CN104986674B - Telescopic arm structure, suspension arm structure and crane - Google Patents
Telescopic arm structure, suspension arm structure and crane Download PDFInfo
- Publication number
- CN104986674B CN104986674B CN201510465223.XA CN201510465223A CN104986674B CN 104986674 B CN104986674 B CN 104986674B CN 201510465223 A CN201510465223 A CN 201510465223A CN 104986674 B CN104986674 B CN 104986674B
- Authority
- CN
- China
- Prior art keywords
- locating part
- arm
- joint
- telescopic arm
- support member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a telescopic arm structure, a suspension arm structure and a crane, and relates to the field of engineering machines. The telescopic arm structure is used for improving the alignment accuracy of a pin hole in a first knuckle arm and a pin hole in a second knuckle arm and comprises the first knuckle arm and the second knuckle arm. The telescopic arm structure further comprises a first limiting piece and a second limiting piece. The first limiting piece and the first knuckle arm are fixedly connected. The second limiting piece and the second knuckle arm are fixedly connected. The second knuckle arm moves to the stretching-out position relative to the first knuckle arm. The first limiting piece and the second limiting piece make surface-to-surface contact so as to restrain the second knuckle arm from continuing stretching out. According to the technical scheme, the first limiting piece and the second limiting piece are added, the second knuckle arm is limited by the adoption of surface-to-surface contact, the contact area between the first limiting piece and the second limiting piece is large, the probability that the first limiting piece deforms can be decreased, the limiting collision stress state of the second knuckle arm is improved, and deformation is decreased, so that limiting is more accurate.
Description
Technical field
The present invention relates to engineering machinery field is and in particular to a kind of telescopic arm structure, boom structure and crane.
Background technology
Abdomen puts formula auxiliary as wheeled crane important feature part, can be arranged on principal arm arm head, to expand crane work
Industry space.Abdomen is put formula auxiliary and is possessed the narrow working space of adaptation, using advantage simple to operate.
Crane: a kind of equipment for raising weight, it is arranged on mobile platform.
Auxiliary: a kind of structure being arranged on principal arm arm head, for lift crane working space.
Abdomen puts formula auxiliary: is articulated in the auxiliary below principal arm back segment during a kind of non-operation, during use from edge below principal arm
Heavy-duty machine luffing Plane Rotation carries out lifting operation to principal arm arm head.
Referring to Fig. 1 and Fig. 2, abdomen is put formula auxiliary and is made up of two section box-shaped arms, and specially one section auxiliary 102 and two saves auxiliarys
103.When user uses two section auxiliary 103 operations, need for two section auxiliarys 103 to be pulled out to limit position along a section auxiliary 102
Put, so that the pin-and-hole alignment on a section auxiliary 102 and two section auxiliarys 103, be then inserted into a section auxiliary 102 by connecting bearing pin
In the pin shaft hole on two section auxiliarys 103, realize the fixation of two section auxiliarys 103.In practical application, abdomen is put and is provided with formula auxiliary
Position-limit mechanism, so that two section auxiliarys 103 can relatively accurately be drawn out to the extreme position of setting.Abdomen is put formula auxiliary and is articulated in
Below principal arm 104 back segment.
The two section spacing employing following manner of auxiliary 103 in prior art: as shown in Figure 3 and Figure 4, save auxiliary two
Weld collision block 100 above 103 cylinder, at a section auxiliary 102 end face postive stop baffle 105, design spacing regulating bolt 101.When
Two section auxiliarys 103 fast close to extreme position when, spacing regulating bolt 101 is clashed into by collision block 100 two section auxiliarys 103 is limited
Position.
Inventor finds, at least there are following problems: in prior art, two section auxiliarys 103 employings is spacing in prior art
Two section auxiliarys 103 are pulled out by inertia, during pull-out, impulsive force is larger by mode by manpower.When two section auxiliarys 103 are drawn out
To close to extreme position when, collision block 100 clashes into spacing regulating bolt 101, because impulsive force is larger and collision block 100 and spacing tune
The collision area of section bolt 101 is little, the postive stop baffle 105 arranging spacing regulating bolt 101 can be made to deform larger, sometimes even
Cause postive stop baffle 105 to damage impact to use；Simultaneously because postive stop baffle 105 there is larger collision deformation so that a section is secondary
Pin shaft hole centering on arm 102 and two section auxiliarys 103 is inaccurate, causes to connect bearing pin plug difficulty.
Content of the invention
One of purpose of the present invention is to propose a kind of telescopic arm structure, boom structure and crane, in order to improve one
The accuracy of pin-and-hole centering in joint arm and two joint arms.
For achieving the above object, the invention provides technical scheme below:
The invention provides a kind of telescopic arm structure, including a joint arm and two joint arms, wherein, described telescopic arm structure also wraps
Include the first locating part and the second locating part；Described first locating part is fixedly linked with a described joint arm, described second locating part with
Described two joint arms are fixedly linked；
Wherein, when described two joint arms with respect to a described joint arm movement to extended position, described first locating part and described
Second locating part plane-plane contact continues to stretch out to limit described two joint arms.
Telescopic arm structure as above is it is preferred that described first locating part includes being fixedly linked with a described joint arm
The first collision block, described second locating part include with described two joint arms welding the second collision block.
Telescopic arm structure as above is it is preferred that described first locating part also includes support member and spacer, described
Support member is detachably connected with a described joint arm, and described first collision block and described support member are detachably connected；
Described spacer is folded between described support member and described first collision block, for adjusting described first collision block in institute
State the position on a joint arm length direction.
Telescopic arm structure as above is it is preferred that described first locating part also includes adjusting slide block and adjusting pad；
Described adjustment slide block is detachably connected with described support member, and described adjusting pad is folded in described support member and described tune
Between whole slide block, for adjusting the lateral clearance between a described joint arm and described two joint arms.
Telescopic arm structure as above it is preferred that offering countersunk on described first collision block, described spacer and
Screw is all accordingly offered on described support member, bolt passes through described countersunk and described screw by described support member, described tune
Section pad and described first collision block are fixed.
It is preferred that described telescopic arm structure puts formula auxiliary for abdomen, a described joint arm is telescopic arm structure as above
One section auxiliary, described two joint arms are two section auxiliarys.
Telescopic arm structure as above is it is preferred that described first locating part is close to the baffle plate of a described joint arm arm head
Setting.
Telescopic arm structure as above it is preferred that the quantity of described first locating part and described second locating part all
For two sets, two sets of described first locating parts and described second locating part are symmetrical arranged with the longitudinal center line of a described joint arm.
The present invention also provides a kind of boom structure, and it includes the telescopic arm structure that the arbitrary technical scheme of the present invention is provided.
The present invention provides a kind of crane again, and it includes the boom structure that the arbitrary technical scheme of the present invention is provided.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
Technique scheme, is additionally arranged the first locating part and the second locating part, and is realized to two joint arms using plane-plane contact
Spacing, the first locating part and the second locating part contact area big, it is possible to reduce first locating part occur deformation possibility, improve
Two joint arms spacing collision stresses, reduce the probability of part distortion in a joint arm so that spacing more accurate, from
And ensure that the accuracy of follow-up pin-and-hole centering；Also extend the service life of telescopic arm structure simultaneously.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 puts a section in running order schematic diagram of auxiliary of formula auxiliary for prior art midfield；
Fig. 2 puts the two section in running order schematic diagrams of auxiliary of formula auxiliary for prior art midfield；
Fig. 3 puts the two section spacing principle schematic of auxiliary one of formula auxiliary for prior art midfield；
Fig. 4 puts the two section spacing principle schematic of auxiliary two of formula auxiliary for prior art midfield；
Fig. 5 is the partial structural diagram of telescopic arm structure provided in an embodiment of the present invention；
Fig. 6 is the perspective view of the first locating part in telescopic arm structure provided in an embodiment of the present invention；
Fig. 7 is the stereochemical structure decomposing schematic representation of the first locating part in telescopic arm structure provided in an embodiment of the present invention；
Fig. 8 is the sectional structure decomposing schematic representation of the first locating part in telescopic arm structure provided in an embodiment of the present invention；
Fig. 9 is that in telescopic arm structure provided in an embodiment of the present invention, two joint arm lateral clearances adjust process schematic；
Figure 10 is that in telescopic arm structure provided in an embodiment of the present invention, two joint arm lateral clearances adjust end-state schematic diagram；
Figure 11 is that in telescopic arm structure provided in an embodiment of the present invention, two joint arm axial clearances adjust process schematic；
Figure 12 is that in telescopic arm structure provided in an embodiment of the present invention, two joint arm axial clearances adjust end-state schematic diagram.
Specific embodiment
Illustrated in more detail with reference to the technical scheme that Fig. 5～Figure 12 provides to the present invention.
Referring to Fig. 5 to Fig. 8, the embodiment of the present invention provides a kind of telescopic arm structure, including a joint arm 1, two joint arms 2, first
Locating part 3 and the second locating part 4.First locating part 3 is fixedly linked with a joint arm 1, the second locating part 4 and two joint arm 2 fixing phase
Even.Wherein, when two joint arms 2 mobile with respect to a joint arm 1 to extended position, the first locating part 3 and the second locating part 4 plane-plane contact
Continue to stretch out to limit two joint arms 2.
When needing using two joint arms 2, two joint arms 2 need to be stretched out, two joint arms 2 are stretched out after putting in place, by a joint arm 1 and two sections
Pin shaft hole centering on arm 2, is then fixedly connected by bearing pin.First locating part 3 and the second locating part 4 are used for limiting two joint arms
2 extended position.
Above-mentioned telescopic arm structure to be applied as a example abdomen is put on formula auxiliary, technique scheme, it is additionally arranged first spacing
Part 3 and the second locating part 4, and realized spacing to two joint arms 2 using plane-plane contact, the first locating part 3 and the second locating part 4 connect
Contacting surface is amassed big, it is possible to reduce the possibility of deformation in the first locating part 3, improves the spacing collision stress of two joint arm 2, reduces
The probability of the part distortion in one joint arm 1 so that spacing more accurate, also extends the use longevity of telescopic arm structure simultaneously
Life.
Referring to Fig. 5, Fig. 7 and Figure 11, the first locating part 3 includes the first collision block 31 being fixedly linked with a joint arm 1, the second limit
Position part 4 includes the second collision block 41 with two joint arm 2 welding.First collision block 31 and the second collision block 41 are respectively provided with mutual making contact
Plane.
First collision block 31, the face of the second collision block 41 mutually collision all can arrange as far as possible larger, to reduce by two joint arms 2
The damage to the first collision block 31, the second collision block 41 is impacted during stretching out.
The present invention passes through lateral welded limiting the second collision block 41 in the middle part of two section auxiliarys, laterally fills in the middle part of a section auxiliary
Join the first collision block 31, improve spacing collision stress, preferably alleviate structural impact deformation, improve the reliability of product
Property.
Referring to Fig. 5 to Fig. 8, further, the first locating part 3 also includes support member 32 and spacer 33, support member 32 with
One joint arm 1 is detachably connected, and the first collision block 31 and support member 32 are detachably connected.Spacer 33 is folded in support member 32 and first
Between collision block 31, for adjusting position on a joint arm 1 length direction for first collision block 31.
Spacer 33 can arrange quantity according to actual needs.Support member 32 may include backing plate 38 and cushion block 39, Liang Zheke
Bolt connection or be integral type structure.
Technique scheme, has longitudinally adjust function, can be by increasing or decreasing the quantity of longitudinally adjust pad 33, side
Just two joint arm longitudinal spacing positions are adjusted it is achieved that the precise control spacing to two joint arms is so that one or two joint arm bearing pins connect
Centering effect in hole is preferable, thus improving the convenience of bearing pin plug.
Referring to Fig. 8, the first collision block 31 offers countersunk 36, spacer 33 and support member 32 all accordingly offer spiral shell
Screw is accordingly offered on the cushion block 39 in hole, specially support member 32.Bolt 37 pass through countersunk 36 and screw by support member 32,
Spacer 33 and the first collision block 31 are fixing.
Open up countersunk 36 on first collision block 31, bolt 37 head can be embedded in countersunk 36, to prevent first to hit
When block 31, the second collision block 41 mutually collide, the second collision block 41 and bolt 37 head impact.
Referring to Fig. 8, further, the first locating part 3 also includes adjusting slide block 34 and adjusting pad 35.Adjust slide block 34 and prop up
Support member 32 is detachably connected, and adjusting pad 35 is folded between support member 32 and adjustment slide block 34, and adjusting pad 35 is used for adjusting a section
Lateral clearance between arm 1 and two joint arms 2.Adjusting pad 35 can also arrange quantity according to actual needs.
Technique scheme, can be by increasing or decreasing lateral adjusting pad 35, and easily adjustment one, two section auxiliary is horizontal
To gap it is achieved that the reasonable control to one, two arm lateral clearances according to practical set situation.
Hold above-mentioned, telescopic arm structure can put formula auxiliary for abdomen, and a joint arm 1 is a section auxiliary, and two joint arms 2 are two section auxiliarys.
Referring to Fig. 9, further, the first locating part 3 is close to the baffle plate setting of a joint arm 1 arm head.In the first collision block 31 He
When second collision block 41 clashes into, impact force can be transmitted to the baffle plate of a joint arm 1 arm head, to prevent the first locating part 3 from bearing excessive hitting
Hit power.
In the present embodiment, the quantity of the first locating part 3 and the second locating part 4 is all two sets, two set of first locating part 3 and
Two locating parts 4 are symmetrical arranged with the centrage of a joint arm 1.
As shown in figure 5, the embodiment of the present invention provides a kind of abdomen of novel limiting mechanism to put formula auxiliary.
This abdomen is put this device of formula auxiliary and is saved auxiliary cylinder two middle side part welded limiting the second collision block 41 two, secondary in a section
Assembling the first locating part 3 in outside in the middle part of arm.
As Fig. 6, shown in Fig. 7, Fig. 8, the first locating part 3, mainly by backing plate 38, the first collision block 31, cushion block 39, adjusts slide block
34th, spacer 33, bolt 37, packing ring 6, screw, adjusting pad 35 and nut are assembled into, and are capable of two auxiliary lateral clearances and adjust
And two section auxiliary longitudinal spacing function.
When two section auxiliarys pulled into approximated position, by the first collision block 31 and two in the regulating block on a section auxiliary
The second collision block 41 on section auxiliary cylinder collides spacing, and the adjustment slide block 34 in the first locating part 3 can be realized to two sections simultaneously
The lateral adjustment function of auxiliary, realizes the reasonable control to a section auxiliary, two section auxiliary sideshakes.
As shown in Figure 9, Figure 10, when realizing adjusting a section auxiliary, two section auxiliary lateral clearances, can lead to and increase or decrease tune
Whole pad 35 come to ensure a section auxiliary, two section reasonable clearances in practical set for the auxiliary.As Figure 11, shown in Figure 12, realizing two
During section auxiliary longitudinal spacing, adjust the first collision block 31 position by spacer 33, realize the longitudinal spacing to two section auxiliarys, make
Bearing pin connecting hole above it reaches design attitude, thus ensureing that one or two section auxiliarys connect bearing pin and facilitate plug.Due to this first
Lateral adjustment and longitudinally adjusted function are gathered together by locating part 3, easy to adjust it is achieved that one or two section auxiliary structure designs
Simplify, thus alleviating stress concentration, the reliability improving product makes regulation simple operation efficient simultaneously.
The embodiment of the present invention also provides a kind of boom structure, and it includes the telescopic arm knot of the present invention arbitrary technical scheme offer
Structure.
The embodiment of the present invention reoffers a kind of crane, and it includes the boom structure of the present invention arbitrary technical scheme offer.
This crane is specifically as follows wheeled crane.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", "front", "rear",
The orientation of instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are based on accompanying drawing institute
The orientation showing or position relationship, are only for ease of the description present invention and to simplify description, rather than instruction or the device inferring indication
Or element must have specific orientation, be specific azimuth configuration and operation, thus it is not intended that protect interior to the present invention
The restriction held.
If the word such as " first ", " second " being used herein and to limit parts, those skilled in the art should
This knows: " first ", the use of " second " are intended merely to facilitate the description present invention and simplify description, such as in addition do not state,
Above-mentioned word does not have special implication.
Finally it should be noted that: above example is only not intended to limit in order to technical scheme to be described；To the greatest extent
Pipe has been described in detail to the present invention with reference to preferred embodiment, and those of ordinary skill in the art are it is understood that still
The specific embodiment of the present invention can be modified or equivalent is carried out to some technical characteristics；Without deviating from this
The spirit of bright technical scheme, it all should be covered in the middle of the technical scheme scope that the present invention is claimed.
Claims (8)
1. a kind of telescopic arm structure, including a joint arm (1) and two joint arms (2) it is characterised in that described telescopic arm structure also includes
First locating part (3) and the second locating part (4)；Described first locating part (3) is fixedly linked with a described joint arm (1), and described
Two locating parts (4) are fixedly linked with described two joint arms (2)；
Wherein, when described two joint arms (2) mobile with respect to a described joint arm (1) to extended position, described first locating part (3) and
Described second locating part (4) plane-plane contact continues to stretch out to limit described two joint arms (2)；
Described first locating part (3) includes the first collision block (31) being fixedly linked with a described joint arm (1), described second locating part
(4) include the second collision block (41) welding with described two joint arms (2)；
Described first locating part (3) also includes support member (32) and spacer (33), described support member (32) and a described joint arm
(1) it is detachably connected, described first collision block (31) and described support member (32) are detachably connected；
Described spacer (33) is folded between described support member (32) and described first collision block (31), for adjusting described first
Position on a described joint arm (1) length direction for the collision block (31).
2. telescopic arm structure according to claim 1 is it is characterised in that described first locating part (3) also includes adjustment cunning
Block (34) and adjusting pad (35)；
Described adjustment slide block (34) is detachably connected with described support member (32), and described adjusting pad (35) is folded in described support member
(32) and described adjustment slide block (34) between, for adjust between a described joint arm (1) and described two joint arms (2) horizontal between
Gap.
3. telescopic arm structure according to claim 1 is it is characterised in that offer countersunk on described first collision block (31)
(36), described spacer (33) and described support member (32) all accordingly offer screw, bolt (37) passes through described countersunk
(36) with described screw, described support member (32), described spacer (33) and described first collision block (31) are fixed.
4. according to the arbitrary described telescopic arm structure of claim 1-3 it is characterised in that described telescopic arm structure puts formula pair for abdomen
Arm, a described joint arm (1) is a section auxiliary, and described two joint arms (2) are two section auxiliarys.
5. telescopic arm structure according to claim 4 is it is characterised in that described first locating part (3) is close to a described section
The baffle plate setting of arm (1) arm head.
6. according to the arbitrary described telescopic arm structure of claim 1-3 it is characterised in that described first locating part (3) and described
The quantity of the second locating part (4) is all two sets, and two sets of described first locating parts (3) and described second locating part (4) are with described one
The longitudinal center line of joint arm (1) is symmetrical arranged.
7. a kind of boom structure is it is characterised in that include the arbitrary described telescopic arm structure of claim 1-6.
8. a kind of crane is it is characterised in that include the boom structure described in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465223.XA CN104986674B (en) | 2015-07-31 | 2015-07-31 | Telescopic arm structure, suspension arm structure and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465223.XA CN104986674B (en) | 2015-07-31 | 2015-07-31 | Telescopic arm structure, suspension arm structure and crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104986674A CN104986674A (en) | 2015-10-21 |
| CN104986674B true CN104986674B (en) | 2017-01-25 |
Family
ID=54298605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510465223.XA Active CN104986674B (en) | 2015-07-31 | 2015-07-31 | Telescopic arm structure, suspension arm structure and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104986674B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847245A (en) * | 2019-03-27 | 2019-06-07 | 四川川消消防车辆制造有限公司 | A kind of adjustable telescopic arm component and installation method |
| CN113582050B (en) * | 2021-07-30 | 2023-08-29 | 三一汽车起重机械有限公司 | Side bending correction device and method for crane boom and crane |
| CN113734997B (en) * | 2021-08-16 | 2023-08-08 | 三一汽车起重机械有限公司 | Correcting device for side bending of telescopic boom and crane |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1706956A1 (en) * | 1989-04-11 | 1992-01-23 | Саратовский политехнический институт | Telescopic boom of load-hoisting device |
| CN102398864A (en) * | 2011-07-12 | 2012-04-04 | 长沙中联重工科技发展股份有限公司 | Telescopic mechanism, engineering machinery and fire-fighting machinery |
| CN202193135U (en) * | 2011-08-23 | 2012-04-18 | 三一重机有限公司 | Crawler-type chassis telescopic mechanism and crawler-type piling machine |
| CN203048456U (en) * | 2012-12-31 | 2013-07-10 | 中联重科股份有限公司 | Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system, and crane |
| CN203461737U (en) * | 2013-08-01 | 2014-03-05 | 辽宁瑞丰专用车制造有限公司 | Telescopic device of two-stage movable supporting legs |
| EP2464592B1 (en) * | 2009-11-30 | 2014-05-07 | Cargotec Patenter AB | Telescopic device comprising a sliding element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007326680A (en) * | 2006-06-08 | 2007-12-20 | Aichi Corp | Telescoping device |
-
2015
- 2015-07-31 CN CN201510465223.XA patent/CN104986674B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1706956A1 (en) * | 1989-04-11 | 1992-01-23 | Саратовский политехнический институт | Telescopic boom of load-hoisting device |
| EP2464592B1 (en) * | 2009-11-30 | 2014-05-07 | Cargotec Patenter AB | Telescopic device comprising a sliding element |
| CN102398864A (en) * | 2011-07-12 | 2012-04-04 | 长沙中联重工科技发展股份有限公司 | Telescopic mechanism, engineering machinery and fire-fighting machinery |
| CN202193135U (en) * | 2011-08-23 | 2012-04-18 | 三一重机有限公司 | Crawler-type chassis telescopic mechanism and crawler-type piling machine |
| CN203048456U (en) * | 2012-12-31 | 2013-07-10 | 中联重科股份有限公司 | Telescopic boom system, limiting structure of telescopic oil cylinder of telescopic boom system, and crane |
| CN203461737U (en) * | 2013-08-01 | 2014-03-05 | 辽宁瑞丰专用车制造有限公司 | Telescopic device of two-stage movable supporting legs |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104986674A (en) | 2015-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104986674B (en) | Telescopic arm structure, suspension arm structure and crane | |
| US20120210815A1 (en) | Apparatus For Moving A Platform | |
| JP2014181094A (en) | Jib | |
| CN208747582U (en) | A kind of straight-arm aerial work platform | |
| CN202831645U (en) | Concrete distributing rod | |
| US10675204B2 (en) | Powered exoskeleton and stabilizing structure thereof | |
| JP2014065573A (en) | Lower gib | |
| CN205764512U (en) | Cone cylinder welding tooling | |
| CN201882815U (en) | Elevator boom and self disassembling and assembling device thereof | |
| CN109914852A (en) | A kind of Construction of Civil Engineering supporting construction | |
| KR102093307B1 (en) | Knee joint of wearable robot | |
| CN203474330U (en) | Variable-amplitude pulley wheel assembly and tower crane provided with variable-amplitude pulley wheel assembly | |
| CN102852175A (en) | Extensible arm component and deep excavator | |
| CN209553350U (en) | Robot and its leg structure | |
| CN204267507U (en) | A kind of bent axle of diesel engine | |
| CN103470048B (en) | Jib lubbing mechanism and engineering machinery for engineering machinery | |
| CN207766813U (en) | Leveling paddy field machine | |
| CN204490378U (en) | A kind of crane support and hoisting crane | |
| CN208719238U (en) | A kind of novel hydraulic damper | |
| CN203602262U (en) | Supporting-leg installation guiding device and chassis structure of wheeled crane | |
| CN205190414U (en) | Flexible link mechanism who possesses self -locking function | |
| CN207787604U (en) | A kind of rail mounted forging discharging machine | |
| CN208977845U (en) | A kind of foldable robotic arm steelframe | |
| CN208630735U (en) | A kind of hydraulic crawler excavator tensioning device | |
| CN215369840U (en) | Rear stable tail swinging mechanism of heading machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 221000 68 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: No. 165, Tongshan Road, Xuzhou, Jiangsu Province Patentee before: Xuzhou Heavy Machinery Co., Ltd. |