CN1381671A - Cam chain lifting device of internal-combustion engine - Google Patents
Cam chain lifting device of internal-combustion engine Download PDFInfo
- Publication number
- CN1381671A CN1381671A CN 02108783 CN02108783A CN1381671A CN 1381671 A CN1381671 A CN 1381671A CN 02108783 CN02108783 CN 02108783 CN 02108783 A CN02108783 A CN 02108783A CN 1381671 A CN1381671 A CN 1381671A
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- CN
- China
- Prior art keywords
- cam chain
- combustion engine
- push rod
- internal
- guiding tube
- 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.)
- Granted
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Abstract
The invention provides a cam chain lifter device to an optimum position without increasing an internal combustion engine in size. This cam chain lifter device for the internal combustion engine is constituted such that, in the internal combustion engine provided with an oil lock type cam chain lifter, a push rod 32 held slidably by a guide cylinder 34 is upwardly projected, the oil lock type cam chain lifter 31 is arranged in a cam chain chamber 9, and an oil reservoir 35 is formed so as to open at its upper side to an upper part of the guide cylinder 34 where the push rod 32 is projected and to communicate with an oil pressure chamber 36 inside the guide cylinder via an inside of the push rod 32.
Description
Technical field
The present invention relates to a kind of cam chain lifting device that is provided with the internal-combustion engine of oily locked type cam chain lift device (カ system チ エ-Application リ Off ).
Background technique
Oil locked type cam chain lift device for do not make reception from the push rod of the pushing force of cam chain than required retreat many, need often be full of the grease chamber of the guiding tube inside that keeps push rod with being free to slide and oil is locked by oil and work.
Have and forming oily reservoir especially at its place and the cam chain lift device is being immersed in example in this oil reservoir (Japanese kokai publication hei 11-280490 number, Japanese Patent Publication 63-14224 number, Japanese kokai publication sho 61-126138 communique etc.).
But, owing to must formation can immerse the oily reservoir of the size of cam chain lift device degree, it is hereby ensured that the place in its space is restricted, the configuration of cam chain lift device, the degrees of freedom of layout are little.
The situation that can not guarantee the space in the optimum position of cam chain lift device is also arranged, at this moment, described in above-mentioned communique, crankcase or cylinder block are bloated and form oily reservoir etc., like this, internal combustion engine main body maximizes.
Summary of the invention
The present invention makes in view of these points, and its objective is provides a kind of cam chain lifting device that cam chain lifting device can be configured in the internal-combustion engine of optimum position under the situation that internal-combustion engine is maximized.
In order to achieve the above object, the cam chain lifting device of the internal-combustion engine of first technological scheme of the present invention, this internal-combustion engine is the internal-combustion engine with oily locked type cam chain lift device, it is characterized in that, make the push rod that remains in the guiding tube be projected into the top with being free to slide, oily locked type cam chain lift device is provided in the cam chain chamber, the oily reservoir of opening wide above the guiding tube top that above-mentioned push rod is given prominence to is forming, this oil reservoir is communicated with the hydraulic chamber of guiding tube inside by above-mentioned push rod is inner.
Owing to be arranged in the oily reservoir that the cam chain lift device of cam chain chamber is opening wide above the outstanding guiding tube top of push rod is forming, therefore, dispersing become trapped in oily reservoir to the indoor oil of cam chain, the guiding tube inside of connection is full of and oil is locked by oil and work.
Because the hydraulic chamber's oily oily reservoir of supply to guiding tube inside is formed on the outstanding guiding tube top of push rod, therefore, the cam chain lift device itself becomes the structure of the compactness with oily reservoir, the degrees of freedom of the configuration layout of cam chain lift device is big, can cam chain lifting device can be configured in the optimum position under the situation that internal-combustion engine is maximized.
The cam chain lifting device of the internal-combustion engine of second technological scheme of the present invention, in above-mentioned first technological scheme, it is characterized in that, the top of above-mentioned guiding tube is to radially bloating, its top is formed groove with outer side opening, stop up the opening of the side outward of this groove with oily reservoir plate, form above-mentioned oily reservoir thus, the outside of above-mentioned oily reservoir plate is relative with the starter driven gear and play the effect of axial thrust portion.
When constituting oily reservoir owing to oily reservoir plate, the also relative effect of playing axial thrust portion with the starter driven gear, therefore be also used as oil cup and axial thrust portion, can reduce number of spare parts, reduce cost.
Description of drawings
Fig. 1 is the side view of cam chain chamber in left side of the internal-combustion engine of expression one embodiment of the invention.
Fig. 2 is the sectional drawing of cam chain chamber.
Fig. 3 be crankcase want portion's side view.
Fig. 4 is the sectional drawing of cam chain lift device.
Embodiment
Below, according to Fig. 1～Fig. 4 one embodiment of the invention are described.
As shown in Figure 1, lift-launch the body of not shown single cylinder OHC quartastroke engine 1 on two-wheeled about the outstanding cylinder block 3 that cylinder-bore is pointed to along general horizontal direction that is being provided with in the place ahead (in Fig. 1, being left) of the crankcase 2,2 cut apart, front end in this cylinder block 3 is covered with cylinder head 4, and the bolt 5 that screw thread is installed on the left and right sides crankcase 2,2 by connecting cylinder head 4 and cylinder block 3 from car body the place ahead is an one with cylinder head 4, cylinder block 3, left and right sides crankcase 2,2 joints.
Rotate freely ground axle suspension by ball bearing 7 on the left and right sides crankcase 2,2 and the bent axle 6 that points to the overall width direction.
As shown in Figure 2, setting-in ball bearing 7 in the round opening on being formed at the sidewall 2a of left and right sides crankcase 2, is enclosed within on the bent axle 6 inner ring of this ball bearing 7 outstanding to left.
The left side of the left side of the sidewall 2a of left crankcase 2 and cylinder block 3, cylinder head 4 is covered by chain guard 8, is forming shared cam chain chamber 9 in inside.
Be provided with AC generator 10 on the left end of the bent axle 6 in being projected into cam chain chamber 9, between the sidewall 2a of AC generator 10 and left crankcase 2, driving sprocket wheel 15 be inlaid on the bent axle 6.
On bent axle 6, left side and AC generator 10 at driving sprocket wheel 15 are closely supporting starter motor driven gear 12 by 11 of overrunning clutchs, and starter motor driven gear 12 is entrenched on the intermediate gear 13 and the power uniaxially of actuating motor not shown in the figures is delivered to bent axle 6.
As shown in Figure 1, the driven sprocket 16 that is sleeved on the camshaft 14 is being set in the cam chain chamber 9 of cylinder head 4, between this driven sprocket 16 and driving sprocket wheel 15, is setting up ring-type cam chain 17.
On the sidewall 2a of left crankcase 2, some oblique rear above bent axle 6 is provided with jut 21 cylindraceous highlightedly to left, by being threaded over the tensioner arms 23 that supporting axle 22 on this jut 21 can free pivot joltily supporting cam chain lifting device 20.
This tensioner arms 23 extends to the front and back of supporting axle 22, axle is supporting stretcher sprocket wheel 24 on the front end of the arm that forwards extends, this stretcher sprocket wheel 24 is from 17 engagements (with reference to Fig. 1) of last pushing cam chain 17 ground and this cam chain, and the rear that the extends to tensioner arms 23 tiltedly bar head 33 of the upper end of the push rod 32 in the cam chain lift device 31 of rear end and the oily locked type of the arm of below contacts.
As shown in Figure 3, the guiding tube 34 of the some tilted rearward of cam chain lift device 31 its relative verticals connect sideling left crankcase 2 sprocket wheel chamber 9 diapire be integrally formed, in the circular hole of this guiding tube 34, insert push rod 32 with being free to slide.
Guiding tube 34, its lower end is outstanding to the outside, and screw thread is installed with sealing bolt 41 in its lower ending opening, and with its lower ending opening sealing (with reference to Fig. 1, Fig. 4).
The top of guiding tube 34 is in the cam chain chamber 9 and is outstanding and form oily reservoir 35 to rectangular area radially.
As shown in Figure 3, the open upper end face that the rectangular area of guiding tube 34 bloats (dot and dash line Lc) is formed by approximate horizontal ground, the left side wall vertical ground of oil reservoir 35 is by incised notch, its left side side is opening also, thereby form groove 36, the breach face as mating face 37, is being contacted oil and storing plate 38 on this mating face 37, be used for the left opening of enclosed slot 36, only constitute an oily reservoir 35 top rectangular area opening.
Forming in the place ahead and to be used to install the jut 39 that oil stores plate 38 along the top of this guiding tube 34.
As shown in Figure 2, oil stores plate 38 its installation base end part 38a and is threaded on the jut 39 by bolt 40, the front end 38b that is bent into crank-like from this installation base end part 38a contacts with the mating face 37 of above-mentioned groove 36 and seals the left opening, constitutes oily reservoir 35.
The front end 38b of the left opening of the enclosed slot 36 of this oil storage plate 38 is forming the protuberance 38c that local side left bloats.
The oil reservoir plate 38 oblique rear below bent axle 6 as illustrated in fig. 1 is in the periphery circle of starter motor driven gear 12, as shown in Figure 2, front end 38b is relative with the right flank of starter motor driven gear 12, boosts the axial thrust portion of the axial displacement of motivation driven gear 12 till the right flank butt of protuberance 38c and starter motor driven gear 12 forms.
Cam chain lift device 31 is inserting push rod 32 as illustrated in fig. 4 with being free to slide in the circular hole of guiding tube 34, this circular hole is because towards oily reservoir 35 openings, push rod 32 becomes from the outstanding upward form in the bottom surface of oily reservoir 35.
Push rod 32 forms cylindric, is wearing a plurality of intercommunicating pore 32a in the central on the suitable length of portion, above-mentioned bar head 33 at the upper end open setting-in, is forming vent 32b near this bar head 33.
On the lower ending opening of push rod 32, between the ball seat 42 of cap shape and valve gap 44, can embed with moving about and watch a ball game 43.
On the diapire of ball seat 42 and valve gap 44, form opening 42a, the 44a of the degree that ball 43 can not deviate from, constituting the one-way valve of switching that ball 43 carries out the opening 42a of ball seat 42.
Folder is being established spring 45 between the lower end of sealing bolt on the lower end that is threaded over guiding tube 34 41 and push rod 32, is used for push rod 32 is suppressed upward.
The space of below that is clamping the ball seat 42 of this spring 45 constitutes hydraulic chamber 46.
Roughly half inserts in the guiding tube 34 because push rod 32 is set to it, any one of a plurality of intercommunicating pore 32a of central authorities is arranged in oily reservoir 35, therefore, oil reservoir 35 is by intercommunicating pore 32a and 32 interior connections of push rod, and the opening 42a that by the usual openings of ball seat 42 in the push rod 32 and the opening 44a of valve gap 44 are communicated with hydraulic chamber 46.
Oil in filling in guide cylinder 34, and the oil in the hydraulic chamber 46 is filled to second inner and oily reservoir 35 of the push rod 32 of insertion, can be filled to the upper-end surface by the guiding tube 34 shown in the dot and dash line LC of Fig. 4.
Cam chain lifting device 20 has above structure, is storing oil in the bottom of crankcase 2, and in cam chain chamber 9, oil is stored into uses the oil level degree shown in the dot and dash line Lo among Fig. 1, and the part of the guiding tube 34 of cam chain lift device 31 is immersed in the oil.
The upper end that the oil that splashes owing to revolution of the caused cam chain 17 of driving of the rotation of starter motor driven gear 12 and internal-combustion engine 1 etc. become trapped in guiding tube 34 is upward in the oily reservoir 35 of opening, constantly makeup oil.
Cam chain lifting device 20 is suppressed push rod 32 upward by the spring 45 of cam chain lift device 31, and is that fulcrum shakes with tensioner arms 23 with supporting axle 22, thereby tension sprocket 24 is pressed against on the cam chain 17, makes cam chain 17 have appropriate tensioning.
Because the elastic force pressure of spring 45 advances push rod 32, can tackle the elongation of cam chain 17 thus.
In cam chain 17 over-tension, when the elastic force that push rod 32 is subjected to revolting from the pushing force of cam chain 17 spring 45 is drawn back, ball seat 42 retreats with push rod 32, and the opening 42a that is in connected state is usually sealed by ball 43, and hydraulic chamber 46 closes into oil and stop push rod 32 excessive retreating.
In order positively to produce this oil lock function, must often be full of oil in the guiding tube 34.
Under the situation of the cam chain lifting device 20 of present embodiment, the oil that splashes in cam chain chamber 9 become trapped in the oily reservoir 35 of opening upward of upper end of guiding tube 34, thus makeup oil constantly.
Because oily reservoir 35 from oil to the hydraulic chamber 46 of cam chain lift device 31 that supply with is formed on the top of the outstanding guiding tube 34 of push rod 32, therefore, cam chain lift device 31 itself forms the structure of the compactness with oily reservoir, the degrees of freedom of the configuration layout of cam chain lift device 31 is big, can under the situation that internal-combustion engine is maximized cam chain lift device 31 be configured on the optimum position.
Because oily reservoir plate 38 also relatively constitutes the effect of axial thrust portion with starter motor driven gear 12 when constituting oily reservoir 35, therefore be also used as oily reservoir and axial thrust device, can reduce number of spare parts, reduce cost.
Claims (2)
1. the cam chain lifting device of internal-combustion engine, this internal-combustion engine is the internal-combustion engine with oily locked type cam chain lift device, it is characterized in that, make the push rod that remains in the guiding tube be projected into the top with being free to slide, oily locked type cam chain lift device is provided in the cam chain chamber, the oily reservoir of opening wide above the outstanding guiding tube top of above-mentioned push rod is forming, this oil reservoir is communicated with the hydraulic chamber of guiding tube inside by above-mentioned push rod is inner.
2. the cam chain lifting device of internal-combustion engine as claimed in claim 1, it is characterized in that, the top of above-mentioned guiding tube to radially bloat and with its top and outside side opening and form groove, stop up the opening of the side outward of this groove with oily reservoir plate, form above-mentioned oily reservoir thus, the outside of above-mentioned oily reservoir plate is relative with the starter driven gear and play the effect of axial thrust portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001116887A JP4578016B2 (en) | 2001-04-16 | 2001-04-16 | Cam chain lifter device for internal combustion engine |
| JP116887/2001 | 2001-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1381671A true CN1381671A (en) | 2002-11-27 |
| CN1184411C CN1184411C (en) | 2005-01-12 |
Family
ID=18967546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02108783 Expired - Fee Related CN1184411C (en) | 2001-04-16 | 2002-04-02 | Cam chain lifting device of internal-combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4578016B2 (en) |
| CN (1) | CN1184411C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101981291B (en) * | 2008-03-31 | 2013-02-06 | 本田技研工业株式会社 | Internal combustion engine for small-sized vehicle |
| US9375358B2 (en) | 2012-12-10 | 2016-06-28 | The Procter & Gamble Company | Absorbent article with high absorbent material content |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5009834B2 (en) * | 2008-02-25 | 2012-08-22 | 本田技研工業株式会社 | Internal combustion engine |
| JP5122434B2 (en) * | 2008-12-26 | 2013-01-16 | 本田技研工業株式会社 | Cam chain tensioner device for internal combustion engine |
| JP5219883B2 (en) * | 2009-02-24 | 2013-06-26 | 本田技研工業株式会社 | Starter motor arrangement structure of internal combustion engine |
| JP5480023B2 (en) * | 2010-06-11 | 2014-04-23 | 本田技研工業株式会社 | Internal combustion engine for saddle-ride type vehicles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3354357B2 (en) * | 1995-08-09 | 2002-12-09 | 本田技研工業株式会社 | Cam chain tensioner device for 4-cycle horizontal engine |
-
2001
- 2001-04-16 JP JP2001116887A patent/JP4578016B2/en not_active Expired - Fee Related
-
2002
- 2002-04-02 CN CN 02108783 patent/CN1184411C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101981291B (en) * | 2008-03-31 | 2013-02-06 | 本田技研工业株式会社 | Internal combustion engine for small-sized vehicle |
| US9375358B2 (en) | 2012-12-10 | 2016-06-28 | The Procter & Gamble Company | Absorbent article with high absorbent material content |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1184411C (en) | 2005-01-12 |
| JP4578016B2 (en) | 2010-11-10 |
| JP2002309960A (en) | 2002-10-23 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050112 Termination date: 20150402 |
|
| EXPY | Termination of patent right or utility model |