CN1211670A - Valve straight-motion type engine - Google Patents
Valve straight-motion type engine Download PDFInfo
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- CN1211670A CN1211670A CN 98119151 CN98119151A CN1211670A CN 1211670 A CN1211670 A CN 1211670A CN 98119151 CN98119151 CN 98119151 CN 98119151 A CN98119151 A CN 98119151A CN 1211670 A CN1211670 A CN 1211670A
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- cam
- valve
- hole
- measuring tool
- type engine
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Abstract
A valve straight-motion type engine. After a cam chamber 7 of a main body constituting an engine is formed by casting, a prepared hole 92 of a measuring apparatus inserting/ passing hole 91 is bored in the direction orthogonally crossed with a shaft line of cam shaft 6 from the side of this front face 12 and a relief part 90 is formed at the part crossed with the cam chamber 7. The location of the measuring apparatus inserting/passing hole 91 is a height in which a sliding part exists at the time of a valve lift of a cam 27 and a valve lifter 25 and the relief part 90 does not interfere with the cam profile 97 of the cam 27. The inner diameter of the prepared hole 92 is made a size in which the width of the relief part 90 is made larger than thickness width of the cam 27 and a tappet clearance measuring jig can be inserted. A cap 95 is freely attachably/ detachably mounted on the opening part of the measuring apparatus inserting/ passing hole 91 via an O-ring 96.
Description
The present invention relates to valve straight-motion type engine, this motor is formed with the side amount instrument inserting hole that the instrument of using the tappet clearance of camshaft is measured in insertion.
As this example, Japanese Patent Application is opened in clear 60-192202 number the spy, shows to form respectively on cylinder head to insert hole and the cam profile yielding structure partly that the tappet clearance measuring tool is used.Also have,, have the situation that the filler face seals must be set on camshaft owing to be provided with the patchhole of such tappet clearance measuring tool.
In the example of above-mentioned prior art, insert the hole that the tappet clearance measuring tool uses and the yielding part of cam profile owing to must process respectively, so the machining period increase.Also have, because the filler face is set on camshaft, the structure of sealing complicates.Therefore, solve the goal of the invention that this problem becomes the application.
In order to solve above-mentioned problem, first scheme of the invention of the application's valve straight-motion type engine is: a kind of internal-combustion engine, it has valve tappet, this valve tappet is arranged between the camshaft and suction air valve of motor, and the revolution of following camshaft applies axial promotion to aforementioned suction air valve, it is characterized in that: the measuring tool inserting hole is set, and this inserting hole is being communicated with towards above-mentioned camshaft and valve tappet from the outside.
Alternative plan of the present invention is on the basis of first scheme, to it is characterized in that: be provided with on the measuring tool inserting hole and cover member.
Third party's case of the present invention is on the basis of first scheme, to it is characterized in that: the internal diameter of above-mentioned measuring tool inserting hole is bigger than the thickness amplitude that is located at the cam on the camshaft.
Cubic case of the present invention is in above-mentioned internal-combustion engine, to it is characterized in that: on the part of the cylinder skull on the axis extensions in the valve tappet hole that valve tappet is slided, the cam peep hole that connects towards cam chamber is set.
The 5th scheme of the present invention is on the basis of cubic case, to it is characterized in that: above-mentioned cam peep hole is made the diameter roughly the same with valve tappet, and this cam peep hole is sealed with covering member.
According to first scheme of the present invention, the yielding part of the measuring tool inserting hole double as cam profile that insertion tappet clearance measuring tool is used.Therefore, be used for the yielding processing partly of the following hole processing double as cam profile of measuring tool inserting hole, its result can reduce machining period.
According to alternative plan of the present invention, cover member owing on the measuring tool inserting hole, be provided with, so make seal construction become simple.
According to third party's case of the present invention, because the internal diameter of measuring tool inserting hole is greater than the thickness amplitude that is located at the cam on the camshaft, therefore, the processing in the following hole by the measuring tool inserting hole, positively the yielding part of machining cam profile.
According to cubic case of the present invention, owing on a part that makes the cylinder skull of valve tappet on can the axis extensions in slidable valve tappet hole, the cam peep hole that connects towards cam chamber is set, so can easily process the valve tappet hole, simultaneously, when measuring valve clearance etc., have as the function of confirming the peep hole that cam position is used.
The 5th scheme of the present invention, owing on the basis of cubic case, above-mentioned cam peep hole is made the diameter roughly the same with valve tappet, and this cam peep hole is sealed with covering member, therefore can simplify the structure of sealing.
Accompanying drawing is simply described as follows:
Fig. 1 is the sectional view of the structure of measuring tool inserting hole and yielding portion;
Fig. 2 is the whole sectional view of the motor of one embodiment of the invention;
Fig. 3 lays down the figure that face is looked on the right side after the inlet cover;
Fig. 4 is the sectional view of main body.
Below, explanation is applicable to an embodiment of the water-cooled four-cycle float tolerance motor of equipment of small motor bicycle with reference to the accompanying drawings.Fig. 1 is the sectional view of valve tappet hole and measuring tool inserting hole part; Fig. 2 is the whole sectional view of the motor of one embodiment of the invention, and Fig. 2 is the figure of the main body right flank after inlet cover is laid down, and Fig. 3 is the figure of the main body left surface after the cam chain cover is laid down, and Fig. 4 is the sectional view of main body.
The general arrangement of this motor at first, is described according to Fig. 2 to Fig. 4.Consisting of of this motor, by casting methods such as casting formings with the suitable metal forming body 1 of cuboid shape roughly such as aluminum alloy, on two parallel relative sides of the cardinal principle that forms along its length direction, be installed into air chamber cover 2 and cam chain lid 3 and assemble, be installed in then on the crankcase (saving among the figure).
The casting of main body 1 usefulness integrally forms cylinder portion 5 and the head 8 with cam chamber 7, and cylinder portion 5 is accommodated the piston 4 that links to each other with bent axle (saving among the figure) by connecting rod 4a, and cam chamber 7 is accommodated camshaft 6 free to rotately.
In this application, the part that special provision covers the cam chamber 7 in the head 8 is a skull part 9, and then for convenience's sake, each face for main body 1, the face that claims air inlet chamber cap 2 to be installed is a right flank 10, and the face that cam chain 3 is installed is left surface 11 (Fig. 6), in two relative faces of being clamped by these two faces, the face that claims installation radiator described later is front 12, and another side is the back side 13 (Fig. 3).Also have, the outer surface of the apex portion of regulation skull part 9 is an end face 14, and the face that is contained on the crankcase is bottom surface 15.
In cylinder portion 5, in that 15 sides to the roughly intermediate portion of the length direction of main body 1 forms cylinder 16 from the bottom surface, the firing chamber 17 that forms in a side of the head 8 of the inside of this cylinder 16 part is communicated with intakeport 18 and relief opening 19, the opening of firing chamber 17 sides of each mouthful opens and closes with Aspirating valves 20 and outlet valve 21, and axis C1, the C2 of each valve forms the valve angle of regulation with respect to cylinder-bore axis C.Symbol 20a and 21a are the valve rod retainer.
Intakeport 18 is communicated with the air suction way 22 that forms on air inlet chamber cap 2, and this air suction way 22 extends to foreign side obliquely at the extending direction of intakeport 18, links to each other with vaporizer (saving among the figure) by suction tude 23.Relief opening 21 is towards extending agley with the direction of suction pump 18 approximate vertical, is connected with outlet pipe 24 on 13 overleaf.Symbol 29 among Fig. 2 and 3 is an igniter plug.
The direct-acting type of the driving of each valve for directly driving by valve tappet 25, the 26 usefulness cams 27,28 that are located on the shaft end separately, the camshaft 6 that is formed with these cams 27,28 passes between right flank 10 and the left surface 11, is supported by bearing 30,31 on two open ends of the cam chamber 7 that forms taper.Each slip surface of cam 27,28 is made the corresponding plane of inclination of slip surface with separately valve tappet 25,26.Between end and air inlet chamber cap 2 of camshaft 6, form oil supply part 6a.
Outstanding in the chain chamber 32 that the other end side direction of camshaft 6 forms between cam chain lid 3 and left surface 11, in this outstanding end, cam sprocket wheel 33 is housed with screw 34.This cam sprocket wheel 33 is hung by the driving sprocket wheel that is provided with on cam chain 35 and the unshowned in the drawings bent axle and is closed.
On the axis C1 of each valve in skull part 9 and the extensions of C2, form coaxial and have a cam peep hole 36,37 with the roughly the same diameter of each valve tappet 25,26 with separately valve axis C1 and C2, by these cam peep hole 36,37 processing valve tappet holes 84,85, simultaneously, when the component parts of assembled valve, can insert logical and assemble these parts with this hole, improve assembling.
Because the lid 38,39 of make and break cam chamber 7 seals with screw clamp by sealing respectively, so can make the simple structure of sealing.
Near the part firing chamber 17 of main body 1, the pump of the circle that forms on the wall portion of the cam chain lid 3 of facing main body 1 is installed in the recess 41, contain water pump 40, periphery by the flange 42 that will form on the part of the resinous lid that forms water pump 40 profiles is thickly chimeric with O shape circle liquid, makes water pump at pump sealing between the recess 41 is installed.
The pump housing 43 covers the water jacket 45 that pump is installed recess 41 some opening of place, on the middle body of the pump housing 43, be equipped with impeller 46, it can be supported with pump shaft 47 one with rotating freely, and the water passage 43a from the straight line opening sinks cooling water to water jacket 45 in the central part office of the pump housing 43.
In the protruding part 48 of one end free rotary ground supporting of pump shaft 47 on the tab-like periphery wall that is formed in cylinder 16.It is outstanding in chain chamber 32 that the other end of pump shaft 47 is crossed cam chain 35, and magnet ring 49 is set around it, and by around it, covering the part with the resinous lid of flange 42 all-in-one-pieces circularly, and make small diameter portion 50.The outstanding end of this small diameter portion 50 is bearing in the circular fit recess 51 that forms on the cam chain lid 3 by chimeric.
On the outer peripheral portion of small diameter portion 50, be provided with the sprocket wheel 53 that incorporate water pump is used on all sides of magnet ring 52 within it, and drive with cam chain 35.The wheel hub periphery of the sprocket wheel 53 that water pump is used is accommodated in the part 55 by the water pump that bearing 54 is housed in the circle that forms on the cam chain lid 3 with rotating freely.
When magnet ring 52 and water pump rotated integratedly with sprocket wheel 53, then the magnet ring 49 in the small diameter portion 50 was rotated integratedly by the magnetic force combination, and thus, by making impeller 46 rotations with magnet ring 49 all-in-one-piece pump shafts 47, water pump 40 becomes drive condition.Water pump 40 is provided with by the front 12 in main body 1, not shown radiator makes water jacket 45 pump circulation of cooling water to air inlet chamber cap 2 sides.
As shown in Figure 4, on the head 8 of main body 1, formation accommodate each valve tappet 25,26 valve tappet hole 84,85, and from they front end continuously and the valve rod retaining hole 86,87 of the minor diameter that extends to intakeport 18 and relief opening 19, these holes separately are provided with along valve axis C1 or C2, the prolongation of each valve axis C1 or C2 and the axis of camshaft 6 (central axis of cam chamber) intersect and extend, skull part 9 places on its prolongation form cam peep hole 36,37.
Each upper end portion of 84,85 forms the yielding part 90 that roughly becomes the semicircle arcuation in the valve tappet hole.This makes a concession part 90 as shown in Figures 1 and 2, is formed by the following hole 92 of in-process measurement instrument inserting hole 91, and this inserting hole 91 is bored a hole towards the sliding parts of the upper-end surface of cam 27,28 and valve tappet 25,26 from front 12 sides of main body 1 and formed.
This measuring tool inserting hole 91 is the holes that are used to insert the tappet clearance measuring tool, the sliding parts of the cam 27,28 when being in valve stroke and the upper-end surface of valve tappet 25,26 be located at be present in measuring tool inserting hole 91 prolongation in the position on, and, the internal diameter of measuring tool inserting hole 91 can freely insert the valve tappet clearance measurement tool when pad 93 (Fig. 2) is regulated, and than the thickness amplitude separately of cam 27,28 big (Fig. 2).
On the inner peripheral surface of measuring tool inserting hole 91, form internal thread 94, herein, can be equipped with by O shape circle 96 with freely installing and removing and cover 95.
As Fig. 1 illustrates clearly, the following hole 92 of measuring tool inserting hole 91 is made with the bottom of the cam profile 97 of cam 27,28 and is overlapped, the internal face 98 that forms circular-arc cam chamber 7 along the outside of cam profile 97 then links to each other with the yielding part 90 of measuring tool inserting hole 91, make a concession on the part 90 at this, the cam profile 97 of cam 27,28 can not interfere ground back and forth.
The following describes the effect of present embodiment
After forming the cam chamber 7 of main body 1 with die casting, from its front 12 sides when offering the following hole 92 of measuring tool inserting hole 91 with the direction of the axis normal of camshaft 6, form in the part that intersects with cam chamber 7 and to make a concession part 90.
This cam profile separately 97 of making a concession part 90 and cam 27,28 does not interfere.Therefore, because the yielding part of measuring tool inserting hole 91 double as cam profiles 97, only processing is used for the following hole 92 of valve measuring tool inserting hole 91, just can carry out the processing of the yielding part of cam profile 97, so can reduce machining period.
And, because the internal diameter that will form the following hole 92 of measuring tool inserting hole 91 is done greatlyyer than the thickness amplitude of cam 27,28, so process the yielding part 90 of machining cam profile 97 positively just by following hole to valve measuring tool inserting hole 91 usefulness.
Can utilize this measuring tool inserting hole 91 to insert the tappet clearance measuring tool, measure the tappet clearance at any time, if necessary, also can adjust pad 93 thereafter.In this measuring tool inserting hole 91, owing to can lid 95 freely be installed with installing and removing by O shape circle 96, and,, can make sealing configuration simple so on camshaft 6, do not need sealing with the open part sealing.
Owing on the skull part 9 on the axis prolongation in the valve tappet hole 84,85 that valve tappet 25,26 is slided, the cam peep hole 36,37 that connects with cam chamber is set, so process valve tappet hole 84,85 easily, simultaneously, when measuring valve clearance etc., have as the function of confirming the sight hole that cam position is used.
Have again,, simultaneously, seal these cam peep holes 36,37 with cover 38,39, so can do sealing configuration simply because above-mentioned cam peep hole 36,37 is made the diameter roughly the same with valve tappet 25,26.
The application's invention is not limited to the various embodiments described above, but can carry out various modification, and for example, casting method not necessarily must be the aluminium die cast, also can be to use other known casting method of sand mold etc.Also having, also can be the motor of DOHC form.
Claims (5)
1. valve straight-motion type engine, it has valve tappet, this valve tappet is arranged between the camshaft and suction air valve of motor, and the revolution of following camshaft applies end thrust to aforementioned suction air valve, it is characterized in that: be provided with the measuring tool inserting hole, this inserting hole is communicated with from the outside towards the contacting part of above-mentioned camshaft and valve tappet.
2. valve straight-motion type engine as claimed in claim 1 is characterized in that: be provided with on the measuring tool inserting hole and cover member.
3. valve straight-motion type engine as claimed in claim 1 is characterized in that: the internal diameter of above-mentioned measuring tool inserting hole is bigger than the thickness amplitude that is located at the cam on the camshaft.
4. a valve straight-motion type engine is characterized in that: on the part of the cylinder skull on the axis extensions in the valve tappet hole that valve tappet is slided, the cam peep hole that connects towards cam chamber is set.
5. valve straight-motion type engine as claimed in claim 4 is characterized in that: above-mentioned cam peep hole is made the diameter roughly the same with valve tappet, simultaneously this cam peep hole is sealed with covering member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24906197A JP3836226B2 (en) | 1997-09-12 | 1997-09-12 | Valve direct acting engine |
| JP249061/97 | 1997-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1211670A true CN1211670A (en) | 1999-03-24 |
| CN1089847C CN1089847C (en) | 2002-08-28 |
Family
ID=17187436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98119151A Expired - Fee Related CN1089847C (en) | 1997-09-12 | 1998-09-11 | Valve straight-motion type engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3836226B2 (en) |
| CN (1) | CN1089847C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6368274B2 (en) * | 2014-09-30 | 2018-08-01 | 本田技研工業株式会社 | Camshaft support wall structure of internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60192202A (en) * | 1984-03-13 | 1985-09-30 | Sekisui Jushi Co Ltd | Length measuring instrument with correcting function |
-
1997
- 1997-09-12 JP JP24906197A patent/JP3836226B2/en not_active Expired - Fee Related
-
1998
- 1998-09-11 CN CN98119151A patent/CN1089847C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3836226B2 (en) | 2006-10-25 |
| JPH1181931A (en) | 1999-03-26 |
| CN1089847C (en) | 2002-08-28 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |