CN109879183A - Positioning method, positioning device and positioning kit for knuckle arm tail sliding block of suspension arm - Google Patents
Positioning method, positioning device and positioning kit for knuckle arm tail sliding block of suspension arm Download PDFInfo
- Publication number
- CN109879183A CN109879183A CN201910189958.2A CN201910189958A CN109879183A CN 109879183 A CN109879183 A CN 109879183A CN 201910189958 A CN201910189958 A CN 201910189958A CN 109879183 A CN109879183 A CN 109879183A
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- joint arm
- positioning
- sliding block
- outline border
- arm
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000725 suspension Substances 0.000 title abstract description 6
- 230000004807 localization Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 8
- WHKUVVPPKQRRBV-UHFFFAOYSA-N Trasan Chemical compound CC1=CC(Cl)=CC=C1OCC(O)=O WHKUVVPPKQRRBV-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Vehicle Body Suspensions (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the technical field of cranes, and discloses a positioning method, a positioning device and a positioning kit for a knuckle boom tail slide block of a suspension arm, wherein the positioning method comprises the following steps: acquiring an outer frame part (1) for simulating an outer knuckle arm; the outer knuckle arm is used for being sleeved on the outer side of an inner knuckle arm (2) of the suspension arm and can stretch relative to the inner knuckle arm (2), and the inner knuckle arm (2) comprises an inner knuckle arm main body (21) and a sliding block arranged on the inner knuckle arm main body (21); positioning the outer frame member (1) outside the inner joint arm (2); and adjusting the clearance between the sliding block and the inner surface of the outer frame component (1) to reach a preset clearance value. According to the technical scheme provided by the invention, the sliding block can be positioned on the knuckle arms, so that the centers of all the knuckle arms of the suspension arm can be kept consistent after the assembly, and the stable stretching of the knuckle arms is ensured. The technical scheme greatly simplifies the positioning difficulty of the sliding block, and can effectively improve the assembly efficiency and the production period of the suspension arm.
Description
Technical field
The present invention relates to crane technical field, more particularly to a kind of joint arm tail portion sliding block of boom localization method,
Positioning device and positioning set.
Background technique
Main bearing member of the telescopic hoist boom as crane, weight typically constitute from the 13%~20% of main screw lift,
And ratio shared by its weight is then bigger in goliath.Therefore, the quality of telescopic arm structure performance not only influences operation
Security reliability, or determine overall mass and an important factor for economic cost, particularly in, hoister in large tonnage is big
The influence of telescopic arm performance is most important in the case of amplitude, high lifting altitude.
Telescopic arm is the thin arm member of box, opposite can be slided between each joint arm, to realize the automatic telescopic of telescopic arm,
Each joint arm head, tail portion are all installed with transmitting forces and the resistance to compression playing the guiding role, wear-resisting sliding block up and down.Telescopic hoist boom
Each joint arm is successively set with, and need to guarantee after center line between each joint arm is overlapped, stretches out not occur with the arm for covering in its outer layer inclined
From.
Gap and relative position between each joint arm are adjusted according to sliding block, hang by the way that adjusting slider is adjustable
The side sway and amount of deflection of arm.The sliding block adjusted is needed to have tail portion top shoe, tail portion side slide, tail portion sliding block in boom assembling,
In addition there are also the leveling etc. of upper and lower guide runner.It is finally the center line coincidence to guarantee every joint arm after single oil cylinder is set with, and
Smoothly, telescoping mechanism runs smoothly the plug of work pin.
In the prior art, the positioning difficulty in realizing between joint arm and the outer joint arm of its suit is larger, in boom installation part
In assembling process, the work such as the prepackage, installation, adjusting of tail portion each position sliding block need to be carried out, must assure that lower guiding is slided after adjusting
Block has uniqueness, no longer changes, and each rear sliding block is uniformly contacted with cylinder inner surface.
Due to structural member fabrication error, it often will appear problem in assembling process, when such as shimming is adjusted, rear top shoe and cylinder
After body reaches zero clearance, lower guide runner does not level yet；In this regard, the surplus adjusted need to be expected when actual treatment, by rear top shoe
Thickness mills thin corresponding size, and vacating space is used for adjusting, and adjusts the sideslip block gap of adjacent arm joint 2 by adjusting gasket
In~3mm.
Therefore to reach this requirement in actual production process then to need with specific process repeatedly reciprocally
External joint arm and interior joint arm are corrected.Error is compensated with suspension arm gap by adjusting gasket adjusting slider；In practical set
In, or even first on the inside of outer joint arm molybdenum disulfide is applied, rubbing the trace that leaves in outer joint arm to observe sliding block judges sliding block
With the gap between outer joint arm, thus to be adjusted.But such proofreading method will increase work on the spot difficulty, significantly improve
Manufacturing cost reduces production efficiency.
Summary of the invention
The purpose of the invention is to overcome the sliding block location difficulty in the joint arm of boom in the prior art, lead to boom system
Make problem at high cost, that production efficiency is low.
To achieve the goals above, one aspect of the present invention provides a kind of localization method of the joint arm tail portion sliding block of boom,
It is characterized in that, the localization method includes:
Obtain the outline border component for simulating outer joint arm, wherein the outer joint arm is the interior joint arm for being sleeved on boom
Outside and can the flexible joint arm of the relatively described interior joint arm, pre-installation has sliding block in the interior joint arm；
The outline border component is located in the outside of the interior joint arm；
The gap adjusted between the sliding block and the inner surface of the outline border component reaches prepsetting gap value.
Preferably, the outline border component includes the outline border main body for being looped around on the outside of the interior joint arm and the outline border master
The positioning element that can be rotated relative to the outline border main body being arranged on body；
The outline border component is located on the outside of the interior joint arm and is specifically included: the positioning element being located in described
In interior joint arm, then the outline border main body is rotated to the predeterminated position of the interior joint arm.
Preferably, the positioning element includes the first positioning that bolt hole is articulated and connected and be provided with the outline border main body
The second positioning region of portion and relatively described first positioning region vertically；
The positioning element is located in the interior joint arm and is specifically included: first positioning region is bolted
On the bolt mechanism of the interior joint arm, and second positioning region is fitted on the bolt mechanism of the interior joint arm.
Preferably, the position for the sliding block being corresponded on the inner surface of the outline border main body is provided with detection plate, the sliding block
Gap of the gap between the detection plate and the sliding block between the inner surface of the outline border component.
Preferably, the interior joint arm includes the sliding block installed in internal segment arm body and the internal segment arm body, is passed through
Gasket is set between the sliding block and the internal segment arm body come adjust the inner surface of the sliding block and the outline border component it
Between gap.
According to another aspect of the present invention, a kind of positioning device for the positioning of boom tail portion sliding block is also provided, it is described fixed
Position device includes the outline border component for simulating outer joint arm, wherein the acromere arm is for being sleeved on the outer of the interior joint arm of boom
Side and can the flexible joint arm of the relatively described interior joint arm, the interior joint arm pre-installation has sliding block；
The outline border component includes for being looped around the outside of the interior joint arm to adjust the gap between the sliding block
Outline border main body and the outline border main body on be arranged can the relatively described interior joint arm positioning positioning element.
Preferably, the positioning element and the outline border main body are articulated and connected.
Preferably, the positioning element includes the first positioning that bolt hole is articulated and connected and be provided with the outline border main body
The second positioning region of portion and relatively described first positioning region vertically.
Preferably, the position on the inner surface of the outline border main body to the correspondence sliding block is provided with detection plate.
In accordance with a further aspect of the present invention, a kind of positioning set is also provided, the positioning set is described including respectively corresponding
The joint arm setting of multiple suits of boom according to positioning device as described above, the sliding block of each joint arm was by should
The positioning device positioning corresponding to joint arm.
Sliding block is located in joint arm by outline border component, can guarantee that each joint arm exists by technical solution provided by the invention
It is consistent to assemble rear center, so that each joint arm is flexible steady.The technical solution compared with the assembly method of traditional boom, by
The joint arm of needs one originally successively carries out continuous adjustment trial assembly, to only outer joint arm is simulated with light outline border component, aligns
It is positioned in the sliding block of the interior joint arm in outline border component, greatly reduces the positioning difficulty of sliding block, simplify the assembly of boom
Process can effectively improve the production cycle of boom.
Detailed description of the invention
Fig. 1 is to be shown according to the structure for using positioning device to position the sliding block in interior joint arm in an embodiment of the invention
It is intended to；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is enlarged drawing at the A of Fig. 2；
Fig. 4 is the structural schematic diagram according to positioning device in an embodiment of the invention；
Fig. 5 is the side view of positioning device shown in Fig. 4；
Fig. 6 is the main view of positioning element in positioning device；
Fig. 7 is the side view of Fig. 6；
Fig. 8 is that multiple joint arms of boom are respectively arranged with the schematic diagram of positioning device.
Description of symbols
1- outline border component；11- outline border main body；12- positioning element；The first positioning region 121-；The second positioning region 122-；123-
Location hole；13- detection plate；14- bolt；Joint arm in 2-；21- internal segment arm body；The tail portion 22- top shoe；The tail portion 23- side slide；
The tail portion 24- sliding block；25- guide runner；26- bolt mechanism；The first positioning device of 10-；The second positioning device of 20-；30- third
Positioning device；The 4th positioning device of 40-；The first joint arm of 100-；The second joint arm of 200-；300- third joint arm；The 4th joint arm of 400-.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can
To be combined with each other.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", " axial direction ", " radial direction ", " circumferential direction "
To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention.In addition, " inside and outside " refers to the inside and outside of the profile relative to each component itself.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.
The present invention provides a kind of localization methods of the joint arm tail portion sliding block of boom, as shown in Figure 1, the localization method packet
It includes:
Obtain the outline border component 1 for simulating outer joint arm；Wherein, the outer joint arm is the interior joint arm for being sleeved on boom
2 outside and can the flexible joint arm of the relatively described joint arm 2, pre-installation has sliding block in the interior joint arm 2, and pre-installation refers to sliding block
Position there is no fixed, it is adjustable；
The outline border component 1 is located in the outside of the interior joint arm 2；
The gap adjusted between the sliding block and the inner surface of the outline border component 1 reaches prepsetting gap value.
The telescopic hoist boom of crane includes the joint arm of multiple suits, and the interior joint arm being each sleeved in outer joint arm (has
The joint arm of outer joint arm referred to here as in joint arm, which can also be the outer joint arm of joint arm in next section) on be provided with it is multiple
Sliding block, tail portion top shoe 22 as shown in figure 1, tail portion side slide 23, tail portion sliding block 24 etc..On the outside of joint arm in guarantee and its
After the assembling of outer joint arm, it is consistent to be able to maintain center, stretches steady, sliding block is located in interior joint arm 2 by present invention first choice.The present invention
The localization method being located in sliding block in interior joint arm provided borrows outline border component 1 and makes sliding block and outer frame in interior joint arm 2
Gap between the inner surface of part 1 reaches prepsetting gap value, and the gap between sliding block and outline border component 1 reaches prepsetting gap value
When, the sliding block positioned in the position can guarantee that interior joint arm 2 is consistent with outer joint arm assembling rear center, stretch steady.Wherein, described
Prepsetting gap value needs to determine first, since single-unit joint arm can not be in view of a whole set of boom be from ghost image after pre-installing tail portion sliding block
It rings, therefore needs to measure its gap width, in this, as the prepsetting gap value, as shown in figure 1 after trying a whole set of boom and being assembled
Shown in gap d 1 between tail portion top shoe 22 and the inner surface of outline border component 1, tail portion side slide 23 is interior with outline border component 1
Gap d 2 between surface, gap d 3, d4, d5 between multiple tail portion sliding blocks 24 and the inner surface of outline border component 1.In sliding block
When reaching the gap width between outline border component 1, sliding block can be located in interior joint arm 2 in this position.
Using localization method provided by the invention, sliding block is located in joint arm, can guarantee joint arm center after assembling
Unanimously, the guide runner 25 in joint arm can be oriented to smoothly, so that each joint arm is flexible steady.Localization method of the invention
Compared with the assembly method of traditional boom, continuous adjustment trial assembly is carried out by original needs one joint arm successively, to only using
Light outline border component 1 simulates outer joint arm, positions, greatly reduces to the sliding block for the interior joint arm being located in outer frame part 1
The positioning difficulty of sliding block simplifies the assembling process of boom, can effectively improve the production cycle of boom.
In a preferred embodiment of the invention, as shown in Figure 4 and Figure 5, the outline border component 1 includes for being looped around
State capable of determining relative to what the outline border main body 11 rotated of being arranged in the outline border main body 11 and the outline border main body 11 in 2 outside of interior joint arm
Position component 12.
The outside that the outline border component 11 is located in the interior joint arm 2 is specifically included: the positioning element 12 is positioned
In the interior joint arm 2, then the outline border main body is rotated to the predeterminated position of the interior joint arm 2.
In present embodiment, the positioning element 12 is the bolt mechanism 26 for being located in interior joint arm 2, therefore is positioned
The position of the correspondence bolt mechanism 26 of outer frame part 1 is arranged in component 12.Wherein the bolt mechanism 26 is the internal segment in boom
Arm stretches out after outer joint arm for positioning the mechanism that outer joint arm is positioned to interior joint arm, which belongs to the common skill of boom
Art, in this not go into detail.
Further specifically, the positioning element 12 includes being articulated and connected with the outline border main body 11 and being provided with bolt hole
123 the first positioning region 121 and relatively the second vertical positioning region 122 of first positioning region 121, as shown in Figure 6 and Figure 7.
The hinge of the positioning element 12 can be fixed on by welding in outline border main body 11, can also pass through the fasteners such as bolt
It is fixed in outline border main body 11.
Wherein, the positioning element 12 is located in the interior joint arm 2 and is specifically included: by first positioning region 121
It is fixed on by bolt 14 on the bolt mechanism 26 of the interior joint arm 2, and second positioning region 122 is fitted in the interior joint arm
It is specific as shown in Figure 1-Figure 3 on 2 bolt mechanism 26.
It will be appreciated by persons skilled in the art that the positioning element 12 in outline border component 1 is not limited to this implementation
Structure type shown in mode, other forms are used to outline border main body 11 being located in interior joint arm 2, so as to adjust cunning
Block and outline border main body 11 reach the location structure of prepsetting gap value.
Interior joint arm 2 includes the sliding block installed in internal segment arm body 21 and internal segment arm body 21, and sliding block is being located in internal segment
During on arm 2, the sliding block is pre-installed in internal segment arm body 21 by mounting bracket first, at this point, the sliding block
The gap of d0 is reserved between internal segment arm body 21, it is preferable that by between the sliding block and the internal segment arm body 21
Gap setting gasket adjusts the gap between the sliding block and the inner surface of the outline border component 1, adjusts sliding block and outer frame
When gap between the inner surface of part 1 reaches prepsetting gap value, then sliding block is positioned.
In addition, in present embodiment, it, can be in outline border main body for convenience of the gap detected between outline border component 1 and sliding block
The position that the sliding block is corresponded on 11 inner surface is provided with detection plate 13, and detection plate 13 protrudes from outline border main body 11, facilitates inspection
It surveys.Therefore the gap between the sliding block and the inner surface of the outline border component 1 is between the detection plate 13 and the sliding block
Gap.In addition, the outline border component 1 can be made to be suitable for the interior joint arm of different size or size by adjusting detection plate 13
Sliding block positioning.
According to another aspect of the present invention, a kind of positioning device for the positioning of boom tail portion sliding block, the positioning are also provided
Device includes the outline border component 1 for simulating outer joint arm, wherein the acromere arm is for being sleeved on the outer of the interior joint arm 2 of boom
Side and can the flexible joint arm of the relatively described interior joint arm 2, the interior joint arm 2 includes internal segment arm body 21 and the internal segment arm body 21
The sliding block of upper setting.
The outline border component 1 include for being looped around the outside of the interior joint arm 2 to adjust between the sliding block between
What is be arranged in the outline border main body 11 of gap and the outline border main body 11 can the positioning element 12 that positions of the interior joint arm 2 relatively.
It can be positioned using the sliding block in the internal joint arm 2 of localization method as described above using the positioning device, from
And guarantee to be able to maintain center after the interior joint arm 2 and the assembling of outer joint arm consistent, it stretches steady.
Preferably, the positioning element 12 is articulated and connected with the outline border main body 11.
Specifically, the positioning element 12 includes being articulated and connected with the outline border main body 11 and being provided with bolt hole 123
First positioning region 121 and relatively the second vertical positioning region 122 of first positioning region 121.The structure shape of the positioning element 12
Formula is suitable for being located in the first positioning region 121 on the bolt mechanism 26 of interior joint arm 2 using bolt, and the second positioning region 122 with
The fitting positioning of bolt mechanism 26.Certainly, which can also be used capable of being located in outline border main body 11 of other forms
Structure in interior joint arm 2.
Preferably, detection plate can be set in the position on the inner surface of the outline border main body 11 to the correspondence sliding block
13, detection plate 13 protrudes from outline border component 1, facilitates detection.
In accordance with a further aspect of the present invention, a kind of positioning set is also provided, which includes respectively corresponding described hang
The positioning device as described above of the joint arm setting of multiple suits of arm, the sliding block of each joint arm pass through the joint arm institute
The corresponding positioning device positioning.
Specifically, as shown in figure 8, the first joint arm 100, the second joint arm 200, third joint arm 300 and the 4th joint arm 400 are energy
Enough sockets fit together so as to flexible joint arm, wherein the sliding block in the first joint arm 100 passes through the first positioning device 10
It positions, the sliding block in the second joint arm 200 positioned by the second positioning device 20, and the sliding block in third joint arm 300 passes through the
Three positioning devices 30 position, and the sliding block in the 4th joint arm 400 is positioned by the 4th positioning device 40, in this way, the first joint arm
100, the sliding block of the second joint arm 200, third joint arm 300 and the 4th joint arm 400 is socketed after positioning fit together after can protect
It is consistent to hold center, stretches steady.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
, can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention, including each particular technique
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection scope.
Claims (10)
1. a kind of localization method of the joint arm tail portion sliding block of boom, which is characterized in that the localization method includes:
Obtain the outline border component (1) for simulating outer joint arm, wherein the outer joint arm is the interior joint arm for being sleeved on boom
(2) outside and can the flexible joint arm of the relatively described interior joint arm (2), pre-installation has sliding block on the interior joint arm (2)；
The outline border component (1) is located in the outside of the interior joint arm (2)；
The gap adjusted between the sliding block and the inner surface of the outline border component (1) reaches prepsetting gap value.
2. localization method according to claim 1, which is characterized in that the outline border component (1) includes for being looped around
State be arranged in outline border main body (11) and the outline border main body (11) on the outside of interior joint arm (2) can the relatively described outline border main body (11)
The positioning element (12) of rotation；
The outline border component (11) is located on the outside of the interior joint arm (2) and is specifically included: the positioning element (12) are fixed
Position then rotates the outline border main body (11) to the predeterminated position of the interior joint arm (2) on the interior joint arm (2).
3. localization method according to claim 2, which is characterized in that the positioning element (12) includes and the outline border master
Body (11) be articulated and connected and be provided with bolt hole (123) the first positioning region (121) and relatively described first positioning region (121) hang down
Straight the second positioning region (122)；
The positioning element (12) is located on the interior joint arm (2) and is specifically included: first positioning region (121) is passed through
Bolt (14) is fixed on the bolt mechanism (26) of the interior joint arm (2), and second positioning region (122) is fitted in described
On the bolt mechanism (26) of joint arm (2).
4. localization method according to claim 2, which is characterized in that correspond to institute on the inner surface of the outline border main body (11)
The position for stating sliding block is provided with detection plate (13), and the gap between the sliding block and the inner surface of the outline border component (1) is institute
State the gap between detection plate (13) and the sliding block.
5. localization method described in any one of -4 according to claim 1, which is characterized in that the interior joint arm (2) includes interior
The sliding block installed in joint arm main body (21) and the internal segment arm body (21), by the sliding block and the interior joint arm master
Gasket is set between body (21) to adjust the gap between the sliding block and the inner surface of the outline border component (1).
6. a kind of positioning device for the positioning of boom tail portion sliding block, which is characterized in that the positioning device includes for simulating
The outline border component (1) of outer joint arm, wherein outside and energy opposite institute of the acromere arm for the interior joint arm (2) for being sleeved on boom
Interior joint arm (2) flexible joint arm is stated, interior joint arm (2) pre-installation has sliding block；
The outline border component (1) include for being looped around the outside of the interior joint arm (2) to adjust between the sliding block between
Be arranged in the outline border main body (11) and the outline border main body (11) of gap can the interior joint arm (2) positioning relatively positioning element
(12)。
7. positioning device according to claim 6, which is characterized in that the positioning element (12) and the outline border main body
(11) it is articulated and connected.
8. positioning device according to claim 7, which is characterized in that the positioning element (12) includes and the outline border master
Body (11) be articulated and connected and be provided with bolt hole (123) the first positioning region (121) and relatively described first positioning region (121) hang down
Straight the second positioning region (122).
9. the positioning device according to any one of claim 6-8, which is characterized in that the outline border main body (11) it is interior
Position on surface to the correspondence sliding block is provided with detection plate (13).
10. a kind of positioning set, the positioning set includes the root for respectively corresponding the joint arm setting of multiple suits of the boom
According to positioning device described in any one of claim 6-9, the sliding block of each joint arm passes through corresponding to the joint arm
The positioning device positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189958.2A CN109879183B (en) | 2019-03-13 | 2019-03-13 | Positioning method, positioning device and positioning kit for knuckle arm tail sliding block of suspension arm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189958.2A CN109879183B (en) | 2019-03-13 | 2019-03-13 | Positioning method, positioning device and positioning kit for knuckle arm tail sliding block of suspension arm |
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| CN109879183A true CN109879183A (en) | 2019-06-14 |
| CN109879183B CN109879183B (en) | 2020-05-15 |
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| CN113582050A (en) * | 2021-07-30 | 2021-11-02 | 三一汽车起重机械有限公司 | Side bending correction device and method for crane boom and crane |
| CN114932411A (en) * | 2022-06-02 | 2022-08-23 | 长沙金威汽车电器有限公司 | Crane arm tail machining device and machining method thereof |
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| CN113582050A (en) * | 2021-07-30 | 2021-11-02 | 三一汽车起重机械有限公司 | Side bending correction device and method for crane boom and crane |
| 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 |
| CN114932411A (en) * | 2022-06-02 | 2022-08-23 | 长沙金威汽车电器有限公司 | Crane arm tail machining device and machining method thereof |
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| CN109879183B (en) | 2020-05-15 |
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