CN201301181Y - Retractable jib - Google Patents
Retractable jib Download PDFInfo
- Publication number
- CN201301181Y CN201301181Y CNU2008201805205U CN200820180520U CN201301181Y CN 201301181 Y CN201301181 Y CN 201301181Y CN U2008201805205 U CNU2008201805205 U CN U2008201805205U CN 200820180520 U CN200820180520 U CN 200820180520U CN 201301181 Y CN201301181 Y CN 201301181Y
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- China
- Prior art keywords
- jib
- tube
- web
- crane
- telescopic boom
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to the technical field of cranes, in particular to a retractable jib. The retractable jib comprises an upper jib cylinder and a lower jib cylinder; wherein, the upper jib cylinder comprises a top plate, a left webplate and a right webplate; the left webplate and the right webplate are arranged on both sides of the top plate; the top plate is curved; and the left webplate and the right webplate are tangentially connected with the top plate. Under the circumstance of the same hoisting performance, the weight of the jib with the structure can be reduced by 3.5 percent compared with the weight of the conventional jib, consequently, the weight of the jib is reduced, and the hoisting performance is improved; because of the structure, the stress is little at the socket joint of the retractable jib, and the stress distribution is good; under the circumstances of the same sectional area and stress, the flexivity of the jib with the structure can be reduced by 13.1 percent compared with the flexivity of the conventional jib, so the anti-deformation capability of the retractable jib is greatly enhanced.
Description
Technical field
The utility model relates to the hoisting crane technical field, relates in particular to a kind of telescopic boom.
Background technology
Crane arm is the main load bearing component of automobile crane, is the key member that concerns the automobile crane lifting performance.The crane arm of automobile crane is a telescopic boom, and each saves the mutual socket of crane arm.Along with the lifting tonnage of automobile crane is increasing, crane arm is increasing to the influence of the lifting performance of automobile crane.Under the situation of identical crane capacity, the own wt of crane arm is light more good more, and local stress is the smaller the better, and promptly crane arm cross section structure shape is reasonable more, and the distribution of stress on the crane arm cross section is even more, and the lifting performance of automobile crane is just good more.
The crane arm of automobile crane generally is made up of upper arm tube and underarm tube two parts, and the version of crane arm has determined the loading capability that is subjected to of crane arm.At present, the crane arm section form of automobile crane mainly contains quadrangle, hexagon, trapezoidal, octagon, U-shaped.When the automobile crane hoisting weight reaches certain tonnage, traditional crane arm cross section structure shape has just seriously restricted the lifting performance of automobile crane, the one, the planform decision crane arm own wt of traditional crane arm is big, influences the lifting performance of automobile crane; The 2nd, traditional crane arm cross section structure shape can't make section stress be tending towards rectangular distribution, makes local stress bigger, causes local buckling easily, has a strong impact on the reliability and stability of automobile crane.Therefore, need work out a kind of from heavy and light, crane arm cross section structure shape rational in infrastructure, to improve the lifting performance of automobile crane.
Name is called the utility model patent of " a kind of telescopic boom of egg circular section ", disclosed crane arm, and its section form is trapezoidal for the upper arm tube, the underarm tube is oval; Name is called the patent of " variable section form crane arm ", and the characteristics of disclosed crane arm are the thickness difference of lower cover, in fact lower cover are divided into three sections; Name is called the patent of " telescopic boom hoisting crane with accurate elliptic cross-section jib ", disclosed crane arm, and its section form is a trapezium structure for the upper arm tube, the underarm tube is polygon semicircle; Name is called the patent of " a kind of hoisting crane arm ", and disclosed crane arm, its section form are the hexagonal structure of rounding for the upper arm tube; Name is called the patent of " a kind of hoisting crane arm ", disclosed crane arm, and its section form upper cover plate is trapezoidal, lower cover is an arc, and its thickness changes; Name is called the patent of " the automatic telescopic U-shaped crane arm of inner interlocking ", disclosed crane arm, and its cross section is that last bent plate is a great circle chamfered groove shape bent plate, following bent plate is a hendecagon flute profile bent plate.
The crane arm of above patent disclosure is compared with traditional crane arm, mainly be that underarm tube to crane arm improves, make the underarm tube cross section structure more rationally, have preferably that distribution of stress, weight are alleviated, weight is too big, the uneven problem of distribution of stress but the cross section structure of the upper arm tube of crane arm still exists.
The utility model content
The utility model exists at the cross section structure of the upper arm tube of crane arm in the prior art that weight is too big, the uneven problem of distribution of stress, and a kind of telescopic boom is provided.
A kind of telescopic boom comprises upper arm tube and underarm tube, it is characterized in that, described upper arm tube is made up of the left web of top board and both sides thereof, right web, and described top board is curved, and described left web, described right web are connected with described top board is tangent.
Preferably, described left web, described right web symmetry and be parallel distribution.
Described left web, described right web symmetry and all be tilt distribution, described left web, described right web all upwards are contracted to described top board from bottom separately.
Preferably, described upper arm tube and described underarm tube are by being welded to connect, and weld seam is positioned at the low stress area of crane arm cylindrical shell both sides.
The telescopic boom that the utility model provides, its upper arm tube is made up of top board, left web, right web, and top board is curved, and left web, right web are connected with top board is tangent respectively.This telescopic boom is optimized the upper arm tube, makes that the cross section structure form of upper arm tube is more reasonable.Under the identical situation of lifting performance, the crane arm of this structure is compared with traditional crane arm, can reduce by 3.5% weight, thereby has reduced the weight of crane arm, has improved lifting performance; This structure can have less stress and distribution of stress preferably at the socket place of telescopic boom; Under identical sectional area, identical stressing conditions, the crane arm of this structure is compared with traditional crane arm, and its amount of deflection has reduced 13.1%, has greatly improved its non-deformability.
Description of drawings
The schematic cross-section of the telescopic boom that Fig. 1 provides for the utility model first embodiment;
The schematic cross-section of the upper arm tube in the telescopic boom that Fig. 2 provides for the utility model second embodiment;
Wherein, among Fig. 1-Fig. 2:
1-upper arm tube;
The 101-top board;
102-left side web;
The right web of 103-;
2-underarm tube.
The specific embodiment
Below in conjunction with accompanying drawing content of the present utility model is described, following description only is exemplary and indicative, should any restriction not arranged to protection domain of the present utility model.
Please referring to Fig. 1, the schematic cross-section of the telescopic boom that Fig. 1 provides for the utility model first embodiment.
As shown in Figure 1, this telescopic boom comprises 1 upper arm tube and underarm tube 2, wherein, upper arm tube 1 is made up of the left web 102 and the right web 103 of top board 101 and both sides thereof, top board 101 is curved, a left side web 102, right web 103 symmetries and be parallel distribution, left web 102, right web 103 and 101 tangent connections of top board.Upper arm tube 1 and underarm tube 2 be by being welded together, and the weld seam between upper arm tube 1 and the underarm tube 2 is positioned at the low stress area of crane arm cylindrical shell both sides, can reduce the influence of welding stress to the crane arm structural strength greatly like this.
Below introduce the advantage of this telescopic boom.
The telescopic boom that the utility model provides, its upper arm tube is made up of top board, left web, right web, and top board is curved, and left web, right web are connected with top board is tangent respectively.This telescopic boom is optimized the upper arm tube, makes that the cross section structure form of upper arm tube is more reasonable, and the distribution of the suffered stress in upper arm tube cross section is more even.Under the identical situation of lifting performance, the crane arm of this structure is compared with traditional crane arm, can reduce by 3.5% weight, thereby has reduced the weight of crane arm, has improved the lifting performance of automobile crane; This structure can have less stress and distribution of stress preferably at the socket place of telescopic boom; Under identical sectional area, identical stressing conditions, the crane arm of this structure is compared with traditional crane arm, and its amount of deflection has reduced 13.1%, has greatly improved its non-deformability.
Please referring to Fig. 2, the schematic cross-section of the telescopic boom that Fig. 2 provides for the utility model second embodiment.
This telescopic boom comprises 1 upper arm tube and underarm tube 2, wherein, upper arm tube 1 is made up of the left web 102 and the right web 103 of top board 101 and both sides thereof, as shown in Figure 2, top board 101 is curved, a left side web 102, right web 103 symmetries and be tilt distribution, left web 102, right web 103 all upwards are contracted to top board 101, left web 102, right web 103 and 101 tangent connections of top board from bottom separately.Upper arm tube 1 and underarm tube 2 be by being welded together, and the weld seam between upper arm tube 1 and the underarm tube 2 is positioned at the low stress area of crane arm cylindrical shell both sides, can reduce the influence of welding stress to the crane arm structural strength greatly like this.
All the other implementation processes are similar to the above embodiments, no longer are described in detail at this.
The above only is the description of preferred implementation of the present utility model; should be understood that; because the finiteness of literal expression; and objectively have unlimited concrete structure; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a telescopic boom comprises upper arm tube and underarm tube, it is characterized in that, described upper arm tube is made up of the left web of top board and both sides thereof, right web, and described top board is curved, described left web, right web and described top board is tangent is connected.
2. telescopic boom according to claim 1 is characterized in that, described left web, described right web symmetry and be parallel distribution.
3. telescopic boom according to claim 1 is characterized in that, described left web, described right web symmetry and all be tilt distribution, and described left web, described right web all upwards are contracted to described top board from bottom separately.
4. according to each described telescopic boom of claim 1-3, it is characterized in that described upper arm tube and described underarm tube are by being welded to connect, and weld seam is positioned at the low stress area of crane arm cylindrical shell both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201805205U CN201301181Y (en) | 2008-12-01 | 2008-12-01 | Retractable jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201805205U CN201301181Y (en) | 2008-12-01 | 2008-12-01 | Retractable jib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201301181Y true CN201301181Y (en) | 2009-09-02 |
Family
ID=41084800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201805205U Expired - Fee Related CN201301181Y (en) | 2008-12-01 | 2008-12-01 | Retractable jib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201301181Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104495649A (en) * | 2014-12-19 | 2015-04-08 | 徐州重型机械有限公司 | Telescopic boom and crane |
| CN107441661A (en) * | 2017-07-26 | 2017-12-08 | 广东永强奥林宝国际消防汽车有限公司 | A kind of arm support of lightweight used in fire-fighting |
| CN108033369A (en) * | 2017-11-29 | 2018-05-15 | 太原重工股份有限公司 | Telescopic arm and the crane for including this telescopic arm |
| CN108137296A (en) * | 2015-10-13 | 2018-06-08 | 株式会社多田野 | Work machine swing arm |
| CN110733979A (en) * | 2019-11-19 | 2020-01-31 | 姚运文 | Upper side light load single welding seam crane boom |
-
2008
- 2008-12-01 CN CNU2008201805205U patent/CN201301181Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104495649A (en) * | 2014-12-19 | 2015-04-08 | 徐州重型机械有限公司 | Telescopic boom and crane |
| CN108137296A (en) * | 2015-10-13 | 2018-06-08 | 株式会社多田野 | Work machine swing arm |
| CN108137296B (en) * | 2015-10-13 | 2019-09-24 | 株式会社多田野 | Work machine swing arm |
| CN107441661A (en) * | 2017-07-26 | 2017-12-08 | 广东永强奥林宝国际消防汽车有限公司 | A kind of arm support of lightweight used in fire-fighting |
| CN108033369A (en) * | 2017-11-29 | 2018-05-15 | 太原重工股份有限公司 | Telescopic arm and the crane for including this telescopic arm |
| CN110733979A (en) * | 2019-11-19 | 2020-01-31 | 姚运文 | Upper side light load single welding seam crane boom |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20131201 |