JP2002089564A - Oil-impregnated bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-impregnated bearing device capable of preventing scattering of lubricating oil from an oil-impregnated bearing to the outside. SOLUTION: The oil-impregnate bearing device 9 includes the oil-retaining bearing 10 non-rotatably held against a housing cover and rotatably supporting a rotating shaft 6 which rotates relative to the housing cover, and an axial support member 11 disposed at the upper end of the oil-retaining bearing 10 for supporting the rotating shaft 6 to regulate the movement of the rotating shaft 6 toward its lower end. The axial support member 11 includes a non- rotating washer 13 made to non-rotatably abut against the upper surface 10c of the bearing 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-impregnated bearing device for supporting a rotary shaft such as a motor.

[0002]

2. Description of the Related Art As a conventional oil-impregnated bearing device, as shown in FIGS. 8 and 9, an oil-impregnated bearing 52 rotatably supporting a rotary shaft 51 such as a motor, and one end of the oil-impregnated bearing 52 in the axial direction are arranged. And an axial support member 53 for supporting the rotating shaft 51 so as to restrict the movement of the rotating shaft 51 to the other end in the axial direction.

The oil-impregnated bearing 52 is a porous sintered alloy having a large number of holes, is formed in a substantially cylindrical shape, and each hole is filled with lubricating oil. The oil-impregnated bearing 52 is fixed to a motor case (not shown) or the like, and the rotation shaft 51 is inserted into a center hole thereof.

[0004] An axial support member 53 is provided with two E-rings 54 fixed to the rotating shaft 51 and two E-rings that are inserted between the rotating shaft 51 and the oil-bearing bearing 52. Resin washers 55 and 56, rubber washers 57, and metal washers 58 are provided. The washers 55 to 58 are laminated in the order of the resin washer 55, the rubber washer 57, the resin washer 56, and the metal washer 58 from the oil-impregnated bearing 52 side. Resin washer 55,
56, the inner diameter of the rubber washer 57 is set to be substantially the same as the outer diameter of the rotating shaft 51, and the inner diameter of the metal washer 58 is
1 is set larger than the outside diameter. The outer diameters of the rubber washer 57 and the metal washer 58 are the same as those of the resin washer 5.
It is set larger than the outer diameter of 5,56. The rubber washer 57 absorbs backlash in the axial direction.

In such an oil-impregnated bearing device, the oil-impregnated bearing 5
2, the rotation shaft 51 is rotatably supported,
The axial direction support member 53 restricts the movement of the rotating shaft 51 in the axial direction.

[0006]

In the above oil-impregnated bearing device, while the rotating shaft 51 is rotating, lubricating oil flows between the oil-impregnated bearing 52 and the resin washer 55 from the oil-impregnated bearing 52 due to sliding heat or the like. put out. Then, the resin washer 55
Is rotatable together with the other washers 56 to 58, and easily rotates together with the rotating shaft 51 due to frictional force. Therefore, the lubricating oil discharged from the outer peripheral side of the resin washer 55 to the outer peripheral side of the rubber washer 57 by centrifugal force. There is a problem that they move and further scatter outside.

The lubricating oil discharged from the oil-impregnated bearing 52 is:
The rotating shaft 51 and the resin washers 55 and 56 are formed by capillary action.
And a metal washer 58 between the rubber washer 57 and the inner periphery thereof.
Move to the side. Then, there is a problem that the lubricating oil moves to the outer peripheral side of the metal washer 58 due to the centrifugal force and further scatters outside. These factors cause deterioration of durability, such as rapid consumption of lubricating oil and seizure of the oil-impregnated bearing 52 in a short period of time. or,
The scattered lubricating oil causes various troubles such as causing clogging of the contaminant by adhering to the commutator of the motor and abnormal wear of the brush sliding on the commutator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an oil-impregnated bearing device capable of preventing the lubricating oil from scattering from the oil-impregnated bearing to the outside. is there.

[0009]

According to a first aspect of the present invention, there is provided an oil-impregnated bearing which is rotatably supported by a non-rotating body and rotatably supports a rotating shaft which rotates with respect to the non-rotating body. An oil-implemented bearing device, comprising: an axial support member disposed at one axial end of a bearing and supporting the rotary shaft to restrict movement of the rotary shaft to the other axial end. The member includes a non-rotating washer that is non-rotatably abutted on one axial end surface of the oil-impregnated bearing.

According to a second aspect of the present invention, in the oil-impregnated bearing device according to the first aspect, an engagement concave portion or an engagement convex portion is formed at an end of the oil-impregnated bearing on the non-rotating washer side. The non-rotating washer is formed by forming an engagement protrusion or an engagement recess at an end of the rotary washer on the oil-impregnated bearing side, and engaging the engagement protrusion with the engagement recess in the rotation direction. The bearing cannot rotate with respect to the bearing.

According to a third aspect of the present invention, in the oil-impregnated bearing device according to the first aspect, at least one of the abutting surfaces of the oil-impregnated bearing and the non-rotating washer is subjected to surface non-slip processing, whereby The non-rotating washer was made non-rotatable with respect to the oil-impregnated bearing.

The invention described in claim 4 is the first to third aspects of the present invention.
In the oil-impregnated bearing device according to any one of the above, the inner diameter of the oil-impregnated bearing side end of the non-rotating washer is formed to be larger than the outer diameter of the rotating shaft, and the non-rotating washer has It was arranged so as to be separated from the rotation axis.

[0013] The invention according to claim 5 is the invention according to claims 1 to 4.
In the oil-impregnated bearing device according to any one of the above, an outer diameter of the oil-impregnated bearing side end of the non-rotating washer is formed to be larger than an outer diameter of the non-rotating washer-side end of the oil-impregnated bearing.

(Operation) According to the first aspect of the present invention,
Even if lubricating oil flows out of the oil bearing while the rotating shaft is rotating,
Since the non-rotating washer that is in contact with one end surface in the axial direction of the oil-impregnated bearing is not rotatable and does not rotate with the rotating shaft, the lubricating oil is not scattered by receiving centrifugal force as in the related art.

According to the second aspect of the present invention, the non-rotating washer-side end of the oil-impregnated bearing is formed with an engagement concave portion or an engagement projection, and the non-rotating washer has an oil-impregnated bearing-side end. Is formed with an engagement projection or an engagement recess. And
The non-rotating washer is reliably prevented from rotating with respect to the oil-impregnated bearing by engaging the engaging projection with the engaging recess in the rotational direction.

According to the third aspect of the present invention, at least one of the contact surfaces of the oil-impregnated bearing and the non-rotating washer is subjected to surface non-slip processing, so that the non-rotating washer cannot rotate with respect to the oil-impregnated bearing. It is said.

According to the fourth aspect of the present invention, the inner diameter of the non-rotating washer on the oil-impregnated bearing side is formed to be larger than the outer diameter of the rotating shaft. It is arranged so as to be separated from the rotation axis. Therefore, the lubricating oil that has flowed out is prevented from entering between the rotating shaft and the inner circumference of the non-rotating washer due to capillary action, and the lubricating oil moves to the side of the non-rotating washer where the oil bearing is not disposed. Is prevented.

According to the invention described in claim 5, the outer diameter of the non-rotating washer on the oil-impregnated bearing side is larger than the outer diameter of the oil-impregnated bearing on the non-rotating washer side. Therefore, the lubricating oil that has flowed out can be held at the non-rotating washer-side end of the outer periphery of the oil-impregnated bearing.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a motor for a vehicle blower will be described below with reference to FIGS. As shown in FIG. 1, the motor 1 includes a substantially bottomed cylindrical yoke housing 2 and a housing cover 3 as a non-rotating body fixed so as to close an opening of the yoke housing 2.

A plurality of magnets 4 are fixed to the inner peripheral surface of the yoke housing 2 in the circumferential direction. An oil-impregnated bearing 5 is fixed to the bottom of the yoke housing 2, and the base end of the rotating shaft 6 is rotatably supported by the oil-impregnated bearing 5. An armature 7 is fixed to an intermediate portion of the rotating shaft 6 so as to face the magnet 4, and a commutator 8 is fixed to a tip end of the armature 7. The tip of the rotating shaft 6 is rotatably supported by an oil-impregnated bearing device 9 disposed on the housing cover 3 so that the tip projects outside. A blower fan (not shown) is fixed to the tip of the rotating shaft 6. The motor 1 is fixed to a vehicle (not shown) so that the rotating shaft 6 is vertical.

As shown in FIGS. 2 and 3, the oil-impregnated bearing device 9 includes an oil-impregnated bearing 10 that rotatably supports the rotating shaft 6.
And an axial support member 11 disposed at one axial end (upper side) of the oil-impregnated bearing 10 and supporting the rotary shaft 6 to restrict movement of the rotary shaft 6 to the other axial end (lower side). And

The oil-impregnated bearing 10 is a porous sintered alloy having a large number of holes, and each hole is filled with lubricating oil. The oil-impregnated bearing 10 is formed in a substantially cylindrical shape having the largest outer diameter at the center in the axial direction. In addition, a tapered surface 10a whose diameter gradually increases toward the lower side is formed below the inner peripheral surface of the oil-impregnated bearing 10. Further, an engagement concave portion 10b is formed in a part of the upper end portion of the oil-impregnated bearing 10 on the outer peripheral side. In the present embodiment, three engaging recesses 10b are formed at equal angle (120 °) intervals. On the other hand, as shown in FIG. 1, a substantially cylindrical tubular portion 3a is provided upright at the upper center of the housing cover 3, and an oil-impregnated bearing 10 is provided at the upper central portion of the housing cover 3 surrounded by the tubular portion 3a.
An accommodation recess 3b corresponding to the lower part of the housing is provided. The oil-impregnated bearing 10 has an annular fixing member 1 whose lower part is housed in the housing recess 3b and whose upper part is fitted inside the cylindrical part 3a.
2 and is fixed to the housing cover 3. The rotating shaft 6 is inserted through the oil-impregnated bearing 10.

As shown in FIGS. 2 and 3, the axial support member 11 includes a non-rotating washer 13, a rotating washer 14 as an intermediate washer, and an E-ring 1 as a rotating member.
5 is provided.

The non-rotating washer 13 is made of metal. The inner diameter of the non-rotating washer 13 is set to be larger than the outer diameter of the rotating shaft 6 (the inner diameter of the upper end of the oil-impregnated bearing 6). The outer diameter of the non-rotating washer 13 is set larger than the outer diameter of the upper end of the oil-impregnated bearing 10. At the lower end of the non-rotating washer 13, an engaging projection 13a is formed. In the present embodiment, three engaging projections 13a are formed at equal angle (120 °) intervals corresponding to the engaging recesses 10b. The upper surface 13b of the non-rotating washer 13 is provided with a fluororesin coating as a non-lubricating oil-slidable surface sliding process.

The rotary washer 14 is made of metal. The inner and outer diameters of the rotating washer 14 are set to be the same as the inner and outer diameters of the non-rotating washer 13. Then, in a state where the non-rotating washer 13 and the rotating washer 14 are laminated on the upper surface 10c of the oil-impregnated bearing 10 in this order, the E-ring 15 and the oil-impregnated bearing 10 sandwich the non-rotating washer 13 and the rotating washer 14 therebetween. Is fitted to the rotating shaft 6. In addition, E
The ring 15 is of a known type, and is fitted into a groove (not shown) formed in the rotating shaft 6 so as to be immovable in the axial direction.

Here, the non-rotating washer 13 is laminated on the upper surface 10c of the oil-impregnated bearing 10 so that the engagement projection 13a fits into the engagement recess 10b.
By engaging with 0b in the rotational direction, the oil-impregnated bearing 10 cannot be rotated. The non-rotating washer 13
The inner peripheral surface is arranged so as to be separated from the outer peripheral surface of the rotating shaft 6 by a predetermined distance or more. The predetermined interval is an interval at which the lubricating oil does not enter the gap due to capillary action, and the inner diameter of the non-rotating washer 13 is set so as to obtain this interval. The rotating washer 14 is rotatable with respect to the non-rotating washer 13.

A cover 16 is fixed to the opening of the cylindrical portion 3a of the housing cover 3 so that only the tip of the rotating shaft 6 projects outside. In the motor 1 configured as described above, the rotating shaft 6 is rotatably supported by the oil-impregnated bearing 10, and is axially supported by the axial support member 11 (the non-rotating washer 13, the rotating washer 14, and the E-ring 15). It is supported so that downward movement is regulated.

Next, the characteristic operation and effect of the above embodiment will be described below. (1) The non-rotating washer 13 that is in contact with the upper surface 10c of the oil-impregnated bearing 10 cannot rotate with respect to the oil-impregnated bearing 10 because the engaging projection 13a is engaged with the engaging recess 10b in the rotational direction. ing. Therefore, even if the lubricating oil flows out of the oil-impregnated bearing 10 due to the sliding heat between the rotary shaft 6 and the oil-impregnated bearing 10 during the rotation of the rotary shaft 6, the lubricating oil is scattered by the centrifugal force as in the related art. Nothing to do. As a result, the decrease in the amount of lubricating oil contained in the oil-impregnated bearing 10 is reduced, and the life of the oil-impregnated bearing device 9 (oil-impregnated bearing 10) is prolonged, and the life of the motor 1 is prolonged. Further, in the motor 1 provided with the oil-impregnated bearing device 9, since the lubricating oil does not scatter (leakage hardly occurs), for example, the lubricating oil adheres to the commutator 8 to cause clogging of the contaminant or abnormal wear of the brush. And the like are prevented.

(2) The non-rotating washer 13 abutting on the upper surface 10c of the oil-impregnated bearing 10 has its engaging projection 13a engaged with the engaging recess 10b of the oil-impregnated bearing 10 in the rotational direction.
The rotation with respect to the oil-impregnated bearing 10 is reliably disabled.

(3) The non-rotating washer 13 is set so that its inner diameter is larger than the outer diameter of the rotating shaft 6, and its inner peripheral surface is separated from the outer peripheral surface of the rotating shaft 6 by a predetermined distance or more. Therefore, the lubricating oil that has flowed out is prevented from entering between the rotating shaft 6 and the inner periphery of the non-rotating washer 13 due to capillary action, and the lubricating oil is located above the non-rotating washer 13 (the rotating washer 14 and the E-ring 15). Side) is prevented. Thereby, the rotating shaft 6 and the E-ring 1
Even if the rotary washer 14 rotates together with 5, the lubricating oil is prevented from being scattered due to centrifugal force based on the rotation.

(4) The outer diameter of the non-rotating washer 13 is set to be larger than the outer diameter of the upper end of the oil-impregnated bearing 10. Therefore, as shown in FIG. 2, the lubricating oil J that has flowed out can be held at the end of the oil-impregnated bearing 10 on the non-rotating washer 13 side. The lubricating oil J is recovered again in the oil-impregnated bearing 10 when the temperature of the oil-impregnated bearing 10 decreases. Therefore,
The decrease in the amount of lubricating oil contained in the oil-impregnated bearing 10 is reduced.

(5) The upper surface 13b of the non-rotating washer 13 is provided with a fluororesin coating as a non-lubricating oil-slidable surface sliding process. Therefore, the rotating washer 14 slides and rotates easily with respect to the non-rotating washer 13, that is, the rotating washer 14 easily rotates together with the rotating shaft 6 and the E-ring 15, and the load on the rotation of the rotating shaft 6 is reduced.

(6) Below the inner peripheral surface of the oil-impregnated bearing 10,
Since the tapered surface 10a whose diameter increases slightly toward the lower side is formed, dripping of the lubricating oil downward is reduced. The above embodiment may be modified as follows.

In the above embodiment, three engaging concave portions 10b and three engaging convex portions 13a are formed at equal angular (120 °) intervals. However, the intervals and the numbers thereof may be changed as appropriate.
Even in this case, the same effect as that of the above embodiment can be obtained.

In the above embodiment, the engagement recess 10b is formed in the oil-impregnated bearing 10, the engagement protrusion 13a is formed in the non-rotating washer 13, and the engagement protrusion 13a is rotated with the engagement recess 10b in the rotation direction. Although the non-rotating washer 13 is prevented from rotating with respect to the oil-impregnated bearing 10 by being engaged, if the non-rotating washer 13 abutting on the upper surface 10c of the oil-impregnated bearing 10 can be prevented from rotating, change to another structure. Is also good. For example, conversely, the non-rotating washer is formed on the non-rotating washer side, the engaging convex portion is formed on the oil-impregnated bearing side, and the non-rotating washer is engaged with the engaging concave portion in the rotating direction. The rotation may not be possible with respect to the oil-impregnated bearing. Even in this case, the same effect as in the above embodiment can be obtained.

The oil-impregnated bearing 10 and the non-rotating washer 13 of the above embodiment may be changed to the oil-impregnated bearing 21 and the non-rotating washer 22 shown in FIGS. The oil-impregnated bearing 21
It differs from the oil-impregnated bearing 10 only in that the engagement recess 10b is not formed. The non-rotating washer 22 is not formed with the engaging projection 13a as compared with the non-rotating washer 13, and the lower surface 22a of the non-rotating washer 13 is provided with a non-slip surface (for example,
(Knurling). Even in this case, the non-rotating washer 22 cannot rotate with respect to the oil-impregnated bearing 21. Further, instead of performing surface non-slip processing on the lower surface 22a of the non-rotating washer 22, the lower surface 22a and the oil-impregnated bearing 21 may be bonded with an adhesive.
Even in this case, the non-rotating washer 22 is
Cannot rotate.

In the above embodiment, the non-rotating washer 1
The upper surface 13b of No. 3 was subjected to a fluororesin coating with lubricating oil and high slidability. However, as shown in FIG. 6 and FIG.
A configuration in which a resin washer 31 made of non-lubricating oil and highly slidable resin is provided as an intermediate washer between the non-rotating washer 13 and the rotating washer 14 may be used. Also,
At least one of the non-rotating washer 13 and the rotating washer 14 may be changed to a non-lubricating oil and a resin material having high slidability. Even in this case, the load on the rotation of the rotating shaft 6 is reduced.

The non-rotating washer 13 of the above embodiment
The intermediate washer (rotary washer 14) disposed between the rotary washer 14 and the E-ring 15 may be a washer other than the rotary washer 14 or a plurality of washers. For example, a rubber washer may be additionally provided between the rotary washer 14 and the E-ring 15 so as to be able to expand and contract in the axial direction. In this case, the backlash in the axial direction is absorbed by the rubber washer.

The non-rotating washer 13 of the above embodiment
The intermediate washer (rotary washer 14) provided between the E-ring 15 and the E-ring 15 may be omitted. That is, the E-ring 15 may be configured to directly contact the upper surface 13b of the non-rotating washer 13. In this case, the number of parts is reduced as compared with the above embodiment.

The rotating member (E ring 1) of the above embodiment
5) may be any as long as it extends radially outward of the rotating shaft 6 and cannot rotate in the axial direction with respect to the rotating shaft 6 and rotates integrally therewith. For example, E-ring 15
May be changed to a radially outwardly extending flange portion integrally formed with the rotating shaft 6.

In the above embodiment, the tapered surface 10a whose diameter gradually increases downward is formed below the inner peripheral surface of the oil-impregnated bearing 10, but the tapered surface 10a is not formed, that is, the inner diameter is reduced. The bearing may be changed to an oil-impregnated bearing that is uniform in the axial direction. Even in this case, effects similar to the effects (1) to (5) of the above embodiment can be obtained.

In the above embodiment, the oil-impregnated bearing device 9 is provided in the motor 1, but the oil-impregnated bearing device 9 may be provided in another device other than the motor. The technical ideas other than those described in the claims that can be grasped from the above embodiment will be described below together with their effects.

(A) The oil-impregnated bearing device according to claim 3, wherein the surface slip prevention is knurling. This way,
Since the knurling process is performed on at least one contact surface of the oil-impregnated bearing and the non-rotating washer, the non-rotating washer cannot be rotated with respect to the oil-impregnated bearing.

(B) In the oil-impregnated bearing device according to any one of claims 1 to 5, the axial-direction support member comprises:
One or more intermediate washers disposed at one axial end of the non-rotating washer, and are provided so as to extend radially outward of the rotating shaft and to rotate integrally with the rotating shaft without being movable in the axial direction. A rotating member provided at one axial end of the intermediate washer. In this case, the rotating shaft is constituted by a rotating member which is not movable in the axial direction and rotates integrally with the rotating shaft, an intermediate washer, and a non-rotating washer abutted non-rotatably on one axial end surface of the oil-impregnated bearing. The movement to the other end in the direction is restricted.

(C) In the oil-impregnated bearing device described in (B) above, the intermediate washer is provided with a rotary washer rotatably abutting on one axial end surface of the non-rotating washer. Oil-impregnated bearing device. With this configuration, the rotating shaft is a rotating member that cannot move in the axial direction and rotates integrally with the rotating shaft, a rotating washer rotatably abutted on one axial end surface of the non-rotating washer, and an axial direction of the oil-impregnated bearing. The movement to the other end in the axial direction is restricted by the non-rotating washer abutted non-rotatably on one end surface.

(D) In the oil-impregnated bearing device described in (c) above, the non-rotating washer and the rotating washer are made of metal, and the rotating washer-side end face of the non-rotating washer and the rotating washer An oil-impregnated bearing device, characterized in that at least one of the end faces on the non-rotating washer side is subjected to a surface sliding process with lubricating oil and high slidability. This makes it easier for the rotating washer to slide and rotate with respect to the non-rotating washer, thereby reducing the load on the rotation of the rotating shaft.

(E) The oil-impregnated bearing device according to (D), wherein the surface slipping is a fluororesin coating. This makes it easier for the rotating washer to slide and rotate with respect to the non-rotating washer, thereby reducing the load on the rotation of the rotating shaft.

(F) The oil-impregnated bearing device according to (c), wherein at least one of the non-rotating washer and the rotating washer is a resin rotating washer made of resin. By doing so, the rotating washer slides and rotates easily with respect to the non-rotating washer,
The load on the rotation of the rotating shaft is reduced.

(G) The oil-impregnated bearing device according to any one of (c) to (f), wherein the intermediate washer is provided with a rubber washer that can expand and contract in the axial direction. In this case, the backlash in the axial direction is absorbed by the rubber washer.

(H) In the oil-impregnated bearing device according to any one of claims 1 to 5, the axial support member is
A rotating member is provided so as to extend radially outward of the rotating shaft, to be integrally movable with the rotating shaft so as to be immovable in the axial direction, and to be in contact with one axial end surface of the non-rotating washer. Oil-impregnated bearing device. In this case, the rotating shaft is axially non-movable in the axial direction and integrally rotates with the rotating member, and the non-rotating washer abuts non-rotatably on one axial end surface of the oil-impregnated bearing. Movement to is regulated.

(I) The oil-impregnated bearing device according to any one of (b) to (h), wherein the rotating member is an E-ring fitted to a rotating shaft. With this configuration, it is possible to provide a rotating member that extends outward in the radial direction of the rotating shaft, is immovable in the axial direction and integrally rotates with the rotating shaft only by fitting the E-ring to the rotating shaft.

(N) Claims 1 to 5 and (A) to (A)
A motor provided with the oil-impregnated bearing device according to any one of (i) to (f). By doing so, the durability of the oil-impregnated bearing device is improved, so that the durability of the motor is improved.

(V) The motor described in (v) above is a motor arranged such that the rotating shaft is vertical, and the axial support member regulates the downward movement of the rotating shaft. A motor characterized in that: By doing so, the durability of the oil-impregnated bearing device is improved, so that the durability of the motor is improved.

(ヲ) The motor according to (1) above, wherein a tapered surface is formed below the inner peripheral surface of the oil-impregnated bearing, the diameter of the tapered surface increasing downward.
By doing so, it is possible to reduce lubrication oil dripping downward.

[0055]

As described in detail above, according to the present invention,
An oil-impregnated bearing device capable of preventing the lubricating oil from scattering from the oil-impregnated bearing to the outside can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a motor according to an embodiment.

FIG. 2 is a sectional view of a main part of the oil-impregnated bearing device according to the embodiment.

FIG. 3 is an exploded view of the oil-impregnated bearing device according to the embodiment.

FIG. 4 is a cross-sectional view of a main part of an oil-impregnated bearing device according to another example.

FIG. 5 is an exploded view of an oil-impregnated bearing device in another example.

FIG. 6 is a sectional view of a main part of an oil-impregnated bearing device in another example.

FIG. 7 is an exploded view of an oil-impregnated bearing device in another example.

FIG. 8 is a sectional view of a main part of an oil-impregnated bearing device according to a conventional technique.

FIG. 9 is an exploded view of an oil-impregnated bearing device according to the related art.

[Explanation of symbols]

3 ... housing cover (non-rotating body), 6 ... rotating shaft, 1
0, 21 ... oil-impregnated bearing, 11 ... axial direction support member, 13,
22: non-rotating washer, 10b: engaging concave portion, 13a: engaging convex portion, 22a: lower surface (contact surface) of the non-rotating washer.

Claims (5)

[Claims] 1. A non-rotating body (3) which is non-rotatably held,
An oil-impregnated bearing (10, 21) rotatably supporting a rotating shaft (6) that rotates with respect to the non-rotating body (3); an oil-impregnated bearing (10, 21) disposed at one axial end of the oil-impregnated bearing (10, 21); An axial support member (1) for supporting the rotating shaft (6) to restrict the movement of the rotating shaft (6) to the other end in the axial direction.
In the oil-impregnated bearing device provided with (1), the axial support member (11) is provided with the oil-impregnated bearing (1).
An oil-impregnated bearing device comprising a non-rotating washer (13, 22) non-rotatably abutting on one end surface (10c) in the axial direction of (0, 21). 2. The oil-impregnated bearing device according to claim 1, wherein an engagement recess (10b) or an engagement protrusion is formed at an end of the oil-impregnated bearing (10) on the side of the non-rotating washer (13). An engagement protrusion (13a) or an engagement recess is formed at an end of the non-rotating washer (13) on the oil-impregnated bearing (10) side, and the engagement protrusion (13a) is connected to the engagement recess (10b). The non-rotating washer (1)
An oil-impregnated bearing device characterized in that 3) cannot rotate with respect to the oil-impregnated bearing (10). 3. The oil-impregnated bearing device according to claim 1, wherein the oil-impregnated bearing (21) and the non-rotating washer (22).
An oil-impregnated bearing device characterized in that the non-rotating washer (22) is made unrotatable with respect to the oil-impregnated bearing (21) by subjecting at least one of the contact surfaces (22a) to a surface slipping process. . 4. The oil-impregnated bearing (1) of the non-rotating washer (13, 22) according to any one of claims 1 to 3,
The inner diameter of the 0,21) side end is formed larger than the outer diameter of the rotating shaft (6), and the non-rotating washers (13, 22) are
An oil-impregnated bearing device, wherein an inner peripheral surface of the oil-impregnated bearing device is arranged so as to be separated from the rotating shaft (6). 5. The oil-impregnated bearing device according to claim 1, wherein the oil-impregnated bearing (1) of the non-rotating washer (13, 22) is provided.
The outer diameter of the end portion on the (0, 21) side is adjusted to the oil-impregnated bearing (10, 2).
An oil-impregnated bearing device characterized in that it is formed larger than the outer diameter of the non-rotating washer (13, 22) side end of 1).