JP2671131B2 - Gearbox lubricator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a transmission, and in particular, lubricating oil splatter scattered by a transmission gear is collected by a lubricating oil supply trough to collect a power collecting shaft. The present invention relates to a lubricating device for a transmission, which supplies lubricating oil to the bearing oil seal part.

[Conventional technology]

The transmission includes a first case that houses most of the transmission,
A clutch housing that is formed by a second case that accommodates a part of the transmission that is mounted on one side of the first case and that accommodates a clutch is provided on the other side of the first case.

In the lubrication of the transmission, lubricating oil is scattered by a speed change gear, and the gear mesh portion and other parts are lubricated by the lubricating oil splash.

Further, as a lubricating device for a transmission, there is one disclosed in Japanese Patent Laid-Open No. 61-17768. The drive device of the four-wheel drive device for a vehicle disclosed in this publicly is connected to an oil passage inside the shaft by an oil guide that collects the oil scraped up by the rotation of the transfer gear to perform forced lubrication.

Further, there is one disclosed in Japanese Patent Publication No. 61-39547. The mounting structure of the oil garter disclosed in this publication is provided with an oil garter that supplies the lubricating oil scraped up by the gear train to an appropriate portion in the housing, thereby improving the mountability and reliability of the oil garter. .

Furthermore, there is one disclosed in Japanese Utility Model Publication No. 60-39564. In the transmission for an automobile disclosed in this publication, a sealing material is interposed between the joint pipes of the case cover and the retainer to improve the reliability of the sealing function.

Further, there is one disclosed in Japanese Utility Model Publication No. 62-46039. The device for confirming the oil supply pipe disclosed in this publication is provided with an oil supply pipe that receives the lubricating oil scraped up by the speed change gear and supplies it to the propeller shaft, and a rib that enters the breather chamber is provided in the oil supply pipe. Along with the formation, an inspection window is formed on a part of the upper surface of the breather chamber so that the assembled state of the oil supply pipe can be easily confirmed from the outside.

[Problems to be solved by the invention]

By the way, in the conventional transmission lubricating device,
As shown in the figure, the lubricating oil scraped up by the speed change gear is directly lubricated to the oil seal part 130 of the output shaft 120 through the hole 140, or the oil seal part of the output shaft is lubricated using the oil garter. I am guiding you.

However, the amount of lubricating oil scraped up by the speed change gear varies depending on the rotation state of the output shaft,
In the low speed range, the rotation of the output shaft is low, so the amount of lubricating oil does not reach the expected amount.On the contrary, in the high speed range, the rotation of the output shaft is high, so the amount of lubricating oil is larger than the expected amount. It will be.

For this reason, the supply amount of the lubricating oil is not stable, seizure may occur in the oil seal portion due to poor lubrication, and the reliability of the lubricating device is low.

[Object of the invention]

Therefore, an object of the present invention is to temporarily store lubricating oil in an oil reservoir defined by a weir in order to eliminate the above-mentioned inconvenience, and to supply the lubricating oil from a supply hole portion below the oil reservoir to an oil seal portion. It is possible to stabilize the supply amount of lubricating oil by supplying it and improve the reliability of the lubricating device, and also to collect the lubricating oil that overflows from the oil sump beyond the weir and recover it through the return hole. Another object of the present invention is to realize a lubricating device for a transmission, which can be returned to the pan to prevent the oil level in the oil pan from decreasing.

[Means for solving the problem]

In order to achieve this object, the present invention provides a lubricating device for a transmission in which a lubricating oil supply trough portion for collecting lubricating oil droplets by a speed change gear and guiding it to a predetermined portion is provided in parallel to the axial direction of the input / output shaft. At the upper part of the bearing oil seal part of the output shaft, an oil sump part partitioned by a weir for temporarily storing the lubricating oil guided by the lubricating oil supply trough part is provided, and at the lower part of the oil sump part, The oil seal part is provided with a supply hole part for supplying lubricating oil, and a return hole part for recovering the lubricating oil overflowing from the oil sump part beyond the weir and returning to the oil pan is provided. And

[Action]

With the above configuration, the lubricating oil is guided by the lubricating oil supply gutter to the oil sump above the bearing oil seal of the output shaft, and the lubricating oil is temporarily stored and overflows from the oil sump. The lubricating oil collected is returned to the oil pan by the return hole, and the lubricating oil is supplied to the oil seal part from the supply hole at the lower part of the oil sump to stabilize the amount of the lubricating oil supplied, thereby improving the reliability of the lubricating device. It improves the sex.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention. In FIG. 2, 2 is a vehicle, 4 is an internal combustion engine, 6 is a power transmission mechanism, 8 is a transmission connected to the internal combustion engine 4, and 10 is a select lever. That is, the power of the internal combustion engine 4 is transmitted to the drive wheels 18 via the transmission 8, the propulsion shaft 12, the differential gear 14, and the drive shaft 16.

The input shaft (not shown) and the output shaft 20 of the transmission 8 are arranged so as to have the same center, and a gear group (not shown) for transmission is provided between the input shaft and the output shaft 20, and An auxiliary shaft (not shown) is provided in parallel. Further, the output shaft 20 is the propulsion shaft.
12 has been contacted.

The transmission case 22 of the transmission 8 includes a first case 24 that accommodates most of the transmission 8, that is, a gear group for speed change, and a second case 26 that accommodates a part of the output shaft 20. The second case 26 is attached to one side of the first case 24, and the other side of the first case 24 is attached with a clutch housing (not shown) that accommodates a clutch (not shown).

In the first and second cases 24, 26, there is provided a lubricating oil supply trough portion 28 for collecting the lubricating oil droplets scraped up by the speed change gear group. This lubrication oil supply gutter 28
As shown in FIGS. 1 and 3, one end 28a is attached to the first case 2
It is formed in parallel with the axial direction of the input / output shaft and has a U-shaped cross-section so that the other end 28b is in communication with the second case 26 while being positioned inside the housing 4.

Then, a weir 32 is provided above the bearing oil seal portion 30 of the output shaft 20, an oil sump portion 34 is formed by the weir 32, and lubricating oil is supplied to the oil seal portion 30 below the oil sump portion 34. Therefore, the supply hole 36 is formed. At this time, the oil sump portion 34 is formed at a position where the lubricating oil can be guided and supplied from the other end 28b of the lubricating oil supply trough portion 28.

In addition, the second case 26 for returning the lubricating oil that has passed over the weir 32 of the oil sump 34, that is, overflowed from the oil sump 34 to the oil pan (not shown) of the transmission 8.
For example, two return hole portions 38 are provided on the inner wall 26a.

 Next, the operation will be described.

The input shaft is rotationally driven by a drive of an engine (not shown) via a crank shaft (not shown), and this rotational force is transmitted to the output shaft 20 by meshing of the speed change gear group. And
The rotational force transmitted to the output shaft 20 is transmitted to the differential machine via the propulsion shaft 12.
After being transmitted to 14, and finally decelerated, the drive wheels 18 are rotated via the drive shaft 16.

At this time, when the shifting gear group rotates, the first case 24
Lubricating oil stored in the lower part is scraped up, and lubricating oil splashes are scattered in the first case 24. Then, the lubricating oil splash is collected in the lubricating oil supply gutter 28.

In addition, the collected lubricating oil is not supplied to the lubricating oil supply gutter 28.
Is guided from the other end 28a into the oil reservoir 34.
Then, the lubricating oil is supplied to the oil seal portion 30 through the supply hole portion 36 formed in the oil sump portion 34.

In the high speed range of the internal combustion engine 4, when the collected lubricating oil is guided from the other end 28b of the lubricating oil supply gutter 28 to the oil sump 34, the guiding amount of the lubricating oil is large. Overflows over the weir 32 of the oil sump 34. At this time, the lubricating oil overflowed is the second case.
It flows down along the inner wall 26a of 26, is returned to the oil pan (not shown) of the transmission 8 through the return hole 38.

As a result, the lubricating oil is temporarily stored in the oil sump portion 34, and an expected amount of lubricating oil can be supplied from the oil sump portion 34 to the oil seal portion 30 even in the low speed range. Can be stabilized, the occurrence of seizure due to poor lubrication of the oil seal portion 30 can be reliably prevented, and the reliability of the lubricating device can be improved.

Further, the lubricating oil overflowing from the weir 32 of the oil reservoir 34 is returned to the oil pan (not shown) of the transmission 8 through the return hole 38, so that the oil level in the oil pan can be prevented from lowering, which is practical. It is advantageous.

〔The invention's effect〕

As described above in detail, according to the present invention, the oil sump portion defined by the weir is provided above the bearing oil seal portion of the output shaft to temporarily store the lubricating oil guided by the lubricating oil supply trough portion. At the same time, a supply hole is formed in the lower part of the oil sump to supply lubricating oil to the oil seal, and a return hole that collects the lubricating oil overflowing from the oil sump over the weir and returns it to the oil pan. Since the lubricating oil is temporarily stored in the oil sump, the lubricating oil can be supplied to the oil seal from the supply hole at the bottom of the oil sump to stabilize the amount of lubricating oil supplied. It is possible to reliably prevent seizure due to poor lubrication of the seal portion, and improve the reliability of the lubricating device. In addition, the lubricating oil overflowing from the oil reservoir is returned to the oil pan through the return hole, so that the oil level in the oil pan can be prevented from lowering, which is practically advantageous.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a cutaway sectional view of an essential part of an oil reservoir, FIG. 2 is a schematic explanatory view of a vehicle, and FIG. 3 is III-III of FIG. FIG. 4 is a schematic sectional view taken along a line, and FIG. 4 is a plan view of the oil sump. FIG. 5 is a schematic cross-sectional view showing the state of supply of lubricating oil to the output shaft, showing the prior art of the present invention. In the figure, 2 is a vehicle, 4 is an internal combustion engine, 6 is a power transmission mechanism, 8 is a transmission connected to the internal combustion engine 4, 10 is a select lever, 12 is a propulsion shaft, 14 is a differential gear, 16 is a drive shaft. , 18 is a drive wheel, 20 is an output shaft, 22 is a transmission case, 24 is a first case, 26 is a second case, 26a is an inner wall, 28
Is a lubricating oil supply trough, 28a is one end, 28b is the other end, 30 is an oil seal, 32 is a weir, 34 is an oil reservoir, 36 is a supply hole, and 38 is a return hole 38.

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A lubricating device for a transmission, comprising: a lubricating oil supply trough portion which collects lubricating oil droplets from a speed changing gear and guides the lubricating oil droplets to a predetermined portion in parallel with the axial direction of the input / output shaft. An oil sump section, which is defined by a weir, is provided on the upper part of the bearing oil seal section to temporarily store the lubricating oil guided by the lubricating oil supply trough section. Lubrication of the transmission, characterized in that a supply hole portion for supplying the oil is bored and a return hole portion for recovering the lubricating oil overflowing from the oil sump portion beyond the weir and returning it to the oil pan is provided. apparatus.