JPS6170111A - Valve spring seat of four-cycle engine - Google Patents

Abstract

PURPOSE:To easily assemble a valve spring seat, by providing holes in a pitch corresponding to the pitch of a valve guide in a sheet of plate and forming a plurality of the valve spring seats by the single sheet of plate. CONSTITUTION:A sheet of plate 250, providing holes 252 in a pitch corresponding to the pitch of a valve guide provided in a cylinder head, is arranged between a valve seat and a valve spring in a cylinder head. In this way, a valve spring seat, in which a single sheet of the plate 250 serves as the plural spring seats, is easily assembled while prevented from wearing by preventing the seat from simultaneously turning together with the spring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a pulse spring seat installed in a cylinder head of a four-stroke engine.

[Prior art]

Conventionally, in a 4-stroke engine, each valve spring seater, which has a roughly disc-shaped valve spring seat with a hole into which a valve guide is inserted, and the pulp seat formed in the cylinder head are each equipped with a valve spring seat. Ta. That is, if a plurality of valve seats supporting the valve guide are formed solidly,
A corresponding number of pulp sorling sheets are required.

In this way, according to the traditional pulp spring seat,
Because each valve seat had to be fitted with a separate valve spring seat, the cylinder head assembly process was extremely tedious.

In other words, with conventional pulp spring seats, when the engine is started, the spring seat rotates with the valve spring due to the repeated impact from the valve spring, which causes the valve seat H and the spring seat to wear out. There was a drawback.

[Purpose of the invention]

The present invention overcomes the above-mentioned problems of the conventional pulp spring seat, and provides a valve spring seat for a four-stroke engine that simplifies the assembly process of a cylinder head and is pressurized to prevent slippage. purpose.

[Structure of the invention]

In order to achieve the above-mentioned objectives, the present invention aims to achieve the above-mentioned objectives.

Holes with a pitch corresponding to the pitch of the valve guide are formed in the plate, and this plate is placed between the valve seat and the pulp sprinkling as a valve spring seat.

〔Example〕

An embodiment of the valve spring seat according to the invention will be described below.

Figures 4 and 5 show a cylinder head (1) covered with an uninvented pulp spring seat, especially for parallel 4-cylinder, 4-valve DOHC cylinders, which are often installed in motorcycles.
This shows the cylinder head of a double overhead camshaft type 3 engine.

Exhaust port 1Ill of this cylinder head 10
1 (arrow A), the inlet port mist (arrow B), and the button 1, as shown in FIG. is formed. Furthermore, a bearing portion for a rocker shaft (not shown) that supports each rocker arm on the exhaust side and inlet side is formed at the lower part of each of the bearing portions 12 and 14, respectively.

On the other hand, on the circumferential surfaces of the bearings 12 and 14, jet holes 16 for lubricating oil, which are pumped through an oil gear rally (not shown) formed in the cylinder head 10, are formed, respectively.

Further, in the center S of the surface of the cylinder head 100 shown in No. 401JK, there is a 22°2
4.26 and 28.30 are formed, respectively. These recesses 2) , 22 , 24 , 26 , 28 ,
:[ indicates the 51st gK combustion chamber 32 , 34 , 36 ,
In the partially cut-away front view of the cylinder head 10, the 6th hole is formed in the part located almost above the cylinder head 1.
As shown in the figure, the range including the bore diameter of the valley combustion chamber 32° 34. 36.
6 and 38 (excluding the cylindrical spark plug mounting boss 40 and 42β4.46). Therefore, the above-mentioned valley recess 2I).

..., each of the 30 surroundings, 22m, Mudoro, Base A, Road A.

The nose 30 is in contact with the peripheral surface of the pulp seat 50X that supports the exhaust valve and the pulp seat 52 that supports the inlet pulp as shown in Figure 4, and the nose is in contact with the peripheral surface of the pulp seat 50X that supports the exhaust valve and the pulp seat 52 that supports the inlet pulp as shown in Figure 6. , ah, plug seat 80 formed every north
It will be adjacent to the surrounding area. When the lubricant oil is supplied from the oil supply I@ passage described above, this oil flows into the valley recess, 22゜24.26,2
8.30 km, this stagnant oil will cause damage to the areas around the combustion chambers 32, 34, 36, and 3s (Fig. 5), and around the valve seats, 52, and plug seats. Heat is absorbed and the main portion of the cylinder head 10 is cooled. -10,000, as shown in FIG. 4, the above-mentioned valley recesses b, Zz, 24, 26.

A, each circumferential wall S of 30 is a, 22m, mua, aa, 1゜30h. 62, 64
.

66 , 6B , 70 , 72 , and 74 are formed, including a recessed portion formed at a position facing both left and right ends of the cylinder head 10 via a cam chain 90 .

Jun, 26, 30 discharge holes 60 , 66 , 68 , 74
are discharge passages (material), 82 , 84 , 86 k, and stud bolt insertion holes 90 , 92 , 94 , 9
It is connected to 6. Therefore, the recesses 21J, '24,
26, 31: JK supplied oil is discharged from the discharge hole 60
, 66 , 68 , 74 X and discharge passages 80 , 82
.

84.86'& through hole 90 for stud bolt,
92.

%, 96%, and is returned to the engine oil pan via this insertion hole, 92°94, 96°. - 10,000, the discharge holes 62 and 64 of the recess n and 28
.

70, 72 c, discharge passage 100, 102, 10
4 and 106', and ball discharge passages 110 and 112 formed on the exhaust port side are connected to each other by ML.

These raw discharge passages 110° and 112 are respectively formed on the cylinder head IQ cloth surface between the valley exhaust boats as shown in No. 6-. Further, the discharge passage 100,
102 , 104 , 106 are eight formed in contact with the wall surface K11aI of the exhaust port formed in the cylinder head 10 , so that the oil supplied to the recesses 22 , 28 flows through the discharge passages 100 , 102 , 104 ,
ll! is discharged into the main discharge passage 110°112 through 106! ! At the same time, the exhaust port is also cooled by suctioning the silence generated in the air seast boat.

R1 The main discharge passages 110 and 112 have recesses.

2BKi'A-f7: r discharge passage 100, 102,
In addition to 104 and 106, as shown in Fig. 4 and Fig. 6, there is a cylinder head lOK above the exhaust port.
Opening fB 120 .

122. Valley discharge passages 132, 134, 136, 138 having 124, 126, 128, 130
, 140, 142 are in communication with each other, and therefore the oil flowing above the exhaust port of the cylinder head 10 is transferred to each of the discharge passages 132, 134.

136, 138, 140 V-through discharge passage 11
0,112. Note that in FIG. 4, reference numerals 150 and 152 are used.

154, 156, 158, 160, 162,
Reference numeral 164 denotes the insertion holes of the studs (not shown), with percentage numbers 170, 172, and 174.

176 are the ignition plug mounting bosses 40, 42, 4, respectively.
4. This is a flange portion formed on the upper part 1c of 46. And these flange parts 170, 172, 174, 1
76 K, respectively, the oil is
Oil supply passage Q, which will be described later, supplies oil inside the side.
) A hole 180 is formed in each case. Also, in FIG. 5, the symbols 190, 192, 194, 196
are exhaust seats), 52, 54 respectively.
, 56, the holes 190, 19
2, 194, and 196 are continuously discharged inside the ignition plug mounting bosses 40, 42, 44, and 46 shown in the VG4 diagram. In addition, in FIG. 6g and FIG. 4, symbols 210 and 21
2.

214, 216, 218, 220 are respectively,
Each of the recesses 21. l.

At the boss section installed inside 221M, 26, 28.30,
These boss portions 210 , 212 , 214 , 216 ,
218 and 220K are respectively female threaded portions 210a r
212m + 2141L + 216a r 21
8a +220a (Fig. 4) is formed. These female screw portions 210a, 212a, 214a,
Reference numerals 216a, 218a, and 220m are female screw parts for mounting a plate-shaped lid 230 shown in the enlarged plan view of FIG. Concave portions 22, 24 degrees and concave portions 26, 28. are formed symmetrically on the left side of the chain 90Y.
30 and is formed in a shape that covers each independently.

Note that this lid body 230 is formed to have a U-shaped cross section to increase the mechanical iML. In addition, this lid body 2
30K is a hole 232 for inserting a mounting bolt, and vkA
Hole 23 for inserting the groove that forms the oil supply passage
4 are formed respectively. Therefore, this cover body 230v is inside the cylinder head IO shown in FIG. ! When the cover body 2 is attached, as shown in the enlarged plan view of the main part in FIG.
By 30.

Each recess 20, 22, 24, 26, 28, 30 will be closed. In this way, when the lid body z30'''C'' covers the concave part for storing oil, the stored oil will flow into the concave part.
22 degrees, 26, 28, and 31 into the interior of the cylinder head 10 and are prevented from scattering.

240 is the mounting bolt of the lid body 230. On the other hand, in the cylinder head IO mentioned above.

As shown in FIG. 2 which is an enlarged plan view of FIG. 1 and a side view thereof, a plate-shaped valve seat 250 according to the present invention is used. In this valve seat 250, a plurality of holes 252 into which the valve guide is inserted are formed at a pitch corresponding to the pitch of the pulp guide, and the cross section of the casing is formed in a 5-shape to increase mechanical strength. has been done. FIG. 3 is a plan view showing the state in which the pulp sear) 250' is charged into the cylinder head IO, and the fourth
The same parts as those in the figure and M8 factor are indicated by the same reference numerals. Note that this valve seat 250 is oriented toward the pulp @kK by a valve spring (not shown).

Next, M+J recesses 22, 24, 26, 28, . . . are formed in the cylinder head 10. I will explain about the oil supply passage that supplies oil to the inside.

9 and 10 are a top view and a bottom view, respectively, of a cylinder head cover 260 that covers the cylinder head 0 shown in FIG. 4.

The cylinder cover 260 is formed so as to cover seven surfaces of the cylinder head 10 shown in FIG. 4, and a blow pipe gas extraction hole 262 is formed in the center thereof. In addition, in the central pocket, there are insertion holes 270, 272, 2 for the ignition plug and a tool for attaching and removing the ignition plug.
74 and 276 are formed. Each insertion hole 2
On the peripheral surfaces of 70 , 272 , 274 , 276 , there are guide collars 270 & 27 for the ignition plugs and the bosses for installing the ignition plugs.
2m.

274m and 276m are formed respectively. −
10, on the bottom of this head cover 260.
Is the oil fed under pressure from the oil supply device D, not shown? Oil supply passages 280 and 282 are formed, respectively, to guide the central portion of the cylinder head cover 260. These oil supply passages 280, 282
One end of each is formed on the cylinder head cover 260 on the inlent boat side and has a refill hole 290, 2.
92 Ka, and the Taniike store branches out and has insertion holes for spark plugs 270, 272, 274, 27.
Flange portions 270b and 272b formed in 6
, 274b, 276b. These flange portions 270b, 272b, 274b, 27
6b K is the cylinder head cover 260 & cylinder head It) (Fig. 4) Insertion holes 310 , 312 , 314 , 316 for bolts (transported by land) for fixing K
318, 320, 322, 324-1) i, respectively formed S, the oil 91-ma path 28o.

The other branched end of 282 is inserted into these insertion holes 310 and 31.
2.

314, 316, 318, 320, 322,
It is connected to 324.

Therefore, as shown in the arrow, 2 points, 292 points, 292 points.
・Oil supplied from the oil supply passages 280 and 28
2' through the insertion holes 310 and 312, respectively.
, 314 , 316 .

318, 320, 322, and 324.

Note that these insertion holes 310 , 312 , 314 ,
316, 318.

320, 322, 324 are mounting bosses 40, 42 shown in FIG.

44, 46 flange portions 170, 172, 17
4, 176K holes and 180K holes are formed at opposing positions, respectively. H1 91st VN and 1st
In Figure 0, the reference numeral 330 indicates the cylinder head cover 26.
This is an insertion hole for a fixing bolt for fixing the cylinder head 10 (FIG. 4). - million, cylinder head cover 26
0 said insertion holes 310 , 312 , 314 , 316
, 318 , 320 , 322 .

The oil guided to the cylinder head cover 2
60 is attached to the cylinder head] ()
]Figure 11! As shown in FIG. 12, which shows an enlarged section 1 and a DD sectional view thereof, the cylinder head tightening bolt 3
40K formed oil passage 3+12 and 7972 parts 170, 172, 174, 176 K type x stt
Nomoi 1'344 fitted in hole 180? Through,
Valley recess formed in cylinder head 10, η, 24.
Ah, the county is supplied to the barrier. Note that gl (in the cylinder head 10 shown in Fig. 11, the flange portions 170, 172
, 174 , 176 : (lil, #
The oil is transferred to the concave portions 20, 2 through the arm ignition 344.
2, 24. Lead to 26, 28, 30113 <yo') KI-
fL is, of course, No arm Iso 344? Each flange portion 170 , 172 , 174 , 176 is added to each recess 22 , 24 without using it.

In addition, the tightening bolt W shown in Fig. 28 and Fig. 13th
As shown in the enlarged partial cross-sectional perspective view of the oiling bolt 340 shown in FIG.
42 is formed on the circumferential surface 340 of this bolt 340.
Oil entering from a is guided to the lower end of the bolt 340 as shown by the arrow. In addition, in Fig. 11 and Fig. 4!12, Fig. 4 (2), Fig. 6, Fig. 81 Wolf, Fig. 3 S and Fig.
The same parts are indicated by the same symbols.

- 10,000, cylinder head 1 (l valley recess 2Ll, 22
, 24, 21j.

A2. As mentioned above, the intelligently supplied oil is applied to each of the recesses 211, η, and the peripheral wall portions of the holes 211 and 211, respectively.

22a, 24a, 26a +28m, 311Ja
K formed discharge holes 60, 62, 64, 66,
6B, 70, 72, 74 (Figure 4)
Stud bolt insertion holes 90 , 92 , 94 .

96 or the main exhaust passages 110, 112, the internal pressure is discharged, and is further returned to the engine oil supply via an oil return passage (not shown).

In order to keep the height of the east body as low as possible, the engine mounted on a motorcycle is mounted at an angle of 10,000 degrees in the normal direction of travel, as shown by the horizontal line EE in Figure 12. The cylinder head 10 is slanted so that the exhaust side is lower. Therefore, after lubricating other sliding parts such as the camshaft, the oil discharged into the cylinder head also flows into the recess. Similar to the temporarily stored oil, the drain holes 120, 122, 124, shown in FIG.
126, 128, and 130, and the internal pressure of the main discharge passage 11O1112 is discharged through the discharge hole.

In addition, in the above actual example, as shown in FIG.
Although the bottom surfaces 400 of Nos. 2, 24, 26, 28, and 30 were cleaned and finished into a flat shape on the surface of the combustion chamber, the concave portions 21J, 22, 24, 2ti, and 28° were temporarily stored at the barrier. In order to increase the contact surface between the oil and the bottom surface 400 and to enhance the cooling effect of the oil, the bottom surface 400 is enlarged as shown in the enlarged bottom view of the bottom surface in FIG. 14, in which the same parts as in FIG. 400 may be finished in an uneven shape, and as shown in FIG. 15, which is a plan view of the mounting part in FIG.
If the concave and convex shapes are given directionality in this manner, the oil that is in the concave portions will be smoothly drained into the discharge hole Km.

〔Effect of the invention〕

As mentioned above, in this invention, a single plate is provided with a hole for inserting the valve guide into the plate, which is conveniently used as a valve spring seat, and is arranged in the curve between the valve seat and the valve spring. Therefore, a single grate has many valve spring seats, which makes the assembly of the cylinder head extremely easy. Since one plate fits into multiple valve guides at the same time, it cannot move independently.This prevents the valve spring seat from rotating and prevents the valve seat and the sliding seat from rotating. Needle insertion can be improved.

Further, as in the embodiment, the increase in rad loss in the cylinder can be prevented by the oil, and it can also be used as a guide plate for the discharged oil.

[Brief explanation of the drawing]

FIG. 4 and 5 are respectively a top view and a bottom view of a cylinder head using one rubber soling sheet of the present invention, and FIG. 6 is a partially cutaway front view of FIG. Figure 7 is a top view and bottom view of the cylinder head cover R-, Figure 11 is a cross section (2) of the cylinder head with the cylinder head bracket installed, and Figure 12 is the
DD sectional view of Figure I, Figure 13 is an enlarged partially sectional perspective view of the bolt for tightening the cylinder head, Figure 14 is a sectional view of the main part of the cylinder head showing another example of the recessed part, and Figure 15 is a sectional view of the main part of the cylinder head. 1st
FIG. 4 is a top view of the main parts of FIG. 4; 10...Cylinder head, 50.52...Non-lube spring seat, 250...Non-lube spring seat, 252
...hole.

Claims (1)

[Claims] A plurality of holes are formed in the plate with a pitch corresponding to the pitch of the valve guide arranged in the cylinder head, and this plate is arranged between the valve seat formed in the cylinder head and the valve spring. A valve spring seat for a 4-stroke engine featuring the following.