JPS6363405B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating device for a sliding bearing provided in a transmission of a multi-shaft driven automobile.

Conventionally, the output shaft housed in the transmission extension housing is connected to a ball bearing fitted inside the front of the extension housing and a rear bushing (rear sliding bearing) fitted inside the rear of the extension housing. rotatably supported,
Its front end is connected to the intermediate shaft of the transmission transfer section, and power from an engine (not shown) is transmitted thereto to operate the drive wheels. For the rear bushing mentioned above, the lubricating oil is pumped through a lubrication passage provided on the intermediate shaft and is blown into the extension housing from a lubrication port provided at the front end of the output shaft to lubricate the rear bushing. Ta. However, when the vehicle speed is low or the temperature is low, the amount of lubricant oil blown out decreases, resulting in a lack of lubricant oil and reducing the durability of the rear bushing.

The present invention solves the above problems and provides a lubricating port cover that supplies sufficient lubricating oil to the sliding bearing of the output shaft of the transmission extension and improves durability even at low vehicle speeds or low temperatures. purpose.

In order to achieve the above object, the present invention blows out lubricating oil, which has been pumped through a lubricating oil passage provided in an intermediate shaft of a transmission transfer section, from a lubricating port provided on the front outer periphery of an output shaft. Inside the extension housing that lubricates the sliding bearing of the output shaft, a substantially cylindrical shape is inserted over the outer circumference of the output shaft, including the lubrication port, and has a through hole at a position facing the lubrication port. A flange is provided on the outer periphery of the end on the intermediate shaft side of the main body and whose peripheral edge is press-fitted into the housing wall, and a flange is provided on the inner periphery of the opposite end of the main body and has a sliding bearing in its center. This bearing lubrication port cover is made up of a partition wall having a notch that slides on the outer periphery of an output shaft having a smaller diameter than the bearing surface, and forms an oil reservoir in the lower part of the housing together with the housing wall and the sliding bearing.

The notch in the partition wall of the bearing lubrication port cover is in sliding contact with the outer periphery of the output shaft, which has a smaller diameter than the bearing surface of the sliding bearing, so the oil level in the oil reservoir exceeds the bottom of the bearing surface of the sliding bearing. The accumulated lubricating oil sufficiently lubricates the sliding bearing.

The present invention will be described below based on drawings showing embodiments. FIG. 1 is a longitudinal sectional view of a transmission extension housing 1 according to the invention. 2
3 is an intermediate shaft that receives torque transmission from a transmission input shaft (not shown), and 4 is an output shaft. A clutch sleeve 5 connects the intermediate shaft 3 and the output shaft 4 and transmits the torque of the intermediate shaft 3 to the output shaft 4. A ball bearing 6 is fitted in the front interior of the extension housing 1, and a rear bushing 7 is fitted in the rear interior. Rotatably supported. intermediate shaft 3
A lubrication passage 8 is provided through the axial center of the shaft, and a plug 9 is attached to the rear end thereof. The lubricating oil pumped through the lubricating passage 8 is fed through the plug 9
It is blown out from the orifice 9a into the connecting hole 4a of the output shaft 4. A plurality of radial lubricating ports 10 are provided on the front side of the output shaft 4, and the lubricating oil supplied via the intermediate shaft 3 is blown out into the extension housing. A rear cover 11 is fitted close to the outer periphery of the lubricating port 10. As shown in FIG. 2, the details of the rear cover 11 are as follows: The main body 11a has a substantially cylindrical shape, and is fitted onto the output shaft 4 with a flange 11b at the front end and a partition wall 11c at the rear end. have. Flange 11
b is located forward of the lubricating port 10, and its peripheral edge is press-fitted into the housing wall 1a. Partition wall 11
C is located at a portion of the output shaft 4 that has a smaller diameter than the rear bush bearing surface, and a notch 11d that slides into contact with the outer periphery of the output shaft 4 is provided. A through hole 11e for introducing lubricating oil into the extension housing is provided on the upper surface of the main body 11a at a position facing the lubricating port 10 of the output shaft 4. The notch 11d is brought into sliding contact with the outer periphery of the output shaft 4, and the main body 11a is inserted therethrough.
When the flange 11b is press-fitted into the housing wall 1a, the lower part of the extension housing 1 is surrounded by the rear bushing 7, the rear cover 11, and the housing wall 1a, and the oil level is lower than the bearing of the rear bushing 7. An oil reservoir 12 is formed that extends beyond the lowest part 7a of the surface.

In the transmission extension section configured as described above, the lubrication passage 8 of the intermediate shaft 3 passes through the
Lubricant oil blown out from the orifice 9a of the plug 9 at the rear end is blown out into the extension housing 1 from the lubrication port 10 of the output shaft 4 rotating at high speed. Lubrication port 10 on the upper half of the output shaft 4
The through hole 11e of the rear cover 11 is located on the outer periphery of the rear cover 11, and the lubricating oil is freely blown out into the extension housing 1. The lubricating oil blown out in this way is stored in the lower oil reservoir 12,
Since the oil level is always above the lowest part 7a of the bearing surface of the rear bushing 7, it exhibits excellent lubrication function not only during normal driving but also at low vehicle speeds and at low temperatures.

FIG. 3 shows a second embodiment of the invention. This is the main body 11a instead of the conductive hole 11e of the first embodiment.
and a rear cover having a through hole 11f formed by cutting out the upper semicircular portion of the partition wall 11c. This conduction hole 11f allows the lubrication port 10 of the output shaft 4 to
The lubricating oil blown out from the extension housing is further spread over a wide area inside the extension housing.

Since this invention is a bearing lubricating port cover having the structure described above, the lubricating oil blown out from the lubricating port of the driven shaft element is prevented not only during normal driving but also at low vehicle speeds and at low temperatures. The lubrication of the sliding bearing of the driven shaft element is achieved by freely diffusing into the extension housing and storing enough lubricating oil in the oil sump below that the oil level exceeds the bottom of the bearing surface of the sliding bearing. This has the effect of improving its durability.

[Brief explanation of drawings]

1 is a longitudinal sectional view of a transmission extension housing equipped with a lubricating port cover according to the present invention, FIG. 2A is a flange side end view of a rear cover according to the present invention, and FIG. Figure 3A is a flange side end view of the rear cover of another embodiment, Figure 3B is a cross-sectional view taken along line A-A of Figure 3A.
FIG. 1... Extension housing, 3...
Intermediate shaft, 4... Output shaft, 7... Rear bushing,
10...Lubricating port, 11...Lubricating port cover, 12...
...Oil sump.

Claims (1)

[Scope of Claims] 1. A rotating shaft consisting of a driving shaft element 3 and a driven shaft element 4 of a vehicle transmission, a sliding bearing 7 supporting the outer end side of the driven shaft element 4, and a rotating shaft comprising a driving shaft element 3 and a driven shaft element 4; Axial element 3
An oil passage 8 is provided along the axis to introduce pressurized lubricating oil, and an oil passage 8 is provided at the joint between the drive shaft element 3 and the driven shaft element 4 to introduce pressurized lubricating oil into the oil passage 8. Inside the transmission extension housing 1 that includes a lubricating port 10 that blows out the lubricating port 10 , the lubricating port 10 is inserted over the outer peripheral portion of the driven shaft element 4 that includes the lubricating port 10 , and is electrically connected to a position facing the lubricating port 10 . A substantially cylindrical main body 11a with a hole 11e opened, a flange 11b provided on the outer periphery of the end of the main body 11a on the drive shaft element 3 side, and whose peripheral edge is press-fitted into the housing wall 1a; A bearing lubrication port cover 11 consisting of a partition wall 11c provided on the inner periphery of the opposite end and having a notch 11d in the center thereof that is in sliding contact with the outer periphery of the driven shaft element 4 having a smaller diameter than the bearing surface of the sliding bearing 7. The housing wall portion 1a and the sliding bearing 7
and a bearing lubricating port cover that forms an oil reservoir 12 in the lower part of the housing.