JPH06313471A - Lubricating oil supplying device for automatic transmission - Google Patents

Abstract

PURPOSE:To supply proper lubricating oil by providing a mission output shaft having a plurality of lubricating holes penetrating to an outer circumferential surface and a transfer input shaft having oil seal which is spline-fit therewith, and arranging the lubricating holes exceeding a spline end point, and providing an oil reservoir. CONSTITUTION:The hollow hole 5 of a mission output shaft 1 is provided extending till a position which exceeds the spline 4 fit part of the mission output shaft 1 and a transfer input shaft 2, and lubricating holes 6 are provided on a position which exceed the end point of the spline 4 of the output shaft 1. Lubricating oil supplied in the hollow hole 5 is supplied to a prescribed member through each lubricating hole, and lubricating oil is filled from the lubricating hole 6 on a position which exceed the end point of the spline 4 into a hollow chamber 10, and it is returned-flow into an oil reservoir 8 through a missing tooth of the spline 4. An oil sealing 7 is lubricated by lubricating oil 13 stored in the oil reservoir 8. It is thus possible to supply lubricating oil 13 into a spline 4 and the oil sealing 7 without changing the allocation of a lubricating oil amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply device for an automatic transmission, and more particularly to a lubricating oil supply device for a spline and an oil seal of an input shaft of a four-wheel drive transfer fitted with an output shaft of the automatic transmission. Regarding

[0002]

2. Description of the Related Art Conventionally, as an oil passage for supplying lubricating oil to engaging members such as various gear trains of an automatic transmission, FIG.
As shown in FIG. 1, a hollow hole 5 is formed in the output shaft 1 of the automatic transmission, and a plurality of lubricating holes 6 are provided in the longitudinal direction of the output shaft 1 so as to penetrate from the hollow hole 5 to the outer peripheral surface of the output shaft 1. The lubricating oil is supplied to each member of the automatic transmission by centrifugal force as the output shaft 1 rotates.

In a four-wheel drive vehicle, an input shaft 2 of a transfer attached to the rear of the transmission is fitted with an output shaft 1 of the automatic transmission by a spline 4,
Power is distributed to the front and rear wheels.

To prevent oil leakage, an oil seal 7 made of a rubber member is fixed to the transmission case 3 so as to come into contact with the transfer input shaft 2. The oil seal 7 is biased by a spring member (not shown) and is in contact with the input shaft 2.

The oil seal 7 is fixed to the rotary shaft 2, and friction is generated when the shaft rotates, so that it is necessary to supply lubricating oil also to the oil seal 7 itself, and the mission output shaft 1, a lubricating hole 6 is provided at a position where lubricating oil is supplied to the oil seal 7, as shown in FIG.

[0006]

However, it has been found that friction occurs in the spline fitting portion of the transfer input shaft 2 which is rotatably supported by ball bearings when the shaft rotates in the transfer of a four-wheel drive vehicle.

In order to eliminate such wear due to friction, it is necessary to supply lubricating oil to the spline fitting portion. Therefore, as shown by the broken line in FIG. 1, when the hollow hole 5 of the mission output shaft 1 is extended and a lubricating hole 6 is additionally provided beyond the end point of the spline 4, the total number of lubricating holes is reduced. There was a problem that the amount of oil increased and the distribution of oil amount changed.

That is, the amount of oil in the lubricating hole 6 provided in the mission output shaft 1 is attenuated by a predetermined amount according to the distance from the supply source, but by adding a new lubricating hole, the amount of lubricating oil in the original lubricating hole is distributed. Changes. Then, in order to maintain the oil amount of the original lubrication hole to be the same as that before the addition of the lubrication hole, the oil amount distribution of the supply source must be increased.

Therefore, the present invention solves the above problems, provides a lubricating hole for supplying lubricating oil to the spline fitting portion of the shaft, eliminates the conventional lubricating hole for supplying lubricating oil to the oil seal, and An object of the present invention is to provide a lubricating oil supply device for an automatic transmission, which is configured to supply lubricating oil to the oil seal itself.

[0010]

In order to achieve the above-mentioned object, the present invention provides a plurality of axially hollow holes for supplying lubricating oil to members of an automatic transmission, and penetrates the outer peripheral surface from the hollow holes. A mission output shaft having a lubrication hole, a transfer input shaft that is spline-fitted to the mission output shaft, and an oil seal that abuts an outer peripheral surface of the transfer input shaft are provided, and a hollow hole is formed in the mission output shaft at a spline end point. (EN) Provided is a lubricating oil supply device for an automatic transmission, which extends over and has a lubrication hole disposed beyond a spline end point, and has an oil pool for oil seal lubrication.

At least one tooth is provided on the spline to form an oil passage to the oil sump.

[0012]

According to the present invention, with the above-described structure, the hollow hole extends beyond the spline end point, and instead of providing the lubrication hole for oil seal lubrication, the hollow hole has the lubrication hole beyond the spline end point, and the spline missing tooth is interposed. Oil is recirculated to the oil sump and reaches a lip of the oil seal. Can be supplied.

[0013]

FIG. 2 is a transverse sectional view of an output stage and a transfer of an automatic transmission showing an embodiment of a lubricating oil supply system of the present invention.

As shown in the figure, the transfer 30 is arranged at the rear stage of the automatic transmission 20, and the transfer input shaft 2 is fitted to the transmission output shaft 1 at the spline 4 to distribute the power to the front and rear wheels respectively. To do.

FIG. 3 is a partially enlarged view of a main portion of the lubricating oil supply system of FIG.

As shown in FIG. 3, lubricating holes 6 are provided at predetermined positions from the hollow hole 5 of the mission output shaft 1. In this embodiment, the hollow hole 5 is extended to a position beyond the fitting portion of the spline 4 between the transmission output shaft 1 and the transfer input shaft 2, and the output shaft 1
A lubricating hole 6 is provided at a position beyond the end point of the spline 4.

Hollow hole open end on the left of FIG. 3 (not shown)
The lubricating oil supplied from the above supplies lubricating oil to a predetermined member through each lubricating hole 6, and from the lubricating hole 6 arranged at a position beyond the end point of the spline 4 by a lid 11 (see FIG. 2). Lubricating oil is filled in the hollow chamber 10 which is formed in a bag shape.

Since the splines 4 are closely fitted to each other, according to the present invention, the splines 4 are provided with at least one tooth, and an oil passage is formed through the tooth.

Lubricating oil filled in the hollow chamber 10 is returned to the oil sump 8 through the toothless portion of the spline. Oil sump 8
The protrusion 12 has a height up to the lip portion 9 of the oil seal 7, and the accumulated lubricating oil 13 lubricates the oil seal 7.

[0020]

As described above, according to the present invention,
Lubrication holes provided on the mission output shaft by supplying lubricating oil to the spline fitting part of the transmission output shaft and the transfer input shaft and storing the lubricating oil for spline fitting in an oil reservoir to lubricate the oil seal. Has the advantage that the lubricating oil can be supplied without newly adding the number of oils, and thus without changing the oil amount distribution.

[Brief description of drawings]

FIG. 1 is a partially enlarged view showing the configuration of a conventional lubricating oil supply device for an automatic transmission.

FIG. 2 is a cross-sectional view showing the configuration of an automatic transmission including the lubricating oil supply device of the present invention.

FIG. 3 is a partially enlarged view of a lubricating oil supply device for an automatic transmission according to the present invention.

[Explanation of symbols]

 1 Mission Output Shaft 2 Transfer Input Shaft 3 Mission Case 4 Spline 5 Hollow Hole 6 Lubrication Hole 7 Oil Seal 8 Oil Sump 9 Lip 10 Hollow Chamber 11 Lid 12 Projection 13 Lubricating Oil

Claims (2)

[Claims] 1. A transmission output shaft having a plurality of lubricating holes which are provided with an axial hollow hole for supplying lubricating oil to a member of an automatic transmission and penetrate the outer peripheral surface from the hollow hole, and the transmission output shaft and spline. A transmission input shaft to be fitted and an oil seal that comes into contact with the outer peripheral surface of the transfer input shaft are provided, and a hollow hole is extended to the mission output shaft beyond the spline end point and a lubrication hole is passed beyond the spline end point. A lubricating oil supply device for an automatic transmission, which is provided and has an oil pool for lubricating an oil seal. 2. The lubricating oil supply system for an automatic transmission according to claim 1, wherein at least one toothless portion is provided on the spline to form an oil passage to the oil sump.