CN109306715A - Upper swing arm and binodal swing arm and excavator - Google Patents
Upper swing arm and binodal swing arm and excavator Download PDFInfo
- Publication number
- CN109306715A CN109306715A CN201810815247.7A CN201810815247A CN109306715A CN 109306715 A CN109306715 A CN 109306715A CN 201810815247 A CN201810815247 A CN 201810815247A CN 109306715 A CN109306715 A CN 109306715A
- Authority
- CN
- China
- Prior art keywords
- swing arm
- pivoting support
- box
- welded
- arm
- 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.)
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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
-
- 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
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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)
- Shovels (AREA)
Abstract
The present invention relates to excavator swing arms, to solve the problems, such as that existing upper swing arm rear support and undersetting are easy to appear cracking when bearing substantial load and lead to reliability decrease；A kind of upper swing arm is provided, mainly it is welded box-structure by upper flange, lower wing plate and left web, right web, the support before the front end of box-structure is welded with, upper bracket is welded on upper flange, it further include the pivoting support being welded at box-structure open rearward end, pivoting support is casting integrated molding, is provided with downward moving arm hinge hole and upper boom cylinder hinge hole, the front of pivoting support simultaneously with the upper flange of the box-structure, lower wing plate, left web and there is the rear end of web mutually to weld.In the present invention, it is all disposed within casting integrated molding pivoting support for the hinge hole hinged with downward moving arm and upper boom cylinder, no-welding-seam between two hinge holes does not have weld cracking risk when bearing load, and the weld seam of pivoting support and body structure is simply regular, is easy to control welding quality.
Description
Technical field
The present invention relates to a kind of swing arms, more specifically to a kind of upper swing arm and binodal swing arm and excavator.
Background technique
There is a kind of binodal swing arm excavator in excavator, in this excavator, swing arm is made of two section swing arms.Binodal is dynamic
Arm is respectively downward moving arm and upper swing arm, and the lower end of downward moving arm is articulated with revolving platform of excavator, and in downward moving arm and revolving platform
Between be connected with and push the downward moving arm oil cylinder that rotates around hinge joint of downward moving arm.The rear end of upper swing arm and the upper end of downward moving arm are hinged,
Boom cylinder is provided between upper swing arm and downward moving arm pushes upper boom cylinder to rotate around downward moving arm upper end hinge joint, upper swing arm
Front end and dipper it is hinged.
Existing upper swing arm is box-structure, is mainly welded by left and right web, upper flange and lower wing plate, in box
The rear end of structure is provided with rear support, for downward moving arm upper end it is hinged, undersetting is provided on the downside of box-structure rear portion, use
It is connect in upper boom cylinder.Support is used for hinged with dipper before the front end of box-structure is provided with, and is set on the upside of box-structure
Upper bracket is equipped with for hinged with bucket arm cylinder.In the existing structure, undersetting is usually that hinged ear connecting plate is welded on bottom wing
On plate, rear support is usually the casting or hinged cylinder of single hinge hole, the upper lower wing plate and left and right abdomen of rear support and box-structure
Plate mutually welds.In existing technology, rear support and undersetting are that upper swing arm box-structure is fixed on each by welding manner
On two components, and the load born on rear support and undersetting is huge, on undersetting and rear support between have it is numerous
Weld seam and weld seam is irregular, under the effect of huge load, these commissures are easy to appear the situation of stress concentration and to weld
The risk of seam cracking is promoted, to reduce the reliability of swing arm.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to existing upper swing arm rear support and undersetting when bearing substantial load
It is easy to appear cracking and leads to reliability decrease, and a kind of upper swing arm and binodal swing arm and excavator are provided, in simplification after swing arm
The structure in portion reduces weld seam, improves the reliability of swing arm in reduction a possibility that the weld cracking of swing arm rear portion.
The present invention is to realize that the technical solution of its purpose is such that provide a kind of upper swing arm, mainly by upper flange, bottom wing
Plate and left web, right web are welded box-structure, the support before the front end of box-structure is welded with, and are welded on upper flange
Upper bracket, it is characterised in that further include the pivoting support being welded at the box-structure open rearward end, the pivoting support is
Casting integrated molding is provided with downward moving arm hinge hole and upper boom cylinder hinge hole, and the front of the pivoting support is simultaneously
With the upper flange of the box-structure, lower wing plate, left web and there is the rear end of web mutually to weld.In the present invention, for under
The hinge hole of swing arm and upper boom cylinder is all disposed on casting integrated molding pivoting support, no-welding-seam between two hinge holes,
There is no weld cracking risk when bearing load, and the weld seam of pivoting support and body structure is simply regular, is easy to control weldering
Connect quality.
Further, in above-mentioned upper swing arm, the front of the pivoting support is in rectangle, all has platform on the outside of every one side
Stage structure, two planes of each step structure respectively constitute the faying surface being bonded with box-structure inner wall and with box-structure side
Wall rear end face docks the groove mutually welded.It is butt welding between pivoting support and body structure, weld strength is high, and weld seam
For straight line, it is easy to control weldquality in the welding process.
Further, the front of the pivoting support is oblique, and bottom is less than hinge at a distance from box-structure front end
Holder top is connect at a distance from box-structure front end.The front of the pivoting support is oblique, so that pivoting support and cabinet
Fusion length in structure between the web of left and right increases, to reduce the stress of unit length commissure, enhances support and case
Weld strength between type structure reduces weld cracking risk.
Further, the front end face of the pivoting support has caveli, and setting caveli can reduce the weight of pivoting support
Amount.
The present invention is to realize that the technical solution of its purpose is such that disclose a kind of binodal swing arm, including upper swing arm, lower move
Arm and upper boom cylinder, wherein upper swing arm is upper swing arm above-mentioned, the upper swing arm passes through the downward moving arm hinge on its pivoting support
It connects that hole and the upper end of the downward moving arm are hinged, passes through upper boom cylinder hinge hole and the upper boom cylinder on its pivoting support
One end it is hinged, the other end and the downward moving arm of the upper boom cylinder are hinged.
The present invention is to realize that the technical solution of its purpose is such that disclose a kind of excavator, it is characterised in that before having
The binodal swing arm stated.
Compared with prior art, the present invention the present invention is solved by by downward moving arm hinge hole and upper boom cylinder hinge hole
It is arranged on the pivoting support of casting as a whole, under the premise of not increasing weight, structure is simplified, after improving swing arm
The strength and stiffness of portion's hinge area, and the appearance of stress concentration is avoided, solve the problems such as region weld cracking.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of binodal swing arm in excavator of the present invention.
Fig. 2 be in the present invention on move post-brachial partial schematic diagram.
Fig. 3 is the structural schematic diagram of pivoting support in the present invention.
Fig. 4 is the partial schematic diagram on pivoting support top in the present invention.
Fig. 5 is the partial schematic diagram of pivoting support lower part in the present invention.
Parts title and serial number in figure:
Upper frame of excavator 1, downward moving arm 2, upper swing arm 3, upper bracket 31, upper flange 32, left web 33, lower wing plate 34,
Dipper 4, pivoting support 5, downward moving arm hinge hole 51, upper boom cylinder hinge hole 52, caveli 53, upside faying surface 541, upside
Groove 542, left side faying surface 551, left side groove 552, downside faying surface 561, downside groove 562.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
Fig. 1 shows the connection schematic diagram of binodal swing arm and dipper in binodal swing arm excavator, which can be
Crawler-mounted excavator or wheel excavator.In the excavator, swing arm is binodal swing arm, and binodal swing arm includes downward moving arm 2 and upper
Swing arm 3.Wherein the lower end of downward moving arm 2 is connect with upper frame of excavator 1, and in downward moving arm 2 and upper frame of excavator 1
Between be connected with downward moving arm oil cylinder (not shown), the flexible of downward moving arm oil cylinder can push downward moving arm around its lower end hinge joint
It swings up and down.The rear end of upper swing arm 3 and the upper end of downward moving arm 2 are hinged, and move in connection between upper swing arm 3 and downward moving arm 2
Arm oil cylinder (not shown), swing arm is swung up and down around its rear end hinge joint in the flexible promotion of upper boom cylinder.Before upper swing arm 3
Hinged dipper 4 is held, and connects bucket arm cylinder between dipper 4 and upper swing arm 3, the flexible promotion dipper of bucket arm cylinder is around upper swing arm
Front end hinge joint swing.The lower end of dipper then hingedly works accessory.
As shown in Fig. 2, the case that upper swing arm 3 is mainly welded by upper flange 32, left web 33, right web, lower wing plate 34
Type structure, for the preceding support hinged with dipper 4, the upside rear portion of upper flange 42 is welded with branch for the front end welding of box-structure
Seat 31, for hinged with the rear end of bucket arm cylinder.Opening in box-structure rear end be welded with for upper boom cylinder and
The hinged pivoting support 5 of downward moving arm.
As shown in figure 3, pivoting support 5 is single-casting, it is provided with downward moving arm hinge hole 51 and upper boom cylinder hinge
Hole 52 is connect, pivoting support 5 is hinged by downward moving arm hinge hole 51 and the upper end of downward moving arm 2, passes through upper boom cylinder hinge hole 52
It is hinged with the upper end of boom cylinder.
The front end of pivoting support 5 and the rear end of box-structure are mutually welded, and the front of pivoting support 5 is in rectangle and before it
Mitigate the weight of pivoting support 5 on end face with caveli 53.Every one side of 5 front of pivoting support all has step structure,
As shown in Fig. 4 Fig. 5, the upside step structure on 5 top of pivoting support is made of upside faying surface 541 and upside groove 542, upside
Faying surface 541 is bonded overlap joint with the medial surface of upper flange 32, and upside groove 542 is then opposite with the rear end face of upper flange 32, weldering
Butt weld is formed when connecing；The left side step structure in 5 left side of pivoting support is made of left side faying surface 551 and left side groove 552,
Left side faying surface 551 is bonded overlap joint with the medial surface of left web 33, the then rear end face phase with left web 33 of left side groove 552
Right, when welding, forms butt weld；The downside step structure of 5 downside of pivoting support is by downside faying surface 561 and downside groove 562
Constitute, downside faying surface 561 is bonded overlap joint with the medial surface of lower wing plate 34, downside groove 562 then with the rear end end of lower wing plate 34
Face is opposite, and when welding forms butt weld；Also equally there is similar right side step structure on the right side of pivoting support 5, and with the right side
Web constitutes corresponding connection structure.
As shown in Fig. 2 Fig. 3, the front of pivoting support 5 is oblique, and bottom is less than hinge at a distance from box-structure front end
Holder top is connect at a distance from box-structure front end.The front of pivoting support is oblique, so that pivoting support and body structure
Fusion length between middle left and right web increases, to reduce the stress of unit length commissure, enhances support and box knot
Weld strength between structure reduces weld cracking risk.
Claims (6)
1. a kind of upper swing arm, mainly it is welded the box knot of open rearward end by upper flange, lower wing plate and left web, right web
Structure, the support before the front end of box-structure is welded with are welded with upper bracket on upper flange, it is characterised in that further include being welded on institute
The pivoting support at box-structure open rearward end is stated, the pivoting support is casting integrated molding, is provided with downward moving arm hinge
Connect hole and upper boom cylinder hinge hole, the front of the pivoting support while upper flange, lower wing plate, a left side with the box-structure
Web is mutually welded with the rear end for having web.
2. upper swing arm according to claim 1, it is characterised in that the front of the pivoting support is in rectangle, every one side
Outside all has step structure, two planes of each step structure respectively constitute the faying surface being bonded with box-structure inner wall and
The groove mutually welded is docked with box-structure side wall rear end face.
3. upper swing arm according to claim 2, it is characterised in that the front of the pivoting support is oblique, bottom with
The distance of box-structure front end is less than pivoting support top at a distance from box-structure front end.
4. upper swing arm according to any one of claim 1 to 3, it is characterised in that the front end face of the pivoting support has
Caveli.
5. a kind of binodal swing arm, including upper swing arm, downward moving arm and upper boom cylinder, it is characterised in that the upper swing arm is wanted for right
Upper swing arm described in asking any one of 1 to 4, the upper swing arm pass through downward moving arm hinge hole on its pivoting support and described lower dynamic
The upper end of arm is hinged, and one end by upper boom cylinder hinge hole and the upper boom cylinder on its pivoting support is hinged, institute
The other end and the downward moving arm for stating boom cylinder are hinged.
6. a kind of excavator, it is characterised in that have binodal swing arm described in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810815247.7A CN109306715A (en) | 2018-07-24 | 2018-07-24 | Upper swing arm and binodal swing arm and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810815247.7A CN109306715A (en) | 2018-07-24 | 2018-07-24 | Upper swing arm and binodal swing arm and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109306715A true CN109306715A (en) | 2019-02-05 |
Family
ID=65225968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810815247.7A Withdrawn CN109306715A (en) | 2018-07-24 | 2018-07-24 | Upper swing arm and binodal swing arm and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109306715A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429953A (en) * | 2002-01-04 | 2003-07-16 | 株式会社小松制作所 | Long structure unit of construction machinery |
| CN201358479Y (en) * | 2009-02-21 | 2009-12-09 | 徐州徐挖约翰迪尔机械制造有限公司 | Double-section foldable moving arm of digger |
| CN201649145U (en) * | 2009-12-31 | 2010-11-24 | 斗山工程机械（中国）有限公司 | Excavator and forearm thereof |
| CN102561427A (en) * | 2012-03-08 | 2012-07-11 | 常林股份有限公司 | Bucket rod of excavator |
| WO2012157673A1 (en) * | 2011-05-19 | 2012-11-22 | 日立建機株式会社 | Arm for construction machinery |
-
2018
- 2018-07-24 CN CN201810815247.7A patent/CN109306715A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429953A (en) * | 2002-01-04 | 2003-07-16 | 株式会社小松制作所 | Long structure unit of construction machinery |
| CN201358479Y (en) * | 2009-02-21 | 2009-12-09 | 徐州徐挖约翰迪尔机械制造有限公司 | Double-section foldable moving arm of digger |
| CN201649145U (en) * | 2009-12-31 | 2010-11-24 | 斗山工程机械（中国）有限公司 | Excavator and forearm thereof |
| WO2012157673A1 (en) * | 2011-05-19 | 2012-11-22 | 日立建機株式会社 | Arm for construction machinery |
| CN102561427A (en) * | 2012-03-08 | 2012-07-11 | 常林股份有限公司 | Bucket rod of excavator |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190205 |