CN1185522A - Stopper sealing structure - Google Patents

Abstract

A stopper sealing structure is characterized in that a round hole is opened on a cylinder body or on the external wall of a cylinder lid, then a round stopper coated with liquid sealing material is inserted in said hole, on the whole periphery face of said stopper is procesed out a circular slot, then the slotted stopper is coated with the sealing material and pressed into the round hole.

Description

Stopper sealing structure

The present invention relates to the sealing configuration of plug used on engine cylinder, the cylinder head.

In the cylinder head and cylinder block of motor,, when casting, must adopt fuse in order to make the passage of water and oil.So just formed the circular hole that connects on the engine cylinder cap that casts out and the outer wall of cylinder block, be to use the plug of the cylindrical cap shape that is commonly referred to as the U-shaped plug in the prior art with these circular hole shutoff.

Be an example of stopper sealing structure of the prior art shown in Fig. 9,10.Manufacturedly on the cylinder head 2 of motor 1 and the outer wall 4 of cylinder block 3 gone out circular hole 5.The cross section is that the cylindrical cap shape plug 6 of U font is pressed in this circular hole 5, and makes the inboard of its bottom 6a towards outer wall 4.

Simultaneously, when being pressed on the full periphery face of plug 6 the full aqueous sealing material 7 that is coated with, after its sclerosis, can play the effect of Sealing, so as to obtaining reliable sealing.

But in the sealing configuration of prior art, because the diameter of plug 6 is a bit larger tham circular hole, so when in above-mentioned circular hole 5, squeezing into periphery and scribble the plug 6 of sealing material 7, because the sealing material 7 on the plug 6 is extruded to the cylinder head 2 and the inside of cylinder block 3 from circular hole 5 by plug 6, the sealing material 7 of residual several micron thickness only between the week and the periphery of plug 6 in circular hole 5, like this, might cause poor sealing.And when in circular hole 5, squeezing into plug 6, as the interior perimembranous scratch of plug 6 peripheral parts of sealing surface or circular hole 5 time, not having sealing material 7 in scratch part also is the cause of poor sealing, thus have in the seal construction of prior art be easy to occur to leak, the problem of leakage of oil and so on.

The present invention is directed to described these problems, its objective is that providing a kind of can prevent to leak with leakage of oil reliably and can improve the stopper sealing structure of sealability.

First scheme of the present invention is to be equipped with circular hole on the outer wall of engine cylinder or cylinder head etc., and to wherein embedding the cylindrical shape plug that scribbles sealing material, so that sealing circular hole, for this stopper sealing structure, full week of periphery upper edge at aforementioned plug is provided with a groove at least, makes in aforementioned plug and the aforementioned circular hole and maintains aforesaid sealing material between week.

Also have, alternative plan of the present invention is to be equipped with circular hole on the outer wall of engine cylinder or cylinder head, and to wherein embedding the cylindrical shape plug that scribbles sealing material, thereby sealing circular hole, for this stopper sealing structure, take that full week of all upper edges is provided with a groove at least in above-mentioned circular hole, keep above-mentioned sealing material thereby make aforementioned plug and be entrenched between the plug periphery in the circular hole.

Third party's case of the present invention is to make on the basis of above-mentioned alternative plan, is arranged in the circular hole the residing position of groove on week and is to remove to justify the contact segment axial length in plug periphery and the circular hole and be about 20% position apart from two ends.

For first and second scheme of the present invention, in the occasion of in circular hole, inserting plug, be coated on the aqueous sealing material on the plug periphery, can be retained in groove on the plug periphery and the circular hole between week or be retained in the circular hole between the groove and plug periphery on week, all maintain the sealing material of q.s at plug on full week.When sealing material curing, just form the annular seal device, make sealability be improved.

For third party's case of the present invention, can in plug periphery and circular hole, sealing material be kept all pressing indirectly in the most stable part of power, thereby obtain more stable sealing.

Fig. 1 is the sectional view for the enforcement stopper sealing structure of first embodiment of the invention.

Fig. 2 is the sectional view for the enforcement stopper sealing structure of second embodiment of the invention.

Fig. 3 is the front view for the enforcement stopper sealing structure of third embodiment of the invention.

Fig. 4 is the IV-IV direction sectional view of Fig. 3.

Fig. 5 is the front view for the enforcement stopper sealing structure of fourth embodiment of the invention.

Fig. 6 is the front view for the enforcement stopper sealing structure of fifth embodiment of the invention.

Fig. 7 is the sectional view for the enforcement stopper sealing structure of sixth embodiment of the invention.

Fig. 8 is the sectional view for the enforcement stopper sealing structure of seventh embodiment of the invention.

Fig. 9 is the motor simplified side view that provides for motor is made brief description.

Figure 10 is the sectional view of an example of the stopper sealing structure of prior art.

Below in conjunction with accompanying drawing embodiments of the invention are illustrated.Hereinafter identical part subscript is marked with identical label among Fig. 1～8 and Figure 10.

It shown in Fig. 1 the first embodiment of the present invention described in the claim 1.

As Fig. 1, in this example with prior art in the full girth in periphery upper edge of the cylindrical cap shape plug 6 that takes the shape of the letter U at section of same form be provided with the annular ditch groove 8 of two rolling formings.And make the maximum outside diameter of plug 6 bigger slightly than the internal diameter of circular hole 5.

With the circular hole 5 on the outer wall 4 of plug 6 embedding cylinder head or cylinder block the time, on the full periphery that comprises groove 8, all scribble liquid sealing material 7, plug 6 squeezed in the lateral circular hole 5 of outer wall 4 realize being press-fitted, make plug bottom 6a become the inner side surface of outer wall 4, thereby circular hole 5 is sealed.Liquid sealing material 7 can adopt for example liquid-state silicon gel etc.

In adopting the stopper sealing structure shown in Fig. 1, the aqueous sealing material 7 that peripheral part was coated with of motor 1, being squeezed in the process of inserting circular hole 5 has been full of groove 8, and by having formed the annular seal device after drying, the sclerosis.Be filled in the volume flow rate of the liquid sealing material 7 in the groove 8 be enough to make even the interior perimembranous of when plug 6 inserts its peripheral part or circular hole 5 produces scratch also can be buried, and make and after hardening process, keep sealing reliably.

Fig. 2 is at second example of the present invention described in the claim 1.This example has also increased such feature on the basis of first example, and when squeezing into plug 6 in the circular hole 5 that forms on outer wall 4, the bottom 6a central part that becomes outer wall 4 inner side surfaces resembles and is invaginated type the inboard of some plugs 6.

In this structure, when in circular hole 5, being pressed into plug 6,, its bottom 6a improved embedability owing to having elasticity, and compare on sealability with the structure shown in Fig. 1 and also improved further.

Shown in Fig. 3,4 is the third embodiment of the present invention described in the claim 1, and wherein the groove 8 of rolling finishing changes into the groove 9 that machining forms.The volume of groove 9 reduces but its quantity increases, so institute's stored liquid sealing material is more, therefore the quantity at the formed annular seal device in liquid sealing material sclerosis back has also increased, and the result has obtained good sealing.

Fig. 5 is the fourth embodiment of the present invention described in the claim 1: formed the groove 10 of looped network shape at the peripheral part of plug 6 with the machining mode, the surface of contact of the peripheral part of circular hole 5 and plug 6 is covered with by latticed seal arrangement.

Be the fifth embodiment of the present invention described in the claim 1 among Fig. 6: the peripheral part of plug 6 processes spiral helicine groove 11.

Adopt by of the present invention third and fourth, during stopper sealing structure in five examples, owing on the surface of contact of circular hole 5 and the periphery of plug 6, be covered with the high liquid sealing material of sealability comprehensively, after sclerosis, form seal arrangement, therefore, can obtain more good sealing property.

Fig. 7 one embodiment of the present of invention for being put down in writing in the claim 2, promptly as the 6th embodiment of whole invention: in circular hole 5 and scope that plug 6 peripheries contact, process annular groove 12, be full of liquid sealing material 7 in the groove 12, so plug itself only needs to use getting final product with the same shape of prior art shown in Figure 10.

Even in this example when in circular hole 5, being pressed into plug 6, also can be coated with full sealing material 7 at the full periphery of plug 6.These sealing materials 7 are filled in the raceway groove 12 when plug 6 is pressed into, and make after sclerosis and obtain to seal reliably between week and plug 6 peripheries in the circular hole 5.

Fig. 8 is one embodiment of the present of invention of being put down in writing in claim 3, promptly as the 7th example of whole invention.

In this example, when in circular hole 5, being pressed into plug 6, as with the length that begins to occur the contacting part between the fillet R X2 from the outer end X1 of plug 6 to its inner end during as B, and get start at from plug 6 outsides plug 6 outer point X1 inwardly to 0.2B as starting point X3, and get X2 that plug inner end fillet R begins to locate light to outer wall 4 thickness directions and near center one side to 0.2B length place as starting point X4, then groove 15 is arranged in the circular hole among the Y section between the Zhou Shangdian X3 and X4.

In this example, sealing occurs in the contact pressure steady component of plug 6 and circular hole 5, and sealability is further improved.

Again it, the above embodiments mode does not constitute limitation of the invention, certainly, under the prerequisite that does not break away from aim of the present invention, multiple version can also be arranged.

In stopper sealing structure of the present invention, each in the claim 1,2,3 can reach the effect that excellent sealing performance is arranged.

Claims (3)

1. stopper sealing structure, on the outer wall of engine cylinder or cylinder head etc., be equipped with circular port, and in this circular hole, embed the cylindrical shape plug scribble sealing material, thereby seal this circular hole, it is characterized in that, on above-mentioned plug periphery,, make the periphery of aforementioned plug and above-mentioned circular hole maintain above-mentioned sealing material between interior week at least along full a groove being set week.

2. stopper sealing structure, on the outer wall of engine cylinder or cylinder head, be equipped with circular port, and in this circular hole, embed the cylindrical shape plug scribble sealing material, thereby seal this circular hole, it is characterized in that, in above-mentioned circular hole on week, at least along full a groove being set week, the above-mentioned sealing material of maintenance between the plug periphery in the interior week that makes aforementioned circular hole and this circular hole of embedding.

3. plug seal arrangement according to claim 2 is characterized in that, is arranged on that the groove present position on week is to remove plug periphery and the position of the interior all contact segment axial lengths of circular hole apart from two ends about 20% in the circular hole.

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