CN214464573U - Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block - Google Patents
Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block Download PDFInfo
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- CN214464573U CN214464573U CN202120369132.7U CN202120369132U CN214464573U CN 214464573 U CN214464573 U CN 214464573U CN 202120369132 U CN202120369132 U CN 202120369132U CN 214464573 U CN214464573 U CN 214464573U
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- main bearing
- bearing seat
- fillet
- cylinder block
- bearing cap
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses an improve structure of cylinder block main bearing seat fillet fatigue factor of safety, including cylinder block main bearing seat, be equipped with main bearing cap installation face and main bearing cap side locating surface on the cylinder block main bearing seat, be equipped with the main bearing seat fillet between main bearing cap installation face and the main bearing cap side locating surface, the main bearing seat fillet includes circular arc section and straightway, and the main bearing cap side locating surface is connected to the circular arc section, and the main bearing cap installation face is connected to the straightway. The utility model discloses an improve cylinder block main bearing seat fillet fatigue safety coefficient's structure need not increase the main bearing seat wall thickness, can improve main bearing seat fillet stress concentration, reduces main bearing seat fillet stress, improves main bearing seat fillet fatigue safety coefficient, improves the reliability of engine.
Description
Technical Field
The utility model relates to the technical field of engines, especially, relate to an improve structure of cylinder block main bearing seat fillet fatigue factor of safety.
Background
In order to meet the national six-emission regulation, the current engine generally adopts higher oil injection pressure, the in-cylinder gas explosion pressure is higher, and the load borne by a cylinder block is also higher. For a cylinder body, a main bearing seat is a main stressed structure, in the working process of an engine, the pressure of gas in a cylinder is transmitted to a crankshaft through a piston connecting rod, the crankshaft is installed on the main bearing seat through a main bearing cover and a main bearing bolt, so that the load acting on the crankshaft is transmitted to the main bearing seat through the main bearing bolt, in the working process of the engine, the main bearing seat continuously bears alternating load, the stress of a transitional part between the installation surface of the main bearing cover and a side positioning surface on the main bearing seat is large, in order to reduce stress concentration and improve fatigue safety factor, a fillet is machined in a common method and is called as a main bearing seat fillet, the fillet is generally a circular arc with a fixed fillet size, but the fillet is not designed with an optimal structure, and if the load is overlarge, the fillet of the main bearing seat can crack. The current effective improvement is to increase the main bearing housing wall thickness, which increases the main bearing housing fillet fatigue safety factor, but this results in increased cost and excessive engine mass. Under the condition that the wall thickness of the main bearing seat is constant, how to reduce the fillet stress of the main bearing seat and improve the fatigue safety coefficient is a new challenge.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an improve structure of cylinder block main bearing seat fillet fatigue factor of safety need not increase the main bearing seat wall thickness, can improve main bearing seat fillet stress concentration, reduces main bearing seat fillet stress, improves main bearing seat fillet fatigue factor of safety, improves the reliability of engine.
The utility model discloses take following technical scheme to realize above-mentioned purpose:
the utility model provides an improve structure of cylinder block main bearing seat fillet fatigue factor of safety, includes cylinder block main bearing seat, is equipped with main bearing cap installation face and main bearing cap side locating surface on the cylinder block main bearing seat, is equipped with the main bearing seat fillet between main bearing cap installation face and the main bearing cap side locating surface, and the main bearing seat fillet includes circular arc section and straightway, and the main bearing cap side locating surface is connected to the circular arc section, and the main bearing cap installation face is connected to the straightway.
Preferably, the main bearing cap mounting surface and the main bearing cap side locating surface are perpendicular.
Preferably, the main bearing cap mounting face is parallel to a horizontal plane.
The utility model has the advantages that:
the utility model discloses an improve structure of cylinder block main bearing seat fillet fatigue factor of safety forms through machining, simple structure, and the processing cost is low, need not increase the main bearing seat wall thickness, establishes the main bearing seat fillet into the circular arc section and the straightway that are connected, and the main bearing cap side locating surface is connected to the circular arc section, and the main bearing cap installation face is connected to the straightway, can improve main bearing seat fillet stress concentration, reduces main bearing seat fillet stress, improves main bearing seat fillet fatigue factor of safety, improves the reliability of engine.
Drawings
Fig. 1 is a schematic structural diagram of a structure for improving the fillet fatigue safety factor of a main bearing seat of a cylinder block according to an embodiment of the present invention;
fig. 2 is a partial enlarged view of a structure for improving the fillet fatigue safety factor of a main bearing seat of a cylinder block according to an embodiment of the present invention;
fig. 3 is a partial enlarged view of a fillet of a conventional main bearing housing of a cylinder block.
In the figure, 1-a main bearing seat of a cylinder body, 2-a fillet of the main bearing seat, 3-a mounting surface of a main bearing cover, 4-a side positioning surface of the main bearing cover, 11-a circular arc section and 12-a straight line section.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1-3 and the detailed description thereof.
Please refer to fig. 1 and fig. 2 simultaneously, the present embodiment provides a structure for improving the fatigue safety coefficient of a main bearing seat fillet of a cylinder block, including a main bearing seat 1 of the cylinder block, a main bearing cap mounting surface 3 and a main bearing cap side positioning surface 4 are arranged on the main bearing seat 1 of the cylinder block, a main bearing seat fillet 2 is arranged between the main bearing cap mounting surface 3 and the main bearing cap side positioning surface 4, the main bearing seat fillet 2 includes an arc section 11 and a straight line section 12, the arc section 11 is connected to the main bearing cap side positioning surface 4, and the straight line section 12 is connected to the main bearing cap mounting surface 3.
Referring to fig. 3, current main bearing seat fillet comprises one section circular arc 21 of fixed size, and the position 22 that is close to 3 one sides of main bearing installation face on the one side so that the position that stress is the biggest in the middle of the circular arc, the utility model discloses an improve structure of cylinder block main bearing seat fillet fatigue safety coefficient changes this one section circular arc into circular arc section 11 and straightway 12, and circular arc section 11 and straightway 12 smooth transition, greatly reduced can be concentrated to stress to effectively reduce main bearing seat fillet 2's stress, improve main bearing seat fillet 2's fatigue safety coefficient.
In the present embodiment, the main bearing housing fillet 2 is formed by machining, and the main bearing housing fillet is simple in structure, low in machining cost, and does not require an increase in the main bearing housing wall thickness.
Referring again to fig. 2, in the present embodiment, the main bearing cap mounting surface 3 and the main bearing cap side positioning surface 4 are perpendicular. The main bearing cover mounting surface 3 is parallel to the horizontal plane, so that the main bearing cover mounting surface 3 and the straight line section 12 are in the same horizontal plane when connected, and stress concentration is reduced more favorably.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. The utility model provides an improve structure of cylinder block main bearing seat fillet fatigue factor of safety, a serial communication port, including cylinder block main bearing seat (1), be equipped with main bearing cap installation face (3) and main bearing cap side locating surface (4) on cylinder block main bearing seat (1), be equipped with main bearing seat fillet (2) between main bearing cap installation face (3) and main bearing cap side locating surface (4), main bearing seat fillet (2) include circular arc section (11) and straightway (12), main bearing cap side locating surface (4) are connected in circular arc section (11), main bearing cap installation face (3) is connected in straightway (12).
2. The structure for improving the fillet fatigue safety factor of the main bearing seat of the cylinder block as recited in claim 1, wherein the main bearing cap mounting surface (3) and the main bearing cap side positioning surface (4) are perpendicular.
3. The structure for improving the fillet fatigue safety factor of the main bearing seats of the cylinder block according to claim 1, wherein the main bearing cap mounting surface (3) is parallel to a horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120369132.7U CN214464573U (en) | 2021-02-09 | 2021-02-09 | Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120369132.7U CN214464573U (en) | 2021-02-09 | 2021-02-09 | Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464573U true CN214464573U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120369132.7U Active CN214464573U (en) | 2021-02-09 | 2021-02-09 | Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block |
Country Status (1)
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| CN (1) | CN214464573U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814799A (en) * | 2021-02-09 | 2021-05-18 | 广西玉柴机器股份有限公司 | Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block |
-
2021
- 2021-02-09 CN CN202120369132.7U patent/CN214464573U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814799A (en) * | 2021-02-09 | 2021-05-18 | 广西玉柴机器股份有限公司 | Structure for improving fillet fatigue safety coefficient of main bearing seat of cylinder block |
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