CN203670348U - Single-cylinder bolt type retractable oil cylinder, retractable arm and engineering mechanical device - Google Patents
Single-cylinder bolt type retractable oil cylinder, retractable arm and engineering mechanical device Download PDFInfo
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- CN203670348U CN203670348U CN201320794430.6U CN201320794430U CN203670348U CN 203670348 U CN203670348 U CN 203670348U CN 201320794430 U CN201320794430 U CN 201320794430U CN 203670348 U CN203670348 U CN 203670348U
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Abstract
The utility model relates to a single-cylinder bolt type retractable oil cylinder, a retractable arm and an engineering mechanical device. The single-cylinder bolt type retractable oil cylinder comprises a cylinder barrel and a piston rod, wherein the cylinder barrel or the piston rod is fixedly connected with a basic joint arm. The single-cylinder bolt type retractable oil cylinder further comprises at least two cylinder heads fixedly connected to the cylinder barrel or the piston rod at intervals. When the piston rod is connected with the basic joint arm, the cylinder heads are selectively connected with any joint arm; when a cylinder pin extends out or retracts, the cylinder barrel selectively locks or releases the relative position of the cylinder barrel and any joint arm, and the reciprocating motion of the cylinder barrel drives the joint arm locked by the cylinder barrel to do retractable movement. When the cylinder barrel is connected with the basic joint arm, the cylinder heads are selectively connected with any joint arm; when the cylinder pin extends out or retracts, the piston rod selectively locks or releases the relative position of the piston rod and any joint arm, and the reciprocating motion of the piston rod drives the joint arm locked by the piston rod to do retraction movement. The single-cylinder bolt type retractable oil cylinder can solve the problems that due to the fact that a retractable oil cylinder of a single-cylinder bolt type hoist is too long, the reliability of the retractable oil cylinder is low and the retractable oil cylinder is difficult to design.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of single cylinder bolt-type telescopic oil cylinder, the telescopic boom that is provided with this single cylinder bolt-type telescopic oil cylinder and engineering mechanical device.
Background technique
Existing single cylinder bolt-type telescopic oil cylinder is arranged a cylinder head on cylinder barrel, and main dependence increases the length of telescopic oil cylinder and realize semi-girder from full reduced to 100% entirely stretch.In semi-girder inner structure as shown in Figure 1, it comprises piston rod 1 ' and cylinder barrel 2 ' to telescopic oil cylinder, and cylinder barrel 2 ' supports fixing by oil cylinder guiding trestle 3 '.Telescopic boom comprise fundamental segment arm 4 ', minor details arm 5 ' and be socketed in fundamental segment arm 4 ' and minor details arm 5 ' between some middle node arms 6 '.A in figure refers to the leading portion of joint arm, and b refers to the back segment of joint arm.The relative position being provided with between the joint arm that arm pin 8 ', two is adjacent between two adjacent joint arms can optionally be locked or be discharged by arm pin 8 '.Piston rod 1 ' is fixedly connected with fundamental segment arm 4 ', and therefore the flexible of cylinder barrel 2 ' can drive stretching out and retraction of each joint arm.The afterbody of cylinder barrel 2 ' is provided with cylinder head 7 ', and cylinder head 7 ' optionally locks or discharge the relative position of itself and arbitrary joint arm, realizes the flexible of this joint arm by the to-and-fro motion of cylinder barrel 2 ' simultaneously.
Shown in Fig. 2 is the structural representation of cylinder head 7 '.As shown in Figure 2, cylinder head 7 ' comprises cylinder head body 70 ', drives oil cylinder 71 ', dovetail groove 72 ' and cylinder pin 73 '.Wherein: when cylinder pin 73 ' stretches out or regains, optionally lock or discharge the relative position of itself and arbitrary joint arm, mainly realize the separation between telescopic oil cylinder and telescopic boom and be connected.Dovetail groove 72 ' is driving under the effect of oil cylinder 71 ', mainly realizes in telescopic boom the separation between adjacent two arms joints and is connected.
Shown in Fig. 3 is the structural representation of existing telescopic oil cylinder, this figure be take single cylinder bolt-type telescopic oil cylinder stretch out and retraction one-period describes as example the working procedure of telescopic oil cylinder.Piston rod 1 ' is fixed on the fundamental segment arm 4 ' of telescopic boom by articulating point, and (fundamental segment arm 4 ' is arranged in Fig. 4 left side, and not shown) on, rely on the to-and-fro motion of cylinder barrel 2 ' to realize the flexible of telescopic boom, cylinder barrel 2 ' connects with telescopic boom by cylinder head 7 '.Stretch out in process at telescopic oil cylinder, first rely on the upper corresponding detecting switch of cylinder head 7 ' to find arm position (position of arm joint), rely on cylinder pin 73 ' in cylinder head 7 ' to realize connecting of telescopic oil cylinder and telescopic boom, dovetail groove 72 ' on cylinder head 7 ' is pulled up arm pin 8 ' from arm pin-and-hole 9 ', realizes the separation between arm joint; Then telescopic oil cylinder rodless cavity is protruding together with the arm joint in telescopic boom by cylinder head 7 ' under the effect of high pressure oil, until extend 100% the state of entirely stretching; Otherwise the arm joint in telescopic oil cylinder and telescopic boom is retracted.Telescopic oil cylinder can disposablely be realized every joint arm from disposable 100% the state of entirely stretching that extends of full reduced state.
Existing telescopic oil cylinder completes a flexible periodic process as shown in Fig. 1 and 4-6, shown in Fig. 1 is that arm saves full reduced view, shown in Fig. 4 is the view that the arm position of minor details arm is found in cylinder head retraction, shown in Fig. 5 is that cylinder head finds minor details arm arm position, inserts cylinder pin and pull up the view of arm pin, and shown in Fig. 6 is that minor details arm extends 5 joint arm leading portion arm pin-and-holes and inserts the view of arm pin.So far, telescopic oil cylinder completes the process of once stretching out, and too much statement is not just done in the retraction of telescopic oil cylinder and stretch out similarly here.
Due to telescopic oil cylinder be realize flexible process in the inside of telescopic boom and stroke larger, its reliability and stability reduce, want to guarantee that telescopic oil cylinder can be reliable and stable flexible, must increase the thickness of piston rod and cylinder barrel, increase oil cylinder guiding trestle at cylinder barrel outer wall simultaneously, guarantee that telescopic oil cylinder can not fall cylinder and inclination in semi-girder inside.Because telescopic oil cylinder length is longer, its telescopic process needs more hydraulic oil, and hydraulic system needs the fuel tank that configuration capacity is larger to realize flexible process.This will cause the gross weight of crane excessive, has limited the overall performance of hoist, and product is had a great impact in the competitive advantage of construction machinery industry.This shows, there is following problem in current telescopic oil cylinder:
1) cost is high.The stroke of telescopic oil cylinder is greater than the stroke that single-unit arm stretches out, and the length of telescopic oil cylinder is longer.The cylinder barrel of long-cylinder and the processing of cylinder bar are very difficult, and its process equipment and processing technology are had to higher requirement, and the overall cost that causes telescopic oil cylinder to be produced is larger.
2) weight is large.Telescopic oil cylinder length is longer, and in telescopic process, cylinder barrel need to bear larger radial load, so telescopic oil cylinder needs thicker cylinder diameter and bar footpath in design process, and the oil cylinder guiding trestle for ensureing that its flexible stability need to be longer simultaneously; Flexible normally compared with long-cylinder for ensureing stroke, need the fuel tank that configuration capacity is larger, cause crane gross weight larger.
3) reliability is poor.Due to telescopic oil cylinder in semi-girder, move and stroke longer, cause telescopic oil cylinder easily to occur falling cylinder and cylinder head tilt phenomenon in telescopic boom inside, because oil cylinder own wt is larger, in telescopic process, the arm tail support zone of cylinder bracket and each joint arm produces larger friction, easily causes the shake of telescopic oil cylinder and violent sound.
Model utility content
The purpose of this utility model is to propose a kind of single cylinder bolt-type telescopic oil cylinder, telescopic boom and engineering mechanical device, and its telescopic oil cylinder that can solve single cylinder bolt-type is long, causes that its reliability is lower, the problem of difficult design.
For achieving the above object, the utility model provides following technological scheme:
A kind of single cylinder bolt-type telescopic oil cylinder, comprises cylinder barrel and piston rod, wherein: cylinder barrel or piston rod are fixedly connected with the fundamental segment arm in telescopic boom; Also comprise at least two cylinder heads that are fixedly connected on spaced reciprocally on cylinder barrel or piston rod; Under the state that piston rod is fixedly connected with fundamental segment arm, cylinder head is optionally connected with arbitrary joint arm in telescopic boom under different operating modes, cylinder barrel can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin stretches out or regains, and the to-and-fro motion of cylinder barrel can drive the joint arm being locked to carry out expanding-contracting action; Under the state that cylinder barrel is fixedly connected with fundamental segment arm, cylinder head is optionally connected with arbitrary joint arm in telescopic boom under different operating modes, piston rod can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin stretches out or regains, and the to-and-fro motion of piston rod can drive the joint arm being locked to carry out expanding-contracting action.
Further, under the full reduced state of telescopic boom, be fixedly connected with near the cylinder head of fundamental segment arm in telescopic boom and the second section arm of adjacent fundamental segment arm.
Further, also comprise the oil cylinder guiding trestle for supporting stator bore.
A kind of telescopic boom, comprises fundamental segment arm, minor details arm, some middle node arms and arm pin, wherein: some middle node arms are socketed between fundamental segment arm and minor details arm; Relative position between two adjacent segments arms can optionally be locked or be discharged by arm pin; Also comprise the single cylinder bolt-type telescopic oil cylinder in the various embodiments described above.
A kind of engineering mechanical device that comprises telescopic boom in above-described embodiment.
Further, engineering mechanical device is hoist.
Based on technique scheme, the utility model has the advantages that:
Because the utility model is on the basis of the structure of existing single cylinder bolt-type telescopic oil cylinder, on cylinder barrel or piston rod, be provided with multiple cylinder heads, cylinder head is optionally connected with arbitrary joint arm in telescopic boom under different operating modes, cylinder barrel can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin stretches out or regains, the to-and-fro motion of cylinder barrel or piston rod can drive the joint arm being locked to carry out expanding-contracting action, therefore the utility model is on the cylinder barrel of former telescopic oil cylinder, shorten the total length of telescopic oil cylinder by increasing cylinder head, reduce the bar footpath of cylinder diameter and the piston rod of cylinder barrel, reduce cost of production, reduced the weight of telescopic oil cylinder simultaneously, the gross weight of getting on the bus is reduced, make the design of hoist semi-girder have larger space.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the connection diagram of single cylinder bolt-type telescopic oil cylinder and telescopic boom in prior art;
Fig. 2 is the structural representation of cylinder head in Fig. 1;
Fig. 3 is the structural representation of single cylinder bolt-type telescopic oil cylinder in Fig. 1;
The view that Fig. 4-6 drive telescopic boom to stretch out for telescopic oil cylinder in prior art;
Fig. 7 is an embodiment's of single cylinder bolt-type telescopic oil cylinder provided by the utility model structural representation;
The view that Fig. 8-13 drive telescopic boom to stretch out for telescopic oil cylinder in the utility model.
Embodiment
For object, technological scheme and advantage that the utility model is implemented are clearer, below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Described embodiment is the utility model part embodiment, rather than whole embodiments.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as the restriction to the utility model protection domain.
Shown in Fig. 7 is single cylinder bolt-type telescopic oil cylinder one embodiment's structural representation.As shown in Figure 7, the telescopic oil cylinder in the present embodiment comprises cylinder barrel 1, piston rod 2, at least two cylinder heads 3 and oil cylinder guiding trestles 6, and wherein: each cylinder head 3 is fixedly connected on cylinder barrel 1 spaced reciprocally, piston rod 2 is fixedly connected with the fundamental segment arm 4 in telescopic boom.The both sides of each cylinder head 3 are provided with cylinder pin 5, when cylinder pin 5 stretches out, cylinder head 3 and the joint arm of telescopic boom can be interconnected and lock together, when cylinder pin 5 is regained, cylinder head 3 can be separated with the mutual release of joint arm of telescopic boom, thereby be realized locking and the release of arbitrary joint arm in cylinder head 3 and telescopic boom.
The utility model is for the long drawback of the length of existing telescopic oil cylinder, on the cylinder barrel of former telescopic oil cylinder, shorten the total length of telescopic oil cylinder by increasing cylinder head, reduce the bar footpath of cylinder diameter and the piston rod of cylinder barrel, reduce cost of production, reduced the weight of telescopic oil cylinder, the gross weight of getting on the bus is reduced simultaneously, makes the design of hoist semi-girder have larger space.
Below all describe as an example of the single casing bolt-type crane telescopic oil cylinder of two cylinder heads example, the cylinder head 3 in cylinder barrel 1 left side in definition Fig. 8-13 is the first cylinder head, and the cylinder head 3 on right side is the second cylinder head.As shown in Figure 1, the joint arm of telescopic oil cylinder is divided into leading portion a and back segment b according to stretching out direction, and the first cylinder head is responsible for the flexible of leading portion a, and the second cylinder head is responsible for the flexible of back segment b.
The utility model mainly relies on the principle of relative movement.Piston rod 2 is fixed on fundamental segment arm 4, keeps relative static conditions with fundamental segment arm 4.Cylinder barrel 1 is piston rod 2 to-and-fro motion relatively under the effect of fluid.The first cylinder head and the second cylinder head that are fixed on cylinder barrel 1 connect from different joint arms under different operating modes, complete different the flexible of arms that save in telescopic boom simultaneously.
As shown in Figure 8, shown in Fig. 8 is telescopic oil cylinder initial position view in telescopic boom, and telescopic boom, in full reduced state, is fixedly connected with near the cylinder head of fundamental segment arm 4 in telescopic boom and the second section arm 12 of adjacent fundamental segment arm 4.
Because cylinder head keeps static with cylinder barrel all the time, be that the action of cylinder head and the expanding-contracting action of cylinder barrel 1 are synchronous, when therefore the first cylinder head is found minor details arm 9, cylinder barrel 1 also can protruding (stretching out to the right in figure) under fluid effect, find after minor details arm 9, stretch out cylinder pin 5 and lock with minor details arm 9.Shown in Fig. 9 is that the first cylinder head finds minor details arm, and the two view locking together by cylinder pin.
After the first cylinder head and the locking of minor details arm, by regaining arm pin 10, minor details arm 9 and joint arm 11 second from the bottom are discharged, now cylinder barrel 1 continues protruding under fluid effect, thereby can drive minor details arm to stretch out, until the leading portion a of minor details arm stretches out completely, shown in Figure 10 is the view that the leading portion a of minor details arm stretches out completely.
Then, utilize arm pin 10 to relock on minor details arm 9 and joint arm 11 second from the bottom.Moreover, by regaining cylinder pin 5, the first cylinder head and minor details arm 9 being discharged, the second cylinder head starts to find minor details arm 9, and the action of this searching namely cylinder barrel 3 is retracted (in Figure 11 towards left movement) inwardly, finds after minor details arm 9, stretches out cylinder pin 5 and minor details arm 9 and locks.Shown in Figure 11 is that the second cylinder head finds minor details arm 9, and the two view locking together by cylinder pin.
Moreover, after the second cylinder head and 9 lockings of minor details arm, by regaining arm pin 10, minor details arm 9 and joint arm 11 second from the bottom are discharged, now cylinder barrel 1 continues protruding under fluid effect, thereby can drive minor details arm to stretch out, until the back segment b of minor details arm stretches out completely, shown in Figure 12 is the view that the back segment b of minor details arm stretches out completely.
Finally, utilize arm pin 10 to relock on minor details arm 9 and joint arm 11 second from the bottom.Above process is that minor details arm 9 stretches out process completely.
Then, regain cylinder barrel 1 and itself and joint arm 11 second from the bottom are locked, then joint arm 11 second from the bottom is discharged with joint arm 12 third from the bottom, now, the first cylinder head can start to find joint arm 11(second from the bottom as shown in figure 13), can realize by that analogy stretching out successively of each joint arm.
Certainly, the retraction that realizes each joint arm is contrary with said process, does not repeat them here.
It should be noted that, under the state being fixedly connected with fundamental segment arm 4 at cylinder barrel 1, piston rod 2 can the situation of free-extension under, cylinder head 3 can arrange on piston rod 2, set-up mode is with to be arranged on situation on cylinder barrel 1 consistent, now piston rod 2 can optionally be connected with arbitrary joint arm in telescopic boom under different operating modes, piston rod 2 can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin 5 stretches out or regains, and the to-and-fro motion of piston rod 2 can drive the joint arm being locked to carry out expanding-contracting action.Realize stretching out of each joint arm consistent with foregoing description process with the process of retracting, be not described in detail in this.
In addition, the number of cylinder head 3 is not only confined to the number in above-described embodiment, can also arrange more according to the demand of operating mode.
The utility model also provides a kind of telescopic boom, and it comprises the single cylinder bolt-type telescopic oil cylinder in fundamental segment arm, minor details arm, some middle node arms, arm pin and the various embodiments described above.Wherein: some middle node arms are socketed between fundamental segment arm and minor details arm, and the relative position between two adjacent segments arms can optionally be locked or be discharged by arm pin.Single cylinder bolt-type telescopic oil cylinder respectively saves connection between arm and matching relationship and has all set forth clearly above, does not repeat them here.
The utility model also provides a kind of engineering mechanical device, and it comprises the telescopic boom in above-described embodiment, and the other parts of described engineering mechanical device can be with reference to prior art, no longer launches herein to describe.Described engineering mechanical device can be hoist.
In sum, the utlity model has following advantage:
1, cost is low.The fore and aft motion of telescopic oil cylinder adopts relative motion principle, flexible two steps that are divided into of telescopic boom are completed, the stroke of telescopic oil cylinder reduces, length can be shorter, piston rod and cylinder barrel also can shorten, process more convenient, to the step-down that requires of process equipment and processing technology, so the overall cost of telescopic oil cylinder significantly reduces.
2, weight is little.Telescopic oil cylinder length shortens, the gross weight of self declines, so the radial load that cylinder barrel need to bear in telescopic process diminishes, so telescopic oil cylinder is in design process, the size in the bar footpath that reduces cylinder barrel cylinder diameter and piston rod that can be suitable under the prerequisite that guarantees stability, because the stroke of telescopic oil cylinder shortens, suitably the less fuel tank of configuration capacity, has reduced the gross weight of getting on the bus.
3, reliability is high.Because telescopic oil cylinder stroke and length shorten, its machining accuracy is higher, stability and the reliability of telescopic oil cylinder are higher, due to reducing of telescopic oil cylinder own wt, the frictional force that cylinder bracket and each joint arm arm tail support zone produce in telescopic process diminishes, add appropriate lubricating at this position, the shake of oil cylinder and friction sound can be eliminated, stability is significantly improved.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model 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 characteristics is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (6)
1. a single cylinder bolt-type telescopic oil cylinder,
Comprise cylinder barrel and piston rod, wherein:
Cylinder barrel or piston rod are fixedly connected with the fundamental segment arm in telescopic boom;
It is characterized in that:
Also comprise at least two cylinder heads that are fixedly connected on spaced reciprocally on cylinder barrel or piston rod;
Under the state that piston rod is fixedly connected with fundamental segment arm, cylinder head is optionally connected with arbitrary joint arm in telescopic boom under different operating modes, cylinder barrel can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin stretches out or regains, and the to-and-fro motion of cylinder barrel can drive the joint arm being locked to carry out expanding-contracting action;
Under the state that cylinder barrel is fixedly connected with fundamental segment arm, cylinder head is optionally connected with arbitrary joint arm in telescopic boom under different operating modes, piston rod can optionally lock or discharge the relative position of itself and arbitrary joint arm in the time that cylinder pin stretches out or regains, and the to-and-fro motion of piston rod can drive the joint arm being locked to carry out expanding-contracting action.
2. single cylinder bolt-type telescopic oil cylinder as claimed in claim 1,
It is characterized in that:
Under the full reduced state of telescopic boom, be fixedly connected with near the cylinder head of fundamental segment arm in telescopic boom and the second section arm of adjacent fundamental segment arm.
3. single cylinder bolt-type telescopic oil cylinder as claimed in claim 2,
It is characterized in that:
Also comprise the oil cylinder guiding trestle for supporting stator bore.
4. a telescopic boom,
Comprise fundamental segment arm, minor details arm, some middle node arms and arm pin, wherein:
Some middle node arms are socketed between fundamental segment arm and minor details arm;
Relative position between two adjacent segments arms can optionally be locked or be discharged by arm pin;
It is characterized in that:
Also comprise the single cylinder bolt-type telescopic oil cylinder as described in any one in claim 1-3.
5. an engineering mechanical device,
It is characterized in that:
Comprise telescopic boom as claimed in claim 4.
6. engineering mechanical device as claimed in claim 5,
It is characterized in that:
Engineering mechanical device is hoist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320794430.6U CN203670348U (en) | 2013-12-05 | 2013-12-05 | Single-cylinder bolt type retractable oil cylinder, retractable arm and engineering mechanical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320794430.6U CN203670348U (en) | 2013-12-05 | 2013-12-05 | Single-cylinder bolt type retractable oil cylinder, retractable arm and engineering mechanical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203670348U true CN203670348U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320794430.6U Expired - Fee Related CN203670348U (en) | 2013-12-05 | 2013-12-05 | Single-cylinder bolt type retractable oil cylinder, retractable arm and engineering mechanical device |
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| Country | Link |
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| CN (1) | CN203670348U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603844A (en) * | 2013-12-05 | 2014-02-26 | 徐州重型机械有限公司 | Single-cylinder pin type telescopic cylinder, telescopic arm and engineering machine equipment |
| WO2015027918A1 (en) * | 2013-08-27 | 2015-03-05 | 徐州重型机械有限公司 | Single-acting pin-type telescoping arm, telescoping method thereof, and crane having the telescoping arm |
| CN105460809A (en) * | 2014-12-17 | 2016-04-06 | 徐州重型机械有限公司 | Stretching and retracting control system and method for telescopic boom and crane |
| CN111039199A (en) * | 2019-12-30 | 2020-04-21 | 徐州重型机械有限公司 | Single-cylinder bolt type telescopic boom and crane |
-
2013
- 2013-12-05 CN CN201320794430.6U patent/CN203670348U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015027918A1 (en) * | 2013-08-27 | 2015-03-05 | 徐州重型机械有限公司 | Single-acting pin-type telescoping arm, telescoping method thereof, and crane having the telescoping arm |
| US10077173B2 (en) | 2013-08-27 | 2018-09-18 | Xuzhou Heavy Machinery Co., Ltd. | Single-cylinder plug pin type telescopic arm, telescopic method thereof and crane having telescopic arm |
| CN103603844A (en) * | 2013-12-05 | 2014-02-26 | 徐州重型机械有限公司 | Single-cylinder pin type telescopic cylinder, telescopic arm and engineering machine equipment |
| CN105460809A (en) * | 2014-12-17 | 2016-04-06 | 徐州重型机械有限公司 | Stretching and retracting control system and method for telescopic boom and crane |
| CN111039199A (en) * | 2019-12-30 | 2020-04-21 | 徐州重型机械有限公司 | Single-cylinder bolt type telescopic boom and crane |
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Granted publication date: 20140625 Termination date: 20211205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |