CN1820139A - Engine - Google Patents
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- CN1820139A CN1820139A CN 200480019746 CN200480019746A CN1820139A CN 1820139 A CN1820139 A CN 1820139A CN 200480019746 CN200480019746 CN 200480019746 CN 200480019746 A CN200480019746 A CN 200480019746A CN 1820139 A CN1820139 A CN 1820139A
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- China
- Prior art keywords
- opening
- cylinder head
- roof
- motor
- accommodating chamber
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- 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.)
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
It is an object of the invention to provide an engine, which can be decreased in height while the strength of a cylinder head is ensured. An engine 11 according to the invention is constructed such that a cam chain 19 is trained around a sprocket 17 fixed to a camshaft 16, a roof wall 13c of an accommodation chamber 13b, which accommodates therein the sprocket 17, is formed integral with a cylinder head 13, an opening 13h is formed on an upper surface of the cylinder head 13 to be adjacent to the roof wall 13c, and intake and exhaust valves 22, 23 face outside from the opening 13h, and that an opened surface of the opening 13h is positioned in a lower position than an upper end of the roof wall 13c and formed on the same plane.
Description
Technical field
The present invention relates to a kind of motor, wherein, rotatable parts for example sprocket wheel etc. are fixed on the camshaft that is arranged on cylinder head one side.
Background technique
Routinely, for motor, cylinder head clamps and is fixed to the top of cylinder block by a plurality of clamping bolts, piston is arranged in the cylinder block can to-and-fro motion, be provided with intake valve and exhaust valve to open and close the firing chamber that limits by piston, cylinder block, cylinder head etc., be provided with rocking arm to promote described valve.
In addition, cylinder head is provided with the camshaft that drives rocking arm, and this camshaft is provided with sprocket wheel, passes to this sprocket wheel from the driving force of bent axle.On cylinder head, be formed with opening so that intake valve, exhaust valve and sprocket wheel are exposed to the outside, be provided with valve mechanism cover on the top of cylinder head to cover described opening.By taking off valve mechanism cover, can carry out tappet adjustment (for example, seeing JP-A-2000-303906).
Yet, according to this conventional engine, owing on cylinder head, be formed with big opening so that intake valve, exhaust valve and sprocket wheel are exposed to the outside, so reduction in strength, independent stiffening plate is being installed above the opening and is further being installed on this stiffening plate under the situation of valve mechanism cover, the quantity of parts increases and the height of motor increases.
In addition, be formed at two positions and tilt, so the unusual difficulty of the formation of opening along different direction owing to make intake valve and exhaust valve be exposed to outside opening.
Summary of the invention
Therefore, the present invention considers the problems referred to above, the purpose of this invention is to provide a kind ofly can reduce the motor that the cylinder head height is guaranteed its intensity simultaneously.
Can realize a kind of like this motor of the invention provides of above-mentioned purpose, it is characterized in that, rotatable parts are fixed on the camshaft that is arranged on the cylinder head, driving force from bent axle is delivered to described rotatable parts, roof and the described cylinder head of holding the accommodating chamber of described rotatable parts form one, the facial opening that is formed with near described roof on described cylinder head, intake valve and exhaust valve are configured to from described opening towards the outside, and the opening surface of described opening is positioned at the position of the upper end that is lower than described roof and is on the identical plane.
In addition, preferably, in motor of the present invention, be provided with in described opening inboard and be used for described cylinder head is fixed to cylinder head gripping members on the cylinder block, described cylinder head gripping members is arranged to by described opening towards the outside.
In addition, the invention that can realize above-mentioned purpose provides a kind of like this motor, it is characterized in that, rotatable parts are fixed on the camshaft that is arranged on the cylinder head, on described rotatable parts, be wound with the driving belt that is used to transmit from the winding of the driving force of bent axle, in described cylinder head, form the accommodating chamber that comprises roof and hold described rotatable parts, the facial opening that is formed with near described roof on described cylinder head, be used for that described cylinder head is fixed to cylinder head gripping members on the cylinder block and be configured to from described opening towards the outside, the opening surface of described opening is formed at the position of the upper end that is lower than described roof.
In addition, preferably, in motor of the present invention, the fitting surface that the valve mechanism cover with being used to cover described opening of the peripheral part of described opening cooperates, indented central in the position corresponding towards described opening with the position of accommodating chamber one side of wherein arranging described rotatable parts, thus accommodating chamber side recess formed.
In addition, preferably, in motor of the present invention, a side relative of the fitting surface that cooperates with the valve mechanism cover that is used to cover described opening of the peripheral part of described opening with accommodating chamber, to form spark plug side recess, in described spark plug side recess, be furnished with spark plug towards the indented central of described opening.
In addition, preferably, in motor of the present invention, described intake valve and exhaust valve from described single opening towards the outside.
In addition, preferably, in motor of the present invention, the opening surface of described opening tilts with respect to cylinder-bore axis.
In addition, preferably, in motor of the present invention, described roof is an arch when described camshaft is seen, its diameter is greater than the diameter of described rotatable parts.
Description of drawings
Fig. 1 is the sectional view that cylinder head according to an embodiment of the invention is shown;
Fig. 2 illustrates the front view that the part according to this embodiment's cylinder head disconnects;
Fig. 3 illustrates the view of this embodiment on the right side of Fig. 2;
Fig. 4 illustrates the front view that the part according to this embodiment's AIS arrangement states disconnects;
Fig. 5 illustrates according to this embodiment's the intake valve and the sectional view of exhaust valve;
Fig. 6 is the plan view that illustrates according to this embodiment's cylinder head;
Fig. 7 is the side view that illustrates according to this embodiment's cylinder head.
In addition, reference number 11 indication motors in the accompanying drawing, 13 indication cylinder head, 13a indicates jack, and 13b indicates accommodating chamber, 13c indicates roof, 13d indicates fitting surface, 13e indication accommodating chamber side recess, 13f pilot spark plug side recess, 13g indication accommodating chamber opening, 13h indicates opening, and 16a indicates camshaft, 17 indication sprocket wheels (rotatable parts), 19 indication cam chains (driving belt of winding), 22 indication intake valves, 23 indication exhaust valves, 27 indication valve mechanism cover, 31 showing rod's hook bolts (cylinder head gripping members), 32 indication clamping bolts (cylinder head gripping members).
Embodiment
The following describes one embodiment of the present of invention.
Fig. 1～7 illustrate this embodiment of the present invention.
At first, its structure is described, reference number 11 indications among Fig. 1 are arranged on the single-cylinder four-stroke four-valve engine on the motorcycle, and this motor 11 comprises the cylinder head 13 that is fixed on the cylinder block (not shown).
As shown in Figure 1, the bearing 14,15 that differs from one another by diameter on cylinder head 13 is provided with camshaft 16 rotationally, and the sprocket wheel 17 of conduct " rotatable parts " is installed by bolt 18 at an end of camshaft 16.Cam chain 19 as " twining the driving belt of (flexibility) " is wrapped on the sprocket wheel 17, thereby is delivered to sprocket wheel 17 and camshaft 16 from the driving force of bent axle by cam chain 19.
Camshaft 16 is formed with air inlet and the 16a of exhaust cam portion, as shown in Figure 5, and an end 20a, the 21a of intake rocker 20 and the exhaust rocker arm 21 cam part 16a that reclines, intake valve 22 and exhaust valve 23 and the other end 20b, 21b recline.Thereby when camshaft 16 rotated, corresponding rocking arm 20,21 was swung on turning axle 20c, 21c, thereby activated corresponding valve 22,23 to open and close inlet air pathway 24 and exhaust passageway 25 with predetermined timing.
In addition, as shown in Figure 6, be furnished with stud bolt 31 and clamping bolt 32 respectively in two positions of the both sides of opening 13h convexity wheel shaft 16, thereby cylinder head 13 is installed on the cylinder block by stud bolt 31 and clamping bolt 32 as " cylinder head gripping members ".
More specifically, insert and be fixed to the jack that is formed on the cylinder block as the stud bolt 31 of " clamping bolt ", outstanding thereby stud bolt 31 is arranged to from cylinder block.Stud bolt 31 inserts the jack 13a of cylinder head 13, is arranged to the parallel axes with cylinder.Turnbuckle 32 is screwed on the stud bolt 31, thereby cylinder head 13 is installed on the cylinder block.
By taking off valve mechanism cover 27, can expose and the turnbuckle 32 that can install or remove, by taking off turnbuckle 32, can take off cylinder head 13 from cylinder block.
On the other hand, as shown in Figure 1, the ventilation rotor 36 of air-breather 35 is installed on the sprocket wheel 17 of left end among the figure that is fixed to camshaft 16, relatively is provided with ventilation fixed body 37 with ventilation rotor 36.In addition, be furnished with the revolution part 40 of the decompressor 39 of moving axis 41 rotations that can rotate in ventilation rotor 36, revolution part 40 is owing to the centrifugal force that produces when sprocket wheel 17 rotates turns round.
The fitting surface 13d that the valve mechanism cover 27 with being used to open and close opening 13h of the peripheral part of opening 13h cooperates, be formed with accommodating chamber side recess 13e in the position corresponding with the position of accommodating chamber 13b one side of wherein arranging sprocket wheel 17, this recess is towards the indented central of opening.Stud bolt 31 and turnbuckle 32 are arranged in the position of accommodating chamber side recess 13e both sides.
In addition, on the side relative of fitting surface 13d, be formed with, in this spark plug side recess 13f, be furnished with spark plug 43 towards the spark plug side recess 13f of the indented central of described opening with accommodating chamber 13b.
In addition,, on fitting surface 13d, formed attachment face 13i, AIS (gas handling system) 50 has been installed on this attachment face 13i as Fig. 4 and shown in Figure 6.
In addition, accommodating chamber 13b transversely be formed with accommodating chamber opening 13g, the 48a of department of assembly of the water pump cover 48 of pumping plant 47 is fitted into and is installed to sealing state on the accommodating chamber opening 13g.Pumping plant 47 comprises impeller shaft 45 and impeller 46, and impeller shaft 45 is fitted in the bolt 18 that is installed on the camshaft 16, thereby impeller 46 rotates when camshaft 16 rotates.
According to this structure,, can increase the intensity of cylinder head 13 by the roof 13c of formation with accommodating chamber 13b cylinder head 13 one, that hold sprocket wheel 17.In addition, as mentioned above, owing to can guarantee the rigidity of cylinder head 13, the opening surface that can form opening 13h by the position in the upper end that is lower than roof 13c reduces the height of cylinder head 13.That is, when opening 13h formed near accommodating chamber 13b, rigidity reduced, thereby need independent stiffening plate be set on opening 13h, and when valve mechanism cover 27 was fixed on the stiffening plate, the height of cylinder head 13 increased.On the contrary, according to the present invention, owing to form roof 13c to increase the rigidity of cylinder head 13c, do not need to be provided with any independent stiffening plate, and because opening 13h is formed at the position that is lower than roof 13c, even under valve mechanism cover 27 is installed to situation on the opening 13h, also can reduce the height of cylinder head 13.
In addition, because accommodating chamber 13b laterally is formed with accommodating chamber opening 13g sprocket wheel 17, even and under the situation that accommodating chamber opening 13g will be sealed by water pump cover (packaged unit) 48, roof 13c also forms one with cylinder head 13, so can not being shifted halfway, can guarantee the periphery (fitting surface) of accommodating chamber opening 13g to contact, to guarantee sealability with the fitting surface of the 48a of department of assembly of water pump cover 48.
That is, if roof 13c separates with cylinder head 13, the periphery (sealed department) of accommodating chamber opening 13g will become discontinuous, thereby may cause producing displacement, poor sealing performance etc. between sealed department and roof 13c owing to be shaped, assemble equal error.On the contrary, according to the present invention, roof 13c and cylinder head 13 form one to eliminate this issuable poor sealing performance etc.
In addition, because the opening surface of opening 13h is formed at same plane,, can more easily form opening surface so compare with the situation of the opening that forms a plurality of different inclinations.
In addition, by stud bolt 31 and turnbuckle 32 are arranged in opening 13h inside, can do stud bolt 31 shorter and axial force more stable, and because stud bolt 31 and turnbuckle 32 are not projected into valve mechanism cover 27 tops, so can reduce the height of motor 11.In addition,, can carry out the tappet adjustment with stud bolt 31 and the turnbuckle 32 of installing or removing by taking off valve mechanism cover 27, thus can be from the cylinder block cylinder head 13 that installs or removes.
In addition, the fitting surface 13d of the outer periphery of opening 13h is the indented central towards opening 13h in the position corresponding with the position of accommodating chamber 13b one side of wherein arranging sprocket wheel 17, form accommodating chamber side recess 13e, thereby can make sprocket wheel 17 near corresponding valve 22,23, so that cylinder head 13 (top of motor 11) is compact more along the width of camshaft 16.
In addition, by arranging spark plug 43 among the spark plug side recess 13f around the fitting surface 13d on the outer periphery of opening 13h, spark plug 43 can be arranged between the corresponding valve 22,23 further erecting vertically, thereby can make cylinder head 13 compact more along the width of camshaft 16.
In addition, since intake valve 22 and exhaust valve 23 from single opening 13h inside towards the outside, so can carry out the adjustment of intake valve 22 and exhaust valve 23 by taking off the valve mechanism cover 27 that covers opening 13h.
In addition, because when camshaft 16 is seen, roof 13c is shaped as arch, and its diameter is greater than the diameter of sprocket wheel 17, so can make that to be arranged under the state among the roof 13c idle space among the roof 13c at sprocket wheel 17 as far as possible little, thereby can make the profile of roof 13c compact as far as possible.
In addition, as Fig. 4 and shown in Figure 6, fitting surface 13d and the attachment face 13i that AIS (gas handling system) 50 is installed form one, thereby can easily form attachment face 13i, and, can only, valve mechanism cover 27 arrange AIS 50 on the fitting surface 13d simply by being installed in by AIS 50 is arranged on the valve mechanism cover 27.
Incidentally, the opening surface of opening 13h can tilt with respect to cylinder-bore axis shown in the double dot dash line A among Fig. 1 in the mode that reduces at the opposite side of roof 13c.Utilize this layout, can insert instrument so that from the operation that laterally installs or removes of stud bolt 31 and turnbuckle 32 from opening 13h, thereby can easily carry out housekeeping operation.
In addition, although present embodiment applies the present invention to be used for the motor 11 of motorcycle, yet the present invention can be applicable to the motor of other purposes certainly.In addition, motor is not limited to single-cylinder four-stroke engine, also can be the motor of other type.In addition, although adopt sprocket wheel 17 as " rotatable parts ", this is not restrictive, can use belt wheel to replace sprocket wheel 17 yet, and uses band to replace cam chain 19 as " driving belt of winding ".In addition, can adopt gear to replace sprocket wheel 17, thus can be by the driving force of a plurality of gear transmission from bent axle.
Although describe the present invention in detail with reference to specific embodiment, those skilled in the art obviously are appreciated that under the situation that does not break away from the spirit and scope of the present invention can carry out variations and modifications.
The application is based on the Japanese patent application (patent application No.2004-176406) of Japanese patent application of submitting on July 10th, 2003 (patent application No.2003-195211) and 15 submissions June in 2004, and the content of these two patent applications is incorporated herein by reference.
Industrial applicability
According to the present invention, the roof of the accommodating chamber by will holding rotatable parts and cylinder head form one, Can increase the intensity of cylinder head. In addition, as mentioned above, owing to can guarantee the rigidity of cylinder head, The opening surface that can form by the position in the upper end that is lower than roof opening reduces the height of cylinder head Degree. That is, when opening forms near the top of accommodating chamber and not with roof during with cylinder head formation one, Stiffness degradation, thus independent stiffener need to be set on opening, and because valve mechanism cover Be fixed on the stiffener, the height of cylinder head increases. On the contrary, according to the present invention, because the one landform Become roof to increase the rigidity of cylinder head, do not need to arrange any independent stiffener, and owing to open The degree of lip-rounding is formed in the position that is lower than roof, even also can fall under valve mechanism cover is installed to situation on the opening The height of low cylinder head.
In addition and since accommodating chamber rotatable parts laterally be formed with the accommodating chamber opening, even and The accommodating chamber opening will be closed in the situation of parts sealing, and roof also forms one with cylinder head, so The periphery of accommodating chamber opening (mating surface) can not be shifted halfway but can guarantee the packaged unit that reclines Mating surface is to guarantee sealing property.
In addition because opening surface is formed at identical plane, so from form a plurality of different gradients The situation of opening is compared, and can more easily form opening surface.
In addition, according to the present invention, the cylinder head clamping part is arranged in open interior, thus can be with gas The position of cylinder cap clamping part reduces, thereby can be with cylinder head clamping part (for example, fishbolt) Do shortly and axial force stable, and because the cylinder head clamping part is not projected into the valve mechanism cover top, So can reduce the height of engine. In addition, by taking off valve mechanism cover, can carry out the tappet adjustment And the cylinder head clamping part that installs or removes, thereby can be from the cylinder block cylinder head that installs or removes.
In addition, accommodating chamber side recess is formed on the mating surface of neighboring of opening with wherein arranging and rotates The position corresponding to position of accommodating chamber one side of parts, thus can so that rotatable parts near valve, with So that cylinder head is compacter along the width of camshaft.
In addition, by the fire towards the indented central of opening around the mating surface on the neighboring of opening Arrange spark plug in the flower plug side recess, spark plug can be arranged between the corresponding valve with further Erect vertically, thus can be so that cylinder head be compacter along the width of camshaft.
In addition, since inlet valve and exhaust valve from single open interior towards the outside, so can be by getting The valve mechanism cover that covers down opening is carried out the adjustment of inlet valve and exhaust valve.
In addition because the opening surface of opening tilts, so can be from this opening insertion tool so that From the operation that laterally installs or removes of cylinder head clamping part, thereby can easily safeguard.
In addition, because roof forms the arch corresponding to circular rotatable parts, rotating so can make Idle space under the state of arrangements of components in roof in the roof is as far as possible little, thereby can make roof Profile as far as possible compact.
Claims (8)
1. motor, it is characterized in that, rotatable parts are fixed on the camshaft that is arranged on the cylinder head, driving force from bent axle is delivered to described rotatable parts, roof and the described cylinder head of holding the accommodating chamber of described rotatable parts form one, a facial opening that is formed with near described roof on described cylinder head, intake valve and exhaust valve are configured to from described opening towards the outside, and the opening surface of described opening is positioned at the position of the upper end that is lower than described roof and in the same plane.
2. motor according to claim 1 is characterized in that, is provided with in described opening inboard to be used for described cylinder head is fixed to cylinder head gripping members on the cylinder block, and described cylinder head gripping members is arranged to by described opening towards the outside.
3. motor, it is characterized in that, rotatable parts are fixed on the camshaft that is arranged on the cylinder head, on described rotatable parts, be wound with the driving belt that is used to transmit from the winding of the driving force of bent axle, in described cylinder head, be formed with the accommodating chamber that comprises roof and hold described rotatable parts; And,
The facial opening that is formed with near described roof on described cylinder head, be used for that described cylinder head is fixed to cylinder head gripping members on the cylinder block and be configured to from described opening towards the outside, the opening surface of described opening is formed at the position of the upper end that is lower than described roof.
4. according to each described motor in the claim 1～3, it is characterized in that, the fitting surface that the valve mechanism cover with being used to cover described opening of the peripheral part of described opening cooperates, indented central in the position corresponding towards described opening with the position of accommodating chamber one side of wherein arranging described rotatable parts, thus accommodating chamber side recess formed.
5. according to each described motor in the claim 1～3, it is characterized in that, a side relative of the fitting surface that cooperates with the valve mechanism cover that is used to cover described opening of the peripheral part of described opening with described accommodating chamber, to form spark plug side recess, in described spark plug side recess, be furnished with spark plug towards the indented central of described opening.
6. according to each described motor in the claim 1～3, it is characterized in that, described intake valve and exhaust valve from described single opening towards the outside.
7. according to each described motor in the claim 1～3, it is characterized in that the opening surface of described opening tilts with respect to cylinder-bore axis.
8. according to each described motor in the claim 1～3, it is characterized in that described roof is an arch when described camshaft is seen, its diameter is greater than the diameter of described rotatable parts.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP195211/2003 | 2003-07-10 | ||
| JP2003195211 | 2003-07-10 | ||
| JP176406/2004 | 2004-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1820139A true CN1820139A (en) | 2006-08-16 |
| CN100480497C CN100480497C (en) | 2009-04-22 |
Family
ID=36919491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800197461A Expired - Fee Related CN100480497C (en) | 2003-07-10 | 2004-07-06 | Engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100480497C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103328798A (en) * | 2011-01-05 | 2013-09-25 | 克莱斯勒集团有限责任公司 | Cylinder head cover module with integrated valve train |
| CN106232971A (en) * | 2014-04-25 | 2016-12-14 | 雅马哈发动机动力产品株式会社 | Electromotor |
-
2004
- 2004-07-06 CN CNB2004800197461A patent/CN100480497C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103328798A (en) * | 2011-01-05 | 2013-09-25 | 克莱斯勒集团有限责任公司 | Cylinder head cover module with integrated valve train |
| CN103328798B (en) * | 2011-01-05 | 2015-12-16 | 克莱斯勒集团有限责任公司 | There is the cylinder head cover module of integrated valve train |
| CN106232971A (en) * | 2014-04-25 | 2016-12-14 | 雅马哈发动机动力产品株式会社 | Electromotor |
| US10240509B2 (en) | 2014-04-25 | 2019-03-26 | Yamaha Motor Power Products Kabushiki Kaisha | Engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100480497C (en) | 2009-04-22 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20100706 |