CN2128981Y - Improved base bearing cover for 492Q type gasloine engine - Google Patents
Improved base bearing cover for 492Q type gasloine engine Download PDFInfo
- Publication number
- CN2128981Y CN2128981Y CN 92230219 CN92230219U CN2128981Y CN 2128981 Y CN2128981 Y CN 2128981Y CN 92230219 CN92230219 CN 92230219 CN 92230219 U CN92230219 U CN 92230219U CN 2128981 Y CN2128981 Y CN 2128981Y
- Authority
- CN
- China
- Prior art keywords
- cover
- base bearing
- utility
- model
- main bearing
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to an improved base bearing cover for 492Q type gasoline engines. The utility model is formed by that a cover part is clamped between two symmetrical bolt holder parts respectively provided with a through hole to be combined into a whole, and planes of the outer ends of the bolt holder parts 1 and the outer circle of the cover part 2 are combined by a circular arc surface structure 3. The utility model can eliminate the stress concentration critical section formed by the combining site of the planes of the outer ends of the bolt holders and the outer circle of the cover body and the crank centre, and the life of workpieces is enhanced. The improved base bearing cover is made of ductile cast iron and can maintain the matching clearance of a main bearing journal and a bearing shell of a crankshaft between 0.02 and 0.05 millimetre, reduce the operational deformation of the base bearing cover and the high-temperature looseness of the bearing shell and enhance the starting function of the integral engine at low temperature.
Description
The utility model relates to the improvement to the main bearing cap of existing petrol engine, the improved main bearing cap of particularly a kind of 492Q petrol engine.
In the existing known 492Q petrol engine manufacturing technology, between the main journal of bent axle and the main bearing cap bearing shell is housed, the main bearing cap that will make by forging aluminium alloy (LY11) with bolt and connect as one by the cylinder body that cast aluminium alloy is made.The structure Mining of main bearing cap is the angle of cut with bolt block outer Transverse plane partly substantially with the cylindrical of cap portion and combines.The deficiency of this spline structure is: (1) forms the dangerous section that two stress are concentrated between said binding site and crankshaft center, makes main bearing cap be easy to fracture; (2) thermal expansion coefficient of material therefor, distortion can have a strong impact on the apolegamy gap between crankshaft main journal and bearing shell greatly in the hot operation, and the cold-starting sexual function that influences complete machine; (3) manufacture cost height.
The purpose of this utility model is the deficiency that will overcome known technology, and a kind of main bearing cap of improved 492Q petrol engine is provided.
The purpose of this utility model is such realization: the outer Transverse plane of bolt block part combines formation with the cylindrical of cap portion with the arc surface structure.
The cylindrical of said cap portion, its radius can be one of them of 47-51 millimeter.
Said arc surface structure, its radius can be one of them of 3-7 millimeter.
Main bearing cap is to make with ductile cast iron material.
Advantage of the present utility model: can eliminate the stress that forms between the binding site of outer Transverse plane of bolt block and lid cylindrical and crankshaft center and concentrate dangerous section, improve parts life-span; The improvement of structure and the Mining that adapts with it make with ductile cast iron material, can make the apolegamy gap of crankshaft main journal and bearing shell remain on the 0.02-0.05 millimeter, it is loosening to reduce main bearing cap work distortion and bush high-temperature, and the cold-starting sexual function that improves complete machine; Only spray can be saved manufacture cost 60-80%.
Description of drawings:
Fig. 1 is the plan view of the improved main bearing cap of 492Q petrol engine.
Describe details and working condition in detail below in conjunction with Fig. 1 according to the concrete device that the utility model proposes.
This main bearing cap is to select the spray of spheroidal graphite cast iron, carries out machining and makes.It comprises two bolt block parts 1 of symmetry, is shaped on a through hole 1a who supplies connecting bolt to pass separately, and is provided with outer Transverse plane 1b.Clip cap portion 2 between them, and be combined into as a whole.The outer Transverse plane 1b of bolt block part combines with arc surface structure 3 with the cylindrical of cap portion, and radius of arc can be one of them of 3-7 millimeter.The cylindrical of said cap portion 2, its radius can be the 47-51 millimeters.
Also be noted that the suitable radius of curvature that has strengthened the cylindrical of cap portion, and height of contour reduces 5 millimeters, be intended to improve this part intensity.In right boring during (partly) hole, should slightly increase the manufacturing tolerances of it and associated part (not shown crankshaft main journal, bearing shell) thereof.
Work and utilize situation, plant the connecting bolt of mariages hair style on the cylinder body, the main journal of bent axle is equipped with bearing shell outward.According to corresponding position the through hole 1a of this main bearing cap is passed connecting bolt, screw, pressing bearing shell, connect as one with cylinder body with nut.
People can imagine from described, and this structural design and the Mining that adapts make with spheroidal graphite cast iron, because the thermal expansion coefficient of ductile cast iron material and distortion are all less than forging aluminium alloy, so can realize said technique effect in the aforementioned advantages fully.
Claims (4)
1, the improved main bearing cap of a kind of 492Q petrol engine, by at two of symmetry and respectively be shaped between the bolt block part of a through hole, clip cap portion and be combined into whole the composition, the outer Transverse plane (1b) that it is characterized in that bolt block part (1) and the cylindrical of cap portion (2) are with arc surface structure (3) formation that combines.
2, main bearing cap according to claim 1 is characterized in that the cylindrical of said cap portion (2), and its radius can be one of them of 47-51 millimeter.
3, main bearing cap according to claim 1 is characterized in that said arc surface structure (3), and its radius can be one of them of 3-7 millimeter.
4, main bearing cap according to claim 1 is characterized in that it being to make with ductile cast iron material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92230219 CN2128981Y (en) | 1992-08-14 | 1992-08-14 | Improved base bearing cover for 492Q type gasloine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92230219 CN2128981Y (en) | 1992-08-14 | 1992-08-14 | Improved base bearing cover for 492Q type gasloine engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2128981Y true CN2128981Y (en) | 1993-03-31 |
Family
ID=33773395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92230219 Expired - Fee Related CN2128981Y (en) | 1992-08-14 | 1992-08-14 | Improved base bearing cover for 492Q type gasloine engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2128981Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339971A (en) * | 2018-12-10 | 2019-02-15 | 广西玉柴机器股份有限公司 | Laser hardens main beating cap and its manufacturing method |
-
1992
- 1992-08-14 CN CN 92230219 patent/CN2128981Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339971A (en) * | 2018-12-10 | 2019-02-15 | 广西玉柴机器股份有限公司 | Laser hardens main beating cap and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |