JPH11270565A - Lubrication device of tapered roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of the seizure in traction of a vehicle even when the forced lubrication is stopped in a lubrication device of a tapered roller bearing. SOLUTION: An oil pit 8 is formed b providing an oil storage means in a separate tapered roller bearing adjacent to a tapered roller bearing which is a pilot bearing. The storage means comprises a ring-like lip 6 fitted to a large diameter side of an inner circumference of an outer ring of the separate tapered roller bearing 4, a ring-like plate 7 fitted to a small diameter side of the inner circumference of the outer ring. The oil flows into the tapered roller bearing 3 to prevent the seizure when the forced lubrication is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lubricating device for a tapered roller bearing, and more particularly to a lubricating technique for a tapered roller bearing used in a transmission, a transfer, a reduction gear, and the like.

[0002]

2. Description of the Related Art Conventional tapered roller bearings are lubricated in consideration of the fact that they have less oil holding power than flat roller bearings. For example, forced lubrication by an oil pump, gear rotation droplet flow, oil path I went for consideration, etc. However, when the clutch is disconnected, coasting at the neutral position for shifting, or rotation of the transmission shaft by the drive wheels during towing of the vehicle, there is no forced lubrication caused by the engine rotation or lubrication to the bearings due to lack of rotation splashing and oil shortage. Image sticking was likely to occur. In order to avoid this, it was necessary to restrict the coasting for a long time or to remove the propeller shaft for long-time towing.

[0003]

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a lubricating device for a tapered roller bearing having improved lubricating performance by preventing seizure due to oil shortage. .

[0004]

SUMMARY OF THE INVENTION Therefore, the invention according to claim 1 is a lubricating device for a tapered roller bearing, wherein the tapered roller bearing has a separate tapered roller adjacent to a large-diameter outside of an inner periphery of an outer ring of the tapered roller bearing. In a configuration in which a large-diameter side of the inner circumference of the outer ring of the bearing is provided, a stagnation means for stagnation of a flow of oil lubricating the bearing is provided on the outer ring of the separate tapered roller bearing.

[0005] As a result, the oil supplied to the adjacent separate tapered roller bearing is retained by the retaining means, whereby an oil reservoir is formed, and even when the oil is not supplied from the oil pump and the lubrication is low, the oil reservoir is formed. Oil is used to lubricate the loaded tapered roller bearing to prevent seizure. In the invention according to claim 2, the stagnation means includes a lip formed of an elastic body having a metal ring on an outer periphery attached to a large-diameter side of an inner periphery of the outer race of the separate tapered roller bearing, and the separate lip. A ring-shaped oil reservoir plate attached to the small diameter side of the inner periphery of the outer ring of the tapered roller bearing.

Thus, the flow of oil in the radial direction from the large diameter side of the inner circumference of the outer ring of the separate tapered roller bearing is regulated,
Restricting the lubricating oil flowing in the horizontal direction from the small diameter side of the outer periphery of the outer ring of the separate tapered roller bearing to create an oil reservoir, the oil lubricating the separate tapered roller bearing is retained in the oil reservoir,
Thereby, the lubricating property of the loaded tapered roller bearing is improved.

According to a third aspect of the present invention, there is provided a lubricating device for a tapered roller bearing, wherein a large-diameter side of an outer periphery of an outer ring of a separate tapered roller bearing is adjacent to a large-diameter outer periphery of an inner periphery of an outer ring of the tapered roller bearing. In the configuration provided, retaining means for retaining the flow of lubricating oil for lubricating the bearing on the outer ring of the separate tapered roller bearing is provided, and oil from the retaining means is provided on the large diameter side of the inner circumference of the outer ring of the tapered roller bearing. It is characterized in that a regulating means for regulating the outflow of water is provided.

Accordingly, in addition to the stagnation means retaining the oil in the separate tapered roller bearing in the oil pool, the regulating means provided in the tapered roller bearing assists the stagnation to increase the amount of oil supplied to the tapered roller bearing. be able to.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which an embodiment of the present invention is applied to a pilot bearing of a transmission 20. Rear of engine not shown (left side of drawing)
A tapered roller bearing 3 serving as a pilot bearing is attached to an end of a main shaft 10 inside one end of a pilot shaft 1 which is rotatably supported by a clutch and is connected and disconnected by a clutch. A separate tapered roller bearing 4 is mounted on the second gear 5 adjacent to the tapered roller bearing 3. A lip 6 and a plate 7 are provided on the inner periphery of a gear 5 forming an outer ring of the tapered roller bearing 4 as stagnation means for forming an oil reservoir.

Further details will be described with reference to FIGS.
The pilot shaft 1, one end of which is rotatably supported by a bearing 2 attached to the front part of a transmission case 18, is firstly supported by a sleeve 16 via a speed change synchronizing device 15.
Is configured to transmit the engine driving force via the gear 12. An inner peripheral portion 3a of the outer ring of the tapered roller bearing 3 is formed at a rear portion (right side in the drawing) of the pilot shaft 1.
The tapered roller bearing 3 supports the main shaft 10 via a roller and an inner ring.

A separate tapered roller bearing 4 adjacent to the rear of the tapered roller bearing 3 is configured such that the inner peripheral portion 4a of the second gear 5 is the outer periphery of the outer ring. The ring 6a is formed of a metal ring 6a which is one of the retaining means for retaining the oil on the large diameter side of the inner peripheral portion 4a of the tapered roller bearing 4, and rubber which is an elastic member formed integrally with the ring 6a. A lip 6 (see FIG. 4) having a rubber lip is provided. The tip of the lip 6 is provided so as to stay in contact with the end surface 3b of the inner peripheral portion 3a of the tapered roller bearing 3 which is extended on the large diameter side.

A plate 7 (see FIG. 5), which is another one of the retaining means, is mounted on the small diameter side of the inner peripheral portion 4a. The inner diameter of the plate 7 is preferably slightly larger than the outer diameter of the collar 11, and the gap is preferably small. An oil reservoir 8 is formed by the lip 6 and the plate 7. FIG. 3 shows a case where the outer ring of the separate tapered roller bearing 4 is single, and shows an embodiment in which a lip 6 is provided on the front end surface of the outer ring and a plate 7 (see FIG. 5) is provided on the rear end surface.

Here, reference numerals 1a, 10a and 11a indicate oil passages. Next, the operation will be described. When the vehicle is in the engine operating state, both running and stopping are performed by oil supply from the oil pump, directly from the oil passage 1a of the pilot shaft 1 to the tapered roller bearing 3 as shown by the arrow B, to a separate tapered roller bearing 4. Are the oil passages 10a, 11
A is sufficiently supplied as shown by an arrow A from FIG.
reference).

However, when the transmission is driven from the drive wheels by traction or the like without operating the engine,
In the conventional configuration, the oil supply from B and A in FIG. 6 is cut off, resulting in insufficient lubrication. However, according to the present invention, the oil flow outward in the radial direction is stopped by the lip 6, and the oil flow in the horizontal direction is suppressed by the plate 7, so that the oil sump 8 is formed.

The oil stored in the oil sump 8 causes the oil passage 1 in the center of the main shaft 10 to be pulled during the towing operation.
The residual oil in Oa flows to the tapered roller bearing 3 which is responsible for the rotation and thrust of the main shaft 10 as shown in FIG. 6C, thereby keeping the minimum lubrication and preventing seizure. FIG. 7 shows another embodiment, in which the separate tapered roller bearing 4 is used.
In addition to the formation of an oil sump 8 by the lip 6 and the plate 7, the oil sump is provided by providing a ring-shaped lip 9 which is a restricting means for restricting the outflow of oil on the large diameter side of the inner circumference of the outer ring of the tapered roller bearing 3. The effect is increasing.

[0016]

As described above, according to the first aspect of the present invention, the lack of lubrication of the tapered roller bearing when the engine stops rotating is compensated by the oil retaining means provided on the adjacent tapered roller bearing. Accordingly, oil is supplied to the tapered roller bearing, which is subject to rotation and thrust, so that seizure can be prevented.

According to the second aspect of the present invention, the oil retaining means is provided with a lip on the outer ring large diameter side of the separate tapered roller bearing to restrict the oil flow to the radially outward direction, and to provide an inner ring of the outer ring. Since the plate is provided on the small diameter side to restrict the oil flow in the horizontal direction, the volume of the oil reservoir can be increased. According to the invention of claim 3, in addition to the oil retaining means provided in the separate tapered roller bearing, the tapered roller bearing is provided with a lip which is a regulating means for regulating oil outflow from the oil reservoir. Therefore, the effect of the oil pool can be increased.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a transmission to which a lubricating device for a tapered roller bearing of the present invention is applied.

FIG. 2 is a side sectional view showing the vicinity of the lubricating device according to the first embodiment;

FIG. 3 is an explanatory diagram of an embodiment of a lubrication device.

FIG. 4 is a side sectional view showing the lip according to the first embodiment;

FIG. 5 is a side sectional view showing the plate according to the first embodiment;

FIG. 6 is an explanatory view showing the operation of FIG. 2;

FIG. 7 is a side sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 pilot shaft 1a oil passage 2 pilot shaft bearing 3 tapered roller bearing 3a inner peripheral surface 3b end surface 4 separate tapered roller bearing 4a inner peripheral surface 5 second gear 6 lip 6a ring 6b rubber lip 7 plate 8 oil reservoir 9 lip 10 main Shaft 10a Oil passage 11 Collar 11a Oil passage 12 First gear 15 Transmission synchronization device 16 Sleeve 18 Transmission case

Claims (3)

[Claims] 1. A lubricating device for a tapered roller bearing, wherein a large-diameter side of an inner circumference of an outer ring of a separate tapered roller bearing is provided adjacent to a large-diameter outer side of an inner circumference of an outer ring of the tapered roller bearing, A lubricating device for a tapered roller bearing, wherein a retaining means for retaining a flow of oil for lubricating the bearing is provided on an outer ring of the separate tapered roller bearing. 2. The lip formed by an elastic body having a metal ring on an outer periphery attached to a large-diameter side of an inner periphery of an outer ring of the separate tapered roller bearing, and the separate tapered roller bearing. 2. A lubricating device for a tapered roller bearing according to claim 1, further comprising: a ring-shaped oil reservoir plate attached to a small diameter side of an inner circumference of said outer ring. 3. A lubricating device for a tapered roller bearing, wherein a large-diameter side of an inner circumference of an outer ring of a separate tapered roller bearing is provided adjacent to a large-diameter outer side of an inner circumference of an outer ring of the tapered roller bearing, A retaining means for retaining the flow of lubricating oil for lubricating the bearing is provided on the outer ring of the separate tapered roller bearing, and the outflow of the lubricating oil from the retaining means is regulated on the large diameter side of the inner circumference of the outer ring of the tapered roller bearing. A lubricating device for tapered roller bearings, comprising a regulating means.