CN109537656A - Swing arm, the manufacturing method of swing arm and excavator - Google Patents
Swing arm, the manufacturing method of swing arm and excavator Download PDFInfo
- Publication number
- CN109537656A CN109537656A CN201811431277.4A CN201811431277A CN109537656A CN 109537656 A CN109537656 A CN 109537656A CN 201811431277 A CN201811431277 A CN 201811431277A CN 109537656 A CN109537656 A CN 109537656A
- Authority
- CN
- China
- Prior art keywords
- swing arm
- cover plate
- partition
- mounting hole
- upper cover
- 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)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a kind of swing arms, the manufacturing method and excavator of swing arm, the swing arm includes swing arm main body and partition (10), the swing arm main body has inner cavity and limits the wall portion (20) of the inner cavity, the partition (10) is installed in the inner cavity, the partition (10) circumferentially offers mounting hole (11), the wall portion (20) is provided with through-hole (21) corresponding with the mounting hole (11), the wall portion (20) and partition (10) are connect by passing through the mounting hole (11) with the fastener (30) of the through-hole (21).Swing arm of the invention fatigue admissable stress with higher, it is not necessary that upper cover plate, lower cover plate and web is truncated, also, the positioning of upper cover plate, lower cover plate and web is convenient and efficient, reduces manufacturing cost.
Description
Technical field
The present invention relates to excavator technical fields, more particularly to a kind of swing arm, the manufacturing method of swing arm and excavator.
Background technique
The boom structure of existing excavator is mainly the box as made of the components welding such as upper cover plate, lower cover plate, web
Structure further according to the needs connecting with other components, then is provided with front support, rear support, bucket arm cylinder otic placode, boom cylinder
The structures such as seat.
Excavator bears frequent impact load, rotary braking load, the unbalance loading of the asymmetric excavation of scraper bowl in operation process
Lotus causes the box-structure of swing arm is not simple to bear flecition, and there is also the complicated applied forces such as torsion, shearing.It is dynamic to improve
The integral strength of arm configuration, many excavator manufacturers can be arranged in swing arm appropriate location and reinforce when designing boom structure
Partition, the partition and upper cover plate, lower cover plate are spliced in the form of welding between web.Meanwhile to realize partition
Welding, it is necessary to consider swing arm upper cover plate, lower cover plate, web is in place is truncated in advance, after the completion of partition welding again
The structure of welding truncation.And will there are problems that the following by the way of this welding: although (1), in the appropriate position of swing arm
The partition for installing reinforcement helps to increase the integral strength of boom structure, but because the partition is welding structure, in identical work
Make under rank, welded fatigue admissable stress is lower than non-solder structure, therefore, for boom structure, although whole strong
Degree increases, but fatigue admissable stress reduces, if reinforcing, partition is not set may properly to reduce swing arm instead
Fatigue life；(2), the partition of boom structure and upper cover plate, lower cover plate, between web to be welded to connect, to make welding be able to reality
It is existing, it is necessary to upper cover plate, lower cover plate and web are truncated before partition welding, after the completion of partition welding again welding one
It rises.This aspect increases welding workload, and on the other hand, the increase of weld seam can reduce the fatigue admissable stress of component；(3),
Upper cover plate, lower cover plate, web are welding structure, to guarantee to splice the accuracy of position Relatively orientation, need to increase swing arm case
Type structure entirety positioning tool, can additionally increase manufacturing cost.
Summary of the invention
It is of the existing technology the purpose of the invention is to overcome the problems, such as, the manufacturing method of a kind of swing arm, swing arm is provided
And excavator, swing arm fatigue admissable stress with higher, without being truncated upper cover plate, lower cover plate and web, also, on
The positioning of cover board, lower cover plate and web is convenient and efficient, reduces manufacturing cost.
To achieve the goals above, one aspect of the present invention provides a kind of swing arm, and the swing arm includes swing arm main body and partition,
The swing arm main body has inner cavity and limits the wall portion of the inner cavity, and the partition is installed in the inner cavity, the partition edge
Mounting hole is circumferentially offered, the wall portion is provided with through-hole corresponding with the mounting hole, the wall portion and partition by wearing
The mounting hole is crossed to connect with the fastener of the through-hole.
Preferably, the partition includes existing with wall portion mounting plate portion disposed in parallel, the mounting hole perforation setting
In the mounting plate portion.
Preferably, the swing arm includes multiple fasteners, and fastener described in wherein at least one is self-plugging rivet.
Preferably, fastener described in wherein at least one is solid rivet.
Preferably, the swing arm main body includes upper cover plate, lower cover plate and web, the upper cover plate, the lower cover plate with
And the web surrounds the box-structure with the inner cavity, the through-hole be set to the upper cover plate, the lower cover plate and
On the web.
Preferably, the mounting plate portion includes two levels of support plate and the circumferential bending formation along the support plate
Portion and two vertical portions, the horizontal part and the vertical portion are interconnected so as to form the frame structure of rectangle, the mounting hole
Perforation is arranged on the horizontal part and the vertical portion.
Preferably, it is connected between two horizontal parts and two vertical portions by welding；And/or the web
Pass through welded connecting between the upper cover plate, the lower cover plate.
Preferably, the swing arm includes the multiple partitions being arranged along the length direction of the swing arm main body.
Second aspect of the present invention provides a kind of excavator, and the excavator includes above-mentioned swing arm.
The present invention also provides a kind of manufacturing method of swing arm, the manufacturing method the following steps are included: S1, on partition plus
Work goes out mounting hole；S2, processed on the upper cover plate, lower cover plate and web of swing arm main body it is corresponding with the mounting hole
Through-hole；S3, the mounting hole and the through-hole are passed through using fastener with by the upper cover plate, the lower cover plate and the abdomen
Plate is all connected to the partition；S4, welding processing will be carried out between the upper cover plate, the lower cover plate and web.
Through the above technical solutions, the wall portion and partition are connected by passing through the fastener of the mounting hole and the through-hole
It connects, due to the presence of partition, above-mentioned this connection type only passes through the connection type of welded connecting relative to wall portion and partition
Speech, can be improved fatigue admissable stress.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the preferred embodiment of swing arm of the invention；
Fig. 2 is the structural schematic diagram of the preferred embodiment of the partition of swing arm of the invention；
Fig. 3 is the right parallax stereogram of Fig. 2；
Fig. 4 is structural schematic diagram of the mounting hole of swing arm of the invention with through-hole when corresponding；
Fig. 5 is the structural schematic diagram that the structure of Fig. 4 is connected by fastener；
Fig. 6 is the structural schematic diagram of the preferred embodiment of excavator of the invention.
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.
As shown in Fig. 1~5, swing arm of the invention includes swing arm main body and partition 10, and swing arm main body has inner cavity and restriction
The wall portion 20 of inner cavity, partition 10 are installed in inner cavity, and partition 10 circumferentially offers mounting hole 11, as shown in figure 4, wall portion 20 is set
It is equipped with through-hole 21 corresponding with mounting hole 11, as shown in figure 5, wall portion 20 and partition 10 are by passing through mounting hole 11 and through-hole 21
Fastener 30 connect.Through the above technical solutions, wall portion 20 and partition 10 pass through the fastening across mounting hole 11 and through-hole 21
Part 30 connects, and due to the presence of partition 10, above-mentioned this connection type only passes through welded connecting relative to wall portion 20 and partition 10
Connection type for, can enhance swing arm entirety intensity while, raising fatigue admissable stress.
It is to be appreciated that the form of the mounting hole 11 of partition 10 can be designed as it is a variety of, for example, in some embodiments
In, partition 10 is arranged perpendicular to the wall portion 20 being in contact with it, and mounting hole 11 can be the blind hole opened up towards wall portion 20, that is, every
Plate 10 can be protruded into mounting hole 11 across through-hole 21 by swell fixture and realize connection with wall portion 20.In order to further facilitate
The installation of partition 10 and wall portion 20, in a preferred embodiment of the invention, partition 10 includes and the peace disposed in parallel of wall portion 20
Loading board portion, the perforation of mounting hole 11 are arranged in mounting plate portion.That is, mounting plate portion is parallel to the wall being in contact with partition 10
The inner surface in portion 20 is arranged, and the perforation of mounting hole 11 is arranged in mounting plate portion, this installs partition 10 with wall portion 20
When, it can be used that fastener 30 passes outwards through through-hole 21 from the inside of wall portion 20 and mounting hole 11 is fixed, be not limited solely to
Fastener 30 passes inwardly through through-hole 21 from the outside of wall portion 20 and mounting hole 11 is fixed.
In some installation operating conditions, it has not been convenient to carry out the fixation of fastener 30 outward from the inside of wall portion 20, can only use
The mode for being inwardly inserted into fastener 30 from the outside of wall portion 20 and being fixed, it is therefore preferred that swing arm includes multiple fasteners
30, wherein at least one fastener 30 is self-plugging rivet.When partition 10 and wall portion 20 being fixed using self-plugging rivet, pass through
Staking rob manually, electrically can by self-plugging rivet pass through through-hole 21 and mounting hole 11, later start hand riveter make self-plugging rivet by
Power deforms, and partition 10 and wall portion 20 is fixed.
The tension of self-plugging rivet, anti-deformation are not so good as solid rivet, therefore, in order to improve partition 10 and wall as much as possible
The reliability interconnected of portion 20, it is preferable that at least one fastener 30 in multiple fasteners 30 is solid rivet.It is installing
In the process, first partition 10 and wall portion 20 can be carried out tightly using solid rivet as much as possible in the case where facilitating construction
Gu then using core pulling when that can not continue when the outside of wall portion 20 fastens partition 10 and wall portion 20 using solid rivet
Rivet carries out fastening work.
It should be understood that swing arm main body can be designed as being integrally formed part, such as integrally formed cylinder-like structure, case
Type structure etc., wall portion 20 are then a part of integrated molding part, and in some cases, it transports for convenience, swing arm main body needs
Use assembled structure, for example, swing arm main body includes upper cover plate 201, lower cover plate 202 and web 203, upper cover plate 201, under
Cover board 202 and web 203 surround the box-structure with inner cavity, through-hole 21 be set to upper cover plate 201, lower cover plate 202 and
On web 203.The benefit being arranged in this way is that the plates such as individual upper cover plate 201, lower cover plate 202 and web 203 are compared to one
Body formed cylinder-like structure, box-structure etc. are integrally formed for part, it is easier to be transported, and be saved transportation cost.
It should be understood that cross section respectively can be spliced into using one piece of upper cover plate 201, lower cover plate 202 and web 203
For the box-structure of triangle, and in a preferred embodiment of the invention, using one piece of upper cover plate 201 and one piece of lower cover plate
It is attached between 202 by two blocks of webs 203, to form box-structure of the cross section as quadrangle.The swing arm of this structure
Main body is easier the oil cylinder outside connection, and makes swing arm is whole to have better stability after connecting oil cylinder.
In order to adapt to above-mentioned swing arm main body, as shown in Figures 2 and 3, mounting plate portion includes support plate 103 and along support
Two horizontal parts 101 and two vertical portions 102, horizontal part 101 that the circumferential bending of plate 103 is formed mutually are interconnected with vertical portion 102
It connects to form the frame structure of rectangle, the perforation of mounting hole 11 is arranged on horizontal part 101 and vertical portion 102.That is, two
Horizontal part 101 can be fixed on upper cover plate 201 and lower cover plate 202 by fastener 30 respectively, and two vertical portions 102 can be distinguished
Two blocks of webs 203 are fixed on by fastener 30, so that partition 10 is in the inside of swing arm main body to upper cover plate 201, lower cover
Plate 202 and web 203 provide stable support.
In addition, the partition 10 using above-mentioned form can also be played when being spliced using the swing arm main body of assembly form
The effect of positioning tool: upper cover plate 201, lower cover plate 202 are fixed on to two horizontal parts of partition 10 by fastener 30 respectively
101, then two blocks of webs 203 are fixed on two vertical portions 102 of partition 10 by fastener 30 respectively, upper cover plate can be made
201, lower cover plate 202 and web 203 are spliced to form the box-structure that cross section is rectangle.
In certain embodiments of the present invention, connected between two horizontal parts 101 and two vertical portions 102 by welding
It connects.
And in other embodiments, two horizontal parts 101 and two vertical portions 102 can design integrally formed ring
Shape structure.The benefit being arranged in this way is that integrally formed ring structure has better stability and load performance.
When swing arm main body uses splicing structure, in order to further increase the stability of each component connection, it is preferable that web
Pass through welded connecting between 203 and upper cover plate 201, lower cover plate 202.
When swing arm is longer or needs to have better load performance, further, swing arm includes the length along swing arm main body
Spend multiple partitions 10 of direction setting.That is, multiple partitions 10 are set to swing arm main body by fastener 30, so as to
Enough further increase the fatigue admissable stress of swing arm entirety.
The present invention also provides a kind of manufacturing method of swing arm, manufacturing method the following steps are included:
S1, mounting hole 11 is processed on partition 10；
S2, it is processed on the upper cover plate 201, lower cover plate 202 and web 203 of swing arm main body with mounting hole 11 relatively
The through-hole 21 answered；
S3, mounting hole 11 and through-hole 21 are passed through using fastener 30 with by upper cover plate 201, lower cover plate 202 and web 203
It is all connected to partition 10；
S4, welding processing will be carried out between upper cover plate 201, lower cover plate 202 and web 203.
Benefit using the manufacturing method of swing arm of the invention is that partition 10 can be in the swing arm main body using assembly form
Play the role of positioning tool when being spliced: upper cover plate 201, lower cover plate 202 are fixed on partition by fastener 30 respectively
10 two horizontal parts 101, then two blocks of webs 203 are fixed on two vertical portions 102 of partition 10 by fastener 30 respectively,
Upper cover plate 201, lower cover plate 202 and web 203 can be made to be spliced to form the box-structure of cross section rectangle.To reduce
Dedicated for the cost of positioning tool.
As shown in fig. 6, excavator includes above-mentioned swing arm 1 the present invention also provides a kind of excavator.The excavator due to
Using above-mentioned swing arm, fatigue admissable stress with higher, it is not necessary that upper cover plate 201, lower cover plate 202 and web is truncated
203 can be completed installation, also, the positioning of upper cover plate 201, lower cover plate 202 and web 203 is convenient and efficient, reduces manufacture
Cost.
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
It, can be with various simple variants of the technical solution of the present invention are made, in order to avoid unnecessary in the range of the technology design of invention
It repeats, the invention will not be further described in various possible combinations.But these simple variants and combination equally should be considered as
Content disclosed in this invention, all belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of swing arm, which is characterized in that the swing arm includes swing arm main body and partition (10), and the swing arm main body has inner cavity
With the wall portion (20) for limiting the inner cavity, the partition (10) is installed in the inner cavity, and the partition (10) circumferentially opens up
Have mounting hole (11), the wall portion (20) is provided with through-hole (21) corresponding with the mounting hole (11), the wall portion (20)
It is connect by passing through the mounting hole (11) with the fastener (30) of the through-hole (21) with partition (10).
2. swing arm according to claim 1, which is characterized in that the partition (10) includes sets parallel with the wall portion (20)
The mounting plate portion set, mounting hole (11) perforation are arranged in the mounting plate portion.
3. swing arm according to claim 2, which is characterized in that the swing arm includes multiple fasteners (30), wherein
At least one described fastener (30) is self-plugging rivet.
4. swing arm according to claim 3, which is characterized in that fastener described in wherein at least one (30) is solid riveting
Nail.
5. swing arm according to claim 3, which is characterized in that the swing arm main body includes upper cover plate (201), lower cover plate
(202) and web (203), the upper cover plate (201), the lower cover plate (202) and the web (203) are surrounded with institute
The box-structure of inner cavity is stated, the through-hole (21) is set to the upper cover plate (201), the lower cover plate (202) and the abdomen
On plate (203).
6. swing arm according to claim 5, which is characterized in that the mounting plate portion includes support plate (103) and along institute
State two horizontal parts (101) and two vertical portions (102) that the circumferential bending of support plate (103) is formed, the horizontal part (101)
The frame structure of rectangle is interconnected so as to form with the vertical portion (102), mounting hole (11) perforation is arranged in the water
On flat portion (101) and the vertical portion (102).
7. swing arm according to claim 6, which is characterized in that two horizontal parts (101) and two vertical portions
(102) it is connected between by welding；And/or the web (203) and the upper cover plate (201), the lower cover plate (202) it
Between pass through welded connecting.
8. swing arm according to any one of claims 1-7, which is characterized in that the swing arm includes along the swing arm master
Multiple partitions (10) of the length direction setting of body.
9. a kind of excavator, which is characterized in that the excavator includes swing arm according to any one of claims 8 (1).
10. a kind of manufacturing method of swing arm, which is characterized in that the manufacturing method the following steps are included:
S1, mounting hole (11) are processed on partition (10)；
S2, it is processed and the mounting hole on the upper cover plate (201), lower cover plate (202) and web (203) of swing arm main body
(11) corresponding through-hole (21)；
S3, the mounting hole (11) and the through-hole (21) are passed through using fastener (30) with by the upper cover plate (201), described
Lower cover plate (202) and the web (203) are all connected to the partition (10)；
S4, welding processing will be carried out between the upper cover plate (201), the lower cover plate (202) and web (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431277.4A CN109537656A (en) | 2018-11-26 | 2018-11-26 | Swing arm, the manufacturing method of swing arm and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431277.4A CN109537656A (en) | 2018-11-26 | 2018-11-26 | Swing arm, the manufacturing method of swing arm and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109537656A true CN109537656A (en) | 2019-03-29 |
Family
ID=65851887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811431277.4A Pending CN109537656A (en) | 2018-11-26 | 2018-11-26 | Swing arm, the manufacturing method of swing arm and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109537656A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017106A (en) * | 2019-04-17 | 2019-07-16 | 中联重科股份有限公司 | Mast, rotary drilling rig, the partition for mast and mast manufacturing method |
| CN113133313A (en) * | 2019-10-31 | 2021-07-16 | 株式会社小松制作所 | Frame of work vehicle and work vehicle |
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| JP2002242227A (en) * | 2001-02-15 | 2002-08-28 | Shin Caterpillar Mitsubishi Ltd | Work arm structure for work machine |
| US20140056677A1 (en) * | 2011-04-20 | 2014-02-27 | Hitachi Construction Machinery Co., Ltd. | Boom for construction machine |
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| JP2017066790A (en) * | 2015-09-30 | 2017-04-06 | 株式会社クボタ | Work machine |
| CN106948392A (en) * | 2013-06-28 | 2017-07-14 | 株式会社久保田 | The swing arm and working rig of working rig |
| CN206655259U (en) * | 2017-04-14 | 2017-11-21 | 福建晋工机械有限公司 | The otic placode improved structure of engineering machinery casing |
| CN107675741A (en) * | 2016-08-01 | 2018-02-09 | 卡特彼勒公司 | Link assembly for machine |
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- 2018-11-26 CN CN201811431277.4A patent/CN109537656A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242227A (en) * | 2001-02-15 | 2002-08-28 | Shin Caterpillar Mitsubishi Ltd | Work arm structure for work machine |
| US20140056677A1 (en) * | 2011-04-20 | 2014-02-27 | Hitachi Construction Machinery Co., Ltd. | Boom for construction machine |
| US20150167272A1 (en) * | 2011-09-26 | 2015-06-18 | Caterpillar Inc. | Beam Structure |
| CN106948392A (en) * | 2013-06-28 | 2017-07-14 | 株式会社久保田 | The swing arm and working rig of working rig |
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| CN107675741A (en) * | 2016-08-01 | 2018-02-09 | 卡特彼勒公司 | Link assembly for machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017106A (en) * | 2019-04-17 | 2019-07-16 | 中联重科股份有限公司 | Mast, rotary drilling rig, the partition for mast and mast manufacturing method |
| CN110017106B (en) * | 2019-04-17 | 2020-12-01 | 中联重科股份有限公司 | Mast, rotary drilling rig, partition plate for mast and mast manufacturing method |
| CN113133313A (en) * | 2019-10-31 | 2021-07-16 | 株式会社小松制作所 | Frame of work vehicle and work vehicle |
| US11529997B2 (en) | 2019-10-31 | 2022-12-20 | Komatsu Ltd. | Frame of work vehicle and work vehicle |
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Application publication date: 20190329 |