JPH042838B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a packing for attaching a tube.

(Prior Art) Conventionally, some automatic transmissions have an extension housing connected to the rear of the transmission cable, and in this case, the output shaft, vehicle speed sensor, governor valve, etc. are housed in the extension housing. It is becoming more and more common.

The output shaft within the extension housing is rotatably supported by support means such as bearings and bushes, and it is necessary to supply lubricating oil to the support means.

Therefore, a lubricating oil path is formed at the axis of the output shaft,
Lubricating oil is supplied to the support means through the lubricating oil passage. In this case, the lubricating oil diffused by centrifugal force from the lubricating oil passage formed at the axis of the output shaft collides with the inner wall of the extension housing, and the lubricating oil is caused to collide with the inner wall of the extension housing. The water is sent to the supporting means through the pipes and troughs.

However, the above output shaft is not only located far from the lubricating oil supply source, but also has a long output shaft, so when the rotational speed of the output shaft decreases, such as at low vehicle speeds, centrifugal force acts on the lubricating oil. As a result, it is difficult to supply sufficient lubricating oil to the support means. Further, when the vehicle leans forward, such as when traveling downhill, the lubricating oil in the lubricating oil passage moves forward, resulting in insufficient supply of lubricating oil.

Therefore, it is conceivable to supply lubricating oil directly from a lubricating oil passage provided in the transmission case through a tube or the like to a portion that requires lubrication, such as the support means for the output shaft.

(Problems to be Solved by the Invention) However, in the conventional automatic transmission lubrication system described above, lubricating oil may leak from the joint between the lubricating oil path provided in the transmission case and the tube, or the tube may be extended. A support member for positioning and supporting the housing is required, which increases the number of parts and the number of assembly steps.

The present invention solves the problems of the conventional automatic transmission lubrication system described above, and can prevent lubricant oil from leaking from the joint between the lubricant passage and the tube provided in the transmission case. Another object of the present invention is to provide a tube mounting gasket that can easily position and support the tube within an extension housing.

(Means for Solving the Problems) For this purpose, the tube attachment gasket of the present invention is attached to the tip of the tube, and when attached to the gasket attachment seat formed on one member together with the tube, other members The tube communicates with a flow path provided in the tube.

Therefore, the tube mounting gasket is made up of a metal tube and an elastic sealing member. The metal cylinder has a cylindrical portion having a diameter larger than the outer diameter of the tube and a side wall having a hole having a smaller diameter than the outer diameter of the tube. The elastic seal member includes an inner seal portion formed at least inwardly of the cylindrical portion and having a hole having a smaller diameter than the outer diameter of the tube, and an outer seal portion having a compression allowance on the other member side of the side wall. It consists of two parts.

(Operations and Effects of the Invention) According to the present invention, as described above, there is provided a metal tube comprising a cylindrical portion having a diameter larger than the outer diameter of the tube and a side wall having a hole having a diameter smaller than the outer diameter of the tube, and the cylindrical portion. an inner seal portion at least inwardly of the
It has an elastic seal member consisting of an outer seal portion having a compression allowance on the other member side of the side wall.

The tube is connected to the tube attachment gasket and sealed by being press-fitted into the inner seal portion until it touches the side wall of the metal cylinder. At this time, the tube is positioned in the axial direction with respect to the tube mounting gasket by the side wall of the metal cylinder, and in the radial direction with respect to the tube installation gasket by the inner seal portion.

In addition, when the tube mounting gasket is attached to the gasket mounting seat formed on one member and the one member is joined to the other member, the compression allowance of the tube installation gasket is compressed, so that the other member is compressed. The seal between the flow path provided in the tube and the tube is ensured.

In this way, it is possible to reliably prevent lubricant oil from leaking from the joint between the tube and the flow path provided in other parts, and it is not necessary to install new parts to position and support the tube. This improves work efficiency.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a tube mounting gasket, 2
3 is a transmission case, 31 is a hydraulic control device fastened to the lower surface of the transmission case 3, and 4 is the above-mentioned hydraulic control device. an extension housing (hereinafter referred to as the "housing") connected to the transmission case 3;
5 is an output shaft provided within the housing 4.

This vehicular automatic transmission 2 includes a torque converter housing (not shown) containing a torque converter, an overdrive (OD) device, and an input shaft of the automatic transmission, an intermediate shaft 32 connected to the input shaft, and a planetary gear transmission. A transmission case 3 houses a transmission 33 with three forward speeds and one reverse speed, which is equipped with a mechanism, a clutch, and a brake, and a valve that is fastened to the lower surface of the transmission case 3 and has these various functions. , a shift valve that switches oil passages in response to a shift signal, a throttle valve that issues a shift signal, an oil pump that is a source of oil pressure, a hydraulic control device 31 that has a valve body 34, and an oil pan 35 that incorporates the hydraulic control device 31. , an output shaft 5 connected to the rear end of the transmission case 3 by a bolt (not shown) and connected to the intermediate shaft 32; and an electronic vehicle speed sensor 51 attached to the output shaft 5 and turned on and off by a reed switch (not shown). , a housing 4 that is attached to the output shaft 5 and has a built-in governor valve 52 that generates a governor pressure corresponding to the rotational speed of the output shaft 5, that is, the vehicle speed; A sleeve yoke 42 supported by the bearing portion 6 of the housing 4 and, in this embodiment, the housing 4
The extension housing bearing lubrication device 7 supplies a stable amount of lubricating oil to the bearing portion 6 of the present invention and incorporates the tube mounting gasket 1 of the present invention.

The bearing portion 6 of the housing 4 is provided in the shape of a gutter, which projects toward the transmission case 3 (leftward in the drawing), forms an oil sump 61, and has an annular plate-shaped oil sump weir 62 fixed to the tip 63a. An oil seal 67 is installed on the inner peripheral side 66 of the protruding part 63 and the protruding part 65 that protrudes rightward in the figure to prevent foreign matter from entering the output shaft 5 from outside and to prevent lubricating oil from leaking.
A dust cover 69 is attached to the oil seal 67 to prevent foreign matter from entering from the outside. Further, the bearing portion 6 is formed with an oil passage hole 60A, and the bearing 41 is formed with an oil hole 41A.

The housing bearing lubricating device 7 is provided in the transmission case 3, and includes a line pressure oil passage 72 that supplies line pressure from the valve body 34 through an oil chamber 71 to a hydraulic servo (not shown) of the transmission 33; A bearing lubricating oil extraction oil passage 7 is formed by drilling or casting on the wall surface 3a of the transmission case 3 so as to branch between the valve body 34 of the line pressure oil passage 72 and the oil chamber 71.
3, installed in the bearing lubricating oil extraction oil passage 73,
One end 77a is connected to a flow rate control restrictor (orifice in this embodiment) 74 that controls the flow rate by throttling action, and to the bearing lubricating oil outlet passage 73 and the tube mounting gasket 1 that prevents lubricating oil from leaking. The oil passage hole 60 of the bearing portion 6 of the housing 4 is fitted.
A, an output shaft 5 connected to the oil hole 41A of the bearing 41 at the other end 77b, an electronic vehicle speed sensor 51 attached to the output shaft 5, a governor valve 52, and a gutter-like protrusion 63;
It consists of a tube 78 arranged in a curved manner, bypassing the oil sump weir 62 attached to the tube.

In this configuration, the hydraulic oil (lubricating oil) in the line pressure oil passage 72 enters the tube 78 through the bearing lubricating oil extraction oil passage 73 while the oil amount is controlled by the orifice 74 . Furthermore, the lubricating oil is tube 78.
is supplied to the jet bearing part 6 from the other end 77b of
The oil seal 67 and the bearing 4 are connected through the oil passage hole 60A.
1, and further oil seal 67 and bearing 41.
The lubricating oil that has lubricated the sleeve yoke 42 and the output shaft 5 is supplied to the oil reservoir 61. Furthermore, the lubricating oil diffused by the rotation of the output shaft 5 is supplied to a speedometer gear (not shown) or the like. As a result, the output shaft 5 rotates smoothly, suppressing loss of engine output for driving the output shaft 5, and reducing engine fuel consumption.

In this embodiment, a bearing lubricating oil extraction oil passage 73 is formed by drilling or casting in the middle of the line pressure oil passage 72.
However, the bearing lubricating oil extraction oil passage 73 may be formed in the valve body 43 by drilling or casting.

In addition, the orifice 74 is connected to the bearing lubricating oil extraction oil passage 73.
Although it is provided in the tube 78, it may be provided in the tube 78.

3 to 5 show a first embodiment of the tube mounting gasket of the present invention.

In this embodiment, the tube mounting gasket 1 is a transmission case 3 which is a first member in which a bearing lubricating oil extraction oil passage 73 is formed, and a second member which is joined to the transmission case 3. A gasket mounting seat 40 provided on the housing 4 for sealing a tube 78 provided in the housing 4 and communicating with the bearing lubricating oil outlet passage 73 and a joint 20 between the bearing lubricating oil outlet passage 73 and the tube 78. installed on.

The tube mounting gasket 1 is a rubber seal 1 consisting of a metal tube 11, an inner seal portion 12, and an outer seal portion 13 provided integrally with the inner seal portion 12.
4.

The metal tube 11 has one end 11a narrowed to a diameter smaller than the outer diameter 78a of the tube 78, and has a circular rubber pouring hole 111 for integrally forming an inner seal portion and an outer seal portion by pouring once when manufacturing a rubber seal. Four radial side walls 110
The side wall 110 is bent 90 degrees from the other end 11b in the direction of the tube 78 and extended.
and a cylindrical portion 113 that is larger by a predetermined dimension than the outer diameter of the cylindrical portion 113. Further, the cylindrical portion 113 has a function of imparting rigidity to the rubber seal 14.

The inner seal part 12 is an annular body having a hollow part 121 fixed to the inner diameter side 115 of the metal cylinder 11, and a part 123 of the inner peripheral wall 122 is connected to the tube 7.
The outer diameter 78a of the metal cylinder 11 is smaller than the outer diameter 78a of the metal cylinder 11, and has a compression allowance 124 when the tube 78 is inserted.
A positioning part 125 of the tube 78 having a smaller diameter than the outer diameter 78a of the tube 78 is formed from the inner circumferential side of one end 11a of the tube 78, and a holding groove 126 of the metal tube 11 when manufacturing the rubber seal 14 is formed in the rear part 127. .

The outer seal portion 13 is connected to the inner seal portion 12 by a fitting portion 131 fitted into the rubber pouring hole 111.
The metal cylinder 11 has an annular tapered outer diameter 132 and a tapered inner diameter 13, which are integrally molded with the metal cylinder 11 and provided on the outer peripheral side of the side wall 110 of the metal cylinder 11.
3. The inner diameter 133 and the bearing lubricating oil extraction oil passage 73
A compressed portion 134 is formed between the transmission case 3 and the joint surface 135 that comes into contact with the joint portion 20 of the transmission case 3.

FIG. 6 shows a second embodiment of the tube mounting gasket 1 of the present invention.

The tube mounting gasket 1 of this embodiment is used to seal the joint surface with the tube, and is used to seal the joint surface of the metal tube 11.
One end 11a of the side wall 110 of the tube 7 is projected from the inner seal part 12 to form an orifice part 117, and the right wall 118 of the orifice part 117 is connected to the tube 7.
The inner peripheral wall 122 of the inner seal portion 12 and the annular convex portions 126 at two locations
a, 126b, and the outer seal portion 13
The abutting surface with the mating joint surface has an inner diameter 133, and a compressed portion 136 is formed between the mating mating surface and the end surface 137. When this embodiment is used in the lubricating device 7, the bearing lubricating oil outlet passage 73 may be made into a tube that slightly protrudes from the transmission case 3 and fitted with an inner diameter 133, and the bearing lubricating oil outlet oil It is also possible to eliminate the orifice 74 in the passage 73 and adjust the amount of lubricating oil using the orifice portion 117 of the metal cylinder 11.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an automatic transmission for a vehicle incorporating the tube mounting gasket of the present invention, and Fig. 2 is a side view of an extension housing of an automatic transmission for a vehicle incorporating the tube mounting gasket of the present invention. 3 is a front cross-sectional view of the first embodiment of the tube-mounting gasket of the present invention, FIG. 4 is a right side view of the first embodiment of the tube-mounting gasket of the present invention, and FIG.
The figure is a right side view of the first embodiment of the tube attachment gasket of the present invention, and FIG. 6 is a front sectional view of the second embodiment of the tube attachment gasket of the present invention. In the figure, 1...tube mounting gasket, 2...
Automatic transmission for vehicle, 3... Transmission case, 4... Extension housing, 5...
... Output shaft, 6 ... Bearing section, 11 ... Metal tube, 12
...Inner seal part, 13...Outer seal part, 14
...Rubber seal, 20...Joint part, 40...Packskin mounting seat.

Claims (1)

[Scope of Claims] 1. A tube mounting fitting that is attached to the tip of the tube and communicates the tube with a flow path provided in another member when attached to a packing mounting seat formed on one member together with the tube. , a metal tube comprising a cylindrical portion having a diameter larger than the outer diameter of the tube and a side wall having a hole smaller in diameter than the outer diameter of the tube; A packing for attaching a tube, characterized in that it has an elastic sealing member consisting of an inner sealing part having a small diameter hole and an outer sealing part having a compression allowance on the other member side of the side wall. 2. The tube mounting gasket according to claim 1, wherein the hole provided in the side wall is an orifice. 3. The tube mounting gasket according to claim 1, wherein the tube portion has a plurality of holes through which the elastic sealing member is poured.