JP3116818B2 - Seal structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing structure for sealing two members in a liquid-tight or air-tight manner with two types of seal layers having different characteristics.

[0002]

2. Description of the Related Art Generally, as a seal structure for sealing a liquid-tight or air-tight seal between two members, a seal structure in which a gasket made of synthetic rubber, metal, or paper is sandwiched between the two members for sealing. Has been adopted. However, when this type of seal structure is applied to, for example, a control valve unit of an automatic transmission of an automobile, a plurality of gaskets are required, and assemblability of the unit is reduced. In addition, it is necessary to form a large number of through holes in the gasket corresponding to the oil passage, etc., and the manufacturing cost of the gasket increases,
There was a problem that it was not easy to respond to a design change or the like.

[0003] Therefore, by printing a synthetic rubber material or the like on one mating surface of two members and integrally forming a seal portion with one member, a seal structure that is inexpensive and excellent in assemblability can be obtained. Proposed. However, also in the sealing structure, as shown in FIG. 13, when a sealing portion 100 made of a soft material is formed in order to enhance the sealing property,
When the seal portion 100 is abnormally deformed by bolt fastening or the like, the edge portion 102 of the seal portion 100 peels off from the mating surface 101, and a seal portion made of a hard material is formed in order to prevent peeling of the edge portion 102. There is an irreconcilable problem that the sealing performance is reduced. Therefore, Japanese Patent Application Laid-Open
As described in JP-A-249786, a first seal portion having relatively incompressibility is formed by printing on one mating surface of two members, and elastic compressibility is provided in the vicinity of the first seal portion. There has been proposed a seal structure in which the second seal portion shown is printed in parallel with the first seal portion at a predetermined interval.

[0004]

In the seal structure described in the above publication, the first seal portion having relatively incompressibility functions as a stopper for securing a gap between the two members, and has elastic compressibility. Since the deformation of the second seal portion shown is suppressed, peeling due to abnormal deformation of the second seal portion can be prevented. However, since the first seal portion and the second seal portion are arranged in parallel at a predetermined interval, there is a problem that the width of the entire seal portion is increased. For this reason, there has been a problem that the method cannot be applied to an object having a narrow mating surface such as a control valve. Moreover, since the two members and the first and second seal portions usually have different purposes of use, they are often made of different materials. There is also the problem that constraints become large.

An object of the present invention is to provide a seal structure which is hardly peeled off, has excellent sealing properties, and can minimize the width of a seal portion.

[0006]

According to a first aspect of the present invention, there is provided a seal structure for a control valve unit of an automatic transmission.
A rate plate and a plate separated by a separate plate.
A seal structure for sealing between the lube bodies in an oil-tight manner , wherein a first seal layer is formed by printing on at least one of the mating surfaces of the separate plate and the valve body , and a material softer than the first seal layer. And at least a part of the first sealing layer is overlapped with the first sealing layer.
A second seal layer having a print height higher than the seal layer is formed by printing along the first seal layer, and the seal between the two seal layers seals the gap between the separate plate and the valve body. It is sealed.

Here, the second seal layer is formed so as to cover the entire outer surface of the first seal layer as described in claim 2, and the width of the first seal layer in the width direction is defined as in claim 3. 5. The JIS according to claim 4, wherein a groove is formed in the middle part, and a second seal layer is formed so as to fill the groove.
In the type A durometer hardness specified by K6253, the hardness of the first seal layer is set to 100 or more, and the hardness of the second seal layer is set to less than 100, as in claim 5, a sealing portion formed on one mating surface of the separation plate and the valve body, the other to a sealing groove for close contact fitted to correspond to the seal portion formed by the seal portion,, etc. are preferred examples.

[0008]

In the seal structure according to the present invention, the automatic transmission
Plate of the control valve unit of the machine
A seal portion including a first seal layer and a second seal layer is formed on at least one of the mating surfaces of the valve body and the valve body. By combining the separate plate and the valve body , the mating surface of the two members via the seal portion is formed. Will be sealed.

Further, the second sealing layer is composed of a softer material than the first seal layer, and since the seal height is set higher than the first seal layer, separate pre
In a state that combines over preparative and the valve body, separate plate and bar with the second seal layer adheres to the other Align surface
With seals between Rububodi, first sealing layer functions as a stopper, the separate plates and Barububo
So that the gap for preventing abnormal deformation of the second seal layer between Di is formed. Moreover, even if the edge of the second seal layer is disposed near the top of the first seal layer,
Due to the deformation of the seal layer, abnormal deformation at the edge of the second seal layer is prevented.

Further, since at least a part of the two seal layers is overlapped, the second seal layer which substantially functions as a seal is provided.
The width of the entire seal portion can be reduced while ensuring a sufficient seal width of the seal layer, and the seal portion can be easily formed even on a narrow portion of the mating surface. Moreover,
So it is formed a by Ri seal layer in print, Barububo
Seal layer corresponding to the complicated pattern of the mating surface
It is possible to easily form. In addition, since the overlapping portions of the two seal layers are bonded by the same material, the bonding strength of the two seal layers is increased.

When the second sealing layer is formed so as to cover the entire outer surface of the first sealing layer, the bonding strength of the second sealing layer to the first sealing layer is increased as much as possible.
Separation of the second seal layer can be prevented, and the width of the seal portion can be made as small as possible while sufficiently securing the width of the second seal layer. When a groove is formed in the middle of the first seal layer in the width direction and the second seal layer is formed so as to fill the groove, the portion of the second seal layer filled in the groove is formed. Due to the anchor effect, the second
The mounting strength of the seal layer is increased.

According to a fifth aspect of the present invention, there is provided a separate play.
When a seal is formed on one of the mating surfaces of the valve body and the valve body, and a seal groove is formed on the other corresponding to the seal part so as to fit to the seal part, a gap corresponding to the depth of the seal groove is formed. Since it is formed in the vicinity, abnormal deformation of the seal portion is reliably prevented.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a seal structure of a control valve unit of an automatic transmission of an automobile. As shown in FIG.
The control valve unit 1 is divided into four valve bodies 2 to 5, a front valve body 2, a pre-main valve body 3, a main valve body 4, and a rear valve body 5. Separate plates 6, 7, 8 are mounted between the valve body and the valve bodies 4, 5, respectively.

A groove 12 for mounting an oil groove 10 or a check ball 11 (see FIG. 2) is formed in a predetermined pattern on one side surface of the valve bodies 2 and 5 and on both side surfaces of the valve bodies 3 and 4. Oil pressure circuits are formed between the separate plates 6 to 8 and the valve bodies 2 to 5 by mounting the separate plates 6 to 8 in an oil-tight manner on the mating surfaces 2 to 5, respectively. ~ 8
A plurality of oil holes 13 communicating with the oil grooves 10 of the adjacent valve bodies 2 to 5 are formed in a predetermined arrangement. Since the hydraulic circuit itself of the control valve unit 1 is not directly related to the present invention, a detailed description thereof will be omitted. In FIG. 1, a seal portion 21 described later is omitted.

Next, a seal structure for sealing the space between the valve bodies 2 to 5 and the separate plates 6 to 8 in an oil-tight manner will be described with reference to the drawings. However, since the seal structure between the separate plates 6 to 8 and the valve bodies 2 to 5 is basically the same, the seal structure between the front valve body 2 and the pre-main valve body 3 and the separate plate 6 will be described.

The separate plate 6 is a flat substrate 20.
And seal portions 21 formed on both side surfaces thereof. As shown in FIG. 5 and FIG. 7, the side edge of the seal portion 21 has the oil groove 10 or the groove portion 1 in a state where the separate plate 6 is assembled between the valve bodies 2 and 3.
It is formed inside a portion corresponding to the mating surfaces 2a, 3a (shown by phantom lines) of the valve bodies 2, 3 so as not to be exposed to the second side. However, the width of the seal portion 21 can be set arbitrarily. For example, the width may be reduced toward the bolted portion, or may be reduced as a whole.

The seal portion 21 has a first seal layer 22 formed directly on the separate plate 6 by printing, and at least a part thereof is superimposed on the first seal layer 22 and printed along the first seal layer 22. Second seal layer 2 formed by
And 3. The second seal layer 23 is made of a material that is softer than the first seal layer 22.
In the type A durometer hardness specified by K6253, the hardness of the first seal layer 22 is 100 or more,
The hardness of the seal layer 23 is set to less than 100. More practically, for the first seal layer 22, type D
The durometer hardness is preferably set to 10 to 50, and the second seal layer 23 is preferably set to 20 to 50 in the type A durometer hardness. If the hardness of the second seal layer 23 is set to less than 20, the second seal layer 23 spreads outward and is exposed to the oil groove 10 when the valve bodies 2 to 5 are assembled. If the side edge of the seal layer 23 is deformed more easily, it will be easier to peel off. If it is larger than 50, the sealing properties will be reduced. Prior to assembly between the valve bodies 2 and 3, the print height H2 of the second seal layer 23 is set higher than the print height H1 of the first seal layer 22, as shown in FIG. For example, H2 is 0.15 to 0.18 mm and H1 is 0.1 mm.
It is preferable to set it to 02 to 0.05 mm.

As the substrate 20, a plate member made of a metal material such as stainless steel or an aluminum alloy or a non-metal material such as a synthetic resin material can be used. From the viewpoint of use, it is preferable to use a steel plate that has sufficient strength and rigidity and can be manufactured at low cost. After the substrate 20 has been subjected to a degreasing treatment, the sealing layers 22 and 23 are formed on the surface by printing. However, in order to improve the adhesion of the sealing layers 22 and 23 to the substrate 20, the degreasing treatment is performed. Prior to this, the substrate 20 may be subjected to a blast treatment, a chemical treatment, or the like to form irregularities on its surface. In addition, the sealing layers 22 and 23
Sealing layer 2 to improve the adhesion of
Before printing 2, 23, a primer may be applied to both sides of the substrate 20.

Printing techniques for forming the seal layers 22 and 23 include printing techniques such as letterpress printing, planographic printing, intaglio printing, screen printing, flocking printing, magnetic printing, and hot stamping, and material coating techniques using a dispenser. It is possible to adopt. Also, the sealing layer 2
Fluoro rubber, NBR rubber, S
Synthetic rubber materials such as BR rubber and silicon rubber, epoxy resin, silicone resin, phenol resin, urethane resin, polyimide resin, vinyl chloride resin, acrylic resin, polyurethane resin, ABS resin, PT
Synthetic resin materials such as FE (tetrafluoroethylene) resin, UV-curable synthetic resin materials, and metal powders such as aluminum alloy, copper, brass, stainless steel, glass powder, A composite material in which glass fiber, ceramic powder, ceramic fiber, molybdenum disulfide powder, or the like is mixed can be used.

Next, the operation of the seal structure will be described. Sealing layers 22 and 23 are formed on the separate plates 7 and 8 similarly to the separate plate 6, and the control valve unit 1 includes four valve bodies 2.
In the state where the separate plates 6 to 8 are respectively mounted between 〜 and ５, these are fastened with bolts (not shown) and assembled. As described above, since the seal layers 22 and 23 are integrally formed on the separate plates 6 to 8, the assembly work of the control valve unit 1 is greatly simplified. Since the seal layers 22 and 23 are formed by printing, a complicated pattern can be easily formed.
For this reason, it is possible to set so that the seal layers 22 and 23 are not exposed in the oil grooves 10 and the groove portions 12, and to minimize the contact area between the seal layers 22 and 23 and the hydraulic oil to minimize the seal layers 22 and 23. Can be prevented from deteriorating.

Further, by providing the second seal layer 23 so as to overlap the first seal layer 22, the seal width of the second seal layer 23, which greatly contributes to the sealing performance, is reduced while the width of the seal portion 21 is reduced as much as possible. Can be secured sufficiently. That is, it is possible to easily form the seal portion 21 even on a narrow portion of the mating surface while ensuring sufficient sealing performance. Moreover, since the hard first seal layer 22 functions as a stopper for securing a distance between the mating surfaces of the valve bodies 2 to 5 and the separate plates 6 to 8, peeling off due to abnormal deformation of the second seal layer 23 and the like are prevented. It will surely be prevented. Further, since the first seal layer 22 and the second seal layer 23 can be made of the same kind of material, it is possible to easily increase the bonding strength between them. Further, the seal layers 22 and 23 having different patterns can be formed on the surface of the substrate 20 by a simple operation of exchanging the printing master, and it is possible to easily cope with a design change of the control valve unit 1 and the like. .

Next, another embodiment in which the structures of the seal portion 21 and the seal structure are partially changed will be described. (1) Both seal layers 22A and 23A may be printed such that the entire outer surface of first seal layer 22A is covered with second seal layer 23A as in seal portion 21A shown in FIG.
In this case, the bonding area of the second seal layer 23A to the first seal layer 22A is increased as much as possible, and the bonding strength between the two can be greatly improved. Further, it is possible to improve the sealing performance by setting the width of the first seal layer as large as possible and to reduce the width of the seal portion 21A as much as possible to easily form the seal portion 23A even in a narrow region. Become.

(2) Like the seal portion 21B shown in FIG. 9, a groove portion 25 extending substantially over the entire length is formed at an intermediate portion in the width direction of the first seal layer 22B so as to fill the groove portion 25. The second seal layer 23B may be formed. In this case, the portion of the second seal layer 23B filled in the groove 25 functions as an anchor, so that the first seal layer 22B
The attachment strength of the second seal layer 23B to B can be greatly improved. (3) Two first sealing layers 22C are arranged in parallel with a slight gap, as in a sealing portion 21C shown in FIG.
In a groove 26 formed between the two first seal layers 22C,
The second seal layer 23C may be provided in a filled state.

(4) As in the seal structure shown in FIG. 11, a groove 27 may be formed in the valve bodies 2 and 3, and the seal 21 may be formed so as to fit into the seal groove 27. In this case, since the seal portion 21 does not deform beyond the depth of the seal groove 27, abnormal deformation of the seal portion 21 can be reliably prevented. In addition, seal groove 2
Instead of 7, a seal groove 28 as shown in FIG. 12 may be formed. Also, instead of the seal portion 21, the seal portion 21
A to 21C may be formed.

The seal portions 21, 21A to 21C have a two-layer structure including the first seal layers 22, 22A to 22C and the second seal layers 23, 23A to 23C. It is also possible to make a structure. In the case of a multi-layer structure of two or more layers, it is preferable to set the material of each seal layer so as to be harder on the separate plates 6 to 8 side.

[0026]

According to the seal structure of the present invention, the control of the automatic transmission can be performed without separately providing a gasket or the like.
Separate plate and valve body of the valve unit
It is possible to seal between the I, control Bal
Production unit cost
As well as improved assemblability,
It is possible to easily respond. In addition, the width of the entire seal portion is reduced while ensuring sufficient sealing performance, so that the seal portion can be easily formed even in a narrow portion of the mating surface. In addition, since both seal layers are formed by printing, it is possible to easily form even a seal portion having a complicated pattern. Further, since the first seal layer functions as a stopper for securing a distance between the mating surfaces of the two members, the first seal layer can cause the second seal layer to be abnormally deformed. Furthermore, since the first seal layer and the second seal layer are made of the same type of material, it is possible to easily increase the bonding strength between them.

According to the second aspect, the bonding strength of the second seal layer to the first seal layer is increased as much as possible.
Separation of the second seal layer can be more effectively prevented. Also,
The entire width of the seal portion can be made as narrow as possible while sufficiently securing the seal width of the second seal layer that greatly contributes to the sealing performance. According to the structure described in claim 3, the portion of the second seal layer provided so as to fill the groove of the first seal layer acts as an anchor, so that the mounting strength of the second seal layer against a load in the lateral direction is significantly increased. And improve.

According to the fifth aspect of the present invention, since the maximum deformation amount of the seal portion is determined by the depth and width of the seal groove, abnormal deformation of the seal portion can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a control valve unit.

FIG. 2 is a cross-sectional view of a main part of the control valve unit.

FIG. 3 is a cross-sectional view of a main part of a separate plate.

FIG. 4 is an end view of a main part of a front valve body on a separate plate side.

FIG. 5 is an explanatory view of a seal formed on a surface of a separate plate on a front valve body side.

FIG. 6 is an end view of a main plate body main part on a separate plate side.

FIG. 7 is an explanatory view of a seal formed on a surface of the separate plate on the side of the pre-main valve body.

FIG. 8 is a cross-sectional view of a seal portion having another configuration.

FIG. 9 is a cross-sectional view of a seal portion having another configuration.

FIG. 10 is a cross-sectional view of a seal portion having another configuration.

FIG. 11 is a cross-sectional view of a main part of a seal structure having another configuration.

FIG. 12 is a cross-sectional view of a main part of a seal structure having another configuration.

FIG. 13 is a cross-sectional view of a main part of a seal structure according to a conventional technique.

[Explanation of symbols]

Reference Signs List 1 control valve unit 2 front valve body 2a mating surface 3 pre-main valve body 3a mating surface 4 main valve body 5 rear valve body 6 separate plate 7 separate plate 8 separate plate 10 oil groove 11 check ball 12 groove 13 oil hole 20 substrate 21 seal Part 22 first seal layer 23 second
Seal layer 21A Seal part 22A First
Seal layer 23A Second seal layer 21B Seal part 22B First
Seal layer 23B Second seal layer 25 Groove 21C Seal 22C First
Seal layer 23C Second seal layer 26 Groove 27 Seal groove 28 Seal groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-180342 (JP, A) JP-A-5-147113 (JP, A) JP-A-60-129469 (JP, A) 87851 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16J 15/10 F16H 63/02

Claims (5)

(57) [Claims] A control valve unit for an automatic transmission.
Separated by separate plate and separate plate
A seal structure for sealing between the valve bodies to be oil-tight , wherein a first seal layer is formed by printing on at least one of the mating surfaces of the separate plate and the valve body and is softer than the first seal layer. A second seal layer having a printing height higher than that of the first seal layer, the second seal layer being formed by printing along the first seal layer. Oil between the separate plate and the valve body with the seal part consisting of layers
Densely sealed structure. 2. The seal structure according to claim 1, wherein the second seal layer is formed so as to cover the entire outer surface of the first seal layer. 3. The seal structure according to claim 1, wherein a groove is formed in the middle of the first seal layer in the width direction, and the second seal layer is formed so as to fill the groove. 4. The method according to claim 1, wherein the hardness of the first seal layer is set to 100 or more and the hardness of the second seal layer is set to less than 100 in the type A durometer hardness specified in JIS K6253. 4. The seal structure according to claim 3. 5. A seal according to claim 1, wherein a seal portion is formed on one of the mating surfaces of the separate plate and the valve body , and a seal groove is formed on the other surface so as to correspond to the seal portion. The seal structure according to claim 1.