CN201074535Y - Overhead cam assembly of all-purpose petrol engine - Google Patents
Overhead cam assembly of all-purpose petrol engine Download PDFInfo
- Publication number
- CN201074535Y CN201074535Y CNU2007201249572U CN200720124957U CN201074535Y CN 201074535 Y CN201074535 Y CN 201074535Y CN U2007201249572 U CNU2007201249572 U CN U2007201249572U CN 200720124957 U CN200720124957 U CN 200720124957U CN 201074535 Y CN201074535 Y CN 201074535Y
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- oil
- sprocket wheel
- utility
- oil hole
- center
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses an overhead cam assembly of a universal gasoline engine, which comprises a cam (1), a chain wheel (2) and a mechanism of decompressor (3), wherein the mechanism of decompressor (3) is mounted between the cam (1) and the chain wheel (2), two to six oil through holes (4) are arranged on the plate surface of the chain wheel (2), the center of each oil through hole (4) is positioned on a same circumference (S), the center of the circumference (S) and the center of the chain wheel (2) are coincided. Compared with the prior art, the utility model leads engine oil in a crankcase to splash to lubricate a valve rocker arm under the premise that an oil channel on the head of a cylinder is eliminated, thereby the normal work of an engine can be guaranteed. The utility model has the advantages of simple structure, easy manufacture and the like, simultaneously the cost of a whole machine of a gasoline engine is greatly reduced.
Description
Technical field
The utility model belongs to the technology of gasoline engine field, specifically, relates to a kind of general gasoline engines overhead cam assembly.
Background technique
The overhead cam assembly is as the distribution driving mechanism of vertical shaft general gasoline engines, and main effect is that valve is is in time opened and closed by certain order of work and port timing, and guarantees that valve has enough lifts.Chang Yong general gasoline engines overhead cam assembly generally is made up of parts such as cam, sprocket wheel and the mechanisms of decompressor in the market, and its cam and sprocket wheel are by direct die forging or casting, and the mechanism of decompressor is installed between cam and the sprocket wheel.Because the design of the oil duct on the gasoline engine cylinder head is complicated, process loaded down with trivial detailsly, cause the rising of complete machine cost; If cancel oil duct on the cylinder head, then during engine operation, the machine oil that sprocket wheel can hinder in the crankcase is splashed to the valve rocker place, causes the lubricated cooling of valve rocker bad, causes valve rocker stuck at last, and general gasoline engines is flame-out, can not continue proper functioning.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of valve rocker that can guarantee to lubricate good general gasoline engines overhead cam assembly.
The technical solution of the utility model is as follows: a kind of general gasoline engines overhead cam assembly, comprise cam, sprocket wheel and the mechanism of decompressor, and wherein the mechanism of decompressor is installed between cam and the sprocket wheel, and its key is: offered oil hole on the card of described sprocket wheel.
Adopt above technological scheme, when cylinder head does not have the oil duct design, engine operation can make the machine oil that splashes in the crankcase be splashed on the valve rocker by the oil hole of crossing on the sprocket wheel card, play the effect of lubricated cooling, and lubrication effect is good, can prevent effectively that valve rocker is stuck, ensure the motor proper functioning.Owing to cancelled oil duct on the cylinder head, simplified the structure of cylinder head so greatly, the processing of cylinder head is more prone to, thereby has reduced the cost of Gasoline Engine.
In order to continue, equably valve rocker to be lubricated cooling as far as possible, on the card of above-mentioned sprocket wheel, offer 2-6 and cross oil hole, each crosses being centered close on the same circumference of oil hole, and the center of this circumference overlaps with the center of described sprocket wheel.
The next door of crossing oil hole in above-mentioned sprocket wheel bottom surface offers the inclination oil groove, and this inclination oil groove low side is wide, high-end narrow, and the high-end and described oil hole of crossing of inclination oil groove communicates.When engine operation, the inclination oil groove can be stored a part of machine oil; Inclination oil groove low side is wide, high-end narrow, has leading role, rotation along with sprocket wheel, machine oil in the inclination oil groove splashes under action of centrifugal force, together with other machine oil that splashes in the crankcase, be splashed on the valve rocker by the oil hole of crossing on the sprocket wheel, be splashed to the machine oil abundance on the valve rocker like this, further improved lubricated cooling effect valve rocker.
Beneficial effect: the utility model compared with prior art, under the prerequisite of oil duct on the cancellation cylinder head, can make machine oil in the crankcase lubricated valve rocker that splashes, thereby guaranteed the proper functioning of motor, have characteristics such as simple in structure, easy processing, greatly reduce the cost of Gasoline Engine simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 analyses and observe the rotation enlarged view for the A-A of Fig. 2.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As Fig. 1, Fig. 2 and shown in Figure 3, the utility model is made of cam 1, sprocket wheel 2 and the mechanism of decompressor 3, pass through direct casting between its cam 1 and the sprocket wheel 2, the mechanism of decompressor 3 is installed between cam 1 and the sprocket wheel 2, by decompression shaft, get rid of piece and torsion spring is formed, the structure of each several part reaches with the assembly relation of cam 1 and sprocket wheel 2 same as the prior art, does not do at this and gives unnecessary details.Offer 2-6 the circular oil hole 4 of crossing on the card of described sprocket wheel 2, in the present embodiment, the number of crossing oil hole 4 is 5, and each crosses being centered close on the same circumference S of oil hole 4, and the center of this circumference S overlaps with the center of described sprocket wheel 2; And the next door of respectively crossing oil hole 4 in described sprocket wheel 2 bottom surfaces offers inclination oil groove 5, and these inclination oil groove 5 low sides are wide, high-end narrow, and the high-end and described oil hole 4 of crossing of inclination oil groove 5 communicates.
The utility model can be used for cylinder head does not have the oil duct design, and when engine operation, inclination oil groove 5 can be stored a part of machine oil; Inclination oil groove 5 low sides are wide, high-end narrow, has leading role, rotation along with sprocket wheel 2, machine oil in the inclination oil groove 5 splashes under action of centrifugal force, together with other machine oil that splashes in the crankcase, is splashed on the valve rocker by the oil hole 4 of crossing on the sprocket wheel 2, play the effect of lubricated cooling, and lubrication effect is good, can prevent effectively that valve rocker is stuck, ensures the motor proper functioning.In order to reach better lubrication effect, each is crossed oil hole 4 and preferably misplaces with the mechanism of decompressor 3 in the axial direction.
In the utility model, the number of crossing oil hole 4 is not limited to 5, also can be 2,3,4, perhaps other number; Similarly, the shape of crossing oil hole 4 also is not limited to circle, also can be oval or other shape that is equal to, and such conversion all falls within the protection domain of the present utility model.
Claims (3)
1. general gasoline engines overhead cam assembly, comprise cam (1), sprocket wheel (2) and the mechanism of decompressor (3), wherein the mechanism of decompressor (3) is installed between cam (1) and the sprocket wheel (2), it is characterized in that: offered oil hole (4) on the card of described sprocket wheel (2).
2. general gasoline engines overhead cam assembly according to claim 1, it is characterized in that: on the card of described sprocket wheel (2), offer 2-6 and cross oil hole (4), each crosses being centered close on the same circumference (S) of oil hole (4), and the center of this circumference (S) overlaps with the center of described sprocket wheel (2).
3. general gasoline engines overhead cam assembly according to claim 1 and 2, it is characterized in that: the next door of crossing oil hole (4) in described sprocket wheel (2) bottom surface offers inclination oil groove (5), this inclination oil groove (5) low side is wide, high-end narrow, and the high-end and described oil hole (4) of crossing of inclination oil groove (5) communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201249572U CN201074535Y (en) | 2007-08-10 | 2007-08-10 | Overhead cam assembly of all-purpose petrol engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201249572U CN201074535Y (en) | 2007-08-10 | 2007-08-10 | Overhead cam assembly of all-purpose petrol engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074535Y true CN201074535Y (en) | 2008-06-18 |
Family
ID=39519798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201249572U Expired - Lifetime CN201074535Y (en) | 2007-08-10 | 2007-08-10 | Overhead cam assembly of all-purpose petrol engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201074535Y (en) |
-
2007
- 2007-08-10 CN CNU2007201249572U patent/CN201074535Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080618 |