CN100588845C - Main bearing cover for IC engine - Google Patents
Main bearing cover for IC engine Download PDFInfo
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- CN100588845C CN100588845C CN200510110616A CN200510110616A CN100588845C CN 100588845 C CN100588845 C CN 100588845C CN 200510110616 A CN200510110616 A CN 200510110616A CN 200510110616 A CN200510110616 A CN 200510110616A CN 100588845 C CN100588845 C CN 100588845C
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- main bearing
- engine
- bearing cap
- bearing cover
- cap
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Abstract
The invention discloses a main bearing cap of gas engine, which makes use of connection to connect various bearing caps together so as to form the whole main bearing cap. In the whole main bearing capthe rigidity of main bearing seat of die-casting body is improved greatly. Mechanical deformation, thermal deformation and portrait vibration of body are decreased. The rigidity of main bearing cap,coaxiality and Cylindricity of the hole of main bearing are improved at a great extent so as to improve the pressure-bearing ability of bearing and decrease the abrasion of friction pair. In addition,back oil seal seat is cast on the main bearing cap and a boss is cast on the lower of main bearing cap to install filtering so as to decrease the parts number of gas engine, decrease mechanical machining faces, decrease the production cost and improve the production efficiency.
Description
Technical field
The present invention relates to a kind of main bearing cover for IC engine.
Background technique
The body of internal-combustion engine constitutes the skeleton of machine, and all main parts size of internal-combustion engine and annex are installed inside and outside the body.In order to guarantee the reliability and the durability of major part work such as piston, connecting rod, bent axle, the relative position between them must strictly keep.Body bears very complicated load when internal combustion engine operation: each gas in the jar is to the gaseous-pressure of cylinder surface, through the lateral force of piston action in each cylinder wall, is added in power on each main bearing through bent axle, and support is to the reaction of bearing and the countertorque of internal-combustion engine.The size of these power, direction constantly change with operating mode and crank angle, and the point of action of some power is also in continuous variation.In addition, even when internal-combustion engine does not turn round, each cylinder head bolt, Main bearing bolt also make fastened part stressed.More than various power and moment make the body each several part be subjected to the tension and compression bending of alternation, produce the ess-strain of more complicated.Therefore the structural design of internal-combustion engine must guarantee that it has enough strength and stiffness, excessive distortion can not occur.
Load on the internal combustion engine crankshaft bearing has alternation and impact, and maximal condition specific pressure (being the load on the unit projected bearing area) can reach 35～50Mpa, and operating temperature can reach 150 ℃, so should keep mechanical property under operating temperature.Improve the bearing capacity of bearing, just must guarantee the minimum oil film thickness (promptly not taking place to reduce the bearing play as far as possible under the direct situation about contacting of axle journal and bearing) of engine bearing.This just requires to improve the coaxality and the cylindricity of each main bearing hole, improves structural rigidity, reduces mechanically deformation and thermal distortion etc.
At existing motor, the sealing of its rear end adopts a Rear oil seal seat to be used to seal crankshaft rear end basically, as shown in Figure 8.
The bent axle of existing internal-combustion engine all adopts full supporting structure, and main bearing is promptly all arranged between each crank throw, and generally each main bearing all adopts an independent main bearing cap that bent axle is fixed on the body, promptly adopts distributing main bearing cap structure.Fig. 1 is a kind of traditional main bearing cap structure, and it comprises two bolt block parts 10, and through finished through hole 101, is provided with working surface 102 at the lower surface of main bearing cap, and the main bearing seat on itself and the engine body fits.The cap portion 20 that clips between them.
The rigidity of this main bearing cap and the coaxality of main bearing hole and cylindricity are not enough, and machining surface is many, have increased the engine production manufacture cost.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of novel integrated type main bearing cover for IC engine is provided, thereby improve the rigidity of main bearing cap and the coaxality and the cylindricity of main bearing hole, and reduce the manufacturing cost of motor.
In the explanation to technical solution of the present invention, described " front end ", " rear end " are consistent with the front and back ends direction of bent axle, are that front end, flywheel end are the rear end with the vibration damper end generally, are the technical term of related domain.
The objective of the invention is to be achieved through the following technical solutions:
A kind of main bearing cover for IC engine comprises at least two bearing caps, respectively is being provided with joint between this bearing cap.
Wherein, this joint is the arc connecting wall, and with respectively this bearing cap is one-body molded, is provided with stiffening rib at the junction point of this arc connecting wall and this bearing cap.And, on this arc connecting wall, be provided with the draining hole.
Be provided with the Rear oil seal boss in the rear end of this main bearing cover for IC engine, it is semicircle.
Be provided with a fuel filter boss in the bottom surface of this main bearing cover for IC engine, which is provided with tapped hole.And, also be provided with a plurality of recesses in the bottom surface of this main bearing cover for IC engine.
In addition, be provided with two bolt holes at this bearing cap respectively, its top is provided with pin-and-hole.Forward and backward at the bearing cap that crankshaft thrust collar is installed respectively is provided with the thrust plate boss, which is provided with the thrust film trap.
Positive progressive effect of the present invention is:
Die casting body main bearing seat place rigidity is improved greatly, reduced mechanically deformation and thermal distortion, reduce the extensional vibration of body;
Improved the rigidity of main bearing cap and the coaxality and the cylindricity of main bearing hole to a great extent, can improve bearing pressure energy power, the secondary wearing and tearing of reducing friction;
The Rear oil seal seat is cast on the main bearing cap and casts out a boss in the lower end surface of this main bearing cap be used to install fuel filter, reduced the quantity of gas engine part, reduced machined surface, reduced manufacturing cost, improved manufacturing efficiency.
Description of drawings
Fig. 1 is the schematic representation of existing main bearing cap.
Fig. 2 is the stereogram of the embodiment of the invention 1.
Fig. 3 is the plan view of the embodiment of the invention 1.
Fig. 4 is the worm's eye view of the embodiment of the invention 1.
Fig. 5 is the right side view of the embodiment of the invention 1.
Fig. 6 is the front end view of the embodiment of the invention 1.
Fig. 7 is the rear end view of the embodiment of the invention 1.
Fig. 8 is the schematic representation of existing Rear oil seal seat.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technological scheme of the present invention in detail.
Shown in Fig. 2-7, a kind of main bearing cover for IC engine, its profile is a tooth-shape structure, four arc connecting walls 1 link together five bearing caps 2, this bearing cap 2 is connected to each other, forms an integral body, and this arc connecting wall 1 is with respectively this bearing cap 2 is one-body molded.
All use stiffening rib 5 to strengthen at arc connecting wall 1 with the junction that is connected of bearing cap 2, make its rigidity improve greatly.
Owing to adopted the joint of arcuate structure, in engine working process, the machine oil that flows down from bent axle can accumulate on this arc connecting wall 1, can not be back to timely in the oil sump, on each arc connecting wall, make a draining hole 11 like this, to guarantee that machine oil can flow back in the oil sump rapidly.
On the rear end of this main bearing cap, directly cast out a semicircular boss 3, shown in Fig. 2-7, be used to install Rear oil seal, so not only reduced the quantity of gas engine part, also reduced the machining plane accordingly,, improved manufacturing efficiency from having lowered manufacturing cost to a great extent.
Shown in Fig. 4-7, on the bottom surface of this main bearing cap, made a columniform fuel filter boss 4, process a tapped hole thereon, be used for fuel filter is installed in this boss by bolt.
In order to alleviate the weight of this main bearing cap, and strengthen its rigidity, be provided with some recesses 6 in its bottom.According to different requirements, as size, weight and intensity etc., this recess 6 can be located at the diverse location of bottom, also can have different shapes.
The semicircle recessed main bearing hole that lower bearing is installed is located at respectively on this bearing cap 2, during installation, respectively the upper surface 21 of this bearing portion and the main bearing seat on the engine body (figure does not show) fit, utilize Main bearing bolt (figure do not show) thus passing two bolt holes 22 that are located on this bearing cap respectively tightens together main bearing cap and main bearing seat, respectively this bolt hole 22 is through to its end face from the bottom of bearing cap.This bolt hole 22 can be directly to cast out to come in casting process, does not need to carry out machining and just can directly use.
Processed one section pin-and-hole 221 at the top of each bolt hole 22, can obtain this pin-and-hole 221 by the method for reaming, it is used for the installing and locating pin, as shown in Figure 6.Engine crankshaft bearing is under the load effect of alternation and impact, and main bearing seat deforms easily, will influence the proper functioning of bearing like this, stings easily watt and weares and teares, and can not guarantee the requirement of minimum oil film thickness.By the installing and locating pin, just can prevent the excessive deformation of bearing on the semi circular surface direction, guarantee that bearing satisfies the requirement of minimum oil film thickness in engine working process, improve the life-span of bearing.
As shown in Figure 3,, on former and later two sides of the bearing cap that crankshaft thrust collar is installed, cast out thrust plate boss 23 respectively, on thrust plate boss 23, process the thrust film trap and be used for the stop crankshaft thrust collar in order not destroy the consistency of bearing cover portion surface.
The described main bearing cap of present embodiment can be used for the in-line four cylinder motor.
Present embodiment (figure does not show) is with the different of embodiment 1: an above-mentioned arc connecting wall 1 is only arranged, and it links together two bearing caps 2, forms an integral body.The structure of present embodiment remaining part all can be with reference to embodiment 1.
The described main bearing cap of present embodiment can be used for single-cylinder engine.
In the various embodiments described above, joint can adopt any structure form according to actual needs, is not limited to described arc connecting wall, and this bolt hole also can utilize boring processing, and other parts also can change as required.
To those skilled in the art, main bearing cap disclosed in this invention obviously can be used for in-line arrangement, V-type and the opposed engine of any cylinder number.As space is limited, no longer above-mentioned mode of execution is illustrated one by one at this.
Claims (8)
1, a kind of main bearing cover for IC engine, it is characterized in that this main bearing cover for IC engine comprises at least two bearing caps, respectively be provided with joint between this bearing cap, the bottom surface of this main bearing cover for IC engine is provided with a fuel filter boss, and this fuel filter boss is provided with tapped hole.
2, main bearing cover for IC engine according to claim 1 is characterized in that, this joint is the arc connecting wall, and with respectively this bearing cap is one-body molded, is provided with stiffening rib at the junction point of this arc connecting wall and this bearing cap.
3, main bearing cover for IC engine according to claim 2 is characterized in that, is provided with the draining hole on this arc connecting wall.
4, main bearing cover for IC engine according to claim 1 is characterized in that, is provided with the Rear oil seal boss in the rear end of this main bearing cover for IC engine, and this Rear oil seal boss is semicircle.
5, main bearing cover for IC engine according to claim 1 is characterized in that, the bottom surface of this main bearing cover for IC engine is provided with a plurality of recesses.
6, main bearing cover for IC engine according to claim 1 or 5 is characterized in that, is provided with two bolt holes at this bearing cap respectively, and the top of this bolt hole is provided with pin-and-hole.
7, main bearing cover for IC engine according to claim 6 is characterized in that, respectively is provided with the thrust plate boss forward and backward of the bearing cap that crankshaft thrust collar is installed, and this thrust plate boss is provided with the thrust film trap.
8, main bearing cover for IC engine according to claim 1 or 5 is characterized in that, respectively is provided with the thrust plate boss forward and backward of the bearing cap that crankshaft thrust collar is installed, and this thrust plate boss is provided with the thrust film trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510110616A CN100588845C (en) | 2005-11-23 | 2005-11-23 | Main bearing cover for IC engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510110616A CN100588845C (en) | 2005-11-23 | 2005-11-23 | Main bearing cover for IC engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1971072A CN1971072A (en) | 2007-05-30 |
| CN100588845C true CN100588845C (en) | 2010-02-10 |
Family
ID=38112028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510110616A Active CN100588845C (en) | 2005-11-23 | 2005-11-23 | Main bearing cover for IC engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100588845C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245595A (en) * | 1977-09-13 | 1981-01-20 | Nissan Motor Company, Limited | Internal combustion engine for motor vehicles |
| US4705092A (en) * | 1985-04-19 | 1987-11-10 | Toyota Jidosha Kabushiki Kaisha | Manufacturing method for an integral type crankshaft bearing cap |
-
2005
- 2005-11-23 CN CN200510110616A patent/CN100588845C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245595A (en) * | 1977-09-13 | 1981-01-20 | Nissan Motor Company, Limited | Internal combustion engine for motor vehicles |
| US4705092A (en) * | 1985-04-19 | 1987-11-10 | Toyota Jidosha Kabushiki Kaisha | Manufacturing method for an integral type crankshaft bearing cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1971072A (en) | 2007-05-30 |
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