CN102416551A - Assembly method of excavator structural member steel jacket - Google Patents
Assembly method of excavator structural member steel jacket Download PDFInfo
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- CN102416551A CN102416551A CN2011102643327A CN201110264332A CN102416551A CN 102416551 A CN102416551 A CN 102416551A CN 2011102643327 A CN2011102643327 A CN 2011102643327A CN 201110264332 A CN201110264332 A CN 201110264332A CN 102416551 A CN102416551 A CN 102416551A
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- structural element
- steel bushing
- digging machine
- machine structural
- assembly method
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Abstract
The invention provides an assembly method of an excavator structural member steel jacket, which is characterized by comprising the steps that: firstly, the excavator structural member steel jacket is cooled, then is taken out, and is quickly pressed into an axis pin hole position of an excavator structural member through a press or a steel jacket assembly fixture. The assembly method of the excavator structural member steel jacket not only can improve the assembly speed and the assembly quality, but also can avoid the losses of the steel jacket and the inner wall of the axis pin hole position of the structural member, and furthermore, the axis pin hole position is prevented from frequent malfunction during the use process of an excavator.
Description
Technical field
The present invention relates to a kind of assembly method of digging machine structural element steel bushing, be applicable to assembling than macrostructure spare pin shaft hole position steel bushing.
Background technology
The assembly method of traditional digging machine structural element steel bushing be the working pressure machine with in the direct pressing structure spare pin-and-hole of steel bushing, or knock in steel bushing to the structural member pin shaft hole position with iron hammer; This assembling was both lost time, and had caused the severe attrition of steel bushing and structural member pin shaft hole position inwall again, finally caused excavator in use frequently to break down at the pin shaft hole position.For this reason, the needs design is a kind of can improve the assembly method that assembling speed can improve the digging machine structural element steel bushing of assembly quality again.
Summary of the invention
The invention provides and a kind ofly can improve the assembly method that assembling speed can improve the digging machine structural element steel bushing of assembly quality again.
In order to achieve the above object; The invention provides a kind of assembly method of digging machine structural element steel bushing; It is characterized in that; Comprise: at first, then the digging machine structural element steel bushing is taken out, it is press-fited fast to digging machine structural element pin shaft hole position with forcing press or steel bushing assembly tooling with the cooling of digging machine structural element steel bushing.
Preferably, the chilling temperature t of described digging machine structural element steel bushing
cFor:
Wherein, e
ItBe steel bushing external diameter shrinkage amount, equal the magnitude of interference between digging machine structural element cylinder sleeve external diameter and the digging machine structural element bearing pin aperture and assemble the minimum clearance sum between back digging machine structural element cylinder sleeve and the digging machine structural element pin shaft hole inwall that unit is mm; α is the linear expansion coefficient of digging machine structural element cylinder sleeve material therefor, and unit is 1/ ℃, d
fThe diameter of steel bushing during for assembling, unit is mm, t
cUnit be ℃.
Preferably, be 30min the shortest cool time of described digging machine structural element steel bushing.
The present invention can improve assembling speed can improve assembly quality again, can avoid the loss of steel bushing and structural member pin shaft hole position inwall, and then avoid excavator in use frequently to break down at the pin shaft hole position.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
1, calculates the chilling temperature t of digging machine structural element steel bushing
c:
Wherein, steel bushing external diameter shrinkage amount e
ItEqual the magnitude of interference (0.068mm) between digging machine structural element steel bushing external diameter and the digging machine structural element bearing pin aperture and assemble minimum clearance (0mm) sum between back digging machine structural element steel bushing and the digging machine structural element pin shaft hole inwall; Value is 0.068mm, and the linear expansion coefficient α of digging machine structural element steel bushing material therefor is-8.5 * 10
-6/ ℃, the diameter d of steel bushing during assembling
fBe 100mm, then t
cBe-80 ℃.
2, refrigerator temperature is set to steel bushing chilling temperature t
c, digging machine structural element steel bushing to be installed is put to refrigerator, take out after reaching 30min cool time, the operator need dress the antifreezing protection apparatus before taking out, and skin not directly contacts the low temperature steel bushing, and there is thick white person on the steel bushing surface, can not assemble, and needs cooling again.Steel bushing evenly is applied to butter on the inwall of structural member pin shaft hole position before taking out.Steel bushing takes out the back assembling should be rapid, should in 2min, accomplish, and avoiding at room temperature, the steel bushing external diameter recovers.
3, select respective openings cover and fairlead, successively with fairlead, the steel bushing press machine draw bar of packing into; Note the fairlead direction; Make fairlead and steel bushing abutting end towards steel bushing, steel bushing has openend towards structural member pin shaft hole position, and the press machine draw bar level is passed structural member bearing pin endoporus; Opening sleeve is filled to the press machine draw bar front end, and opening sleeve and pin-and-hole abutting end are towards pin-and-hole; The adjustment pull bar, guarantee press machine draw bar basically with the pin shaft hole bit parallel with concentric; The operating pressure machine controller " on " button, shrink pull bar, steel bushing is depressed in the pin shaft hole position.After steel bushing was pressed into, operating pressure machine controller D score button was return pull bar, removes the under shed cover, and pull bar is taken out from the pin shaft hole position.
Claims (3)
1. the assembly method of a digging machine structural element steel bushing; It is characterized in that; Comprise: at first, then the digging machine structural element steel bushing is taken out, it is press-fited fast to digging machine structural element pin shaft hole position with forcing press or steel bushing assembly tooling with the cooling of digging machine structural element steel bushing.
2. the assembly method of digging machine structural element steel bushing as claimed in claim 1 is characterized in that, the chilling temperature t of described digging machine structural element steel bushing
cFor:
Wherein, e
ItBe steel bushing external diameter shrinkage amount, equal the magnitude of interference between digging machine structural element cylinder sleeve external diameter and the digging machine structural element bearing pin aperture and assemble the minimum clearance sum between back digging machine structural element cylinder sleeve and the digging machine structural element pin shaft hole inwall that unit is mm; α is the linear expansion coefficient of digging machine structural element cylinder sleeve material therefor, and unit is 1/ ℃, d
fThe diameter of steel bushing during for assembling, unit is mm, t
cUnit be ℃.
3. the assembly method of digging machine structural element steel bushing as claimed in claim 1 is characterized in that, be 30min the shortest cool time of described digging machine structural element steel bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102643327A CN102416551A (en) | 2011-09-08 | 2011-09-08 | Assembly method of excavator structural member steel jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102643327A CN102416551A (en) | 2011-09-08 | 2011-09-08 | Assembly method of excavator structural member steel jacket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102416551A true CN102416551A (en) | 2012-04-18 |
Family
ID=45941335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102643327A Pending CN102416551A (en) | 2011-09-08 | 2011-09-08 | Assembly method of excavator structural member steel jacket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102416551A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0267800A1 (en) * | 1986-11-14 | 1988-05-18 | Ford Motor Company Limited | Method of assembling components |
| CN101362274A (en) * | 2008-08-08 | 2009-02-11 | 胡淑英 | Connection method of transmission axle for precise transmission and bearing support part |
| CN101658998A (en) * | 2009-09-29 | 2010-03-03 | 湖南汉升机器制造有限公司 | Assembly method adopting interference fit rigid connection |
| CN102150350A (en) * | 2008-09-12 | 2011-08-10 | 可控动力技术有限公司 | Apparatus and manufacturing process for an electrical machine |
-
2011
- 2011-09-08 CN CN2011102643327A patent/CN102416551A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0267800A1 (en) * | 1986-11-14 | 1988-05-18 | Ford Motor Company Limited | Method of assembling components |
| CN101362274A (en) * | 2008-08-08 | 2009-02-11 | 胡淑英 | Connection method of transmission axle for precise transmission and bearing support part |
| CN102150350A (en) * | 2008-09-12 | 2011-08-10 | 可控动力技术有限公司 | Apparatus and manufacturing process for an electrical machine |
| CN101658998A (en) * | 2009-09-29 | 2010-03-03 | 湖南汉升机器制造有限公司 | Assembly method adopting interference fit rigid connection |
Non-Patent Citations (4)
| Title |
|---|
| 何博雄: "过盈连接装配工艺的设计计算", 《西安工业学院学报》 * |
| 夏显明: "过盈配合装配措施分析", 《过盈配合装配措施分析》 * |
| 梁培根: "冷装工艺在挖掘机修理中的应用", 《矿山机械》 * |
| 郭连娣: "套与孔的过盈配合装配工艺", 《建筑机械》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120418 |