JPH0654963U - Casing oil passage structure - Google Patents

Abstract

(57) [Summary] [Purpose] O-ring seal due to liquid gasket attachment
To prevent the deterioration of quality. [Configuration] First casing 1 and second casing 2
Are coated with liquid gasket 8 on their joint surface 3.
Join in the state. Formed on both casings 1 and 2, respectively
A pair of O-ring holding grooves 6 are provided in the oil passages 4 and 5.₁, 6₁Niso
The oil pipes 6 fitted with the O-rings 7 and 7 are fitted to each other. oil
At the center of the pipe 6, a liquid gasket reservoir groove 6 ₂Is formed
And the liquid that was squeezed out when the casings 1 and 2 were joined.
The gasket 8 is the liquid gasket reservoir groove 6₂Captured in
As a result, the O-ring holding groove 6₁, 6₁To
Inflow is blocked. This allows the liquid gasket 8 to be attached.
The deterioration of the sealing property of the O-rings 7 and 7 due to wearing is reliably prevented.
Be done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil passage structure of a casing in a transmission case, a differential case, etc., and particularly to a first casing and a second casing which are joined together by applying a liquid gasket to a joint surface. The present invention relates to an oil passage structure of a casing in which two oil passages are formed, and both ends of an oil pipe that transfers oil between the first oil passage and the second oil passage are fitted to a connecting portion of the first oil passage and the second oil passage.

[0002]

[Prior art]

 FIG. 3 shows an oil passage structure of a conventional casing. A first oil passage 4 connected to a first casing 1 and a second casing 2 which are joined to each other at a joint surface 3 thereof. And the second oil passage 5 is drilled. The connecting portion of the first oil passage 4 and the second oil passage 5 has a larger diameter portion 4 so that the diameter thereof is larger than that of the other portions.₁, 5 ₁ Is formed, and the expanded portion 4 thereof is formed.₁, 5₁Both ends of an oil pipe 6 for transferring oil between the oil passages 4 and 5 are fitted to each other.

In order to prevent oil from leaking outside from the oil passages 4 and 5 through the outer circumference of the oil pipe 6 and the joint surface 3 of the casings 1 and 2, one casing facing the outer circumference of the oil pipe 6, for example, For example, the O-ring 7 is fitted and held in the O-ring holding groove 1 ₁ formed in the first casing 1. A liquid gasket 8 is applied to the joint surface 3 of the casings 1 and 2 in order to prevent oil leakage from the inside of the casings 1 and 2.

[0004]

[Problems to be solved by the device]

By the way, in the casing oil passage structure shown in FIG. 3, when the first casing 1 and the second casing 2 are joined together with the liquid gasket 8 applied to their joint surfaces 3, the extruded liquid gasket 8 Flows into the O-ring holding groove 1 ₁ and is solidified, so that there is a problem that the sealing property is deteriorated due to deterioration of the adhesion between the O-ring 7 and the O-ring holding groove 1 ₁ and a change in the filling rate of the O-ring 7. .

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an oil passage structure of a casing that eliminates the above-mentioned inconvenience due to a liquid gasket and is excellent in sealing performance.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention applies a liquid gasket to the joint surfaces to form a first oil passage and a second oil passage in a first casing and a second casing which are mutually joined. In the oil passage structure of the casing that is formed by fitting both ends of the oil pipe that transfers oil between the oil passages to the connection portion of the first oil passage and the second oil passage, The first casing and the second casing are sealed by a seal member held in a seal member holding groove, and the seal member is provided on the outer circumference of the oil pipe facing the joint surface of the first casing and the second casing. The first feature is that the liquid gasket reservoir groove is formed apart from the holding groove.

Further, according to the present invention, a liquid surface gasket is applied to the joint surfaces to form a first oil passage and a second oil passage in the first casing and the second casing, which are joined to each other. In an oil passage structure of a casing in which both ends of an oil pipe that exchanges oil between the oil passages are fitted to the connection portion of the first oil passage and the second oil passage, the outer periphery of both ends of the oil pipe and the first casing and the second casing The second casing is sealed by the seal member held in the seal member holding groove, and the joint surface of the first casing and the second casing facing the outer circumference of the oil pipe is separated from the seal member holding groove. The second feature is that a liquid gasket reservoir groove is formed by using the

[0008]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the expanded diameter portion 4 _{1 of} the first oil passage 4 formed in the first casing 1 and the expanded diameter portion of the second oil passage 5 formed in the second casing 2 5 ₁ oil pipe 6 is fitted at both ends to the liquid gasket positioned between a pair of O-rings spaced axially retaining groove 6 _1, 6 _1, both O-ring holding groove _61, 6 between ₁ It has a reservoir groove 6 ₂ . The pair of O-rings 7 and 7 held in the O-ring holding grooves 6 ₁ and 6 ₁ respectively prevent the oil from leaking from the oil passages 4 and 5 so as to prevent the oil from leaking. ₁ and elastically abuts on the enlarged diameter portion 5 ₁ of the second oil passage 5. Further, the liquid gasket reservoir groove 6 ₂ is formed at a position separated from the both O-ring holding grooves 6 ₁ , 6 ₁ by a predetermined distance and facing the joint surface 3 of the first casing 1 and the second casing 2. To be done.

Then, the liquid gasket 8 is applied to the joint surface 3, and the O-ring holding groove 6 is previously formed.₁, 6 ₁ When the first casing 1 and the second casing 2 are joined with the oil pipe 6 having the O-rings 7, 7 fitted in between, the extruded liquid gasket 8 causes the liquid gasket 8 formed in the oil pipe 6 from the joining surface 3 Groove 6₂Flow into and are captured. As a result, the liquid gasket 8 becomes the O-ring holding groove 6₁, 6₁Of the O-rings 7, 7 due to adhesion of the liquid gasket 8 is prevented. Further, the oil pipe 6 has a liquid gasket reservoir groove 6₂As a result, the area of the joint surface 3 between the casings 1 and 2 does not decrease, and the liquid gasket 8 ensures the sealing performance.

FIG. 2 shows a second embodiment of the present invention.

A second embodiment, instead of forming a liquid gasket reservoir groove to Aburakan 6, is formed on the bonding surface 3 of the casings 1, 2 facing the grooves 1 ₂ reservoir the liquid-like gasket in Aburakan 6 . In the present embodiment, the liquid gasket reservoir groove 1 ₂ is formed on the first casing 1 side, but it can be formed on the second casing 2 side or across both casings 1 and 2. . Also in this second embodiment, since the liquid gasket 8 extruded at the time of joining the casings 1 and ₂ is captured in the liquid gasket reservoir groove 12, the sealability of the O-rings 7 and 7 due to the adhesion of the liquid gasket 8 is reduced. The bottom is prevented.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various design changes can be made.

For example, in the embodiment, the O-ring holding groove 6₁, 6₁Is formed on the outer circumference of the oil pipe 6, and its O-ring holding groove is located on the outer circumference of the oil pipe 6 and the enlarged diameter portion 4₁, 5 ₁ Can be formed on the inner circumference.

[0015]

[Effect of device]

 As described above, according to the first or second aspect of the present invention, the outer circumference of both ends of the oil pipe and the space between both casings are sealed by the seal member held in the seal member holding groove, and the sealing surface is opposed to the joint surface of both casings. Since the liquid gasket retaining groove is formed on the outer periphery of the oil pipe or on the joint surface of both casings facing the outer periphery of the oil pipe so as to be separated from the seal member holding groove, the protruding liquid gasket is captured by the liquid gasket retaining groove. It is possible to prevent intrusion into the seal member holding groove, which reliably prevents deterioration of the sealability of the seal member due to the liquid gasket. In particular, according to the first feature of the present invention, the area of the joint surface of the first casing and the second casing is not reduced by the liquid gasket retaining groove, so that the sealing property is more reliably maintained.

[Brief description of drawings]

FIG. 1 is a diagram showing an oil passage structure of a casing according to a first embodiment.

FIG. 2 is a diagram showing an oil passage structure of a casing according to a second embodiment.

FIG. 3 is a view showing an oil passage structure of a conventional casing.

[Explanation of symbols]

1 1st casing 1 ₂ Liquid gasket reservoir groove 2 2nd casing 3 Joining surface 4 1st oil passage 5 2nd oil passage 6 Oil pipe 6 ₁ O-ring holding groove (seal member holding groove) 6 ₂ Liquid gasket housing Groove 7 O-ring (seal member) 8 Liquid gasket

Claims (2)

[Scope of utility model registration request] 1. A first oil passage (4) and a first casing (1) and a second casing (2) which are joined to each other by applying a liquid gasket (8) to the joining surface (3). Oil pipes that respectively form second oil passages (5) and transfer oil to and from the oil passages (4, 5) at the connecting portions of the first oil passages (4) and the second oil passages (5). In a casing oil passage structure in which both ends of (6) are fitted, a seal member holding groove (6) is provided between the outer periphery of both ends of the oil pipe (6) and the first casing (1) and the second casing (2).
₁ ), the outer periphery of the oil pipe (6) facing the joint surface (3) of the first casing (1) and the second casing (2) while being sealed by the seal member (7)
An oil passage structure for a casing, characterized in that a liquid gasket reservoir groove (6 ₂ ) is formed apart from the seal member holding groove (6 ₁ ). 2. A first casing (1) and a second casing (2) which are joined to each other by applying a liquid gasket (8) to the joining surface (3) and a first oil passage (4) and Oil pipes that respectively form second oil passages (5) and transfer oil to and from the oil passages (4,5) at the connecting portions of the first oil passages (4) and the second oil passages (5). In a casing oil passage structure in which both ends of (6) are fitted, a seal member holding groove (6) is provided between the outer periphery of both ends of the oil pipe (6) and the first casing (1) and the second casing (2).
₍₁ ) is sealed by the seal member (7) held, and at the joint surface (3) of the first casing (1) and the second casing (2) facing the outer circumference of the oil pipe (6),
An oil passage structure for a casing, characterized in that a liquid gasket reservoir groove (1 ₂ ) is formed apart from the seal member holding groove (6 ₁ ).