CN201778848U - Overhead camshaft driving system of diesel engine - Google Patents
Overhead camshaft driving system of diesel engine Download PDFInfo
- Publication number
- CN201778848U CN201778848U CN2010202992390U CN201020299239U CN201778848U CN 201778848 U CN201778848 U CN 201778848U CN 2010202992390 U CN2010202992390 U CN 2010202992390U CN 201020299239 U CN201020299239 U CN 201020299239U CN 201778848 U CN201778848 U CN 201778848U
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- camshaft
- chain wheel
- main chain
- holder
- gear
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Abstract
The utility model discloses an overhead camshaft driving system of a diesel engine, which comprises a camshaft seat, a camshaft, a camshaft main chain wheel, a cylinder head, a chain, a main chain wheel idle gear, a main chain wheel, a drive gear, a middle idle gear and a cylinder body, wherein the camshaft is mounted on the camshaft seat, the camshaft seat adopts an integral frame structure, and the camshaft seat overlaps the cylinder head. The overhead camshaft driving system of diesel engine provided by the utility model is simple in manufacturing and processing technologies, low in processing cost, and convenient in maintenance; an overhead camshaft engine can be quickly developed on the basis of a central camshaft engine, so as to reduce the design of special pieces, shorten the development cycle of the engine, and lower the development cost of the engine; and the overhead camshaft driving system can be extensively applied to the development of various overhead camshaft engines.
Description
Technical field
The invention belongs to technical field of automobile engine, particularly relate to a kind of diesel engine overhead cam axle system.
Background technique
At present, the diesel engine camshaft generally adopts gear drive, and camshaft adopts underlying or mid-arrangement to be installed on the cylinder block, drives the rocking arm swing by mechanisms such as tappet, push rods, closes thereby drive valve opening.Owing to adopted mechanisms such as tappet, push rod, distribution device transmission chain length, structure are not compact, and movement parts quality height is unfavorable for the high engine speeds running, can cause the engine noise height simultaneously, and parts reliability reduces.Overhead camshaft engine camshaft installation frame and cylinder head design for one, and this structure is made, the processing technology complexity, and cost is higher, simultaneously the maintenance maintenance difficulty.
CN101324195A discloses a kind of driving mechanism of diesel engine overhead camshaft, comprise the gear chamber that is installed on the cylinder of diesel engine, and camshaft and bent axle, be provided with chain-driven unit and gear drive in gear chamber from top to bottom, described bent axle, gear drive, chain-driven unit and camshaft are in transmission connection successively.On the diesel engine of traditional camshaft side, realize camshaft overhead structure, improved the high rate performance of diesel engine.But structure needs further to simplify, and reliability needs further to improve.
Summary of the invention
The present invention overcomes the problems referred to above of diesel engine, can reduce the mechanicalness noise of motor, improves engine reliability.The invention provides a kind of compact structure, upgrading is easy, reliability is high, the motion noise is low, processing cost is low, maintenance maintenance modern diesel engines overhead camshaft driving system structure easily.
The invention provides a kind of diesel engine overhead camshaft drive system, comprise camshaft holder, camshaft, camshaft main chain wheel, cylinder head, chain, main chain wheel idle gear, main chain wheel, actuation gear, intermediate idler gear and cylinder block.Camshaft is installed on the camshaft holder, and camshaft holder is the integral frame structure, and camshaft holder is stacked on the cylinder head; Gear transmission is actuation gear, intermediate idler gear, main chain wheel idle gear in proper order, main chain wheel idle gear and the coaxial installation of main chain wheel, chain is installed on main chain wheel and the camshaft main chain wheel, the camshaft main chain wheel is installed in camshaft one end, and intermediate idler gear and main chain wheel idle gear are installed in the cylinder block front end.
Camshaft holder and cylinder block are the split project organization, camshaft holder is the integral frame structure, 5 camshaft mounting hole supporting cam wheel axles are arranged on the camshaft holder, each supported hole all has 1 oil leab and links to each other with the camshaft holder main oil gallery, machine oil arrives the camshaft holder main oil gallery by cylinder block main oil gallery by the external machine oil pipe of cylinder block, flow to camshaft mounting hole camshaft lubrication from main oil gallery, camshaft holder is stacked on the cylinder head.
Actuation gear, intermediate idler gear, main chain wheel idle gear, main chain wheel, chain and the design of wheel shaft main chain wheel corresponding position have timing marks, and respectively corresponding timing marks is installed during the assembling of timing system part.
Camshaft drive system is arranged in motor head.
Camshaft drive system drives main chain wheel by the two-stage idler mechanism, main chain wheel by with the chain drive camshaft main chain wheel of its engagement, thereby drive the camshaft rotation.
The camshaft main chain wheel is installed in the camshaft front end.
Because adopt above-mentioned technological scheme, the present invention has following beneficial effect:
1. can on mid-cam axle engine basis, develop overhead camshaft engine fast, shorten the engine development cycle and reduce the engine development expense.
2. adopt the overhead-cam design cost of cylinder head and camshaft frame split design low, Design and Machining is simple, and maintenance maintenance is convenient.
3. cancel rigidity contacts such as push rod, tappet, adopted chain drive, can reduce engine noise, improved engine reliability.
4. behind the camshaft overhead, can improve engine speed, for the reinforcement of motor provides the foundation.
Description of drawings
Fig. 1 is a diesel engine overhead camshaft drive system installation diagram of the present invention;
Fig. 2 is diesel engine overhead camshaft drive system engine oil passage figure of the present invention;
Fig. 3 is a diesel engine overhead camshaft drive system camshaft holder sectional drawing of the present invention
Mark the following drawings mark thereon in conjunction with the accompanying drawings:
The 1-camshaft holder, 2-camshaft, 3-camshaft main chain wheel, 4-cylinder head, 5-chain, 6-main chain wheel idle gear, 7-main chain wheel, 8-actuation gear, 9-intermediate idler gear, 10-cylinder block, 11-machine oil pipe, 12-camshaft mounting hole, 13-camshaft lubrication oil duct.
Embodiment
Below in conjunction with accompanying drawing embodiment is illustrated:
As Fig. 1, Fig. 2 and shown in Figure 3, camshaft holder is installed on the cylinder head, camshaft is installed on the camshaft holder, camshaft holder and cylinder block design for split, camshaft holder is the integral frame structure, 5 camshaft mounting hole supporting cam wheel axles are arranged on the camshaft holder, each supported hole all has an oil leab and links to each other with the camshaft holder main oil gallery, machine oil arrives the camshaft holder main oil gallery by cylinder block main oil gallery by the external machine oil pipe of cylinder block, flows to camshaft mounting hole camshaft lubrication from main oil gallery.When engine running, bent axle drives actuation gear 8 rotations that are installed in its front end, driving intermediate idler gear 9 by actuation gear 8 rotations rotates, thereby intermediate idler gear 9 is rotated and is driven 6 motions of main chain wheel idle gear, because main chain wheel idle gear 6 and main chain wheel 7 are installed on the same axis, when 6 rotations of main chain wheel idle gear, main chain wheel 7 is also followed its rotation, main chain wheel 7 drives 3 rotations of camshaft main chain wheel by the chain 6 of its engagement, thus drive cam shaft.Camshaft mounting hole 12 communicates with camshaft lubrication oil duct 13, communicates with the machine oil system by machine oil pipe 11.
Actuation gear 8, intermediate idler gear 9, main chain wheel idle gear 6, main chain wheel 7, chain 6 have timing marks with the design of wheel shaft main chain wheel 3 corresponding positions, and the difference correspondence markings was installed when the timing system part assembled like this, guaranteed the accuracy of engine timing.
Diesel engine overhead camshaft drive system of the present invention has been cancelled rigidity contacts such as push rod, tappet, has reduced engine noise, has reduced the motor cost, engine reliability improves.Adopt the split type overhead camshaft engine structure of camshaft holder and cylinder block simultaneously, camshaft holder adopts the integral frame structure, manufacturing processing technic is simple, processing cost is lower, maintenance maintenance is convenient, and can on mid-cam axle engine basis, develop overhead camshaft engine fast, shorten the engine development cycle and reduce the engine development expense.
It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technological scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to the above embodiments,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technological scheme and the improvement thereof of spirit and scope of the present utility model, all should be encompassed in the claim scope of the present utility model.
Claims (6)
1. diesel engine overhead camshaft drive system, comprise camshaft holder, camshaft, camshaft main chain wheel, cylinder head, chain, main chain wheel idle gear, main chain wheel, actuation gear, intermediate idler gear and cylinder block, it is characterized in that: camshaft is installed on the camshaft holder, camshaft holder is the integral frame structure, and camshaft holder is stacked on the cylinder head; Gear transmission is actuation gear, intermediate idler gear, main chain wheel idle gear in proper order, main chain wheel idle gear and the coaxial installation of main chain wheel, chain is installed on main chain wheel and the camshaft main chain wheel, the camshaft main chain wheel is installed in camshaft one end, and intermediate idler gear and main chain wheel idle gear are installed in the cylinder block front end.
2. according to the described camshaft drive system of claim 1, it is characterized in that: camshaft holder and cylinder head are split-type structural.
3. according to the described camshaft drive system of claim 1, it is characterized in that: actuation gear, intermediate idler gear, main chain wheel idle gear, main chain wheel, chain and the design of wheel shaft main chain wheel corresponding position have timing marks, and respectively corresponding timing marks is installed during the assembling of timing system part.
4. according to the described camshaft drive system of claim 1, it is characterized in that: the camshaft lubrication oil duct and the camshaft mounting hole that have camshaft lubrication on the camshaft holder.
5. according to the described camshaft drive system of claim 1, it is characterized in that: camshaft holder is the integral frame structure, 5 camshaft mounting hole supporting cam wheel axles are arranged on the camshaft holder, have the main oil gallery of camshaft lubrication on the camshaft holder, each camshaft supported hole all has 1 oil leab and links to each other with the main oil gallery of camshaft holder, and machine oil arrives the camshaft holder main oil gallery by cylinder block main oil gallery by the external machine oil pipe of cylinder block.
6. according to the described camshaft drive system of claim 1, it is characterized in that: camshaft drive system is arranged in motor head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992390U CN201778848U (en) | 2010-08-17 | 2010-08-17 | Overhead camshaft driving system of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992390U CN201778848U (en) | 2010-08-17 | 2010-08-17 | Overhead camshaft driving system of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778848U true CN201778848U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202992390U Expired - Fee Related CN201778848U (en) | 2010-08-17 | 2010-08-17 | Overhead camshaft driving system of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944380A (en) * | 2012-10-13 | 2013-02-27 | 中国兵器工业集团第七〇研究所 | Camshaft fatigue test simulation device for single-overhead rock arm structure of engine |
-
2010
- 2010-08-17 CN CN2010202992390U patent/CN201778848U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944380A (en) * | 2012-10-13 | 2013-02-27 | 中国兵器工业集团第七〇研究所 | Camshaft fatigue test simulation device for single-overhead rock arm structure of engine |
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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: 20110330 Termination date: 20150817 |
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| EXPY | Termination of patent right or utility model |