JPH11344041A - Mounting structure of rolling bearing with friction damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent creeping of a raceway ring of a rolling bearing equipped with friction damper, in which no separate component such as a key is used in the bearing mounting structure. SOLUTION: One raceway ring (outer ring 2) of a rolling bearing A equipped with a friction damper 5 is installed in a loose fit condition, i.e., capable of relative rotation, with one ring member (case 70), and a turn stop of the raceway ring is made relative to the ring member by part of the damper 5 (projecting piece). This permits out of use of any key as conventional.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting structure for a rolling bearing with a friction damper. The rolling bearing with the friction damper 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.

A transfer of a four-wheel drive vehicle will be described with reference to FIG. 6 as an example of the transmission. 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, the applicant of the present invention applies rotation resistance to the counter gear 75 with a well-known friction damper (not shown), thereby accommodating fluctuations in the input rotation speed to the main shaft 71. It is considered that when the rotation speed of the main gear 72 or the low gear 73 temporarily decreases, the counter gear 75 is made difficult to advance so that the counter gear 75 does not collide with the main gear 72 or the low gear 73. Here, the arrangement of the friction damper becomes a problem. This is because the friction damper is not an existing part of the transfer B, and if it is provided, it is necessary to secure a dedicated installation space, so that the design of the transfer B must be partially changed. On the other hand, the applicant of the present application has proposed that the friction damper be incorporated in the support bearings 82 and 83 of the counter gear 75. In this case, it is not necessary to secure an installation space for the friction damper alone, so that there is no need to change the design of the transfer B.

[0007]

In the transfer B of the prior art, when the counter gear 75 is assembled, the inner rings (symbols omitted) of the supporting bearings 82 and 83 are fitted to the counter gear 75 in a tight fit state. In this case, the outer rings (symbols omitted) of the support bearings 82 and 83 are loosely fitted to the case 70. That is, if both the inner and outer races are in a tight-fit state, the incorporation of the support bearings 82 and 83 is significantly deteriorated.

However, in the above-described assembling mode, since the outer rings of the support bearings 82 and 83 are loosely fitted to the case 70, there is a concern that the outer rings may creep. Therefore, it is necessary to attach a key between the outer race and the case 70. For this reason, there is room for improvement, for example, the assembling work becomes quite troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rolling bearing mounting structure with a friction damper, which can prevent creep of a bearing ring without using a separate component such as a key.

[0010]

According to a first aspect of the present invention, there is provided a mounting structure for a rolling bearing with a friction damper, which is interposed between two inner and outer rings, wherein the rolling bearing is at least one of an inner ring and an outer ring. The one orbital ring is loosely fitted to the one ring body, and the friction damper is attached to the one orbital ring and is paired with the one orbital ring. A part of the friction damper attached to the one bearing ring is restricted from rotating in the rotating direction with respect to the one ring body while allowing the oil to pass in the axial direction while being brought into contact with the bearing ring member. Installed in state.

According to a second aspect of the present invention, there is provided a mounting structure for a rolling bearing with a friction damper, which is interposed between two inner and outer rings, wherein the rolling bearing has at least one of an inner ring and an outer ring. The one orbital ring is loosely fitted to the one ring body,
The friction damper is brought into contact with an annular core attached to the one race and a race member that is attached to the annular core and forms a pair with the one race, and passes oil in the axial direction. The annular core is provided with a projection that is engaged with a concave portion provided on an end surface of the one-ring body.

According to a third aspect of the present invention, there is provided a mounting structure for a rolling bearing with a friction damper, which is interposed between two inner and outer rings, wherein the rolling bearing has at least one of an inner ring and an outer ring. The one orbital ring is loosely fitted to the one ring body,
The friction damper is brought into contact with an annular core attached to the one race and a race member that is attached to the annular core and forms a pair with the one race, and passes oil in the axial direction. And a protrusion which is engaged with the annular core with a required clearance in a circumferential direction with respect to a concave portion provided on an end surface of the one-sided annular body. A piece is provided.

According to a fourth aspect of the present invention, there is provided a mounting structure for a rolling bearing with a friction damper, which is interposed between two inner and outer ring bodies, wherein the rolling bearing has at least one of inner and outer races. The one orbital ring is loosely fitted to the one ring body, and the friction damper is fitted to the one orbital ring in a loosely fitted state; An elastic body having a notch that is attached and is brought into contact with a bearing ring member that forms a pair with the one bearing ring and that allows oil to pass in an axial direction, and the annular cored bar includes On both the concave groove provided on the end surface of the raceway and the concave portion provided on the end surface of the one-ring body, there is provided a projecting piece which is engaged with a required clearance in the circumferential direction.

According to a fifth aspect of the present invention, in the mounting structure for a rolling bearing with a friction damper according to the fourth aspect, a retaining ring for preventing the friction damper from coming off in the axial direction is attached to the one race.

As described above, in the present invention, in order to improve the assembling property, the one orbit ring of the rolling bearing to which the friction damper is attached is attached to one of the ring bodies in a loose-fit state, that is, in a state where it can be relatively rotated. In addition, as a countermeasure against creep of the raceway which may occur in connection with this stable assembling, by using a part of the friction damper attached to the raceway, the raceway is prevented from rotating with respect to the ring body. I have. This makes it possible to abolish the conventional use of keys.

Further, if the projection of the friction damper is engaged with the concave portion of the one ring body with a required clearance in the circumferential direction as in claim 3, the friction damper and the one orbital ring are provided. And the one-ring body can be relatively rotated by a required angle, so that the one-ring body has a play in the rotation direction.

Further, the friction damper is loosely fitted to one of the races, as in claim 4,
If the projection of the friction damper is engaged with the concave portion of the one ring with a required clearance in the circumferential direction, the friction damper, the one race and the one ring are relatively rotated by a required angle. It becomes rotatable, so that the one-sided ring has rotational play.

Further, as in the fifth aspect, by attaching a retaining ring to one of the races in the configuration of the fourth aspect, it is possible to prevent the friction damper from coming out of the one of the races in the axial direction.

When such a rolling bearing with a friction damper according to the present invention is used as a bearing for supporting a driven gear of a transmission in order to prevent abnormal noise of the transmission, it is possible to improve the assemblability of the rolling bearing. The creep of the race of the rolling bearing can be prevented. In particular, the rolling bearing with the friction damper according to the fourth aspect of the present invention can have a small play in the rotating direction. Therefore, after taking measures against the above-mentioned abnormal noise, the switching operation of the synchromesh mechanism of the transmission is facilitated. Be able to contribute.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on the embodiments shown in FIGS.

Embodiment 1 FIGS. 1 to 3 relate to Embodiment 1 of the present invention.
Is a longitudinal side view of a rolling bearing with friction dampers,
2 is a front view of the rolling bearing with a friction damper of FIG. 1, and FIG. 3 is a front view of the friction damper alone in FIG.

In the figure, 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 is attached to the inner peripheral surface of the shoulder at one axial end of the outer ring 2, and has a substantially L-shaped annular core 6. The elastic body 7 is provided. Ring core 6
Consists of a cylindrical portion 6a fitted tightly to the inner peripheral surface of the shoulder at one axial end of the outer ring 2 and an annular plate portion 6b extending radially inward from the one axial end. The elastic body 7 is attached. Protrusions 6c projecting radially outward are provided at several places around the shaft end of the cylindrical portion 6a. 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 provide an appropriate rotation resistance by causing the elastic body 7 to abut against the outer peripheral surface of the inner race 1 with a required repulsive elastic force in the radial direction.

The rolling bearing A with the friction damper 5 is used, for example, inside a transfer B of a four-wheel drive vehicle as shown in FIG. Specifically, in order to prevent generation of abnormal noise due to collision between the main gear 72 or the low gear 73 and the counter gear 75, the rolling bearings 82 and 83 between the case 70 and the counter gear 75 are connected to the above-described friction damper of the present invention. It is assumed that a rolling bearing A with 5 is provided.

Here, the reason why occurrence of abnormal noise can be prevented will be described. That is, the friction damper 5 built in the rolling bearing A imparts a required rotational resistance to the counter gear 75 integrated with the inner ring 1, so that the input rotational speed to the main shaft 71 fluctuates and the main gear 72
Or, even when the number of revolutions of the low gear 73 is temporarily reduced, the counter gear 75 becomes difficult to advance, and
The counter gear 75 is the main gear 72 or the low gear 7
3 can be prevented from colliding, and the generation of abnormal noise can be prevented. In this case, it is desirable that the friction damper 1 provides a rotational resistance equal to or greater than the inertia moment of the counter gear 75.

Now, a description will be given of a mounting form of the rolling bearing A with the friction damper 5 to the transfer B.

That is, as shown in FIG.
In order not to apply excessive force in the assembled state of
The inner ring 1 of the rolling bearing A is fitted in a tight fit state on the outer peripheral surface of the shaft end of the counter gear 75, and the outer ring 2 is loosely fitted on the inner peripheral surface of the case 70.

In this case, since the outer ring 2 is in a state capable of rotating relative to the case 70, the outer ring 2 may be creeped. In response, case 70
A concave portion 70a is provided at the shaft end of the bearing mounting surface in FIG. Therefore, creep of the outer race 2 can be reliably prevented.

Further, a snap ring 10 is attached to one end of the bearing mounting surface of the case 70 in the axial direction to prevent the friction damper 5 from coming off in the axial direction.

As described above, in the first embodiment, the problem related to the stable mounting of the rolling bearing A, that is, the outer ring 12
Can be reliably prevented without using a separate component such as a key.

Embodiment 2 FIGS. 4 and 5 relate to Embodiment 2 of the present invention.
Is a longitudinal side view of a rolling bearing with friction dampers,
FIG. 5 is a front view of the rolling bearing with friction dampers of FIG.

In the second embodiment, the outer race 2 is
, The counter gear 75 is allowed to rotate relative to the case 70 at a required angle.

Specifically, at several places around the end face of the outer ring 2,
A concave groove 2a is provided along the radial direction.
The projecting piece 6c of the friction damper 5 is engaged with both the concave portion 70a having a required clearance Δw in the front and rear directions in the circumferential direction. As a result, the friction damper 5 can rotate relative to the outer ring 2 and the case 70 by a rotation angle corresponding to the clearance Δw, but the friction damper 5 rotates by the clearance Δw to close the clearance Δw. Then, the friction damper 5 does not move in the rotation direction.

The necessity of such a configuration will be described. As described in the first embodiment described above, the rolling bearing A with the friction damper 5 of the present invention is replaced with the bearing 82 for supporting the counter gear 75, in order to prevent abnormal noise of the transfer B.
In the case of 83, the smoothness of the meshing operation between the shifting key 74a of the synchromesh mechanism 74 and the main gear 72 or the low gear 73 tends to be impaired, and the shift feeling may be reduced.

In the first place, when the synchromesh mechanism 74 is switched, the main gear 72 or the low gear 73 may have an appropriate play so that the shifting key 74a can be smoothly engaged with the main gear 72 or the low gear 73. Is needed.

However, to prevent the generation of abnormal noise, as described above, the friction damper 5 controls the counter gear 7.
Since the play between the counter gear 75 and the main gear 72 or the low gear 73 is eliminated by giving a rotational resistance to the gear 5, the smoothness of the switching operation of the synchromesh mechanism 74 naturally tends to be impaired. .

That is, in the second embodiment, in order to improve the shift feeling while preventing abnormal noise,
The configuration is as described above.

In the second embodiment, a retaining ring 10 for preventing the friction damper 5 from coming off in the axial direction is provided.
Are attached to the outer race 2. Therefore, outer ring 2
, One end side in the axial direction is extended.

Next, the operation of the second embodiment will be described.
Since the friction damper 5 is in a state in which relative rotation of a required angle with respect to the outer ring 2 of the rolling bearing A and the case 70 is allowed, the counter gear 75 is supported in a state in which the case 70 has a slight play in the rotational direction with respect to the case 70. Will be done. If the counter gear 75 has a slight play in the rotational direction, the main gear 72 or the low gear 73 that meshes with the counter gear 75 also has a small play in the rotational direction.
When the shifting key 74a of the synchromesh mechanism 74 meshes with the main gear 72 or the low gear 73 in accordance with the switching operation of the main gear 72,
Alternatively, the low gear 73 moves lightly for the play, so that the meshing operation can be performed smoothly. Thereby, the shift feeling of the synchromesh mechanism 74 of the transfer B is improved.

As described above, in the second embodiment, the switching operation of the synchromesh mechanism 74 can be performed smoothly by using the protruding piece 6c for preventing creep of the outer race 2.

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

(1) The shape of the friction damper 5 described in the above embodiment and the shape and number of the notches 3a provided in the elastic body 3 are not particularly limited. Also, a protruding piece 6 provided on the annular cored bar 6 of the friction damper 5.
The shape and number of c and the concave portions 70a of the case 70 are not particularly limited.

(2) In the above embodiment, an example is described in which the friction damper 5 is attached to the outer ring 2 of the rolling bearing A. However, the friction damper 5 is attached to the inner ring 1 of the rolling bearing A, and the elasticity of the friction damper 5 is increased. The body 7 may be brought into contact with the outer ring 2 or the case 70.

(3) The rolling bearing A with the friction damper 5 of the present invention is not limited to the one used for the transfer B of a four-wheel drive vehicle as shown in FIG. , And other devices.

[0046]

According to the first to fifth aspects of the present invention, a rolling bearing with a friction damper can be incorporated in a stable state in which no excessive force is applied between two inner and outer rings that require countermeasures for abnormal noise. In this way, it is possible to reliably prevent the trouble associated with the stable assembling, ie, the creep of the bearing ring, without using a separate component such as a key as in the related art.

In particular, when the protrusion of the friction damper is engaged with the concave portion of the one ring body with a required clearance in the circumferential direction, the friction damper and the one-way race ring are formed. And the one-ring body can be relatively rotated by a required angle, so that the one-ring body has a play in the rotation direction.

Further, the friction damper is loosely fitted to one of the races, and the projecting piece of the friction damper is engaged with the concave portion of the one ring with play. For example, the friction damper, the one orbital ring and the one ring can be relatively rotated by a required angle, whereby the one ring has play in the rotational direction.

Further, by attaching a retaining ring to one of the races in the construction of the fourth aspect, it is possible to prevent the friction damper from coming out of the one race in the axial direction.

Therefore, the rolling bearing with a friction damper of the present invention is used as a countermeasure against abnormal noise and shift feeling due to a gear collision in a transmission such as a transfer of a four-wheel drive vehicle or a manual transmission of a vehicle. When incorporated as a gear support bearing or the like, it is possible to mount the rolling bearing itself in a stable state without applying excessive force, and to provide a mounting structure that can reliably prevent creep of the race of the rolling bearing.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of a rolling bearing with a friction damper according to a first embodiment of the present invention.

FIG. 2 is a front view of the rolling bearing with a friction damper of FIG. 1;

FIG. 3 is a front view of a single friction damper in FIG. 1;

FIG. 4 is a longitudinal side view of a rolling bearing with a friction damper according to a second embodiment of the present invention.

FIG. 5 is a front view of the rolling bearing with friction dampers shown in FIG. 4;

FIG. 6 is a partial cross-sectional view showing a transfer of a general four-wheel drive vehicle.

[Explanation of symbols]

 A Rolling bearing 1 Inner ring 2 Outer ring 2a Concave groove of outer ring 5 Friction damper 6 Annular core bar of friction damper 6c Protrusion piece of annular core bar 7 Elastic body of friction damper 7a Notch of elastic body 70 Case 70a Recess of case

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Shibuya 39, Nishino, Kasagi, Azumi-cho, Itano-gun, Tokushima Prefecture Inside Hirohiro Chicago Rawhide Co., Ltd. Koyo Chicago Rawhide Co., Ltd.

Claims (5)

[Claims] 1. A mounting structure of a rolling bearing with a friction damper interposed between two inner and outer rings, wherein the rolling bearing has at least one of an inner ring and an outer ring, and one of the races The friction damper is attached to the one race in a loose fit state, and the friction damper is attached to the one race and is brought into contact with a race member that is paired with the one race, and the shaft is A part of a friction damper attached to the one bearing ring is attached in a state in which movement in a rotational direction is restrained with respect to the one ring. Mounting structure for rolling bearings with friction dampers. 2. A mounting structure for a rolling bearing with a friction damper interposed between two inner and outer rings, wherein the rolling bearing has at least one of an inner ring and an outer ring, and one of the races Are fitted loosely to the one ring body, and the friction damper is paired with the annular core bar attached to the one orbital ring and the one orbital ring attached to the annular cored bar. And an elastic body having a notch that allows oil to pass in the axial direction while being in contact with the bearing ring member, and that the annular cored bar has a recess provided on an end surface of the one-sided annular body. A mounting structure for a rolling bearing with a friction damper, characterized in that a projection piece is provided. 3. A mounting structure for a rolling bearing with a friction damper interposed between two inner and outer rings, wherein the rolling bearing has at least one of an inner ring and an outer ring. Is fitted loosely to the one ring body, and the friction damper is paired with the annular core bar attached to the one orbital ring and the one orbital ring attached to the annular cored bar. And an elastic body having a notch that allows oil to pass in the axial direction while being in contact with the bearing ring member, and that the annular cored bar has a recess provided on an end surface of the one-sided annular body. And a projecting piece engaged with a required clearance in the circumferential direction is provided, wherein the mounting structure for a rolling bearing with a friction damper is provided. 4. A mounting structure for a rolling bearing with a friction damper interposed between two inner and outer rings, wherein the rolling bearing has at least one of inner and outer races. The friction damper is loosely fitted to the one ring body, and the friction damper is attached to the one raceway ring in a loose fit state, and the annular core is attached to the annular core. On the other hand, an elastic body having a notch that is brought into contact with a raceway ring member that is paired with the raceway and that allows oil to pass in the axial direction, and an end face of the one raceway ring is provided on the annular cored bar. And a recessed portion provided with a required clearance in the circumferential direction is provided in both the concave groove provided in the groove and the concave portion provided in the end face of the one-ring body. free Mounting structure for a rolling bearing with a shock damper. 5. The mounting structure for a rolling bearing with a friction damper according to claim 4, wherein
A mounting structure for a rolling bearing, comprising a retaining ring for preventing the friction damper from coming off in the axial direction.