CN107386345A - Fit structure and excavator at high temperature resistant construction excavator boom front end - Google Patents
Fit structure and excavator at high temperature resistant construction excavator boom front end Download PDFInfo
- Publication number
- CN107386345A CN107386345A CN201710721810.XA CN201710721810A CN107386345A CN 107386345 A CN107386345 A CN 107386345A CN 201710721810 A CN201710721810 A CN 201710721810A CN 107386345 A CN107386345 A CN 107386345A
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- CN
- China
- Prior art keywords
- excavator
- axle sleeve
- high temperature
- temperature resistant
- fit structure
- 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
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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)
- Pivots And Pivotal Connections (AREA)
Abstract
The present invention proposes fit structure and excavator at a kind of high temperature resistant construction excavator boom front end, fit structure includes dipper at excavator high temperature resistant construction excavator boom front end, the front end of dipper offers pilot hole, axle sleeve is equipped with pilot hole, the internal diameter of pilot hole and the external diameter of axle sleeve are interference fitted using H7/u7, bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin is hinged with axle sleeve using H8/f8 gaps to coordinate.Beneficial effects of the present invention：Fit structure at excavator high temperature resistant construction excavator boom front end is applied to excavator to adapt to construction at high temperature, when excavator works under about 120 DEG C of hot environments, the working time that the axle sleeve and bearing pin of dipper front end wear was postponed till 2000 hours by present 700 hours, the service life of part is extended, reduces maintenance cost.
Description
Technical field
The present invention relates to excavator technical field, more particularly to cooperation at a kind of high temperature resistant construction excavator boom front end
Structure and excavator.
Background technology
At present, the environment temperature in steel mill workshop is at 50-70 DEG C, and dust is big, high humidity, main in steel mill workshop to use digging
Pick machine excavates the mineral powder in stewing hole, about 300 DEG C of the temperature of mineral powder, or excavates with the steel in tower destroyer processing crucible
Slag, in this way, making the radiation temperature of excavator boom front end reach about 120 DEG C.As shown in figure 1, existing matching somebody with somebody of irising out of dipper front end
Close in structure 1, sealing ring and axle sleeve on dipper, linkage component use plain edition, sealing ring be easily deformed at high temperature with always
Change, lose sealing function, lubricating grease thinning outflow at high temperature, lubrication disappears.Dust can enter bearing pin and axle sleeve quickly
Between gap, increase and rubbed between bearing pin and axle sleeve, cause premature wear and sintering failure.
The content of the invention
It is an object of the invention to provide fit structure and excavator at a kind of high temperature resistant construction excavator boom front end, solution
Fit structure does not adapt to the technical problem of construction at high temperature at certainly current excavator boom front end.
The present invention provides fit structure at a kind of high temperature resistant construction excavator boom front end, including dipper, the front end of dipper
Pilot hole is offered, axle sleeve, the internal diameter of pilot hole and the external diameter of axle sleeve are equipped with pilot hole and is interference fitted using H7/u7, axle
Bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin is hinged with set using H8/f8 gaps to coordinate.
Further, the inner surface of axle sleeve is inlaid with solid graphite lubricant.
Further, axle sleeve is made up of high intensity high-tensile strength brass.
Further, bearing pin is formed from steel.
The present invention also provides a kind of excavator, and the excavator is constructed using above-mentioned high temperature resistant at excavator boom front end
Fit structure.
Compared with prior art, fit structure and excavator have at high temperature resistant of the invention construction excavator boom front end
Following characteristics and advantage：
Fit structure at the high temperature resistant construction excavator boom front end of the present invention, is applied to excavator to adapt to high temperature
Construction, when excavator works under about 120 DEG C of hot environments, working time that the axle sleeve and bearing pin of dipper front end wear by
Present postpones till 2000 hours for 700 hours, extends the service life of part, reduces maintenance cost.
After the embodiment of the present invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is assembling structure at current excavator boom front end；
Fig. 2 is the sectional view of pilot hole and axle sleeve fit structure in the embodiment of the present invention；
Fig. 3 is the sectional view of bottom bracket axle of the embodiment of the present invention and bearing pin fit structure；
Fig. 4 is the sectional view of bottom bracket axle of the embodiment of the present invention；
Wherein, 1, existing fit structure, 2, the front end of dipper, 3, axle sleeve, 4, bearing pin, 5, solid graphite lubricant.
Embodiment
As shown in Figures 2 to 4, the present embodiment provides fit structure at a kind of high temperature resistant construction excavator boom front end, bag
Dipper is included, the front end 2 of dipper offers pilot hole, and axle sleeve 3, the internal diameter of pilot hole and the external diameter of axle sleeve 3 are equipped with pilot hole
It is interference fitted using H7/u7, increases the frictional force of pilot hole and axle sleeve 3, even if the short time loses between axle sleeve 3 and bearing pin 4
The failure altered outside pilot hole will not also occur for lubrication, axle sleeve 3.Bearing pin 4, the internal diameter and bearing pin 4 of axle sleeve 3 are hinged with axle sleeve 3
External diameter using H8/f8 gaps coordinate, high temperature Lower shaft sleeve 3, which prolongs, radially-inwardly to be expanded, and bearing pin 4 prolongs radial outward expansion, due to adopting
With suitable clearance fit relationship, enough gaps after high-temperature expansion therebetween also be present, will not be in contact and kill
Failure, the two smoothly relative motion can be made, improve the reliability at the position and the service life of parts.
At present, the axle sleeve on dipper uses 45# steel, under hot environment lubricating grease volatilization or due to poor sealing reason and
When causing lubrication failure, axle sleeve and bearing pin directly contact, in the presence of impulsive force and inertia friction power, bearing pin and axle sleeve it is hard
To change layer (quenching layer) to wear quickly, the steel bushing and steel shaft of two equivalent materials, iron molecule therebetween can accelerate mutually to move,
Easily it is engaged, even melting is integrated under serious conditions.In the present embodiment, axle sleeve 3 is made up of high intensity high-tensile strength brass, high-strength
The hardness of degree high-tensile strength brass is not less than 255HB, and the inner surface of axle sleeve 3 is inlaid with solid graphite lubricant 5, can be in hot environment
It is lower to realize axle sleeve 3 and the good lubrication of bearing pin 4.Bearing pin 4 is formed from steel, on the basis of cost is reduced, even if in special circumstances
Lower generation lubrication failure, can also avoid the occlusion of axle sleeve 3 and bearing pin 4.
The present embodiment also provides a kind of excavator, is tied using coordinating at above-mentioned high temperature resistant construction excavator boom front end
Structure.
Fit structure at the high temperature resistant construction excavator boom front end of the present embodiment, is applied to excavator, Ke Yishi
Construction at high temperature is answered, when excavator works under about 120 DEG C of hot environments, is persistently added without the axle sleeve to dipper front end and bearing pin
Lubricating grease, the working time that the axle sleeve and bearing pin of dipper front end wear were postponed till 2000 hours by present 700 hours, prolonged
The service life of part has been grown, has reduced maintenance cost.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, it should also belong to the present invention's
Protection domain.
Claims (5)
- A kind of 1. fit structure at high temperature resistant construction excavator boom front end, it is characterised in that：Including dipper, the front end of dipper is opened Provided with pilot hole, axle sleeve, the internal diameter of pilot hole and the external diameter of axle sleeve are equipped with pilot hole and is interference fitted using H7/u7, axle sleeve In be hinged with bearing pin, the internal diameter of axle sleeve and the external diameter of bearing pin using H8/f8 gaps coordinate.
- 2. fit structure at high temperature resistant construction excavator boom front end according to claim 1, it is characterised in that：Axle sleeve Inner surface is inlaid with solid graphite lubricant.
- 3. fit structure at high temperature resistant construction excavator boom front end according to claim 2, it is characterised in that：Axle sleeve by High intensity high-tensile strength brass is made.
- 4. fit structure at high temperature resistant construction excavator boom front end according to claim 3, it is characterised in that：Bearing pin by Steel is made.
- A kind of 5. excavator, it is characterised in that：The excavator is using the high temperature resistant construction described in any one of Claims 1-4 Fit structure at excavator boom front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721810.XA CN107386345A (en) | 2017-08-22 | 2017-08-22 | Fit structure and excavator at high temperature resistant construction excavator boom front end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721810.XA CN107386345A (en) | 2017-08-22 | 2017-08-22 | Fit structure and excavator at high temperature resistant construction excavator boom front end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107386345A true CN107386345A (en) | 2017-11-24 |
Family
ID=60352776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710721810.XA Pending CN107386345A (en) | 2017-08-22 | 2017-08-22 | Fit structure and excavator at high temperature resistant construction excavator boom front end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107386345A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953818U (en) * | 2010-12-20 | 2011-08-31 | 无锡润鹏复合新材料有限公司 | Self-lubricating sliding bearing |
| CN103362154A (en) * | 2013-07-09 | 2013-10-23 | 广西柳工机械股份有限公司 | Loader for shovel-loading of hot slag |
| EP2662597A1 (en) * | 2012-05-08 | 2013-11-13 | VCST Industrial Products BVBA | An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly |
| WO2014065320A1 (en) * | 2012-10-25 | 2014-05-01 | Ntn株式会社 | Support point bearing device for pulley arm |
-
2017
- 2017-08-22 CN CN201710721810.XA patent/CN107386345A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953818U (en) * | 2010-12-20 | 2011-08-31 | 无锡润鹏复合新材料有限公司 | Self-lubricating sliding bearing |
| EP2662597A1 (en) * | 2012-05-08 | 2013-11-13 | VCST Industrial Products BVBA | An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly |
| WO2014065320A1 (en) * | 2012-10-25 | 2014-05-01 | Ntn株式会社 | Support point bearing device for pulley arm |
| CN103362154A (en) * | 2013-07-09 | 2013-10-23 | 广西柳工机械股份有限公司 | Loader for shovel-loading of hot slag |
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Legal Events
| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
|
| RJ01 | Rejection of invention patent application after publication |