CN202001073U - Camshaft bearing cover of small-sized engine - Google Patents
Camshaft bearing cover of small-sized engine Download PDFInfo
- Publication number
- CN202001073U CN202001073U CN201120085409XU CN201120085409U CN202001073U CN 202001073 U CN202001073 U CN 202001073U CN 201120085409X U CN201120085409X U CN 201120085409XU CN 201120085409 U CN201120085409 U CN 201120085409U CN 202001073 U CN202001073 U CN 202001073U
- Authority
- CN
- China
- Prior art keywords
- camshaft
- oil groove
- bearing cover
- bearing cap
- oil
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a camshaft bearing cover of a small-sized engine. An oil groove is designed on the bottom surface of the camshaft bearing cover; the oil groove penetrates through all camshaft holes on the camshaft bearing cover; and the middle of the oil groove is communicated with a main oil gallery hole on a cylinder cover of the engine and is respectively communicated with an oil hole on a camshaft at the positions of the camshaft holes. The camshaft bearing cover of the small-sized engine has the improvements that circular holes which are wider than the oil groove are arranged at the positions right above the shaft holes of the camshaft bearing cover located on the oil groove so as to ensure that the oil hole of the camshaft can be fully contacted with the circular holes of the bearing cover when rotating to the circular holes of the bearing cover, so that the oil supply of the camshaft is ensured.
Description
Technical field
The utility model relates to the lubrication system of mini engine, is specifically related to mini engine camshaft-bearing cap structure.
Background technique
Owing to be subjected to spatial constraints, particularly small displacement engine cylinder head sub-assembly, the space is smaller, when cylinder head sub-assembly structural configuration, and the claimed structure compactness.The main oil gallery of present most cylinder head sub-assemblys is arranged on cylinder head, camshaft-bearing cap, the camshaft, and the oil groove and the camshaft oilhole that utilize camshaft bearing to cover are connected, and realizes camshaft lubrication.Usually, this oil groove is positioned at the camshaft-bearing cap bottom surface, is that a sliver transvers section is about 2.5 * 2.5mm square zanjon, can ensure that like this lubricant oil flows usually.For the intensity of camshaft-bearing cap, the oil groove width of camshaft-bearing cap and the degree of depth are unsuitable excessive. about the about 1.5mm of camshaft oilhole size.In order to reduce manufacture cost, camshaft-bearing cap generally adopts low-pressure die casting, and meanwhile, oil groove is casting together also, no longer carries out cutting.In assembly process,, can make the dislocation of camshaft-bearing cap oil groove and camshaft oilhole because the oil groove of camshaft-bearing cap and camshaft casting error add camshaft axial clearance play.If this layout because of component casting, assembly error, causes the dislocation of camshaft-bearing cap oil groove and camshaft oilhole, to camshaft fuel feeding deficiency, influence is to camshaft lubrication.
Summary of the invention
The purpose of this utility model provides a kind of improved camshaft-bearing cap structure, by changing the shape of its oil groove, solution is because of the oil groove and the camshaft casting error of camshaft-bearing cap, add camshaft axial clearance play, can make the oil groove of camshaft-bearing cap and the problem of camshaft oilhole dislocation.
The technical solution of the utility model is as follows:
A kind of mini engine camshaft-bearing cap, in the design of the bottom surface of described camshaft-bearing cap oil groove is arranged, described oil groove runs through all camshaft shaft holes that camshaft bearing covers, in the middle of the described oil groove and the mail gallery holes that cylinder covers be communicated with, and be communicated with oilhole on the camshaft respectively at the camshaft shaft hole place; It is characterized in that: the position is provided with the circular hole greater than the oil groove width directly over the axis hole that is positioned at camshaft-bearing cap on the described oil groove.
The present invention is under the assurance of existing technology and oil groove shape, directly over the axis hole of camshaft-bearing cap, be positioned at the unrefined oil tank neutral position, make the camshaft-bearing cap oil groove add the about 5～7mm of diameter left and right sides circular hole of casting by mould-forming, the degree of depth is consistent with the oil groove degree of depth, when rotating to the shaft-cup circular hole, can fully contact, guarantee the camshaft fuel feeding with assurance camshaft oilhole.Through cae analysis, open round mouth herein, can't influence the bulk strength of shaft-cup.Simultaneously, simple to operate, save material, can not increase operation.
Description of drawings
Fig. 1 cylinder head sub-assembly partial schematic diagram;
Fig. 2 camshaft-bearing cap side view;
Fig. 3 cylinder head sub-assembly partial sectional view.
Embodiment
Further specify structure of the present utility model below in conjunction with accompanying drawing:
Referring to Fig. 1, Fig. 2 and Fig. 3, the main oil gallery of motor is the front end that is arranged in cylinder head 5, by oil groove 7 positions of mail gallery holes 2 arrival camshaft-bearing caps 1, gang up by oil groove 7 and camshaft oilhole 3, lubricated by the hollow oil duct of camshaft 4 to cam shaft diameter.Directly over the axis hole of camshaft-bearing cap 1, be positioned at oil groove 7 neutral positions, the integrated respectively circular hole of having cast 6, about the about 5～7mm of Circularhole diameter, greater than the width of oil groove 7, formed new shape oil groove, when making camshaft oilhole 3 rotate to circular hole 6 positions, increase oilhole 3 and oil groove 7 contact range, thereby guarantee that the camshaft fuel feeding is abundant.
Claims (2)
1. mini engine camshaft-bearing cap, in the design of the bottom surface of described camshaft-bearing cap oil groove is arranged, described oil groove runs through all camshaft shaft holes that camshaft bearing covers, in the middle of the described oil groove and the mail gallery holes that cylinder covers be communicated with, and be communicated with oilhole on the camshaft respectively at the camshaft shaft hole place; It is characterized in that: the position is provided with the circular hole greater than the oil groove width directly over the axis hole that is positioned at camshaft-bearing cap on the described oil groove.
2. mini engine camshaft-bearing cap according to claim 1 is characterized in that: described Circularhole diameter 5～7mm, the degree of depth is consistent with the oil groove degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120085409XU CN202001073U (en) | 2011-03-28 | 2011-03-28 | Camshaft bearing cover of small-sized engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120085409XU CN202001073U (en) | 2011-03-28 | 2011-03-28 | Camshaft bearing cover of small-sized engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001073U true CN202001073U (en) | 2011-10-05 |
Family
ID=44703818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120085409XU Expired - Fee Related CN202001073U (en) | 2011-03-28 | 2011-03-28 | Camshaft bearing cover of small-sized engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001073U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104662266A (en) * | 2012-09-26 | 2015-05-27 | 大丰工业株式会社 | Oil strainer |
| CN113669173A (en) * | 2021-07-29 | 2021-11-19 | 哈尔滨东安汽车动力股份有限公司 | Front end cover of camshaft |
-
2011
- 2011-03-28 CN CN201120085409XU patent/CN202001073U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104662266A (en) * | 2012-09-26 | 2015-05-27 | 大丰工业株式会社 | Oil strainer |
| CN104662266B (en) * | 2012-09-26 | 2017-04-19 | 大丰工业株式会社 | Oil strainer |
| CN113669173A (en) * | 2021-07-29 | 2021-11-19 | 哈尔滨东安汽车动力股份有限公司 | Front end cover of camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20180328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |