JPS6314131Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating device for a rear bearing of a through-shaft passing through a rear and front axle housing of a rear two-axle drive vehicle.

In a rear wheel two-axle drive automobile, as shown in FIG. It is designed to transmit power to. The through shaft 2 is supported by bearings 4 and 4' at the rear of the housing 1, and is kept oil-tight by an oil seal 5.

The bearings 4, 4' are held in a retainer 6, as shown in detail in FIG. 2, and the retainer 6 is fitted into the housing 1 and fixed to the housing 1 by a cover 7. The lip is fitted in such a way that it slides closely against a yoke 2' attached to the throughshaft 2.

In order to lubricate the bearings 4, 4' and the oil seal 5, an oil catcher is used to collect the lubricating oil that is scraped up and dropped by the rotating tooth surface of the drive gear 3 as shown by the arrow due to its viscosity. 8 is provided.

The oil catcher 8 projects inward from the housing 1 from the lower part of the retainer 6 and has an arc-shaped body with a truncated conical surface 9 inclined in the axial direction of the through shaft 2. formed in the body.

The lubricating oil collected by oil catcher 8 is
While directly lubricating the inner bearing 4 as shown by the arrow,
The lip of the oil seal 5 is lubricated through a groove 10 formed in the bottom of the inner hole of the retainer 6, and the outer bearing 4' is further lubricated.

However, the amount of lubricating oil scooped up by the drive gear 3 changes depending on the rotation speed of the drive gear 3, so the amount falling into the oil catcher 8 also changes, and the viscosity changes due to temperature changes. Since the falling amount also changes depending on changes in the amount of lubricating oil, it is difficult to secure a stable and sufficient amount of lubricating oil.

Utility Model Application Publication No. 53-100640 also discloses a lubricating oil supply device, but in this case as well, the oil that falls from the gear is guided to a predetermined lubricating part, so that There was a problem in that the amount of oil supplied increased and decreased, making it impossible to obtain sufficient lubrication.

The present invention is intended to solve the above-mentioned problems, and aims to provide a lubricating device for a bearing that supports a through shaft, which has improved lubrication performance by providing a lubricating oil introduction hole in the oil catcher.

Embodiments will be described below based on the drawings. In FIGS. 3 to 5, the same or equivalent parts as in FIG.

In FIGS. 3 and 4, the oil catcher 8, which is formed in the shape of a gutter with a substantially semicircular conical surface, has a lubricating oil introduction hole 11 in the upper part on the side of the drive gear 3.
is provided. (The details of the lubricating oil introduction hole 11 are shown in FIG. 5.) That is, the space formed between the truncated conical surface 9 of the oil catcher 8 and the tooth surface of the drive gear 3 adjacent thereto. is located in a part that gradually becomes narrower in the direction of rotation of the drive gear 3,
A lubricating oil introduction hole 11 is opened on the side surface of the truncated conical surface 9, and the lubricating oil scraped up by the drive gear 3 is forced into the tapered space, and the lubricating oil is introduced into the area where the pressure has increased. It is adapted to be taken out into the interior of the oil catcher 8 through the hole 11.

Since the oil catcher 8 is provided with the lubricating oil introduction hole 11 in this way, the lubricating oil scraped up by the drive gear 3 rises along the truncated conical surface 9 of the oil catcher 8, and Under dynamic pressure, the lubricating oil flows into the oil catcher 8 from the lubricating oil introduction hole 11 as shown by the arrow, and lubricates the bearings 4, 4' and the oil seal 5 together with the lubricating oil that falls from above and is collected.

Therefore, regardless of the rotational speed of the drive gear 3, a sufficient amount of lubricating oil is stably supplied to the bearings 4, 4' and the oil seal 5. Furthermore, since the conventional flow of lubricating oil, which utilizes the scraping up of lubricating oil by the rotation of the drive gear, is not changed, the structure is simple and inexpensive.

As described above, the present invention provides a through-shaft that passes through the rear-front axle housing of a rear-wheel two-axle drive vehicle and transmits power to the rear and rear axles. a gutter-like oil catcher is integrally formed in a part of the retainer and located on the lower surface of the through shaft;
The side surface of the oil catcher was disposed close to the tooth surface of the drive gear, and the lower surface of the oil catcher was formed into a truncated conical surface so as to guide the lubricating oil received in the oil catcher to the bearing. In the bearing lubricating device, a space formed between a truncated conical surface of the oil catcher and a tooth surface of the drive gear adjacent thereto becomes gradually narrower in the rotational direction of the drive gear. Since the lubricating oil introduction hole is opened in the side surface of the truncated conical surface, the lubricating oil scraped up by the rotation of the drive gear is transferred between the tooth surface of the drive gear and the cutout of the oil catcher. defined by the conical surface,
Push into the space that gradually becomes narrower in the direction of gear rotation,
Using this dynamic pressure, lubricating oil can be reliably and efficiently fed into the oil catcher from the lubricating oil introduction hole opened in this space. Compared to the conventional method, which simply receives the lubricating oil that falls after being scraped up by the drive gear, the amount of lubricating oil introduced has less variation, and in other words, it is stable even at low rotational speeds. Since the required amount of lubricating oil can be introduced, good lubrication performance can always be ensured.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the rear and front axles of a two-axle drive vehicle including a rear bearing that supports a conventional through-shaft; Fig. 2 is a partially enlarged side sectional view of Fig. 1;
Figure 3 is a side sectional view showing one embodiment of the present invention;
The figure is a view taken along arrow A in FIG. 3, and FIG. 5 is a partial perspective view of the oil catcher shown in FIG. 4. 1... Rear and front shaft housing, 2... Through shaft, 3... Drive gear, 4, 4'... Bearing, 5
...Oil seal, 6...Retainer, 7...Cover, 8...Oil catcher, 11...Lubricating oil introduction hole.

Claims (1)

[Scope of utility model registration request] A through-shaft that passes through the rear and front axle housings of a two-axle rear-wheel drive vehicle and transmits power to the rear and rear axles.
The rear and front shaft housings are supported by bearings housed inside a retainer, and a gutter-shaped oil catcher is integrally formed in a part of the retainer and located on the lower surface of the through shaft. Lubrication of a bearing in which the side surface of the oil catcher is placed close to the tooth surface of the drive gear, and the lower surface of the oil catcher is formed into a truncated conical surface so as to guide the lubricating oil received in the oil catcher to the bearing. In the device,
A space formed between a truncated conical surface of the oil catcher and a tooth surface of the drive gear adjacent thereto is located at a portion that gradually becomes narrower toward the rotational direction of the drive gear, A lubricating device for a bearing, characterized in that a lubricating oil introduction hole is opened on a side surface of the truncated conical surface.