CN108678046A - A kind of excavator swing arm of stress concentration - Google Patents
A kind of excavator swing arm of stress concentration Download PDFInfo
- Publication number
- CN108678046A CN108678046A CN201810543700.3A CN201810543700A CN108678046A CN 108678046 A CN108678046 A CN 108678046A CN 201810543700 A CN201810543700 A CN 201810543700A CN 108678046 A CN108678046 A CN 108678046A
- Authority
- CN
- China
- Prior art keywords
- swing arm
- gusset
- connecting pin
- preceding connecting
- plate
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a kind of excavator swing arms of stress concentration, excavator has traveling wheel 1, supporter 2 is provided with above traveling wheel 1, the front of the supporter 2 is provided with swing arm 3, dipper 4 and scraper bowl 5,11 structure of the preceding connecting pin of swing arm is improved, is improved in the middle part of swing arm 9.Present invention reduces the stress concentrations of swing arm key position, and to improve the intensity of swing arm, the service life of increased swing arm improves the safety of operation.
Description
Technical field
The invention belongs to excavator fields, are related to a kind of excavator swing arm of stress concentration by it.
Background technology
The construction operating mode of excavator is often more complicated, and existing loose sandy soil material operation also has operating mode to compare
Severe mining operation, and under certain special operation conditions, the use intensity of excavator is further increased, this just adds
The intensity requirement to product structure part has been weighed, if there is hidden danger of quality in structural member a certain link in design or production process,
It may adequately be exposed in use, directly result in the generation of severe accident.Therefore, structural member portion on the market
Dividing, which is also one, is easiest to fracture occur, deforms the part for leading to product failure.
Failure for welding structural element, repair and replacement are often all more complicated, need to spend a large amount of manpower and materials,
Prodigious difficulty is caused to after-sale service, also affects the brand image of enterprise, reduces the market competitiveness of enterprise.
Invention content
The present invention to solve the above-mentioned problems, provides a kind of excavator swing arm, and answering for key position can be greatly reduced
Power is concentrated, and the intensity of swing arm is improved.
The present invention specifically uses following technical scheme to realize,
A kind of excavator swing arm of stress concentration, excavator have traveling wheel 1, supporter 2 are provided with above traveling wheel 1,
The front of the supporter 2 is provided with swing arm 3, dipper 4 and scraper bowl 5, and there is the swing arm 3 boom cylinder 6, the dipper 4 to have
There are bucket arm cylinder 7, the scraper bowl 5 that there is bucket cylinder 8, the swing arm to have 9, swing arm front 10 and swing arm rear portion in the middle part of swing arm
12, the swing arm front 10 includes the preceding connecting pin 11 of swing arm, and the swing arm rear portion 12 is provided with swing arm support ear 13, the swing arm
9 both sides of middle part are provided with boom cylinder ear mount 14, and 9 tops are provided with bucket cylinder ear mount 15 in the middle part of swing arm,
The preceding connecting pin 11 of swing arm includes the preceding connecting pin side plate 16 of swing arm and the preceding connecting pin gusset 17 of swing arm, is connected before the swing arm
Connect end 17 bending forming of gusset, the preceding connecting pin side plate of the swing arm 16 is welded on the both sides of the preceding connecting pin gusset of swing arm 17, described
The preceding 17 bending radius of the radian of connecting pin gusset of swing arm is set as 60mm, and the angle between two plates of bending radian connection is 80 °, institute
The preceding connecting pin gusset of the preceding connecting pin side plate of swing arm 16 and swing arm 17 is stated by the way of two-sided welding, the preceding connecting pin muscle of swing arm
One piece of support plate is also welded in plate 17, the support plate uses single fillet welded mode with the preceding connecting pin gusset 17 of swing arm,
9 are provided with gusset 1 at swing arm front 10 in the middle part of swing arm, and the gusset 1 is welded in the middle part of swing arm 9 sky
Gusset 2 21 is arranged at swing arm rear portion 12 in intracavitary at swing arm support ear 13, and the gusset 2 21 is welded on swing arm rear portion 12
Cavity in, pass through connecting plate 1 and connecting plate 2 20 between the gusset 1 and gusset 2 21 and connect, the connecting plate
The top of 2 20 setting boom cylinder ear mounts 14, connecting plate 2 20 are in bending, and lower part is against boom cylinder ear mount 14；The company
Fishplate bar 1 is arranged the lower section of boom cylinder ear mount 14, and connecting plate 1 is in bending, and top is against boom cylinder ear mount 14.
Advantageous effect of the present invention is：The stress concentration for reducing swing arm key position, to improve the intensity of swing arm,
The service life of increased swing arm improves the safety of operation.
Description of the drawings
Fig. 1 excavator overall structure diagrams；
Fig. 2 boom structure schematic diagrames；
End-view is connected before Fig. 3 swing arms；
The preceding connecting pin vertical view of Fig. 4 swing arms；
The preceding connecting pin gusset figure structure schematic representation of Fig. 5 swing arms；
Fig. 6 oil cylinder ear mount front views；
Fig. 7 oil cylinder ear mount vertical views；
Fig. 8 swing arm partial sectional views；
1, traveling wheel in figure, 2, supporter, 3, swing arm, 4 dippers, 5, scraper bowl, 6, boom cylinder, 7, bucket arm cylinder, 8, scraper bowl oil
Cylinder, 9, in the middle part of swing arm, 10, swing arm front, 11, the preceding connecting pin of swing arm, 12, swing arm rear portion, 13, swing arm support ear, 14, swing arm oil
Cylinder ear mount, 15, bucket cylinder ear mount, 16, the preceding connecting pin side plate of swing arm, 17, the preceding connecting pin gusset of swing arm, 18, gusset one, 19,
Connecting plate one, 20, connecting plate two, 21, gusset two.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figures 1-8, the present invention provides a kind of excavator swing arm of stress concentration, the structure of the swing arm can
The stress concentration in the middle part of swing arm is reduced, the risk of swing arm fracture is reduced.
Excavator has traveling wheel 1, supporter 2 is provided with above traveling wheel 1, the front of the supporter 2 is provided with
There is boom cylinder 6, the dipper 4 there is bucket arm cylinder 7, the scraper bowl 5 to have for swing arm 3, dipper 4 and scraper bowl 5, the swing arm 3
There is bucket cylinder 8, it includes dynamic that the swing arm, which has 9, swing arm front 10 and swing arm rear portion 12 in the middle part of swing arm, the swing arm front 10,
The preceding connecting pin 11 of arm, the swing arm rear portion 12 are provided with swing arm support ear 13, and 9 both sides are provided with boom cylinder in the middle part of the swing arm
Ear mount 14,9 top of swing arm middle part are provided with bucket cylinder ear mount 15,
The preceding connecting pin of swing arm 11 is connect with dipper, and 9 connect with bucket cylinder and boom cylinder in the middle part of swing arm, so being connected before swing arm
9 be stress compared with concentration zones in the middle part of end 11 and swing arm, is easy to happen fracture at work.Therefore, it is necessary to the progress of above-mentioned two part
It improves.
The preceding connecting pin 11 of swing arm includes the preceding connecting pin side plate 16 of swing arm and the preceding connecting pin gusset 17 of swing arm, the swing arm
Preceding 17 bending forming of connecting pin gusset, the preceding connecting pin side plate of the swing arm 16 are welded on the both sides of the preceding connecting pin gusset of swing arm 17,
The preceding 17 bending radius of the radian of connecting pin gusset of swing arm is set as 60mm, and the angle between two plates of bending radian connection is
80 °, the preceding connecting pin gusset of the preceding connecting pin side plate 16 of the swing arm and swing arm 17 is connected by the way of two-sided welding before the swing arm
It connects and also welds one piece of support plate in the gusset 17 of end, the support plate uses single fillet welded side with the preceding connecting pin gusset 17 of swing arm
The stress concentration at the preceding connecting pin of swing arm 11 can be greatly reduced in formula, in this way setting.
In order to reduce in the middle part of swing arm 9 stress concentration, using following arrangement, 9 before swing arm in the middle part of swing arm
Gusset 1 is provided at portion 10, the gusset 1 is welded in the middle part of swing arm in 9 cavity, at swing arm rear portion 12 close to swing arm
Gusset 2 21 is set at support ear 13, and the gusset 2 21 is welded in the cavity at swing arm rear portion 12, the gusset 1 and muscle
It is connected by connecting plate 1 and connecting plate 2 20 between plate 2 21, the upper of boom cylinder ear mount 14 is arranged in the connecting plate 2 20
Side, connecting plate 2 20 are in bending, and lower part is against boom cylinder ear mount 14；Boom cylinder ear mount 14 is arranged in the connecting plate 1
Lower section, connecting plate 1 is in bending, and top is against boom cylinder ear mount 14；It can be reduced using such design method dynamic
9 stress concentration in the middle part of arm.
Claims (1)
1. a kind of excavator swing arm of stress concentration, excavator has traveling wheel 1, and supporter is provided with above traveling wheel 1
2, the front of the supporter 2 is provided with swing arm 3, dipper 4 and scraper bowl 5, and the swing arm 3 has boom cylinder 6, the dipper 4
With bucket arm cylinder 7, after there is the scraper bowl 5 bucket cylinder 8, the swing arm to have swing arm middle part 9, swing arm front 10 and swing arm
Portion 12, the swing arm front 10 include the preceding connecting pin 11 of swing arm, and the swing arm rear portion 12 is provided with swing arm support ear 13, described dynamic
9 both sides are provided with boom cylinder ear mount 14 in the middle part of arm, and 9 tops are provided with bucket cylinder ear mount 15 in the middle part of swing arm；
The preceding connecting pin 11 of swing arm includes the preceding connecting pin side plate 16 of swing arm and the preceding connecting pin gusset 17 of swing arm, is connected before the swing arm
Connect end 17 bending forming of gusset, the preceding connecting pin side plate of the swing arm 16 is welded on the both sides of the preceding connecting pin gusset of swing arm 17, described
The preceding 17 bending radius of the radian of connecting pin gusset of swing arm is set as 60mm, and the angle between two plates of bending radian connection is 80 °, institute
The preceding connecting pin gusset of the preceding connecting pin side plate of swing arm 16 and swing arm 17 is stated by the way of two-sided welding, the preceding connecting pin muscle of swing arm
One piece of support plate is also welded in plate 17, the support plate uses single fillet welded mode with the preceding connecting pin gusset 17 of swing arm；
9 are provided with gusset 1 at swing arm front 10 in the middle part of swing arm, and the gusset 1 is welded in the middle part of swing arm 9 sky
Gusset 2 21 is arranged at swing arm rear portion 12 in intracavitary at swing arm support ear 13, and the gusset 2 21 is welded on swing arm rear portion 12
Cavity in, pass through connecting plate 1 and connecting plate 2 20 between the gusset 1 and gusset 2 21 and connect, the connecting plate
The top of 2 20 setting boom cylinder ear mounts 14, connecting plate 2 20 are in bending, and lower part is against boom cylinder ear mount 14；The company
Fishplate bar 1 is arranged the lower section of boom cylinder ear mount 14, and connecting plate 1 is in bending, and top is against boom cylinder ear mount 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810543700.3A CN108678046A (en) | 2018-05-31 | 2018-05-31 | A kind of excavator swing arm of stress concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810543700.3A CN108678046A (en) | 2018-05-31 | 2018-05-31 | A kind of excavator swing arm of stress concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108678046A true CN108678046A (en) | 2018-10-19 |
Family
ID=63809120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810543700.3A Pending CN108678046A (en) | 2018-05-31 | 2018-05-31 | A kind of excavator swing arm of stress concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108678046A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392314A (en) * | 1982-02-16 | 1983-07-12 | J. I. Case Company | Boom and dipper stick construction |
| JPS58164828A (en) * | 1982-03-25 | 1983-09-29 | Kobe Steel Ltd | Manufacture of boom for back hoe type oil-pressure shovel |
| CN101688382A (en) * | 2007-04-25 | 2010-03-31 | 株式会社小松制作所 | Work machine boom |
| CN201574412U (en) * | 2009-12-31 | 2010-09-08 | 斗山工程机械（中国）有限公司 | Movable arm strengthening structure of digging machine and digging machine |
| CN103403263A (en) * | 2011-04-20 | 2013-11-20 | 日立建机株式会社 | Boom for construction machine |
| CN203383251U (en) * | 2013-07-15 | 2014-01-08 | 上海三一重机有限公司 | Excavator boom and excavator |
-
2018
- 2018-05-31 CN CN201810543700.3A patent/CN108678046A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392314A (en) * | 1982-02-16 | 1983-07-12 | J. I. Case Company | Boom and dipper stick construction |
| JPS58164828A (en) * | 1982-03-25 | 1983-09-29 | Kobe Steel Ltd | Manufacture of boom for back hoe type oil-pressure shovel |
| CN101688382A (en) * | 2007-04-25 | 2010-03-31 | 株式会社小松制作所 | Work machine boom |
| CN201574412U (en) * | 2009-12-31 | 2010-09-08 | 斗山工程机械（中国）有限公司 | Movable arm strengthening structure of digging machine and digging machine |
| CN103403263A (en) * | 2011-04-20 | 2013-11-20 | 日立建机株式会社 | Boom for construction machine |
| CN203383251U (en) * | 2013-07-15 | 2014-01-08 | 上海三一重机有限公司 | Excavator boom and excavator |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181019 |