JPH11344039A - Rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing having a rotary member supported thereby, in which the play in the rotating direction of the rotary member is absorbed. SOLUTION: A rolling bearing A has at least one raceway ring, either inner ring 1 or outer ring 2, wherein a friction damper 5 is installed between the peripheral surface at the axial end of the raceway ring 1/2 and that peripheral surface of the other raceway ring member 2/1 which is positioned confronting the mentioned axial end peripheral surface in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a rolling bearing. This rolling bearing is used for a transmission such as a transmission of an automobile or a transfer of a four-wheel drive vehicle.

[0002]

2. Description of the Related Art For example, in a transmission such as a transmission of an automobile or a transfer of a four-wheel drive vehicle, abnormal noise may be generated due to a collision of a meshing portion between a driving gear and a driven gear.

As an example of the transmission, a transfer of a four-wheel drive vehicle will be described with reference to FIG. In the figure, B indicates the entire transfer, 70 is a case, 71 is a main shaft, 72 is a main gear, 73 is a low gear, 74
Is a synchromesh mechanism, 75 is a counter gear, 76
Is a front drive sprocket, 77 is a front drive shaft, 78 is a drive chain, and 79 is an oil seal.

In such a transfer B, between the case 70 and the main shaft 71, between the case 70 and the main gear 72, between the case 70 and the counter gear 75, and between the main shaft 71 and the main gear 72 or the low gear 73. Various rolling bearings 80 to 85 are interposed between them.

In such a transfer B, for example, if the input rotation speed to the main shaft 71 fluctuates, in a severe case, the main gear 72 or the low gear 73 as the driving gear collides with the counter gear 75 as the driven gear. As a result, abnormal noise may be generated. That is, since the backlash exists between the main gear 72 or the low gear 73 and the counter gear 75, the counter gear 75 is rotated by the inertia force when the rotation speed of the main gear 72 or the low gear 73 temporarily decreases. As a result, the counter gear 75 may collide with the main gear 72 or the low gear 73.

As a countermeasure against such abnormal noise, use of a sub gear 86 and a dish spring 87 as shown in FIG. 6 has been considered. That is, the sub gear 86 is mounted on the side of the counter gear 15, and the sub gear 86 is pressed against the counter gear 75 by the elastic urging force of the dish spring 87. 88 is a retaining ring.

As described above, if the rotational resistance is given to the counter gear 75, even if the rotational speed of the main gear 72 or the low gear 73 is temporarily reduced due to the fluctuation of the input rotational speed to the main shaft 71, the counter gear 75 75
, It is possible to prevent the counter gear 75 from colliding with the main gear 72 or the low gear 73.

[0008]

However, in the above-described countermeasures against abnormal noise, a large number of extra parts are used, so that the cost of parts and the number of assembly steps must be increased.

On the other hand, the present applicant mounts a well-known friction damper (not shown) at an appropriate place between the counter gear 75 and the case 70 as an alternative to the above-described sub-gear 86 and dish spring 87. I thought that. Also in this case, the number of parts can be reduced as compared with the above-described sub gear 86 and dish spring 87, and the generation of abnormal noise can be prevented as in the above case.

When the friction damper is used as described above, although the number of parts can be reduced as compared with the above-described countermeasure against abnormal noise, the number of assembly steps of the transfer B is reduced because new parts which are not the main parts of the transfer B are still used. There is no change to increase. In addition, when the friction damper as described above is incorporated into a use object, it is necessary to secure a dedicated arrangement space, and for example, a partial design change of the transfer B is inevitable.

In view of such circumstances, the applicant of the present application has considered to incorporate a friction damper in a rolling bearing which is an existing component of a transmission such as a transfer B, for example. This is the object of the present invention.

[0012]

According to a first aspect of the present invention, there is provided a rolling bearing having at least one of an inner ring and an outer ring. A friction damper that gives rotational resistance and allows oil to pass in the axial direction is mounted between the bearing ring member and the peripheral surface radially opposite to the shaft end peripheral surface.

According to a second aspect of the present invention, in the rolling bearing according to the first aspect, the friction damper is formed by attaching an elastic body to an annular metal core, and the elastic body is arranged in a radial direction with respect to a rotation resistance applying object. Are elastically brought into contact with each other.

As described above, in the present invention, by incorporating the friction damper into the rolling bearing, even if the rotating member supported by the rolling bearing has a play in the rotational direction, the play is absorbed by the friction damper of the rolling bearing. As a result, advance and delay of rotation can be suppressed.

Thus, when the rolling bearing of the present invention is used instead of the existing rolling bearing used for an object such as a transmission, not only the occurrence of abnormal noise of the transmission can be prevented, but also the friction can be prevented. As compared with a case where the damper alone is incorporated separately, waste of space and labor for assembling can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS.

FIGS. 1 and 2 relate to an embodiment of the present invention. FIG. 1 is a longitudinal side view of a rolling bearing, and FIG.
It is an arrow view of (2)-(2) line cross section of FIG.

In the drawing, A indicates the entire rolling bearing, and here, a deep groove ball bearing is exemplified. The rolling bearing A includes an inner ring 1, an outer ring 2, a plurality of rolling elements 3, a retainer 4, and a friction damper 5.

The friction damper 5 has a substantially L-shaped cross section attached to the inner peripheral surface of the shoulder at one axial end of the outer race 2 by press fitting.
And an inner ring 1 attached to the annular core 6
And an elastic body 7 to be brought into contact with the outer peripheral surface of the elastic member 7. The annular core 6 includes a cylindrical portion 6a and an annular plate portion 6b extending radially inward from one axial end thereof, and an elastic body 7 is attached to the inner surfaces thereof. In addition, semicircular notches 7a that allow oil to pass in the axial direction are provided at several locations on the inner circumference of the elastic body 7.

The friction damper 5 is designed to impart an appropriate rotational resistance by causing the elastic body 7 to come into contact with the outer peripheral surface of the inner race 1 with a required repulsive elastic force from the radial direction.

The rolling bearing A with the friction damper 5 is used for each part of a transfer B of a four-wheel drive vehicle as shown in FIG. Specifically, rolling bearings 82, 8 between case 70 and counter gear 75
When the rolling bearing 3 is the above-described rolling bearing A of the present invention, it is possible to prevent the collision between the main gear 72 or the low gear 73 and the counter gear 75 which causes abnormal noise.

That is, since the inner ring 1 of the rolling bearing A is integrated with the counter gear 75, the friction damper 5 built in the rolling bearing A gives the counter gear 75 a required rotational resistance. The friction damper 5 in this case includes a counter gear 7
It is desirable to provide a rotational resistance of 5 or more. For this reason, the main gear 72 or the low gear 7
3, the counter gear 75 follows the advance or delay of the main gear 72 or the low gear 73, so that the meshing portion between the main gear 72 or the low gear 73 and the counter gear 75 can be hardly separated. As a result, a collision between the main gear 72 or the low gear 73 and the counter gear 75 can be prevented, and generation of abnormal noise can be prevented. Moreover, as the transfer B, rolling bearings 82 and 83 which are existing parts are used.
Since it is enough to change to the rolling bearing A of the present invention,
There is no need to secure a dedicated space or change the design of a part of the transfer B as in the case of incorporating the friction damper alone in the transfer B described in the conventional example, and there is no need to increase the number of assembling steps. It is extremely excellent in sex.

It should be noted that the present invention is not limited to the above-described embodiment, and various applications and modifications are conceivable.

(1) The form of the rolling bearing A is not limited to the deep groove ball bearing in the above embodiment, but may be an angular ball bearing, various roller bearings, or the like. In addition, for example, as shown in FIG. 3, a rolling bearing A in which a shaft body 10 is used instead of the inner ring 1 can be provided.
In the example shown in FIG. 3, the shaft body 10 is a rotating member, and the outer ring 2 is a non-rotating member fixed to a case (not shown), and the friction damper 5 is attached to the outer ring 2. Body 7 to shaft 10
Is brought into contact with the outer peripheral surface.

(2) In the above embodiment, the friction damper 5 has an example in which the elastic body 7 is configured to be in contact with the inner ring body. It is good also as a structure made to contact. For example, FIG.
The friction damper 5 'can be incorporated into the rolling bearing A in the form shown in FIG. In this example, the annular core 6 of the friction damper 5 'is attached to the outer peripheral surface of the extension 1a extending one axial end of the inner ring 1, and the elastic body 7 is applied to the outer annular body 20 to which the outer ring 2 is attached. It is designed to make contact. The inner ring 1 and the outer ring 2 may be configured such that one of them rotates and the other does not rotate,
The inner and outer rings 1 and 2 may be configured to rotate relative to each other.

(3) The shape of the friction dampers 5 and 5 'and the shape and number of the notches 7a provided in the elastic body 7 are not particularly limited.

(4) The application of the rolling bearing A of the present invention is not limited to the transfer B of the four-wheel drive vehicle shown in FIG. 5, but may be a transmission of an automobile (not shown). it can.

[0028]

According to the first and second aspects of the present invention, the friction damper is incorporated in the rolling bearing, so that even if the rotating member supported by the rolling bearing has a play in the rotational direction, the friction damper of the rolling bearing is provided. Thereby, the play can be absorbed and the advance and delay of the rotation can be suppressed.

Therefore, when the rolling bearing of the present invention is used, for example, as a counter gear supporting portion of a transfer of a four-wheel drive vehicle, the collision between the main gear or the low gear and the counter gear which causes abnormal noise can be effectively prevented. Not only can it be prevented, but there is no need to secure a dedicated space, as compared to the case where a single-piece friction damper as described in the conventional example is incorporated in the transfer, and it is possible to reduce the assembly cost by reducing the time and effort of assembling. Will be able to contribute to

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of a rolling bearing according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a longitudinal sectional side view of a rolling bearing according to another embodiment of the present invention.

FIG. 4 is a longitudinal sectional side view of a rolling bearing according to still another embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing a transfer of a general four-wheel drive vehicle.

FIG. 6 is an enlarged view around the counter gear of FIG. 5;

[Explanation of symbols]

 A Rolling bearing 1 Inner ring 2 Outer ring 5 Friction damper 6 Annular core of friction damper 7 Elastic body of friction damper 7a Notch of elastic body

Continued on the front page (72) Inventor Hiromi Kawanishi 3-5-8 Minamisenba, Chuo-ku, Osaka-shi Inside Koyo Seiko Co., Ltd. (72) Inventor Mitsuhiro Inada 3-58-8 Minamisenba, Chuo-ku, Osaka-shi Koyo Seiko Co., Ltd. (72) Inventor Takeshi Shibuya 39, Nishino, Nishino, Kasagi, Aizumi-cho, Itano-gun, Tokushima Prefecture (72) Inventor Tatsuya Kondo 39, Nishino, Kasagi, Aizumi-cho, Itano-gun, Tokushima Prefecture

Claims (2)

[Claims] 1. A rolling bearing having at least one of an inner ring and an outer ring of a race, wherein a shaft end portion of a peripheral surface of a shaft end of the one race and a race end of a race ring member paired with the one race. A rolling bearing, wherein a friction damper that gives rotational resistance and allows oil to pass in the axial direction is attached between a peripheral surface radially opposite to the peripheral surface of the rolling bearing. 2. The rolling bearing according to claim 1, wherein
A rolling bearing, wherein the friction damper is formed by covering an annular core with an elastic body, and the elastic body is elastically abutted from a radial direction with respect to a rotation resistance imparting target. .