CN108275588A - A kind of supporting leg horizontal extension automatic regulating apparatus and crane - Google Patents
A kind of supporting leg horizontal extension automatic regulating apparatus and crane Download PDFInfo
- Publication number
- CN108275588A CN108275588A CN201711316212.0A CN201711316212A CN108275588A CN 108275588 A CN108275588 A CN 108275588A CN 201711316212 A CN201711316212 A CN 201711316212A CN 108275588 A CN108275588 A CN 108275588A
- Authority
- CN
- China
- Prior art keywords
- active box
- supporting leg
- horizontal extension
- regulating apparatus
- block
- 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.)
- Pending
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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
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
-
- 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
- B66C23/18—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 specially adapted for use in particular purposes
- B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention belongs to technical field of engineering machinery, provide a kind of supporting leg horizontal extension automatic regulating apparatus, including static housing, telescopic outrigger and cross cylinder, it further include automatic mechanism, automatic mechanism is equipped with two groups, and it is arranged respectively at the both sides up and down of active box, automatic mechanism on the upside of active box is installed on one end far from support leg on active box, automatic mechanism on the downside of active box is installed on one end close to support leg on static housing, and two groups of automatic mechanisms apply the reaction force of variation with the horizontal reciprocating movement of active box to active box always, reaction force is adapted with the gravity that telescopic outrigger and cross cylinder generate, to ensure active box level.The present invention realizes the adjust automatically during supporting leg horizontal extension, it can be ensured that supporting leg remains horizontal extension state, and then extends service life of the oil cylinder with leg structure part, and simple in structure, and manufacturing cost is low, remarkable in economical benefits.
Description
Technical field
The present invention relates to technical field of engineering machinery, and in particular to a kind of supporting leg horizontal extension automatic regulating apparatus and lifting
Machine.
Background technology
Crane refers to more action hoisting machineries of vertical-lift in a certain range and horizontal carrying heavy goods.With its people
The lasting progress and the outburst of Logistics Market of economic sustainable growth, infrastructure, crane in lifting, the necks such as safeguard, speedily carry out rescue work
The use in domain is more and more extensive, and supporting leg is construction machinery industry an indispensable part, is to realize that crane has at work
There is effective guarantee of the safe enough with stability.
During slowly stretching out, the weight of movable supporting legs and preceding Vertical Cylinders itself can produce the movable supporting legs of crane
A raw gravity vertically downward, due to during production technique supporting leg, in fact it could happen that tolerance is more than design size, in this way
It is heeling condition that will lead to supporting leg stretching, cross cylinder, Vertical Cylinders can be made to be chronically at heeling condition, to oil cylinder with supporting leg
Component damages, and then influences service life of the oil cylinder with supporting leg, to ensure that movable supporting legs remain in telescopic process
Horizontality, producer is mostly by the making precision of control structure part to reach protruding horizontally up for supporting leg in the prior art, but manufactures
Cost is higher, in addition, being the horizontality of landing leg stretching when ensuring crane work, the following adjustment mode of generally use：One is
Increase cushion block in its supporting leg babinet tail portion, but increased cushion block is non-adjustable, does not just have effect, another kind to be using a period of time
It is adjustable, but need it is artificial go to adjust, adjustment is very troublesome, and set-up procedure is cumbersome, will if user does not go artificially to adjust
There is oil cylinder damage or structural member damages.
Therefore, a kind of supporting leg horizontal extension automatic regulating apparatus and crane are developed, not only there is urgent researching value,
Also with good economic efficiency and commercial application potentiality, where this power that exactly present invention is accomplished and basis.
Invention content
In order to overcome the defect of the prior art as indicated above, the present inventor to have made intensive studies this, paying
After a large amount of creative works, so as to complete the present invention.
Specifically, the technical problem to be solved by the present invention is to：A kind of supporting leg horizontal extension automatic regulating apparatus is provided
And crane, to realize the adjust automatically during supporting leg horizontal extension, it is ensured that supporting leg remains horizontal extension state, in turn
Extend service life of the oil cylinder with leg structure part.
In order to solve the above technical problems, the technical scheme is that：
A kind of supporting leg horizontal extension automatic regulating apparatus, including
Static housing, the static housing to realize with crane frame connection installation；
Telescopic outrigger, the telescopic outrigger include active box and are fixedly installed in the support of described active box one end
Leg, the active box are movably installed in the fixed inside the box, Vertical Cylinders are equipped in the support leg；
Cross cylinder, the cross cylinder are installed on the fixed inside the box, to drive the active box in described
The horizontal reciprocating movement of fixed inside the box；
It is characterized in that：Further include
Automatic mechanism, the automatic mechanism are equipped with two groups, and automatic mechanism is respectively at described described in two groups
The both sides up and down of active box are arranged, and the automatic mechanism on the upside of the active box is installed on the active box
One end far from the support leg, the automatic mechanism on the downside of the active box are installed on the fixation on body
Close to one end of the support leg on babinet, and automatic mechanism described in two groups is with the horizontal reciprocating movement of the active box
Always the reaction force for giving the active box to apply variation, the reaction force are generated with the telescopic outrigger and cross cylinder
Gravity be adapted, to ensure that the active box is horizontal.
As an improvement technical solution, be located at the active box on the upside of the automatic mechanism include compression
Spring and slidable adjustment block offer to install the peace of the compressed spring and the slidable adjustment block on the active box
Tankage, in the mounting groove, the compressed spring holds the slidable adjustment block, and will for the slidable adjustment block activity
The inner wall of itself and the static housing contradicts.
As a kind of further improved technical solution, the mounting groove is located at the active box far from the support leg
The upper surface of one end open up.
As an improvement technical solution, be located at the active box on the downside of the automatic mechanism include compression
Spring and secured adjusted block offer to install the peace of the compressed spring and the secured adjusted block on the static housing
Tankage, in the mounting groove, the compressed spring holds the secured adjusted block, and will for the secured adjusted block activity
The outer wall of itself and the active box contradicts.
As a kind of further improved technical solution, the mounting groove is located at the static housing close to the support leg
The inner wall of one end open up, and be arranged positioned at the downside of the active box.
As an improvement technical solution, the mounting groove is falling with spring mountings and adjusting block mounting portion
" convex " type, and the opening of the mounting groove is arranged upward.
As an improvement technical solution, compressed spring adaptation is installed in the spring mountings, the work
Dynamic adjusting block and the corresponding adaptation of the secured adjusted block are installed in the adjusting block mounting portion.
As an improvement technical solution, it is convex to be equipped with a clamping on the activity adjustment block and the secured adjusted block
It rises, the one end of the compressed spring is sheathed in the clamping protrusion.
Further include that supporting leg horizontal extension described above is automatic the present invention discloses a kind of crane, including rack
Adjusting apparatus, the supporting leg horizontal extension automatic regulating apparatus are fixedly installed in by the static housing in the rack.
As a kind of perferred technical scheme, the crane is lorry-mounted crane.
Due to using the technology described above, the invention has the advantages that；
The telescopic outrigger of crane is generated one due to the weight of supporting leg and oil cylinder itself and hung down in reciprocal telescopic movement
Straight downward power, the present invention by equipped with two groups of automatic mechanisms, can with active box horizontal reciprocating movement always
Apply the reaction force of variation to active box, and the reaction force and telescopic outrigger and cross cylinder that apply are in reciprocal telescopic mistake
The gravity generated in journey is adapted, so that telescopic outrigger stress balance, reaches self-leveling effect, avoid telescopic outrigger
The generation of phenomenon is tilted down in reciprocal telescopic movement, it is ensured that telescopic outrigger is in always during reciprocal telescopic movement
Horizontality, and then cross cylinder and Vertical Cylinders and leg structure part are protected well, extend oil cylinder makes with supporting leg
With the service life, traditional supporting leg leveling mode is compared, the making precision of leg structure part is reduced, thereby reduces manufacturing cost,
The automation leveling for realizing supporting leg eliminates the troublesome operation manually adjusted, time saving and energy saving, and it is more humane to embody product
Design, and it is simple in structure, manufacturing cost is low, remarkable in economical benefits, has good practicability.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar reference numeral.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 2 is the enlarged structure schematic diagram of automatic mechanism in Fig. 1；
Reference numeral：1- static housings；2- telescopic outriggers；201- active boxes；202- support legs；3- cross cylinders；4-
Compressed spring；5- slidable adjustment blocks；501- clamps protrusion；6- secured adjusted blocks；7- mounting grooves；701- spring mountings；702-
Adjusting block mounting portion.
Specific implementation mode
The embodiment of technical solution of the present invention is described in detail below in conjunction with attached drawing.Following embodiment is only used for
Clearly illustrate technical scheme of the present invention, therefore be only used as example, and the protection model of the present invention cannot be limited with this
It encloses.
Embodiment one
As depicted in figs. 1 and 2, the present invention provides a kind of supporting leg horizontal extension automatic regulating apparatuses, including static housing
1, telescopic outrigger 2 and cross cylinder 3, static housing 1 include to realize the connection installation with crane frame, telescopic outrigger 2
Active box 201 and the support leg 202 for being fixedly installed in 201 one end of active box, active box 201 are movably installed in fixed case
In body 1, Vertical Cylinders are installed in support leg 202, cross cylinder 3 is installed in static housing 1, to drive active box
201 in the horizontal reciprocating movement in static housing 1.
Further include automatic mechanism, automatic mechanism is equipped with two groups, and two groups of automatic mechanisms are respectively at active box
The both sides up and down of body 201 are arranged, and the automatic mechanism positioned at 201 upside of active box is installed on separate on active box 201
One end of support leg 202, the automatic mechanism positioned at 201 downside of active box are installed on static housing 1 close to support leg
202 one end, and two groups of automatic mechanisms give active box 201 to apply always with the horizontal reciprocating movement of active box 201
The reaction force of variation, reaction force is adapted with the gravity that telescopic outrigger 2 and cross cylinder 3 generate, to ensure active box
201 is horizontal.
Automatic mechanism positioned at 201 upside of active box includes compressed spring 4 and slidable adjustment block 5, active box
Offer to install the mounting groove 7 of compressed spring 4 and slidable adjustment block 5 on 201, it is remote which is located at active box 201
The upper surface of one end from support leg 202 opens up, and for 5 activity of slidable adjustment block in mounting groove 7, compressed spring 4 holds cunning
Dynamic adjusting block 5, and the inner wall of itself and static housing 1 is contradicted, in 2 reciprocal telescopic movement of telescopic outrigger, by equipped with pressure
Contracting spring 4 and slidable adjustment block 5 can give the one end of active box 201 far from support leg 202 to apply a downward effect
Power.
Automatic mechanism positioned at 201 downside of active box includes compressed spring 4 and secured adjusted block 6, static housing 1
On offer to install the mounting groove 7 of compressed spring 4 and secured adjusted block 6, which is located at static housing 1 close to branch
The inner wall of one end of support leg 202 opens up, and is arranged positioned at the downside of active box 201, and 6 activity of secured adjusted block is flush-mounted in installation
In slot 7, compressed spring 4 holds secured adjusted block 6, and the outer wall of itself and active box 201 is contradicted, reciprocal in telescopic outrigger 2
When stretching motion, by equipped with compressed spring 4 and secured adjusted block 6, can give active box 201 close to support leg 202
One end applies a upward active force.
By equipped with two groups of automatic mechanisms, act on 201 both ends of active box, separately down with upward
Under the support of two active forces, the effect for offsetting telescopic outrigger 2 with oil cylinder gravity itself is generated, and pass through two groups of automatic adjusting machines
Structure is applied to the reaction force on active box 201, can be with the reciprocal telescopic real-time change of telescopic outrigger 2, to ensure to stretch
2 stress balance of supporting leg realizes the horizontal always of telescopic outrigger 2, and through constantly putting into practice, flexible branch is enabled to by the adjusting apparatus
Leg 2 during reciprocal telescopic its levelness within ± 1 degree.
For ease of realizing the installation of automatic mechanism, in the present embodiment, mounting groove 7 is with 701 He of spring mountings
" convex " type of adjusting block mounting portion 702, and the opening of mounting groove 7 is arranged upward, the adaptation of compressed spring 4 is installed on spring installation
In portion 701, activity adjustment block and the corresponding adaptation of secured adjusted block 6 are installed in adjusting block mounting portion 702, the peace offered
7 structure of tankage, convenient for the steady secured installation of compressed spring 4 and activity adjustment block, secured adjusted block 6, to be to realize certainly
Dynamic adjustment mechanism effective real-time monitoring accurate to telescopic outrigger 2 provides reliable guarantee.
In the present embodiment, it is equipped with a clamping protrusion 501 on activity adjustment block and secured adjusted block 6, the one of compressed spring 4
End sleeve, which is set to, to be clamped in protrusion 501, the clamping protrusion 501 that is equipped with realize activity adjustment block and secured adjusted block 6 respectively with
Effective connection of compressed spring 4, connection structure is simple and can ensure the secure and reliable connection in 2 telescopic process of telescopic outrigger.
To extend the service life of activity adjustment block and secured adjusted block 6, in the present embodiment, activity adjustment block and fixed adjust
Stainless steel or nylon wear-resistant slide block can be selected in locking nub 6, and coats wear-resisting painting in the upper surface of activity adjustment block and secured adjusted block 6
Commercially available such as abrasion-proof ceramic coat or tungsten carbide coating can be selected in layer, wear-resistant coating, certainly, for realization activity adjustment block, admittedly
The effective protection on 201 surface of locking nub of setting the tone 6 and the static housing 1 being in contact with the two and active box, while reducing sliding
Frictional force adds between activity adjustment block and 1 surface of static housing and secured adjusted block 6 and the contact surface of active box 201
Added with lubricant, and the upper surface of activity adjustment block and secured adjusted block 6 offers to store the spaced trenches of lubricant.
The supporting leg horizontal extension automatic regulating apparatus based on above structure, by equipped with two groups of automatic mechanisms,
The reaction force that active box 201 applies variation can be given always with the horizontal reciprocating movement of active box 201, and apply anti-
Active force is adapted with the gravity that telescopic outrigger 2 and cross cylinder 3 generate during reciprocal telescopic, so that telescopic outrigger
2 stress balances reach self-leveling effect, and telescopic outrigger 2 is avoided to tilt down the generation of phenomenon in reciprocal telescopic movement,
Telescopic outrigger 2 is ensured during reciprocal telescopic movement, is in horizontality always, and then protect cross cylinder 3 well
With Vertical Cylinders and leg structure part, service life of the oil cylinder with supporting leg is extended, compares traditional supporting leg leveling mode, is reduced
The making precision of leg structure part, thereby reduces manufacturing cost, realizes the automation leveling of supporting leg, eliminate artificial tune
Whole troublesome operation, it is time saving and energy saving, the more humane design of product is embodied, and simple in structure, manufacturing cost is low, economic benefit
Significantly, there is good practicability.
Embodiment two
Present embodiments provide a kind of crane, including rack, further include supporting leg horizontal extension described in embodiment one from
Dynamic adjusting apparatus, supporting leg horizontal extension automatic regulating apparatus are fixedly installed in by static housing 1 in rack, so that this
Heavy-duty machine can remain supporting leg level, it is ensured that oil cylinder and leg structure part are without damage, use the longevity when landing leg stretching is reciprocal
Life greatly prolongs.
In the present embodiment, crane is preferably lorry-mounted crane, and due to the structure and working principle of crane, supporting leg in
Mounting structure in rack is identical as existing commercial product, is known together by those skilled in the art, therefore not gone to live in the household of one's in-laws on getting married herein
It states.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover in the claim of the present invention and the range of specification.
Claims (10)
1. a kind of supporting leg horizontal extension automatic regulating apparatus, including
Static housing, the static housing to realize with crane frame connection installation；
Telescopic outrigger, the telescopic outrigger include active box and are fixedly installed in the support leg of described active box one end, institute
It states active box and is movably installed in the fixed inside the box, Vertical Cylinders are installed in the support leg；
Cross cylinder, the cross cylinder are installed on the fixed inside the box, to drive the active box in the fixation
Horizontal reciprocating movement in babinet；
It is characterized in that：Further include
Automatic mechanism, the automatic mechanism are equipped with two groups, and automatic mechanism is respectively at the activity described in two groups
The both sides up and down of babinet are arranged, and the automatic mechanism on the upside of the active box is installed on the active box
One end far from the support leg, the automatic mechanism on the downside of the active box are installed on the static housing
It is upper close to one end of the support leg, and automatic mechanism described in two groups with the active box horizontal reciprocating movement always
Apply the reaction force of variation, the weight that the reaction force is generated with the telescopic outrigger and cross cylinder to the active box
Power is adapted, to ensure that the active box is horizontal.
2. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 1, it is characterised in that：Positioned at the activity
The automatic mechanism on the upside of babinet includes compressed spring and slidable adjustment block, offers to pacify on the active box
The mounting groove of the compressed spring and the slidable adjustment block is filled, the slidable adjustment block activity is flush-mounted in the mounting groove,
The compressed spring holds the slidable adjustment block, and the inner wall of itself and the static housing is contradicted.
3. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 2, it is characterised in that：The mounting groove position
It is opened up in the upper surface of the one end of the active box far from the support leg.
4. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 2, it is characterised in that：Positioned at the activity
The automatic mechanism on the downside of babinet includes compressed spring and secured adjusted block, offers to pacify on the static housing
The mounting groove of the compressed spring and the secured adjusted block is filled, the secured adjusted block activity is flush-mounted in the mounting groove,
The compressed spring holds the secured adjusted block, and the outer wall of itself and the active box is contradicted.
5. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 4, it is characterised in that：The mounting groove position
It opens up in inner wall of the static housing close to one end of the support leg, and is arranged positioned at the downside of the active box.
6. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 4, it is characterised in that：The mounting groove is
" convex " type with spring mountings and adjusting block mounting portion, and the opening of the mounting groove is arranged upward.
7. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 6, it is characterised in that：The compressed spring
Adaptation is installed in the spring mountings, and the corresponding adaptation of the activity adjustment block and the secured adjusted block is installed on described
In adjusting block mounting portion.
8. a kind of supporting leg horizontal extension automatic regulating apparatus according to claim 7, it is characterised in that：The activity adjustment
Clamping protrusion is equipped on block and the secured adjusted block, the one end of the compressed spring is sheathed on the clamping protrusion
On.
9. a kind of crane, including rack, it is characterised in that：Further include that claim 1-8 any one of them supporting leg levels are stretched
Contracting automatic regulating apparatus, the supporting leg horizontal extension automatic regulating apparatus are fixedly installed in the rack by the static housing
On.
10. a kind of crane according to claim 9, it is characterised in that：The crane is lorry-mounted crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316212.0A CN108275588A (en) | 2017-12-12 | 2017-12-12 | A kind of supporting leg horizontal extension automatic regulating apparatus and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316212.0A CN108275588A (en) | 2017-12-12 | 2017-12-12 | A kind of supporting leg horizontal extension automatic regulating apparatus and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108275588A true CN108275588A (en) | 2018-07-13 |
Family
ID=62801455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711316212.0A Pending CN108275588A (en) | 2017-12-12 | 2017-12-12 | A kind of supporting leg horizontal extension automatic regulating apparatus and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108275588A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201087089Y (en) * | 2007-09-20 | 2008-07-16 | 徐州重型机械有限公司 | Crane supporting leg device with negative incidence structure |
| CN201301184Y (en) * | 2008-11-04 | 2009-09-02 | 徐州重型机械有限公司 | Adjustable guide centralizing device of moveable supporting leg of hoister |
| CN201619971U (en) * | 2010-03-17 | 2010-11-03 | 徐州彭城重型机械有限公司 | Barrel slide block of crane telescopic boom |
| CN202272624U (en) * | 2011-09-22 | 2012-06-13 | 常德大汉专用汽车有限公司 | Adjusting device for sliding block on support leg |
| CN202279644U (en) * | 2011-09-25 | 2012-06-20 | 三一汽车起重机械有限公司 | Sectional jib overlapping device of crane jib and crane jib |
| CN202508797U (en) * | 2012-03-21 | 2012-10-31 | 韶关市曲江区明和设备修造有限公司 | Automatic compensation slide block structure for wheel mounted crane |
| CN203428818U (en) * | 2013-08-23 | 2014-02-12 | 徐州重型机械有限公司 | Movable leg adjustment device and wheel crane |
| CN203461735U (en) * | 2013-08-01 | 2014-03-05 | 辽宁瑞丰专用车制造有限公司 | Supporting-leg leveling device |
-
2017
- 2017-12-12 CN CN201711316212.0A patent/CN108275588A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201087089Y (en) * | 2007-09-20 | 2008-07-16 | 徐州重型机械有限公司 | Crane supporting leg device with negative incidence structure |
| CN201301184Y (en) * | 2008-11-04 | 2009-09-02 | 徐州重型机械有限公司 | Adjustable guide centralizing device of moveable supporting leg of hoister |
| CN201619971U (en) * | 2010-03-17 | 2010-11-03 | 徐州彭城重型机械有限公司 | Barrel slide block of crane telescopic boom |
| CN202272624U (en) * | 2011-09-22 | 2012-06-13 | 常德大汉专用汽车有限公司 | Adjusting device for sliding block on support leg |
| CN202279644U (en) * | 2011-09-25 | 2012-06-20 | 三一汽车起重机械有限公司 | Sectional jib overlapping device of crane jib and crane jib |
| CN202508797U (en) * | 2012-03-21 | 2012-10-31 | 韶关市曲江区明和设备修造有限公司 | Automatic compensation slide block structure for wheel mounted crane |
| CN203461735U (en) * | 2013-08-01 | 2014-03-05 | 辽宁瑞丰专用车制造有限公司 | Supporting-leg leveling device |
| CN203428818U (en) * | 2013-08-23 | 2014-02-12 | 徐州重型机械有限公司 | Movable leg adjustment device and wheel crane |
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Application publication date: 20180713 |