CN205346686U - Flexible arm structure and hoist with go back to mechanism of contracting - Google Patents
Flexible arm structure and hoist with go back to mechanism of contracting Download PDFInfo
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- CN205346686U CN205346686U CN201521138249.5U CN201521138249U CN205346686U CN 205346686 U CN205346686 U CN 205346686U CN 201521138249 U CN201521138249 U CN 201521138249U CN 205346686 U CN205346686 U CN 205346686U
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Abstract
The utility model discloses a flexible arm structure and hoist with go back to mechanism of contracting relates to engineering machine tool field for realize flexible arm structure not smooth the returning under the condition of steeving contract. Should flexible arm structure include the flexible arm of multisection and go back to the mechanism of contracting, returning the flexible arm drive contract the mechanism and to be located minor details and being connected, the flexible arm that the mechanism of time contracting can drive minor details time contracts. The flexible arm structure that above -mentioned technical scheme provided has go back to the mechanism of contracting, is returning when contracting flexible arm, drives the minor details arm and returns and contract through going back to the mechanism of contracting, can promote time minor details arm after the minor details arm returns and contracts and time contract to this analogizes, contracts until realizing each section the returning of arm except that basic arm. Through retraction mechanism, can realize the smooth retraction of telescopic jib (boom) under the condition of steeving not.
Description
Technical field
This utility model relates to engineering machinery field, is specifically related to a kind of telescopic arm structure with cam mechanism and crane.
Background technology
At present, the telescopic boom crane arm of five joint arms and following arm joint, generally adopt oil cylinder to add rope formula telescoping mechanism, this telescoping mechanism pulley arrangements takes up room greatly, and arm changes of section is shunk relatively big, and large arm farm labourer's condition lifting performance is relatively low.When carrying out telescopic arm operation by telescopic oil cylinder, flexible and steel wire rope composition of pulling back telescoping mechanism, the arm joint that is mutually related can only be stretched out simultaneously or retract.Meanwhile, this telescoping mechanism steel wire rope arranges that span is big, length is long, easily causes the problem such as the flexible shake of crane arm, steel wire rope looseness beating cylinder, and reliability is relatively low；It addition, steel wire rope dismounting and maintenance difficulty in this telescoping mechanism are bigger.
The telescopic boom crane arm of the five joint above arm joint of arm, it is common to adopting horizontal bar bolt mechanism to stretch, it includes a telescopic oil cylinder, bolt mechanism, cylinder pin, arm pin and travel switch etc..This horizontal bar bolt mechanism structure complexity, structural design and manufacturing process are complex, and processing, assembly precision require height, unstable properties.Additionally, use the crane arm of this telescoping mechanism band load not stretch, it is impossible to realizing the consecutive variations of brachium, brachium change kind is less, and telescopic arm stretches out and the time of retracting is long.
Boom telescoping device: crane telescopic mechanism is the crux parts of Telescopic crane, and the carrying when extension and contraction control of crane arm and lift heavy is all realized by telescoping mechanism.
Oil cylinder adds rope formula: the most frequently used version of medium and small tonnage crane telescopic mechanism, carries out telescopic arm operation by telescopic oil cylinder, flexible and pull back steel wire rope and pulley composition mechanism；
Horizontal bar bolt-type: the version that middle hoister in large tonnage telescoping mechanism is commonly used, by the mechanism controls telescopic arm operation that telescopic oil cylinder, bolt mechanism, cylinder pin, arm pin and travel switch etc. form.
It is the structural representation of multistage hydraulic cylinder telescoping mechanism in prior art referring to Fig. 1, Fig. 1.
This telescoping mechanism includes basic arm sheathed successively and multiple telescopic arm and multistage hydraulic cylinder, and wherein, the progression of multi-stage expansion oil cylinder is identical with the quantity of telescopic arm, as shown in Figure 1.Telescoping mechanism specifically includes basic arm 81, two and saves arm 82, three joint arm 83, four joint arm 84, five joint arm 85 and multistage hydraulic cylinder 86.Multistage hydraulic cylinder 86 includes piston rod 91, one-level cylinder tube 90,89, three grades of cylinder tubes 88 of two-level oil cylinder's cylinder barrel and level Four hydraulic cylinder 87.
Multistage hydraulic cylinder telescoping mechanism operation principle: as shown in Figure 1, one end of multistage hydraulic cylinder is connected to basic arm, the other end is connected to last telescopic arm in multistage telescopic arm, cylinder barrels at different levels between multistage hydraulic cylinder two ends are connected to each telescopic arm corresponding, by stretching out oil cylinder at different levels and piston rod, it may be achieved the optional of each telescopic arm stretches out accordingly.Namely can select to stretch out any one or more telescopic arm, it is possible to stretch out any brachium.
Inventor have found that prior art at least exists following problems:
According to prior art and manufacturing capacity, actual more than the three grades controllable retraction operation of double-acting multistage hydraulic cylinder can not be realized.
More than three grades multistage hydraulic cylinder telescoping mechanisms of existing use and similar telescoping mechanism product, the deadweight of commonly used dependence crane arm arm joint realizes stretching out the retraction operation of arm joint, use procedure exist following not enough: crane arm must be steeved and be reached certain angle and could realize stretching out the retraction of arm joint, the retract action stretching out arm joint cannot be started less than this angle, and cannot complete to stretch out the retraction operation of arm joint in height-limited space, operation limiting factor is more, indirectly limits the use scope of crane.
Utility model content
One of them purpose of the present utility model is to propose a kind of telescopic arm structure with cam mechanism and crane, in order to realize the smooth retraction that telescopic arm structure is not steeved in situation.
For achieving the above object, this utility model provides techniques below scheme:
This utility model provides a kind of telescopic arm structure with cam mechanism, including multi-stage telescopic arms and cam mechanism；Described multi-stage telescopic arms includes basic arm, intermediate arm and minor details arm, and described cam mechanism drives with described minor details arm and is connected, and described cam mechanism can pass through to drive described minor details arm to bounce back to drive described intermediate arm to bounce back relative to described telescopic arm basic arm.
In an alternate embodiment of the invention, described cam mechanism includes contracting arm elevator and drive mechanism, and one end of described drive mechanism is connected with described contracting arm elevator, and the other end of described drive mechanism is connected with described minor details arm.
In an alternate embodiment of the invention, described drive mechanism includes contracting arm steel wire rope and assembly pulley, one end of described contracting arm steel wire rope is connected with described contracting arm elevator, and the middle part of described contracting arm steel wire rope is at each pulley room wiring of described assembly pulley, and the other end of described contracting arm steel wire rope is connected with described minor details arm.
In an alternate embodiment of the invention, telescopic arm structure also includes exposure mechanism, and described exposure mechanism drives with described intermediate arm and described minor details arm and is connected, to drive described intermediate arm and described minor details arm to stretch out.
In an alternate embodiment of the invention, described exposure mechanism includes multistage hydraulic cylinder and controls valve group, and the piston rod of described multistage hydraulic cylinder and described basic arm are fixed, and final stage cylinder barrel and described minor details arm are fixed, and middle cylinder barrels at different levels are fixed with described intermediate arm respectively；Described control valve group stretches out order for what control described intermediate arm and described minor details arm.
In an alternate embodiment of the invention, described control valve group includes multiple sequence valve group, and each described sequence valve group individually controls described intermediate arm and stretches out pressure to the wherein joint in described minor details arm.
In an alternate embodiment of the invention, the unlatching pressure of each described sequence valve group is different；Or the unlatching pressure of part described sequence valve group is identical.
In an alternate embodiment of the invention, described sequence valve group includes the sequence valve and the check valve that are connected in parallel, and the opening direction of described sequence valve and described check valve is contrary.
Described contracting arm elevator adopts split type difunctional elevator in an alternate embodiment of the invention.
The embodiment of the present invention also provides for a kind of crane, including the telescopic arm structure that any technology scheme of the present invention provides.
Based on technique scheme, this utility model embodiment at least can produce following technique effect:
The telescopic arm structure that technique scheme provides, has cam mechanism, when bouncing back telescopic arm, drives minor details arm retraction by cam mechanism, can promote time minor details arm retraction after minor details arm retraction, by that analogy, until realizing each retraction saving arm except basic arm.Pass through cam mechanism, it is possible to achieve the telescopic arm smooth retraction in situation of not steeving.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes the part of the application, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of multistage hydraulic cylinder telescoping mechanism in prior art；
The telescopic arm structure schematic diagram that Fig. 2 provides for this utility model embodiment；
Sequence control valve group schematic diagram in the telescopic arm structure that Fig. 3 a provides for this utility model embodiment；
In the telescopic arm structure that Fig. 3 b provides for this utility model embodiment, sequence control valve group arranges position view；
Fig. 4 a realizes the schematic diagram of arm joint sequential telescopic for the telescopic arm structure that this utility model embodiment provides；
Fig. 4 b realizes, for the telescopic arm structure that this utility model embodiment provides, the schematic diagram that arm joint selectivity is flexible；
The schematic diagram of the telescopic arm structure contracting arm elevator that Fig. 5 provides for this utility model embodiment；
The full reduced view of telescopic arm structure that Fig. 6 provides for this utility model embodiment；
Fig. 7 stretches out the complete machine schematic diagram of state for the crane arm that this utility model embodiment provides；
The crane arm that Fig. 8 provides for this utility model embodiment reclaims complete machine schematic diagram.
Accompanying drawing labelling:
1, split type difunctional elevator；2, drive mechanism；3, basic arm；
4, two joint arm；5, three joint arm；6, four joint arm；
7, five joint arm；8, six joint arm；9, seven joint arm；
10, piston rod；11, one-level cylinder tube；12, two-level oil cylinder's cylinder barrel；
13, three grades of cylinder tubes；14, level Four cylinder tube；15, Pyatyi cylinder tube；
16, six grades of hydraulic cylinders；17, multistage hydraulic cylinder；18, contracting arm elevator；
19, auxiliary work elevator；20, load cable；21, contracting arm steel wire rope；
22, sequence valve group；24, assembly pulley；25, sequence valve；
26, check valve；81, basic arm；82, two joint arm；
83, three joint arm；84, four joint arm；85, five joint arm；
86, multistage hydraulic cylinder；87, level Four hydraulic cylinder；88, three grades of cylinder tubes；
89, two-level oil cylinder's cylinder barrel；90, one-level cylinder tube；91, piston rod.
Detailed description of the invention
Elaboration specifically is carried out below in conjunction with Fig. 2～Fig. 8 technical scheme that this utility model is provided.
This utility model embodiment provides a kind of telescopic arm structure, including multi-stage telescopic arms and cam mechanism；Multi-stage telescopic arms includes basic arm, intermediate arm and minor details arm, and cam mechanism drives with minor details arm and is connected, and cam mechanism can pass through to drive minor details arm retraction to drive intermediate arm to bounce back relative to telescopic arm basic arm.
Telescopic arm structure includes sheathed multi-stage telescopic arms, for Fig. 2, is respectively as follows: basic arm 3, two from left to right and saves arm 4, three joint arm 5 ... minor details arm.If intermediate arm one saves, then whole telescopic arm structure includes 3 joint telescopic arms；If the quantity of intermediate arm is 5 joints, then whole telescopic arm structure includes 7 joint telescopic arms, saves for 7 in the present embodiment.In Fig. 2, basic arm 3 saves arm as head, saves arms 9 as minor details arm using seven.Two joint arms 4 to six save arm 8 all as intermediate arm.Basic arm 3 is fixing with the piston rod 10 of multistage hydraulic cylinder 17, and other respectively save arm and fix with a cylinder barrel respectively.
This telescopic arm structure can contain the crane arm of the different joint numbers such as 3 to 8 joints.
The telescopic arm structure that technique scheme provides, has cam mechanism, when bouncing back telescopic arm, drives minor details arm retraction by cam mechanism, can promote time minor details arm retraction after minor details arm retraction, by that analogy, until realizing each retraction saving arm except basic arm 3.Pass through cam mechanism, it is possible to achieve the telescopic arm smooth retraction in situation of not steeving.
It addition, by cam mechanism, can effectively overcome the frictional force effect between arm joint cylinder and the viscous effect of hydraulic oil in hydraulic system, can guarantee that stretching out arm joint is fully retracted into, good reliability, operating efficiency is high.In arm joint retraction operation process, retraction speed depends primarily on the actuating speed of cam mechanism, and arm joint retraction speed is uniform, and controlled.Owing to retraction speed is controlled, rear class arm joint arm tail will not be produced percussion by retraction arm joint, crane arm cylinder can be protected not suffer a loss, improve the security performance of equipment.
In the present embodiment, cam mechanism specifically adopts following implementation: referring to Fig. 4 a, and cam mechanism includes contracting arm elevator 18 and drive mechanism 2, and one end of drive mechanism 2 is connected with contracting arm elevator 18, and the other end of drive mechanism 2 is fixed on the final section of telescopic arm.
Referring to Fig. 4 a, drive mechanism 2 specifically includes assembly pulley 24 and contracting arm steel wire rope 21, and contracting arm steel wire rope 21 is at 24 wirings of assembly pulley.One end of contracting arm steel wire rope 21 is connected with contracting arm elevator 18, and the other end of contracting arm steel wire rope 21 is fixed on the final section of telescopic arm, and in the present embodiment, the other end of contracting arm steel wire rope 21 is fixed on seven joint arms 9.The contracting arm steel wire rope 21 of this telescoping mechanism may be provided in telescopic arm cylinder, but is not limited to this.
Referring to Fig. 5, contracting arm elevator 18 specifically can adopt split type difunctional elevator 1.Split type difunctional elevator 1 includes contracting arm elevator 18 and auxiliary work elevator 19, and both independently realize respective function.
Referring to Fig. 2, the telescopic arm structure that the present embodiment provides also includes exposure mechanism, exposure mechanism for control to remove first save telescopic arm except the stretching out of each telescopic arm.Pass through exposure mechanism, it is possible to make stretching out of each joint telescopic arm except first joint telescopic arm.
In the present embodiment, exposure mechanism includes multistage hydraulic cylinder 17 and controls valve group, the piston rod of multistage described hydraulic jack one end is fixed with first joint telescopic arm (basic arm 3), the final stage cylinder barrel of the other end is fixing with minor details telescopic arm (seven joint arms 9), and middle cylinder barrels at different levels are individually fixed in corresponding telescopic arm.Other telescopic arms except first joint telescopic arm (basic arm 3) all with control valve group and be connected, control valve group for control to remove first save telescopic arm except the stretching out sequentially of other telescopic arms.
Other telescopic arms that can realize except saving telescopic arm except head by controlling valve group stretch out according to the order set, so that the structural behaviour of telescopic arm obtains best performance.
Further, control valve group and include multiple sequence valve group 22, each sequence valve group 22 individually controls intermediate arm in minor details arm wherein one save stretch out pressure.Actual stretching out in process, stretch out after stretching out the big telescopic arm of pressure, the telescopic arm stretching out pressure little first stretches out, and stretches out the identical telescopic arm of pressure and synchronizes to stretch out.
Herein, the unlatching pressure of each sequence valve group 22 is different；Or the unlatching pressure of part order valve group 22 is identical.
Each joint telescopic arm except first joint arm is separately provided with sequence valve group 22, is easy to control the pressure that stretches out of each telescopic arm on the one hand, and the connected mode also making sequence valve group 22 on the other hand is simple.
Sequence valve group 22 specifically adopts following connected mode: sequence valve group 22 includes the sequence valve 25 and the check valve 26 that are connected in parallel, and the opening direction of sequence valve 25 and check valve 26 is contrary.Each check valve 26 is for realizing the order retraction of corresponding arm joint, and the unlatching pressure of each check valve 26 may be alternatively provided as identical or different.In actual retraction process, retraction after the big telescopic arm of pressure opened by check valve 26, and the telescopic arm opening pressure little first bounces back, and the telescopic arm that recoil pressure is identical synchronizes retraction.
A specific embodiment is described below.
The purpose of this utility model be to provide a kind of can control flexibly to stretch, the telescopic arm structure of simple in construction, dependable performance and the crane arm based on this telescopic arm structure.Telescopic arm structure includes basic arm 3 sheathed successively and multiple telescopic arm, adopts multistage hydraulic cylinder 17, controls valve group, contracting arm elevator 18, drive mechanism 2, it is achieved the order or optional flexible of single oil cylinder.
1, the composition of telescopic arm structure is there to be seven joint telescopic arms: as shown in Figure 2, and telescopic arm structure includes contracting arm elevator 18, contracting arm steel wire rope 21 and assembly pulley 24, basic arm 3, two joint arm 4, three joint arm 5, four joint arm 6, five joint arm 7, six joint arm 8, seven joint arm 9 and multistage hydraulic cylinder 17.Multistage hydraulic cylinder 17 includes piston rod 10, one-level cylinder tube 11, two-level oil cylinder's cylinder barrel 12, three grades of cylinder tubes 13, level Four cylinder tubes 14, Pyatyi cylinder tube 15 and six grades of hydraulic cylinders 16.Piston rod 10 is fixed with basic arm 3, and one-level cylinder tube 11 and two joint arms 4 are fixed, and by that analogy, six grades of hydraulic cylinders 16 and seven joint arms 9 are fixed.
2, telescopic arm structure operation principle: as shown in Figure 2, this telescopic arm structure bag expands exposure mechanism and cam mechanism.Exposure mechanism includes multistage hydraulic cylinder 17 and controls valve group, and basic arm 3 is fixed in one end of multistage hydraulic cylinder 17, and the other end is fixed on last arm joint of multistage telescopic arm, and middle cylinder barrels at different levels are individually fixed in corresponding telescopic arm.
Exposure mechanism is realized by multistage hydraulic cylinder 17, control valve group, as shown in accompanying drawing 3a and Fig. 3 b, by setting sequence valve 25 and the respective unlatching pressure of check valve 26 in each sequence valve group 22, pressure set points is opened when working oil in-cylinder pressure reaches sequence valve 25 in sequence valve group 22, opening sequence valve group 22, start respective stages oil cylinder extending action, the selection that can realize order or a certain arm joint that two joint arms 4, three save arm 5, four joint arm 6, five joint arm 7, six joint arm 8, seven joint arm 9 is stretched out, as shown in Figure 4.When working oil in-cylinder pressure reaches the unlatching pressure set points of check valve 26 in sequence valve group 22, opening sequence valve group 22, start respective stages oil cylinder retracting action, it may be achieved two joint arms 4, three joint arms 5, four joint arms 6, five joint arms 7, six save the selection of order or a certain arm joint that arm 8, seven saves arm 9 and bounce back.Illustrating wherein part order valve group 22 in Fig. 3 b, in each sequence valve group 22, the unlatching pressure of sequence valve 25 may be configured as and is gradually increased or reduces, and the unlatching pressure of each check valve 26 also may be configured as and is gradually increased or reduces, to meet the requirement stretched out and bounce back.
Cam mechanism is realized by contracting arm elevator 18 (the split type difunctional elevator 1 of concrete employing), contracting arm steel wire rope 21 and assembly pulley 24.Split type difunctional elevator 1 integrates crane arm retraction function and auxiliary work functions, as shown in Figure 5, during auxiliary work pattern, uses auxiliary work elevator 19 to carry out lift heavy operation by load cable 20；During crane arm retraction operation, switching to contracting arm elevator 18 by reversal valve group and mechanism, it may be achieved the retraction operation of telescopic arm, the full reduced state of crane arm and complete machine control schematic diagram such as shown in accompanying drawing 6, accompanying drawing 7.
The telescopic arm structure that this utility model embodiment provides realizes the order of each joint arm by multistage hydraulic cylinder 17, control valve group, split type difunctional elevator 1 and drive mechanism 2 or selects flexible, simple in construction, control flexibly, dependable performance, improve the combination property of crane arm.It addition, the telescopic arm structure that this utility model embodiment provides has an advantage that
1, the simple in construction of this telescopic arm structure, processing, assembly precision require low, stable performance, it is easy to manufacture and realize；Take less crane arm inner space, add the lap of splice of crane arm, decrease crane arm and respectively save the Sudden Changing Rate in cylinder cross section, improve rigidity and the stability of crane arm, thus improve the lifting performance of crane arm.
2, relative to existing Multi-stage cylinder telescopic boom, this crane arm stretches out the retraction operation of arm joint not by steeve angle and the working place limitation in height of crane arm, low-angle can be realized and negative angle state is stretched out and retraction operation, it is simple to crane arm be maintained and breakdown maintenance.
When 3, carrying out stretching out arm joint retraction operation, retraction speed uniformly and can be control effectively by arm joint retraction speed, it is to avoid in contracting arm process, the cylinder of rear class arm joint and arm tail is produced percussion, improves safety, and can guarantee that stretching out arm joint is fully retracted into, improve contracting arm efficiency.
The another embodiment of this utility model provides a kind of crane, including the telescopic arm structure that this utility model any technology scheme provides.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, it is only for ease of describing this utility model and simplifying description, rather than instruction or infer the device of indication or element must have specific orientation, for specific azimuth configuration and operation, thus it is not intended that restriction to this utility model protected content.
If being used herein the word such as " first ", " second " to limit parts, those skilled in the art should know: the use of " first ", " second " is intended merely to facilitate description this utility model and simplifies description, as additionally do not stated, above-mentioned word does not have special implication.
Last it is noted that above example is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although this utility model being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement, but these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of this utility model.
Claims (10)
1. the telescopic arm structure with cam mechanism, it is characterised in that include multi-stage telescopic arms and cam mechanism；Described multi-stage telescopic arms includes basic arm, intermediate arm and minor details arm, and described cam mechanism drives with described minor details arm and is connected, and described cam mechanism can pass through to drive described minor details arm to bounce back to drive described intermediate arm to bounce back relative to described telescopic arm basic arm.
2. telescopic arm structure according to claim 1, it is characterized in that, described cam mechanism includes contracting arm elevator (18) and drive mechanism (2), one end of described drive mechanism (2) is connected with described contracting arm elevator (18), and the other end of described drive mechanism (2) is connected with described minor details arm.
3. telescopic arm structure according to claim 2, it is characterized in that, described drive mechanism (2) includes contracting arm steel wire rope (21) and assembly pulley (24), one end of described contracting arm steel wire rope (21) is connected with described contracting arm elevator (18), the middle part of described contracting arm steel wire rope (21) is at each pulley room wiring of described assembly pulley (24), and the other end of described contracting arm steel wire rope (21) is connected with described minor details arm.
4., according to the arbitrary described telescopic arm structure of claim 1-3, it is characterised in that also include exposure mechanism, described exposure mechanism drives with described intermediate arm and described minor details arm and is connected, to drive described intermediate arm and described minor details arm to stretch out.
5. telescopic arm structure according to claim 4, it is characterized in that, described exposure mechanism includes multistage hydraulic cylinder (17) and controls valve group, the piston rod of described multistage hydraulic cylinder (17) and described basic arm are fixed, final stage cylinder barrel and described minor details arm are fixed, and middle cylinder barrels at different levels are fixed with described intermediate arm respectively；Described control valve group stretches out order for what control described intermediate arm and described minor details arm.
6. telescopic arm structure according to claim 5, it is characterized in that, described control valve group includes multiple sequence valve group (22), and each described sequence valve group (22) individually controls described intermediate arm and stretches out pressure to the wherein joint in described minor details arm.
7. telescopic arm structure according to claim 6, it is characterised in that the unlatching pressure of each described sequence valve group (22) is different；Or the unlatching pressure of part described sequence valve group (22) is identical.
8. telescopic arm structure according to claim 6, it is characterized in that, described sequence valve group (22) includes the sequence valve (25) and the check valve (26) that are connected in parallel, and the opening direction of described sequence valve (25) and described check valve (26) is contrary.
9. telescopic arm structure according to claim 2, it is characterised in that described contracting arm elevator (18) adopts split type difunctional elevator.
10. a crane, it is characterised in that include the arbitrary described telescopic arm structure of claim 1-9.
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| CN201521138249.5U CN205346686U (en) | 2015-12-31 | 2015-12-31 | Flexible arm structure and hoist with go back to mechanism of contracting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517006A (en) * | 2016-12-23 | 2017-03-22 | 徐州重型机械有限公司 | Winding auxiliary recycling suspension arm device and crane using same |
| CN109882080A (en) * | 2019-01-29 | 2019-06-14 | 青岛达邦钻机有限责任公司 | All-hydraulic rock-drilling jumbo down-the-hole drill boom realizes telescopic method |
-
2015
- 2015-12-31 CN CN201521138249.5U patent/CN205346686U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517006A (en) * | 2016-12-23 | 2017-03-22 | 徐州重型机械有限公司 | Winding auxiliary recycling suspension arm device and crane using same |
| CN106517006B (en) * | 2016-12-23 | 2018-03-16 | 徐州重型机械有限公司 | A kind of elevator auxiliary recovery Lifting device and the crane using the device |
| CN109882080A (en) * | 2019-01-29 | 2019-06-14 | 青岛达邦钻机有限责任公司 | All-hydraulic rock-drilling jumbo down-the-hole drill boom realizes telescopic method |
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