CN100360766C - Tappet guide - Google Patents
Tappet guide Download PDFInfo
- Publication number
- CN100360766C CN100360766C CNB2004101013838A CN200410101383A CN100360766C CN 100360766 C CN100360766 C CN 100360766C CN B2004101013838 A CNB2004101013838 A CN B2004101013838A CN 200410101383 A CN200410101383 A CN 200410101383A CN 100360766 C CN100360766 C CN 100360766C
- Authority
- CN
- China
- Prior art keywords
- tappet
- tappet guide
- end surface
- guide
- cam
- 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.)
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Links
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000010721 machine oil Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Not indicated tappet driven by the cam 32 of the rotating cam shaft 27 is guided by the tappet guide 29 in an axial direction thereof. The upper end surface of the tappet guide 29 is formed at a higher position than a top dead center position of the tappet. A downward recess part is formed at a roughly vertical part of a center line of the cam shaft 27. The upper end surface is constructed not to interfere with a rotation locus of the cam 32. Upper part thickness is larger than lower part thickness at a part of the tappet guide 29 having the recess part formed.
Description
Technical field
The present invention relates to a kind of tappet guide, especially a kind of cylinder cover formation, be used for guiding and make the reciprocating tappet of inlet and outlet valve by cam drive respectively.
Background technique
In the motor of for example prior art described in the real fair 8-8285 communique of No. 2841307 communique of Japan Patent or Japanese Utility Model bulletin, as shown in Figure 7, by being installed in the rotation of the camshaft 2 on the cylinder head 1, drive the spring tension that cam 3 overcomes helical spring 4, make tappet 6 basic for columniform tappet guide 5 axially on do straight reciprocating motion, thereby make suction valve 7 or outlet valve 8 open, close.But,, be lower than the top dead center position basic circle state of contact of cam 3 (tappet 6 with) of illustrated tappet 6 along the upper-end surface of the axial setting tappet guide 5 of tappet guide 5 for the upper-end surface that makes tappet guide 5 and the cam 3 of rotation do not disturb.Therefore, on tappet 6, be difficult to store sufficient machine oil, so, exist the problem that the integral body between the outer peripheral surface of the inner peripheral surface that is difficult to guarantee tappet guide 5 and tappet 6 is lubricated.
And in order to make tappet 6 along axially stably the moving back and forth of tappet guide 5, effective measures are to guarantee that tappet guide 5 has bigger axial length.So, shown in Fig. 7 double dot dash line,, tappet guide 5 is positioned near the lower end of bottom dead center position place tappet 6 if being extended to downwards, and so, below tappet guide 5, the machine oil of having to reduce to form on cylinder head 1 overlaps 9 height.Therefore, when casting cylinder cover 1, be used to form the core attenuation in the space of machine oil cover 9, thereby be difficult to guarantee the intensity of core.
On the other hand, shown in Fig. 8 (A), (B), (C) distinguish successively, along with the rotation of camshaft 2, when the jut of cam 3 contacts the outermost circumference position of tappet 6 end faces, since the gap that exists between tappet guide 5 and the tappet 6, therefore, tappet 6 run-off the straights.Especially when the end face circumferential edges of tappet 6 contacted the inner peripheral surface of camshaft 2 and tappet guide 5 on perpendicular to the axial direction of tappet guide 5, very big load acted on the part of tappet guide 5.Therefore, for bearing this load, known method is, as shown in Figure 9, utilizes strengthening rib 11 to connect the wall of the circumferential surface of tappet guides 5 and spark plug adapter 10 and reinforces.
But, structure around the spark plug adapter 10 is just very complicated originally, therefore, and in these cases, to cause the structure of cylinder head 1 upper surface more complicated, and be not only to gain in weight, also have to reduce the gap of each several part, its result, cause when casting cylinder cover 1, be used to form the core attenuation of each clearance space,, also can have the problem that is difficult to guarantee core strength from this respect.
Summary of the invention
The objective of the invention is to, when the end face of realizing tappet can be stored machine oil effectively, make the cam of camshaft of rotation and the upper-end surface of tappet guide not have interference, guarantee the rigidity of tappet guide.
Therefore, the present invention relates to a kind of tappet guide that forms on cylinder head, described cylinder head is provided with the camshaft by the rotatable support of bearing portion, is inserted with tappet in the described tappet guide, by described tappet, make the cam operated inlet valve or the outlet valve of described camshaft.The described tappet that described tappet guide is directly driven by the cam of described camshaft along its axial lead, and, form the upper-end surface also higher described on axially than the top dead center position of described tappet, simultaneously, on the part of described upper-end surface, form downward recess along the direction vertical, and it is big to be formed with top wall thickness rate its underpart wall thickness at position of described recess at least with the centerline direction of described camshaft.
Tappet guide involved in the present invention, on the axle direction of tappet, form its upper-end surface, make its top dead center position also high than tappet, so, can easily store machine oil at the end face of tappet, therefore, can make often carry out between the outer peripheral surface of the inner peripheral surface of tappet guide and tappet lubricated well.And, even tappet axially on form the top dead center position height of the upper-end surface of tappet guide than tappet, but, owing to form downward recess at the position of the direction vertical in the upper-end surface with the centerline direction of camshaft, therefore, can easily avoid rotary motion trace and upper-end surface interference, and easily prevent because the obstruction that the cam drive tappet causes with the cam of camshaft rotation.And, by the cam drive tappet time, bear the load that tilts to produce owing to tappet though form the described recess position of tappet guide,, at this position, the top wall thickness that forms tappet guide is greater than the bottom wall thickness, therefore, for tappet guide, can easily guarantee to support the rigidity of this load, its result has and ruggedized construction needn't be set in addition, and can suppress the advantage that tappet guide weight increases.
Description of drawings
Feature of the present invention and other purpose and advantage will be described with reference to the accompanying drawings as followsly, and in whole accompanying drawings, same or analogous parts will use identical label, wherein:
Fig. 1 is the profile planimetric map according to the embodiment of the invention;
Fig. 2 is the longitudinal section enlarged view along II-II line intercepting among Fig. 1;
Fig. 3 is the longitudinal section enlarged view along III-III line intercepting among Fig. 1;
Fig. 4 is the sectional drawing along the IV-IV line intercepting of Fig. 3;
Fig. 5 is the sectional drawing along the V-V line intercepting of Fig. 3;
Fig. 6 is the zoomed-in view along the arrow VI direction among Fig. 4 and Fig. 5;
Fig. 7 be one type of prior art syringe want portion's sectional arrangement drawing;
Fig. 8 is the job description figure of above-mentioned one type of prior art syringe; And
Fig. 9 is the plan view of the part of one type of prior art syringe.
Embodiment
Below embodiments of the invention are described.
As Fig. 1, Fig. 2 and shown in Figure 3, on the cylinder head 20 of four cylinder engine, from the outstanding upward bearing portion 23,24 that forms of inner bottom surface 22 that surrounds by top sidewall 21 with two suction valves and two outlet valves.By bearing portion 23,24 and bearing cap 25,26, suction valve driven driving is installed on the cylinder head 20 with camshaft 28 is parallel rotationally with outlet valve with camshaft 27, wherein, bearing cap 25,26 by bolt in bearing portion 23,24.
And as Fig. 2, shown in Figure 3, on the centerline direction of camshaft 27,28, across bearing portion 23,24, in the both sides of bearing portion 23,24, whole formation respectively docked subcylindrical tappet guide 29,30.Also promptly, on each cylinder, respectively from the whole continuously tappet guide 29,30 that forms of top sidewall 21 and bearing portion 23,24.
On each tappet guide 29, insert respectively along its tappet that axially can be free to slide 31, tappet 31 overcomes the spring tension of valve spring (helical spring) 33 by the cam 32 of camshaft 27, axially move back and forth along above-mentioned by the guiding of tappet guide 29 straight lines, thus, make suction valve 34 open, close.
Equally, on each tappet guide 30, insert respectively along its tappet that axially can be free to slide 41, tappet 41 overcomes the spring tension of valve spring (helical spring) 43 by the cam 42 of camshaft 28, axially move back and forth along above-mentioned by the guiding of tappet guide 30 straight lines, thus, make outlet valve 44 open, close.
In addition, on each cylinder,, outstanding upward boss part 50 is set, thereby the lower end of columniform spark plug conduit 51 is fixed on the boss part 50 on the inner bottom surface 22 of cylinder head 20 in the center portion of two suction valves and two outlet valves.
Set the upper- end surface 61,62 of each tappet guide 29,30, make its top sidewall 21 low than cylinder head 20, and along tappet guide 29,30 axially on respectively than the top dead center position height of tappet 31,41; In upper- end surface 61,62; edge and the vertical respectively direction (being clipped in the position between the camshaft 27,28) of the centerline direction of camshaft 27,28; form downward groove (recess) 63,64 respectively; thereby, the rotary motion trace mutual noninterference of upper- end surface 61,62 and the cam 32,42 that rotates with camshaft 27,28 respectively.
And, the lower end surface 65,66 of tappet guide 29,30 is arranged to: the cam 32,42 that rotates axially being taken in of tappet guide 29,30 contact with the outermost circumference position of tappet 31,41 end faces respectively and tappet 31,41 when beginning to be pressed down by cam 32,42, be positioned at tappet 31,41 the position, underpart near.Because the top dead center position height than tappet 31,41 is arranged in each upper- end surface 61,62, therefore, form bigger space between the inner bottom surface 22 of lower end surface 65,66 and cylinder head 20, the result forms the oil jacket 80,81 than large space respectively below tappet guide 29,30.
And, as Fig. 2 and shown in Figure 6, on tappet guide 29,30, form the top 67,68 that constitutes recess 63,64 positions respectively, make the wall thickness of its wall ratio its underpart 91,92 big.
In addition, as shown in Figure 4 and Figure 5, each to tappet guide 29,30 in, have only the bottom 69,70 of its perisporium attachment portion to link into an integrated entity with cylinder head 20 respectively.Simultaneously, as depicted in figs. 1 and 2, each attachment portion of tappet guide 29,30 forms one with spark plug conduit boss part 50 respectively continuously in the diagonal positions with the spark plug conduit boss part 50 of camshaft 27,28 rectangular directions.
That is to say, set the upper- end surface 61,62 of tappet guide 29,30 respectively, make its tappet guide 29,30 axially on than the top dead center position height of tappet 31,41, therefore, on the inner circumference side of upper- end surface 61,62, can easily accept machine oil of supplying with on tappet 31,41 or cam 32,42 etc.Thereby can guarantee on the end face of tappet 31,41, to store machine oil.Therefore, the gap between the outer peripheral surface of can be often lubricated well tappet guide 29,30 inner peripheral surfaces and tappet 31,41, thus can guarantee the smooth and easy work of tappet 31,41.
And, as mentioned above, even the upper- end surface 61,62 of setting tappet guide 29,30 is than higher, but, owing on upper- end surface 61,62, be formed with recess 63,64 respectively, can easily avoid upper- end surface 61,62 on the rotary motion trace of the cam 32,42 that rotates with camshaft 27,28, to produce to interfere and hinder, therefore, can prevent the obstruction that cam 32,42 drives in tappet 31,41 processes.
In addition, even on the upper- end surface 61,62 of tappet guide 29,30, form recess 63,64 respectively, but, wall thickness by the wall ratio bottom 91,92 on the top 67,68 that forms this part is big, so, can with do not form recess 63,64 tappet guide 29,30 be arranged to equate substantially along the axial longitudinal section area of tappet along the axial longitudinal section area of tappet and the tappet guide 29,30 that forms recess 63,64, therefore, can be that the whole circumference of tappet guide 29,30 is given enough rigidity with simple structure; Simultaneously, not forming 61,62 positions, upper-end surface of recess 63,64 and the position of recess 63,64 and all connected elements at the bending curve position in the recess 63,64 all is to form continuously with bigger bending radius, thereby can prevent because the formation of recess 63,64 causes stress to be concentrated.
And, because the upper- end surface 61,62 of tappet guide 29,30 is set than higher, so, can guarantee the axial length of big tappet guide 29,30, therefore, tappet guide 29,30 axially on, allow and set the lower end surface 65,66 of tappet guide 29,30 than higher, make tappet guide 29,30 lower end surface 65,66 near tappet 31,41 tappet guide 29,30 axially on by the position, underpart of the tappet 31,41 of cam 32,42 beginnings when pressing down near.Thus at the oil jacket 80,81 that between the inner bottom surface 22 of oil jacket 80,81 and cylinder head, can form respectively below the tappet guide 29,30 than large space.Therefore, when casting cylinder cover 20, the thicker core in the space by being formed for constituting oil jacket 80,81 has the advantage that is easy to guarantee core strength.
On the other hand, tappet guide 29,30 is integrally formed in the both sides of bearing portion 23,24, by forming integral body across bearing portion 23,24 and top sidewall 21 and 23,24 continuities of bearing portion respectively.Simultaneously, the position that links to each other with its perisporium with the diagonal positions of camshaft 27,28 spark plug conduit boss part 50 in vertical direction on form with spark plug conduit boss part 50 is whole continuously respectively, thereby can be easy to improve the rigidity of tappet guide 29,30, and realize the lightweight of tappet guide 29,30 self.
In addition, for each to tappet guide 29,30, have only the bottom 60,70 and the cylinder head 20 at the continuous position of its perisporium to be connected as a single entity, compared with prior art, the redundance that is used to support tappet guide 29,30 is few, therefore, can alleviate the weight of cylinder head 20 significantly, and, can simplify the surrounding structure of spark plug conduit 51 and boss part 50, form the space between bigger each several part.Therefore, can form the thicker core that is used for casting cylinder cover 20, thus,, also have the advantage that is easy to guarantee core strength from this respect.
As mentioned above, embodiment is illustrated.But form of the present invention is not to be defined in the foregoing description.For example, in the above-described embodiments, only formed the wall thickness of big (thick), still at the position, top of the tappet guide 29,30 that forms recess 63,64, also can be at the position that does not form recess 63,64, promptly near all sites the upper-end surface of tappet guide forms big wall thickness.But, thus,, will increase the weight of cylinder head 20 if the wall thickness of top integral body is bigger, therefore,, only form the wall thickness of big (thick) at the position, top of the tappet guide 29,30 that forms recess 63,64 preferably as above-mentioned embodiment.
Although the present invention is illustrated with reference to accompanying drawing and preferred embodiment, obviously, for a person skilled in the art, under the prerequisite that does not deviate from the spirit and scope of the present invention, can make various changes and variation to the present invention.Therefore, various change of the present invention, the content that changes by appending claims and equivalent thereof contain.
Claims (6)
1. tappet guide that on cylinder head, forms, on described cylinder head, comprise camshaft, be inserted with tappet in the described tappet guide, by described tappet by the rotatable support of bearing portion, make the cam operated inlet valve or the outlet valve of described camshaft, described tappet guide is characterised in that:
The described tappet that described tappet guide is directly driven by the cam of described camshaft along its axial lead, and, in the described also high upper-end surface, position that forms on axially than the top dead center of described tappet, simultaneously, on the part of described upper-end surface, form downward recess along the direction vertical with the centerline direction of described camshaft, thereby not with cam (32,42) rotary motion trace is interfered, and it is big to be formed with top wall thickness rate its underpart wall thickness at position of described recess at least.
2. tappet guide according to claim 1 is characterized in that, described a pair of tappet guide is respectively formed at the both sides of described bearing portion, and continues with described bearing portion on the centerline direction of described bearing portion at described camshaft.
3. tappet guide according to claim 1 is characterized in that described tappet guide is arranged to, make its lower end surface described axially on usually with position according to the lower end surface when cam begins to rise of the described tappet of described cam action near consistent.
4. tappet guide according to claim 2, it is characterized in that, described tappet guide adjacent is connected to the peripheral wall that is formed on described bearing portion both sides and across the bottom of the attachment portion of described bearing portion, with the boss part that is arranged on the described cylinder head and be inserted with the spark plug conduit formation one that continues.
5. tappet guide according to claim 1 is characterized in that described tappet guide is arranged to, and make to form the axial longitudinal section area of the axial longitudinal section area of the tappet at described recess position and the tappet that does not form described recess position and equates substantially.
6. tappet guide according to claim 1 is characterized in that, the upper-end surface (61,62) of described tappet guide (29,30) is lower than the top sidewall (21) of described cylinder head (20).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003419008A JP4131233B2 (en) | 2003-12-17 | 2003-12-17 | Tappet guide |
| JP2003419008 | 2003-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1629455A CN1629455A (en) | 2005-06-22 |
| CN100360766C true CN100360766C (en) | 2008-01-09 |
Family
ID=34781028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101013838A Active CN100360766C (en) | 2003-12-17 | 2004-12-17 | Tappet guide |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4131233B2 (en) |
| CN (1) | CN100360766C (en) |
| DE (1) | DE102004060910B4 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013207573A1 (en) * | 2013-04-25 | 2014-10-30 | Mahle International Gmbh | Bearing frame or cylinder head cover |
| DE102014216859B4 (en) | 2014-08-25 | 2022-06-02 | Adidas Ag | Metallic, additively manufactured footwear components for athletic performance |
| CN106224116B (en) * | 2016-10-12 | 2018-01-19 | 广西玉柴机器股份有限公司 | A kind of air cylinder head structure with spectacle tappet hole |
| CN106894908B (en) * | 2017-03-15 | 2021-04-09 | 上汽通用汽车有限公司 | Engine cylinder block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570669A (en) * | 1995-12-04 | 1996-11-05 | Chrysler Corporation | Cylinder head for an overhead camshaft internal combustion engine |
| JPH10280914A (en) * | 1997-04-01 | 1998-10-20 | Suzuki Motor Corp | Tappet guide hole structure of engine |
| US6470840B2 (en) * | 2000-03-13 | 2002-10-29 | Mazda Motor Corporation | Cylinder head structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT329323B (en) * | 1972-11-06 | 1976-05-10 | Denzel Kraftfahrzeug Wolfgang | CYLINDER HEAD FOR COMBUSTION MACHINERY |
| DE8326935U1 (en) * | 1983-09-20 | 1987-10-22 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart | Cylinder head for a preferably multi-cylinder internal combustion engine |
| JP2537205B2 (en) * | 1986-07-09 | 1996-09-25 | 本田技研工業株式会社 | Valve train for internal combustion engine |
| AT404387B (en) * | 1991-03-04 | 1998-11-25 | Avl Verbrennungskraft Messtech | Internal combustion engine having two inlet valves and one outlet valve per cylinder |
| JPH08158933A (en) * | 1994-11-30 | 1996-06-18 | Yamaha Motor Co Ltd | Four-cycle engine |
| JP3803288B2 (en) * | 2001-12-13 | 2006-08-02 | トヨタ自動車株式会社 | Variable valve mechanism |
-
2003
- 2003-12-17 JP JP2003419008A patent/JP4131233B2/en not_active Expired - Lifetime
-
2004
- 2004-12-17 CN CNB2004101013838A patent/CN100360766C/en active Active
- 2004-12-17 DE DE200410060910 patent/DE102004060910B4/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570669A (en) * | 1995-12-04 | 1996-11-05 | Chrysler Corporation | Cylinder head for an overhead camshaft internal combustion engine |
| JPH10280914A (en) * | 1997-04-01 | 1998-10-20 | Suzuki Motor Corp | Tappet guide hole structure of engine |
| US6470840B2 (en) * | 2000-03-13 | 2002-10-29 | Mazda Motor Corporation | Cylinder head structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004060910B4 (en) | 2014-10-16 |
| CN1629455A (en) | 2005-06-22 |
| DE102004060910A1 (en) | 2005-08-18 |
| JP2005180229A (en) | 2005-07-07 |
| JP4131233B2 (en) | 2008-08-13 |
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Legal Events
| 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 | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IP01 | Partial invalidation of patent right |
Commission number: 4W101359 Conclusion of examination: Claim No. 200410101383.8 of the patent for invention No. 1-4 and 6 is invalid, and the patent is valid on the basis of claim 5. Decision date of declaring invalidation: 20121109 Decision number of declaring invalidation: 19395 Denomination of invention: Tappet guide Granted publication date: 20080109 Patentee: MITSUBISHI JIDOSHA KOGYO Kabushiki Kaisha |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Tokyo Port Area, Japan Patentee after: Mitsubishi Jidosha Kogyo Kabushiki Kaisha Address before: Tokyo, Japan Patentee before: Mitsubishi Jidosha Kogyo Kabushiki Kaisha |