind of telescopic jib system, uses the jib telescopic system of this position limiting structure and uses the hoisting crane of this jib telescopic system.
Background technology
In the crane arm support technical field, usually use the telescopic jib system of single cylinder bolt-type, the common single oil cylinder joint of this telescopic jib system particularly, comprises fixed arm joint and a plurality of movable arm joint.Wherein, the fixed arm joint is fixed with pedestal, and a plurality of movable arm ganglionic layer layers are enclosed within the fixed arm joint, and protruding by telescoping mechanism control.Wherein, telescoping mechanism comprises telescopic oil cylinder and automatic pinning mechanism, and usually, the piston rod of telescopic oil cylinder (being fixed end) is fixed on the bottom of fixed arm joint, and cylinder barrel (i.e. flexible end) moves in the direction of stretching out of movable jib.Automatic pinning mechanism is fixed on the cylinder barrel, thereby automatic pinning mechanism stretches out telescoping mechanism is fixed on this arm joint when cylinder barrel moves to the latch position of the arm joint that will control.Then by telescopic oil cylinder this arm joint is driven and stretch out or withdraw.
As shown in Figure 1, the minor details arm of single oil cylinder joint generally includes arm tube 2 and is positioned at the arm head 21 of these arm tube 2 ends, the flexible end 11 of telescopic oil cylinder 1, and namely cylinder barrel can move towards arm head 21 along arm tube 2, in order to make the cylinder barrel conveniently moving, can roller 6 parts such as grade be installed at cylinder barrel.Under normal circumstances, the flexible end 11 of telescopic oil cylinder 1, namely the front end face of cylinder barrel can not surpass arm head 21.Yet, when artificial maloperation or the fault of electric detection system take place, will cause the stretching out of cylinder barrel mistake of telescopic oil cylinder, this cylinder barrel is not stopped goes out arm head, will cause the damage of the framing member of arm head.
The utility model content
A purpose of the present utility model provides the position limiting structure of telescopic oil cylinder in a kind of telescopic jib system, and this position limiting structure is simple in structure, can prevent the flexible end of telescopic oil cylinder, goes out arm head as cylinder barrel, avoids the framing member of arm head is caused damage.
Another purpose of the utility model provides a kind of telescopic jib system, the position limiting structure that this telescopic jib system uses the utility model to provide.
Another purpose of the present utility model provides a kind of hoisting crane, the telescopic jib system that this hoisting crane uses the utility model to provide.
To achieve these goals, the utility model provides the position limiting structure of telescopic oil cylinder in a kind of telescopic jib system, described telescopic jib system comprises the single oil cylinder joint, the arm head that the minor details arm of this single oil cylinder joint comprises the arm tube and is positioned at this arm tube end, described telescopic oil cylinder can save inner axial stretching at this single oil cylinder, moving towards described arm head along described arm tube, wherein, described position limiting structure comprises first locating part on the flexible end that is arranged on described telescopic oil cylinder, and second locating part of this first locating part of backstop, this second locating part and first locating part are arranged in the end or described arm head of described arm tube accordingly.
Preferably, described first locating part comprises the limiting stopper on the flexible end that removably is fixed on described telescopic oil cylinder.
Preferably, on the described flexible end mounting bracket is arranged fixedly, this mounting bracket comprises installation portion that described limiting stopper is installed and the described limiting stopper of backstop away from the stopper section of described second locating part motion, and described installation portion and described stopper section form the L type structure of holding described limiting stopper.
Preferably, described limiting stopper is elasticity High molecular material piece.
Preferably, described first locating part is arranged in the sidepiece of the flexible end of described telescopic oil cylinder, described second locating part comprises the limit base that is fixed on described arm head inside, this limit base comprises the spacing end face that is positioned near the end of described first locating part, and this spacing end face is provided with the central through hole that penetrates for described flexible end.
Preferably, described limit base comprises the side plate of arranging vertically and radially is fixed on the end plate of this side end, described spacing end face is provided by described end plate, and described limit base also comprises brace panel, and this brace panel tilts to be fixed between described end plate and the described side plate.
Preferably, described position limiting structure also comprises described first locating part is directed to guide on described second locating part.
Preferably, described first locating part is two and is arranged symmetrically in the both sides of the flexible end of described telescopic oil cylinder, described second locating part comprises the limit base that is fixed on described arm head inside, this limit base comprises the spacing end face that is positioned near the end of described first locating part, and this spacing end face is provided with the central through hole that penetrates for described flexible end, described guide is for being directed to described first locating part guide plate on the described spacing end face, this guide plate is two and corresponding with described first locating part, and all tilts to extend towards described second locating part from described arm tube.
According on the other hand of the present utility model, a kind of telescopic jib system is provided, this telescopic jib system comprises the position limiting structure of telescopic oil cylinder in the telescopic jib system that the utility model provides.
According on the other hand of the present utility model, a kind of hoisting crane is provided, described hoisting crane comprises the telescopic jib system that the utility model provides.
Pass through technique scheme, because (for example cylinder barrel) fixedly has first locating part on the flexible end of telescopic oil cylinder, and be provided with second locating part of this first locating part of backstop in arm head inside, the flexible end that therefore can prevent telescopic oil cylinder impacts arm head to go out forms such as arm head, thereby avoid the damage to the framing member of arm head, and it is simple in structure, practical.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and constitutes the part of specification sheets, is used from explanation the utility model with the following specific embodiment one, but does not constitute restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the front elevational schematic of the local structure of telescopic jib system in the prior art;
Fig. 2 is the front elevational schematic of the local structure of the telescopic jib system that provides of the utility model preferred implementation;
Fig. 3 is the schematic top plan view of the local structure of the telescopic jib system that provides of the utility model preferred implementation, the band semi-sictional view, and wherein first locating part does not contact with second locating part;
Fig. 4 is the schematic top plan view of the local structure of the telescopic jib system that provides of the utility model preferred implementation, the band semi-sictional view, and wherein first locating part contacts with second locating part.
Description of reference numerals
1 telescopic oil cylinder, 2 arm tubes
3 first locating parts, 4 second locating parts
5 guides, 6 rollers
11 flexible end 21 arm heads
31 limiting stoppers, 32 mounting brackets
33 installation portions, 34 stopper sections
41 spacing end face 42 central through holes
43 side plates, 44 end plates
45 brace panels
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.Should be understood that the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
In the utility model, do not doing under the situation of opposite explanation, the noun of locality that uses is interior and outer as the profile of " inside and outside " corresponding component, " axially " refers to the flexible direction of telescopic oil cylinder, " radially " then be perpendicular to axial direction, particularly, can be with reference to accompanying drawing 3 and page shown in Figure 4, wherein " axially " refer to the left and right directions in this page, " radially " refers to the above-below direction in this page.These nouns of locality only are used for explanation the utility model and are not limited to the utility model.
Identical with prior art is, the telescopic jib system of the hoisting crane that provides at the utility model adopts single cylinder insert-pull pin stretch mode, that is, the telescopic jib system comprises the single oil cylinder joint, and this single oil cylinder joint comprises that fixed arm joint and a plurality of movable arm save.Wherein the fixed arm joint is fixed with pedestal, and a plurality of movable arm ganglionic layer layers are enclosed within the fixed arm joint, and protruding by telescoping mechanism control.Wherein, telescoping mechanism comprises telescopic oil cylinder 1 and automatic pinning mechanism, and usually, the piston rod of telescopic oil cylinder 1 (being fixed end) is fixed on the bottom of fixed arm joint, and cylinder barrel (i.e. flexible end) moves in the direction of stretching out of movable jib.Automatic pinning mechanism is fixed on the cylinder barrel, and when cylinder barrel moved to the latch position of the arm joint that will control, automatic pinning mechanism stretched out, thereby telescoping mechanism is fixed on this arm joint.Then by telescopic oil cylinder this arm joint is driven and stretch out or withdraw.
And it is extremely shown in Figure 4 as Fig. 2, the minor details arm of single oil cylinder joint comprises arm tube 2 and is positioned at the arm head 21 of these arm tube 2 ends, therefore the flexible end 11 of telescopic oil cylinder 1 can move towards arm head 21 along arm tube 2, go out the problem of arm head 21 in order to solve the flexible end 11 of telescopic oil cylinder 1 in the prior art, the utility model provides the position limiting structure of telescopic oil cylinder in a kind of telescopic jib system, this position limiting structure comprises first locating part 3 on the flexible end 11 that is arranged on telescopic oil cylinder 1, and second locating part 4 of this first locating part 3 of backstop, this second locating part and this first locating part 3 are arranged in the arm head 21 or the end of arm tube 2 accordingly.Therefore, the flexible end 11 that can in time prevent telescopic oil cylinder 1 damages the framing member of arm head 21 for example to go out modes such as arm head 21, thereby arrangement by this position limiting structure of appropriate design etc. is avoided the damage of the framing member of 1 pair of arm head 21 of telescopic oil cylinder, and simple in structure, practical.
Need to prove, the embodiment that can realize technique scheme has multiple, for example concrete structure and the arrangement of first locating part 3 and second locating part 4, the utility model for convenience of description, in this introduction preferred implementation wherein, this preferred implementation only is used for explanation the utility model, is not limited to the utility model.
As shown in Figure 3 and Figure 4, in preferred implementation of the present utility model, first locating part 3 comprises the limiting stopper 31 on the flexible end 11 that removably is fixed on telescopic oil cylinder 1.Therefore, limiting stopper 31 be can be convenient for changing, maintenance and the easy maintenance of position limiting structure made.Particularly, on the flexible end 11 mounting bracket 32 is arranged fixedly, for example by welding, makes limiting stopper 31 can be installed in the flexible end 11(cylinder barrel of telescopic oil cylinder 1 by this mounting bracket 32) on.And more preferably, this mounting bracket 32 comprises installation portion 33 that limiting stopper 31 is installed and backstop limiting stopper 31 away from the stopper section 34 of second locating part, 4 motions, and installation portion 33 and stopper section 34 form the L type structure of holding limiting stopper 31.Therefore, when the mutual position-limiting action of first limiting stopper 3 and second limiting stopper 4 takes place, the stopper section 34 on the mounting bracket 32 can this limiting stopper 31 of backstop away from the movement tendency of second locating part 4, make the fixing more firm of this limiting stopper 31.Wherein, this limiting stopper 31 can be removably mounted on the installation portion 31 by fasteners such as screw 35, and stopper section 34 then is preferably firm triangular structure, makes that the integral structure of mounting bracket 32 is more firm.
In addition; impulsive force when with second locating part spacing collision taking place in order to absorb; preferably; limiting stopper 31 in first locating part is elasticity High molecular material piece; can select the described known material of construction that can absorb impact of nylon block, rubber block or other those skilled in the art particularly, all should drop in the protection domain of the present utility model for this type of distortion that does not break away from the utility model design.
For when generation is spacing; thereby can guarantee the stable protection telescopic oil cylinder 1 of position limiting structure; preferably; first locating part 3 is arranged in the sidepiece of the flexible end 11 of telescopic oil cylinder 1; and more preferably be symmetric arrangement; therefore corresponding with first locating part 3 of symmetric arrangement by appropriate design second locating part 4, can protect telescopic oil cylinder 1 not impacted better.Wherein as shown in Figure 3 and Figure 4; preferably; second locating part 4 comprises the limit base that is fixed on arm head 21 inside; certainly in other embodiments; this limit base can also be fixed on the end of arm tube 2; impact the framing member of arm head as long as can prevent the flexible end of telescopic oil cylinder 1, the various set-up modes of second locating part 4 all drop in the protection domain of the present utility model.Particularly, described limit base comprises the spacing end face 41 that is positioned near the end of first locating part 3, and this spacing end face 41 is provided with for flexible end 11 central through holes that penetrate 42.Therefore, as shown in Figure 4, when spacing collision takes place, the flexible end 11 of telescopic oil cylinder 1 can penetrate in this central through hole 42, and because 41 pairs of spacing end faces are arranged in the first locating part 3(limiting stopper 31 of flexible end 11 sidepieces) carry out spacing, especially it is two and when being arranged symmetrically in the both sides of flexible end 11 at first locating part 3, limit base that can be by said structure carries out stable spacing to telescopic oil cylinder 1, and can the body (cylinder barrel) of telescopic oil cylinder 1 not impacted, thereby under the situation that the framing member that guarantees arm head 21 does not damage, can also avoid the damaged in collision to telescopic oil cylinder 1, so the practicality of the position limiting structure that provides of the utility model is stronger.
Wherein particularly, the generation type that forms above-mentioned limit base has multiple, in optimal way of the present utility model, this limit base comprises the side plate of arranging vertically 43 and radially is fixed on the end plate 44 of these side plate 43 ends, wherein this axial arranged side plate 43 can be substantially and the parallel sidewalls of arm head 21, therefore can be provided spacing end face 41 by the outside face of end plate 44, in order further to guarantee the Stability Analysis of Structures of this end plate 44, wherein preferably, limit base also comprises brace panel 45, this brace panel 45 tilts to be fixed between end plate 44 and the side plate 43, that is, can make side plate 43, end plate 44 and brace panel 45 are formed stable triangular structure, make when spacing collision takes place, as the limit base Stability Analysis of Structures of second locating part 4, not fragile.More preferably, brace panel 43 is many, wherein the brace panel 45 of the most close central through hole 42 also comprises parallel-segment except tilting section, this parallel-segment and side plate 43 are substantially parallel to be the structure of right-angled trapezium to form substantially, thereby this parallel-segment can also play the directional tagging to the flexible end 11 that stretches into central through hole 42, and making that the integral structure of limit base is more stable, practicality is stronger.
In preferred implementation of the present utility model, in order further to guarantee when spacing collision takes place, first locating part 3 and second locating part 4 can bump, and can not make the flexible end 11 of telescopic oil cylinder 1 and second locating part 4 bump, preferably, position limiting structure also comprises first locating part 3 is directed to guide 5 on second locating part 4.In a preferred embodiment, this guide 5 can guarantee that the flexible end 11 of telescopic oil cylinder 1 enters in the central through hole 42 of limit base, and can be owing to a variety of causes such as jolt bumps against on the spacing end face 41, can guarantee that the limiting stopper 31 of first locating part 3 contacts with spacing end face 41 this moment, thereby further guarantee the durability of position limiting structure and telescopic oil cylinder 1.
Particularly, guide 5 is for being directed to first locating part 3 guide plate on the spacing end face 41, and this guide plate is two and corresponding with first locating part 3, and all tilts to extend towards second locating part 21 from arm tube 2.As shown in Figure 4, can guarantee at telescopic oil cylinder 1 when arm head 21 moves, the limiting stopper 31 of flexible end 11 both sides of telescopic oil cylinder 1 is under the effect of guide plate, can make flexible end 11 enter in the central through hole 42 of spacing end face 41, and stablize spacing by 41 pairs of limiting stoppers 31 of spacing end face.
To sum up; the position limiting structure that the utility model preferred implementation provides not only can guarantee that telescopic oil cylinder 1 do not go out arm head 21; and the framing member of protection arm head 21; but also can guarantee that telescopic oil cylinder 1 is not collided by stable structure; therefore, the utility model position limiting structure, the telescopic jib system that uses this position limiting structure that provide and the hoisting crane that uses this telescopic jib system all have advantages of high practicability and promotional value.
Below describe preferred implementation of the present utility model by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up by any suitable manner, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. the position limiting structure of telescopic oil cylinder in the telescopic jib system, described telescopic jib system comprises the single oil cylinder joint, the arm head (21) that the minor details arm of this single oil cylinder joint comprises arm tube (2) and is positioned at this arm tube (2) end, described telescopic oil cylinder (1) can save inner axial stretching at this single oil cylinder, moving towards described arm head (21) along described arm tube (2), it is characterized in that, described position limiting structure comprises first locating part (3) on the flexible end (11) that is arranged on described telescopic oil cylinder (1), and second locating part (4) of this first locating part (3) of backstop, this second locating part (4) is arranged in the end or described arm head (21) of described arm tube (2) accordingly with first locating part (3).
2. position limiting structure according to claim 1 is characterized in that, described first locating part (3) comprises the limiting stopper (31) on the flexible end (11) that removably is fixed on described telescopic oil cylinder (1).
3. position limiting structure according to claim 2, it is characterized in that, described flexible end (11) is gone up fixedly mounting bracket (32), this mounting bracket (32) comprises the installation portion (33) of the described limiting stopper of installation (31) and the stopper section (34) that the described limiting stopper of backstop (31) moves away from described second locating part (4), and described installation portion (33) and described stopper section (34) form the L type structure of holding described limiting stopper (31).
4. position limiting structure according to claim 2 is characterized in that, described limiting stopper (31) is elasticity High molecular material piece.
5. position limiting structure according to claim 1, it is characterized in that, described first locating part (3) is arranged in the sidepiece of the flexible end (11) of described telescopic oil cylinder (1), described second locating part (4) comprises the limit base that is fixed on described arm head (3) inside, this limit base comprises the spacing end face (41) that is positioned near the end of described first locating part (3), and this spacing end face (41) is provided with the central through hole (42) that penetrates for described flexible end (11).
6. position limiting structure according to claim 5, it is characterized in that, described limit base comprises the side plate of arranging vertically (43) and radially is fixed on the end plate (44) of this side plate (43) end, described spacing end face (41) is provided by described end plate (44), and described limit base also comprises brace panel (45), and this brace panel (45) tilts to be fixed between described end plate (44) and the described side plate (43).
7. position limiting structure according to claim 1 is characterized in that, described position limiting structure also comprises described first locating part (3) is directed to guide (5) on described second locating part (4).
8. position limiting structure according to claim 7, it is characterized in that, described first locating part (3) is two and is arranged symmetrically in the both sides of the flexible end (11) of described telescopic oil cylinder (1), described second locating part (4) comprises the limit base that is fixed on described arm head (3) inside, this limit base comprises the spacing end face (41) that is positioned near the end of described first locating part (3), and this spacing end face (41) is provided with the central through hole (42) that penetrates for described flexible end (11), described guide (5) is for being directed to described first locating part (3) guide plate on the described spacing end face (41), this guide plate is two and corresponding with described first locating part (3), and all tilts to extend towards described second locating part (21) from described arm tube (2).
9. a telescopic jib system is characterized in that, this telescopic jib system comprises among the claim 1-8 position limiting structure of telescopic oil cylinder in any described telescopic jib system.
10. a hoisting crane is characterized in that, described hoisting crane comprises the described telescopic jib of claim 9 system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745971 CN203048456U (en) | 2012-12-31 | 2012-12-31 | Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745971 CN203048456U (en) | 2012-12-31 | 2012-12-31 | Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203048456U true CN203048456U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220745971 Expired - Lifetime CN203048456U (en) | 2012-12-31 | 2012-12-31 | Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system and crane |
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| Country | Link |
|---|---|
| CN (1) | CN203048456U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986674A (en) * | 2015-07-31 | 2015-10-21 | 徐州重型机械有限公司 | Telescopic arm structure, suspension arm structure and crane |
| CN105565188A (en) * | 2015-12-29 | 2016-05-11 | 中联重科股份有限公司 | Structure and method for preventing oil cylinder from rushing out of knuckle arm and suspension arm |
| CN106458542A (en) * | 2014-05-19 | 2017-02-22 | 株式会社多田野 | Automatic boom extension/contraction device for work machine |
| CN111217261A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Crane and telescopic arm thereof |
| CN111217262A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Flexible single armed and hoist |
-
2012
- 2012-12-31 CN CN 201220745971 patent/CN203048456U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106458542A (en) * | 2014-05-19 | 2017-02-22 | 株式会社多田野 | Automatic boom extension/contraction device for work machine |
| US9868617B2 (en) | 2014-05-19 | 2018-01-16 | Tadano Ltd. | Automatic boom telescopic motion apparatus for working machine |
| CN106458542B (en) * | 2014-05-19 | 2019-01-15 | 株式会社多田野 | The boom automatic extending-contracting apparatus of Work machine |
| CN104986674A (en) * | 2015-07-31 | 2015-10-21 | 徐州重型机械有限公司 | Telescopic arm structure, suspension arm structure and crane |
| CN104986674B (en) * | 2015-07-31 | 2017-01-25 | 徐州重型机械有限公司 | Telescopic arm structure, suspension arm structure and crane |
| CN105565188A (en) * | 2015-12-29 | 2016-05-11 | 中联重科股份有限公司 | Structure and method for preventing oil cylinder from rushing out of knuckle arm and suspension arm |
| CN111217261A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Crane and telescopic arm thereof |
| CN111217262A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Flexible single armed and hoist |
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| CX01 | Expiry of patent term |