CN205381881U - Swing arm formula tower crane boom main chord member structure - Google Patents
Swing arm formula tower crane boom main chord member structure Download PDFInfo
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- CN205381881U CN205381881U CN201520851972.1U CN201520851972U CN205381881U CN 205381881 U CN205381881 U CN 205381881U CN 201520851972 U CN201520851972 U CN 201520851972U CN 205381881 U CN205381881 U CN 205381881U
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- main chord
- chord member
- joint
- tower crane
- lower edge
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Abstract
The utility model discloses a swing arm formula tower crane boom main chord member structure, including two upper and lower main chord member (12), single connect (11) and double connector (13), main chord member (12) be the pipe structure, and single the joint in (11) and double connector (13) tail end is placeed respectively at the both ends of every main chord member (12) to fixed connection with it. The beneficial effects are that it is not only convenient, swift in process of production, shortened production cycle and manufacturing cost, reduced the welding degree of difficulty, improved the technology precision of structure, reduced the dead weight of jib loading boom.
Description
Technical field
This utility model relates to a kind of main chord structure, particularly relates to a kind of movable arm type derrick runway girder main chord structure.
Background technology
Jib for tower crane main chord at the design relation of crane arm in the Fixture Design of crane arm, processing cost, material cost, tower crane general safety performance etc..As Figure 1-Figure 4, in existing design, the process route of crane arm lower edge is: lower boom end face processing grooved breach machine is added press forging line cutting stock lower edge joint relevant surfaces and pin shaft hole lower contact welds lower boom with lower edge main chord；Crane arm winds up process route: blank tooling pin axis hole and adverse slope mouth otic placode are welded top boom with the main chord that winds up by flame oxygen cutting stock plate blank.Lower edge joint connects with the form of single twin adapter pairing, and single twin adapter inserts main chord two ends respectively, and carries out welding according to pre-allowance.Wait strong everywhere in order to ensure crane arm, lower edge joint need afterbody can stay longer one section for inserting crane arm lower boom, crane arm lower boom can at four shaped grooved breach in face of joint to increase weld seam, and all weld seams are plug welding.Due to the impact of the objective factor such as personnel and environment, the weldquality of this connected mode is difficult to be guaranteed, and directly affects the performance of crane arm.In production and processing lower edge bond process, essence machine dosage is big, production cycle length, relatively costly.
Visible, existing whip-typed tower crane crane arm main chord processing cost is high, there is Fixture Design required precision height, welding deformation sensitive, welder's personnel's level of skill are required high defect, be specifically described as follows: 1, crane arm lower boom exists potential safety hazard.Needing shaped grooved breach on lower edge main chord, main chord so causes destruction to a certain extent, main chord and lower edge joint welding are plug welding, and welding capacity is big, the ropy shortcoming of difficult forming, molded appearance.
2, manufacturing procedure is complicated, workpiece is more.From blank to being finally processed into lower edge main chord, lower edge joint, main chord all needing processing, and lower edge joint tail partial outer face and inner surface all need machine to add, machine adds cost height.
3, the deadweight of lower edge joint is relatively big, lower boom length requirement is higher.For ensureing the requirement of strength of lower edge joint, lower edge joint can be left longer one section of tail, lower edge afterbody is processed into hollow loss of weight and processes, but still wall thickness is thicker, conducts oneself with dignity still bigger；Lower edge joint is for inserting in main chord, and lower boom has step, can be higher to main chord length dimension required precision.
4, weld amount of winding up is big, and deformation is big, and frock dimensional requirement is high.Wind up otic placode position dimension and open shelves must recruitment put into row ensure, to frock require height, add Fixture Design manufacture difficulty.
Therefore be necessary whip-typed tower crane draw beam is optimized design.
Summary of the invention
For above-mentioned existing technical problem, under the premise ensureing crane arm safety, reliability, and crane arm overall weight can be alleviated, improve production efficiency, this utility model provides a kind of movable arm type derrick runway girder main chord structure, it is therefore intended that make crane arm reduce production cost in process of manufacture and to the dependency of frock and welding personnel skill set requirements, and ensure structural safety reliably, humanization designing, integration, reduce production process, improve precision.
For achieving the above object, this utility model provides a kind of movable arm type derrick runway girder main chord structure, including upper and lower two main chords, list joint and twin adapter；Described main chord is circular tube structure, and pipe is better than square tube stress, more saves material.And the two ends of each main chord assign in single joint and twin adapter tail end respectively, and connection fixed thereto.
Further, adopt fillet weld seam between described main chord and single joint and twin adapter, owing to being angle welding, more can be guaranteed than grooved weldquality and outward appearance molding, reduce welding skill set requirements.
Further, described single joint and twin adapter all adopt integral machine add-on type, joint essence machine to add face minimizing and shorten the production cycle, reduce processing cost.
This utility model main string up and down is pipe main chord and single twin adapter composition, and crane arm joints structure form operation is few, with short production cycle, and in the whole course of processing of crane arm, production cost is low, craft precision is high, and frock and welding personnel skill set requirements is lower.Have several advantages that 1, eliminate safe hidden trouble.This lower edge joint form lower boom not shaped grooved opening on main chord, do not damage main chord, it is to avoid because the unsafe impact of main chord that slot-type openings causes.Weld seam is changed into angle welding by grooved weld seam, reduces appearance of weld difficulty, improves weldquality.
2, processing capacity reduces, and manufactures simpler.New-type lower edge joint polished surface reduces, and processing cost is lower；Decrease the processing of the grooved breach of main chord, decrease the manufacturing procedure of main chord；Owing to main chord is for filling in lower edge joint, reduce the dimension precision requirement of main chord.
3, the weight reduction of main string joint.Owing to winding up and lower edge employing same manner composition, prior art is winded up and is welded for sheet material and main string, and empirical evidence sheet material otic placode is below joint form in stock utilization and deadweight two.
4, new-type main string is integral machine add-on type due to single twin adapter, and dimensional accuracy more can be guaranteed than welding otic placode.
Accompanying drawing explanation
Fig. 1 is the structural representation of derrick runway girder lower boom in prior art；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the structural representation of derrick runway girder top boom in prior art；
Fig. 4 is the front view of Fig. 3；
Fig. 5 is structural representation of the present utility model；
Fig. 6 is the front view of Fig. 5；
In figure: 1, lower edge list joint, 2, lower edge main chord, 3, lower edge twin adapter, 4, wind up monaural plate, 5, wind up main chord, 6, bi-lug plate of winding up, 11, single joint, 12, main chord, 13, twin adapter.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 5, Figure 6, this utility model includes upper and lower two main chords 12, single joint 11 and twin adapter 13；Described main chord 12 is circular tube structure, and the two ends of each main chord 12 assign in single joint 11 and twin adapter 13 tail end respectively, and adopt with it fillet weld seam to fix, more can be guaranteed than grooved weldquality and outward appearance molding, reduce welding skill set requirements.
In above-described embodiment, described single joint 11 and twin adapter 13 all adopt integral machine add-on type, reduce and shorten the production cycle.Joint have smart machine add face few, from heavy and light, more can guarantee that the safety of crane arm, outward appearance more can guaranteed advantages.
During enforcement, the blank containing single, double joint 11,13 is obtained first with cutting machine blanking, it is machined out single, double joint 11,13 again processing, final single, double joint 11,13 with dock welding with main chord 12 respectively and become main string, to solve the defects such as prior art weld amount is big, deformation is big, the potential safety hazard of main chord existence, reducing the dimensional requirement to main string, craft precision is high, convenient to use.
By applying this technology, the crane arm main chord of XGTL120 is not only convenient, fast in process of production, shortens production cycle and production cost, reduces welding difficulty, improves the craft precision of structure, reduces the deadweight of crane arm.Meanwhile, the design of also other products is had important reference value and using value.
Claims (3)
1. a movable arm type derrick runway girder main chord structure, it is characterised in that include upper and lower two main chords (12), single joint (11) and twin adapter (13)；Described main chord (12) is circular tube structure, and the two ends of each main chord (12) are assigned in single joint (11) and twin adapter (13) tail end respectively, and connection fixed thereto.
2. a kind of movable arm type derrick runway girder main chord structure according to claim 1, it is characterised in that adopt fillet weld seam between described main chord (12) and single joint (11) and twin adapter (13).
3. a kind of movable arm type derrick runway girder main chord structure according to claim 1 and 2, it is characterised in that described single joint (11) and twin adapter (13) all adopt integral machine add-on type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520851972.1U CN205381881U (en) | 2015-10-30 | 2015-10-30 | Swing arm formula tower crane boom main chord member structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520851972.1U CN205381881U (en) | 2015-10-30 | 2015-10-30 | Swing arm formula tower crane boom main chord member structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205381881U true CN205381881U (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520851972.1U Active CN205381881U (en) | 2015-10-30 | 2015-10-30 | Swing arm formula tower crane boom main chord member structure |
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| CN (1) | CN205381881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105480874A (en) * | 2015-10-30 | 2016-04-13 | 徐州建机工程机械有限公司 | Cargo boom main chord rod structure of tower crane with luffing boom |
-
2015
- 2015-10-30 CN CN201520851972.1U patent/CN205381881U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105480874A (en) * | 2015-10-30 | 2016-04-13 | 徐州建机工程机械有限公司 | Cargo boom main chord rod structure of tower crane with luffing boom |
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| GR01 | Patent grant |