JPH10176720A - Lubricating device for conical roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the minimum necessary amount of oil even during use in a low lubricating condition so as to prevent burning or the like by providing a regulating means for regulating the flow of lubricating oil for lubricating a conical roller bearing in the large diameter side of the outer ring inner periphery of the bearing in a conical roller bearing lubricating device used for various reduction gears. SOLUTION: For a pilot bearing section in the front side of a transmission, a conical roller bearing 3 having an outer ring integrally formed inside a main drive gear 1 is attached to one end of a main shaft 10. The main drive gear 1 is supported by a conical roller bearing 2. In this case, the conical roller bearing 3 includes, in the large diameter side of its inner peripheral surface 3a, a lip 4 having a lip part composed of a metallic ring and an elastic member. Thus, if traction is performed while the transmission is in a neutral state, a minimum lubricating condition is maintained by oil held inside the lip 4 and burning is satisfactorily prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a tapered roller bearing used in various transmissions such as a transfer of a vehicle transmission.

[0002]

2. Description of the Related Art In recent years, as the output of a vehicle has increased, a bearing having a large capacity has been required for a vehicle transmission. Since tapered roller bearings can be used with a large capacity in a compact space, their use tends to increase. It is well-known that tapered roller bearings have a slanted rolling surface compared to cylindrical roller bearings, and because oil tends to flow due to centrifugal force, the oil holding power is weak and more oil is required. is there.

[0003] Therefore, under the condition that the oil supply by the oil pump or the oil spill from the gears is insufficient, for example, when the vehicle is towed, the engine is stopped and the transmission is in a neutral state, and the oil from the oil pump is Although there is no supply and no oil is splashed by the gears, on the other hand, if the shaft of the transmission rotates due to the rotation of the tire due to traction, there is a problem that seizure easily occurs due to lack of oil.

On the other hand, in order to prevent seizure due to running out of oil when the vehicle is towed as described above, for example, it is possible to remove the propeller shaft so that the transmission shaft does not rotate even when the vehicle is towed. It was done. However, the work of removing the propeller shaft and reassembling it after towing is cumbersome and troublesome, and the work cost is high.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems, and is intended to provide a tapered roller bearing which secures a minimum necessary oil even in use in a low lubrication condition and prevents seizure. It aims to provide lubrication equipment.

[0006]

SUMMARY OF THE INVENTION A lubricating device for a tapered roller bearing according to the present invention is a lubricating device for a tapered roller bearing used in various transmissions such as a vehicle transmission and a transfer. A restricting means for restricting the flow of lubricating oil for lubricating the bearing is provided on the large diameter side.

[0007] In practicing the present invention, the regulating means includes:
The lip is preferably formed of an elastic body having a metal ring on the outer periphery attached to the inner periphery on the large diameter side of the outer ring.

Further, in the present invention, it is preferable that the restricting means is a ring-shaped oil reservoir plate attached to a large diameter side of the inner periphery of the outer ring.

Further, in the present invention, the restricting means includes:
It is preferable that the lip is provided on the roller retainer and is formed of an elastic member whose outer periphery is in contact with the large diameter side of the inner periphery of the outer ring.

Alternatively, it is preferable that the restricting means is a ring-shaped metal plate provided between the large-diameter end surface of the inner race and the shaft and having a lip formed of an elastic member on the outer periphery.

In addition, it is preferable that the restricting means is a metal plate having a lip formed of an elastic member on an outer periphery and provided with an oil hole.

Preferably, the restricting means is a ring formed of an elastic member having a lip on the inner side attached to the inner circumference of the outer ring on the large diameter side.

Further, it is preferable that the restricting means is a ring-shaped elastic member provided between the large-diameter end surface of the inner race and the shaft and having a lip on the outer periphery.

[0014] In addition, it is preferable that the restricting means is formed in the inner race and has a shape protruding outward in the radial direction.

According to the present invention having the above-described structure, the regulating means for regulating the flow of the lubricating oil for lubricating the tapered roller bearing is provided on the large diameter side of the inner periphery of the outer ring of the tapered roller bearing. Even in a situation where the oil supply to the tapered roller bearing is insufficient, as in the case, lubricating oil does not completely flow out by the restricting means but remains in the region closer to the oil supply side than the restricting means. Therefore, the lubricating oil remaining in the vicinity of the regulating means can ensure the minimum lubrication, and can prevent seizure of various transmissions such as a transmission and a transfer in a low lubrication state.

Here, according to the preferred structure of the present invention as described above, the restricting means does not block the radially inward region or has a structure in which an oil hole is perforated. I have. Therefore, in a state where the oil is supplied from the oil pump or the oil is being scooped up by the gear, the lubricating oil is in a region where the regulating means is not closed,
Alternatively, it flows out of an oil hole formed in the regulating means. That is, the restriction means is prevented from obstructing the circulation of the lubricating oil.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross section of a pilot bearing portion at a front portion of a transmission according to an embodiment of the present invention, and a tapered roller bearing 3 in which an outer ring is a pilot bearing integrally formed inside a main drive gear 1. Is attached to one end of the main shaft 10. Also,
The main drive gear 1 is supported by tapered roller bearings 2 and the other end is supported by a bearing provided at the center of a flywheel (not shown) of the engine.

On the large diameter side of the inner peripheral surface 3a corresponding to the inner periphery of the outer ring of the tapered roller bearing 3, as shown in FIG. A lip 4 having a lip portion 4a made of rubber, which is an elastic member formed integrally, is provided. Here, reference numerals 1a and 10a denote oil passages, 11 is a synchronizer cone, 12 is a synchronizer ring, 13 is a sleeve, 14 is a lock plunger, 15 is a spring,
6 is a synchronizer hub, 17 is a needle roller, 18
Is a transmission case, 19 is an oil seal, 2
0 indicates an N-speed main gear, and 21 indicates an inner wheel.

Next, the operation will be described.

When the vehicle is traveling normally or temporarily stopped while the engine is running, the oil supplied from the oil passage 1a of the main drive gear 1 is changed to A and B with reference to FIG. Sufficiently supplied and operated under abundant lubrication conditions. On the other hand, in the case where the vehicle is pulled out with the engine stopped and the transmission in a neutral state due to a failure or the like, as shown in FIG. Can be held,
If the speed is low and the load is low, burn-in can be sufficiently prevented.

FIG. 5 shows another embodiment, in which a ring-shaped oil reservoir plate 24 made of metal is attached to the outer race 21.
This is provided on the large diameter side of the inner circumference 1a of (1), and the structure is very simple.

FIG. 6 shows another embodiment, in which a roller retainer 3a is provided with a lip made of rubber as an elastic body and in contact with the inner periphery 1a of the outer race 21, which has the advantage of being easy to assemble. Have.

That is, when assembling, if the outer ring side is fixed and the inner ring side is merely fitted, the assembling work becomes extremely easy. And in the embodiment of FIG.
Since the restricting means is a lip made of an elastic body (rubber), when the inner ring is fitted, the restricting means is elastically deformed,
There is no interference with the inner ring side. In other words, in the embodiment of FIG. 6, assembly can be performed by a simple operation of fixing the outer ring side and fitting the inner ring side.

FIG. 7 shows another embodiment, in which a lip 26a made of rubber is integrally provided on the outer periphery of a ring-shaped plate 26 made of metal, and the lip 26a is attached to the inner periphery 1a of the outer ring 21. The shaft 1
Since it is attached between the step of 0 and the end face of the inner ring, there is an advantage that a commercially available bearing can be used as it is.

FIG. 8 shows the oil hole 2 in the plate 26 of FIG.
7b so that the oil flow rate during normal operation is not restricted. 7 and 8 may be selected according to the lubrication characteristics of the transmission.

FIG. 9 shows the lip 4 of FIG. 2 integrally formed of rubber, and FIG. 10 shows the lip 4 of FIG. 7 integrally formed of the same rubber as the lip 29 instead of the plate 26. It would be better if the hardness of the parts other than the lip could be increased.

In the embodiment shown in FIG. 9, even when the outer ring side is fixed and the inner ring side is fitted to assemble, the lip 4 as the restricting means is elastic when the inner ring side is fitted. It does not interfere because it is deformed. Therefore, there is an advantage that the assembling work is performed extremely easily.

[0029]

According to the present invention as described above, the minimum lubrication can be ensured even in a situation where the oil supply to the tapered roller bearings is insufficient, and seizure of various transmissions such as a transmission and a transfer in a low lubrication situation is ensured. Can be prevented.

Further, the circulation of the lubricating oil is not hindered even in a normal lubricating condition.

Further, if the restricting means of the present invention is configured to be elastically deformable, an operation and effect that the assembling work becomes extremely easy can be achieved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a tapered roller bearing of a transmission according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the lip of FIG. 1;

FIG. 3 is a diagram for explaining the operation when the oil supply is sufficient.

FIG. 4 is a diagram for explaining the operation when the oil supply is insufficient.

FIG. 5 is a diagram showing another embodiment of the present invention.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a diagram showing another embodiment of the present invention.

FIG. 8 is a view showing another embodiment of FIG. 7;

FIG. 9 is a view showing another embodiment of FIG. 2;

FIG. 10 is a diagram showing another embodiment of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main drive gear 3 ... Tapered roller bearing 4 ... Lip 4b ... Metal ring 10 ... Main shaft 11 ... Synchronizer cone 12 ... Synchronizer ring 13 ... Sleeve

Claims (9)

[Claims] In a lubricating device for a tapered roller bearing used in various transmissions such as a transmission and a transfer of a vehicle, a flow of lubricating oil for lubricating the bearing is provided on a large-diameter side of an inner periphery of an outer ring of the tapered roller bearing. A lubricating device for tapered roller bearings, comprising a regulating means for regulating. 2. The lubricating device for a tapered roller bearing according to claim 1, wherein said regulating means is a lip formed of an elastic body having a metal ring on an outer periphery attached to an inner periphery on a large diameter side of an outer ring. 3. The lubricating device for tapered roller bearings according to claim 1, wherein said restricting means is a ring-shaped oil sump plate attached to the large diameter side of the inner circumference of the outer ring. 4. The lubricating device for tapered roller bearings according to claim 1, wherein said restricting means is a lip provided on a roller cage and having an outer periphery formed by an elastic member in contact with a large diameter side of an inner periphery of an outer ring. 5. The tapered roller bearing according to claim 1, wherein the restricting means is a ring-shaped metal plate provided between the large-diameter end surface of the inner ring and the shaft and having a lip formed of an elastic member on the outer periphery. Lubrication equipment. 6. A lubricating device for a tapered roller bearing according to claim 5, wherein said regulating means is a metal plate having a lip formed of an elastic member on an outer periphery and having an oil hole. 7. The lubricating device for a tapered roller bearing according to claim 1, wherein the restricting means is a ring formed of an elastic member having a lip on an inner side attached to an inner periphery of a large diameter side of the outer ring. 8. The lubricating device for a tapered roller bearing according to claim 1, wherein the restricting means is a ring-shaped elastic member provided between the large-diameter end surface of the inner race and the shaft and having a lip on the outer periphery. 9. The lubricating device for tapered roller bearings according to claim 1, wherein said restricting means has a shape formed on the inner race and protruding radially outward.