JP2002364657A - Shielding board for rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielding board for a rolling bearing, capable of preventing intrusion of foreign matters in both of the axial and radial directions of the rolling bearing. SOLUTION: An outer-periphery edge 223a of an external annular plate 223 covering the outer ring end of the rolling bearing is bent at roughly right angles to the outer ring side of the rolling bearing. A clearance formed in between the outer ring side of the rolling bearing and the external annular plate 223 is covered with the outer-periphery edge 223a of the external annular plate 223.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield plate for shielding an opening of a rolling bearing used as a bearing for supporting a pulley of an automobile engine, for example.

[0002]

2. Description of the Related Art Generally, in an automobile engine,
As shown in FIG. 9, a rolling bearing 12 such as a ball bearing is used as a bearing for supporting the pulley 11. The rolling bearing 12 includes an outer ring 13 having an outer surface fixed to the inner surface of the pulley 11, an inner ring 14 provided on the inner periphery of the outer ring 13, and a plurality of members provided between the inner ring 14 and the outer ring 13. Rolling element 1
5 and a retainer 16 for rotatably holding the rolling element 15, for example, a fixing member 18 via a bolt 17.
The inner diameter surface of the inner ring 14 is fixed to the outer diameter surface of the sleeve 19 supported by the pulley 11 to support the pulley 11.

[0003] Since the rolling bearing 12 has an opening between the outer ring 13 and the inner ring 14, foreign matters such as dust, ice blocks, and gravel may enter the inside of the bearing through the opening, causing a failure. There is. Therefore, in order to prevent such a problem, conventionally, Japanese Unexamined Patent Application Publication No. 11-10
As described in JP-A-1251, the shield plates 20 made of metal are provided at both ends of the rolling bearing 12 (see FIG. 9).
The shield plate 20 shields the opening of the rolling bearing 12 to prevent foreign matter from entering.

[0004]

However, in the above-described prior art, it is possible to prevent foreign matters from entering the rolling bearing 12 from the axial direction, but the shield plate 20 is located between the rolling bearing 12 and the outer ring 13. Since the gaps 21 are formed and attached, there is a problem that foreign substances from the radial direction (particularly, the outer radial direction) of the rolling bearing 12 cannot be prevented from entering.

The present invention has been made in view of such a problem, and provides a rolling bearing shield plate capable of preventing foreign matter from entering in both the axial and radial directions of the rolling bearing. The purpose is to:

[0006]

In order to achieve the above object, the present invention relates to a rolling bearing shield plate having an outer annular plate portion for covering an outer ring end surface of a rolling bearing, wherein the outer peripheral edge of the outer annular plate portion is provided. The part is bent to the outer ring side of the rolling bearing, and a gap formed between the outer ring end face and the outer annular plate portion is covered by an outer peripheral edge of the outer annular plate portion.

[0007] With this configuration, foreign matter from the axial direction of the rolling bearing is prevented from entering by the inner annular plate portion and the outer annular plate portion, and foreign material from the radial direction of the rolling bearing is prevented from entering the outer annular plate portion. Since the intrusion is prevented by the peripheral portion, the intrusion of foreign matter in both the axial direction and the radial direction of the rolling bearing can be prevented.

In this case, an annular wall portion extending in the outer radial direction of the rolling bearing is provided on the outer peripheral edge of the outer annular plate portion, for example, on the side surface of the pulley. Foreign matter such as ice blocks can be prevented from entering the formed annular concave portion. Further, by providing an annular inclined wall portion inclined toward the outer annular plate portion on the outer peripheral edge portion of the annular wall portion as in the invention according to claim 3, for example, in an annular concave portion formed on the side surface of the pulley. It is possible to prevent foreign substances such as ice blocks from entering, and to discharge foreign substances such as water adhered to the annular wall and the annular inclined wall from the inside of the annular recess of the pulley by centrifugal force.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those shown in FIG. 9 are denoted by the same reference numerals, and description of those parts will be omitted.
FIG. 1 is a cross-sectional view of a rolling bearing shield plate according to a first embodiment of the present invention. As shown in the figure, the shield plate 22 according to the first embodiment includes an inner annular plate portion 221 that covers an inner ring end surface of a rolling bearing, and a cylindrical portion is provided on an inner peripheral edge of the inner annular plate portion 221. 222 are integrally formed. The cylindrical portion 222 extends in the axial direction of the inner annular plate portion 221, and the outer diameter of the cylindrical portion 222 is formed slightly smaller than the inner diameter of the rolling bearing. Therefore, when the cylindrical portion 222 is fitted into the inner ring of the rolling bearing, the shield plate 22 is fixed to the inner ring of the rolling bearing.

[0010] The shield plate 22 has an outer annular plate portion 223 that covers the end surface of the outer ring of the rolling bearing. The outer annular plate portion 223 is connected to the inner annular plate portion 22.
1 and is formed on the outer periphery of the outer annular plate portion 223.
The outer peripheral edge portion 223a is bent substantially at right angles to the outer ring side of the rolling bearing. FIG. 2 is a cross-sectional view of a rolling bearing shield plate according to a second embodiment of the present invention. As shown in the figure, the shield plate 23 according to the second embodiment includes an inner annular plate portion 231 that covers the inner ring end surface of the rolling bearing, and a cylindrical portion is provided on the inner peripheral edge of the inner annular plate portion 231. 232 are integrally formed. The cylindrical portion 232 extends in the axial direction of the inner annular plate portion 231, and the outer diameter of the cylindrical portion 232 is formed slightly smaller than the inner diameter of the rolling bearing.

The shield plate 23 has an outer annular plate portion 233 for covering the end surface of the outer ring of the rolling bearing. The outer annular plate portion 233 is connected to the inner annular plate portion 23.
1 and is formed on the outer periphery of the outer annular plate portion 233.
The outer peripheral portion 233a of the rolling bearing is bent at a substantially right angle to the outer ring side of the rolling bearing. When the above-described shield plates 22 and 23 are attached to the rolling bearing, as shown in FIG. 3, a gap 21 formed between the end surface of the outer ring 13 and the outer annular plate portions 223 and 233 is formed. 2
33 are covered by outer peripheral edges 223a and 233a.
As a result, foreign substances from the axial direction of the rolling bearing 12 are removed from the inner annular plate portions 221 and 231 of the shield plates 22 and 23.
And the outer annular plate portions 223 and 233 are prevented from entering, and foreign matters from the radial direction of the rolling bearing 12 are prevented from entering the outer peripheral edge portions 223 a and 223 a of the outer annular plate portions 223 and 233.
233a prevents entry, so the rolling bearing 1
The foreign matter can be prevented from entering in both the axial direction and the radial direction.

FIG. 4 shows a sectional view of a rolling bearing shield plate according to a third embodiment of the present invention. As shown in the figure, the shield plate 24 according to the third embodiment has an inner annular plate portion 241 that covers the inner ring end surface of the rolling bearing.
A cylindrical portion 242 is formed integrally with the inner peripheral edge of the inner annular plate portion 241. The cylindrical portion 242 extends in the axial direction of the inner annular plate portion 241, and the outer diameter of the cylindrical portion 242 is formed slightly smaller than the inner diameter of the rolling bearing.

The shield plate 24 has an outer annular plate portion 243 for covering the outer ring end surface of the rolling bearing. This outer annular plate portion 243 is
1 and is formed on the outer periphery of the outer annular plate portion 243.
The outer peripheral edge 243a is bent at a substantially right angle to the outer ring side of the rolling bearing. Further, the shield plate 24 has an annular wall portion 244 extending in the outer diameter direction of the rolling bearing,
The annular wall 244 is formed on the outer peripheral edge 243 a of the outer annular plate 243.

When such a shield plate 24 is mounted on a rolling bearing, as shown in FIG. 5, a gap 2 formed between the end surface of the outer race 13 and the outer annular plate portion 243 is formed.
1 is covered by the outer peripheral edge 243a of the outer annular plate portion 243. As a result, foreign matter from the axial direction of the rolling bearing 12 is prevented from entering by the inner annular plate portion 241 and the outer annular plate portion 243, and the rolling bearing 1
Since the foreign matter from the radial direction 2 is prevented from entering by the outer peripheral edge 243a of the outer annular plate portion 243, the foreign matter can be prevented from entering in both the axial direction and the radial direction of the rolling bearing 12.

In the present embodiment, the annular wall portion 244 extending in the outer diameter direction of the rolling bearing is formed by the outer annular plate portion 24.
The annular wall portion 244 prevents the foreign matter such as ice blocks from entering the annular concave portion 11a formed on the side surface of the pulley 11, since the annular wall portion 244 is provided on the outer peripheral edge portion 243a.
FIG. 6 is a sectional view of a rolling bearing shield plate according to a fourth embodiment of the present invention. As shown in the figure, a shield plate 25 according to the fourth embodiment includes an inner annular plate portion 251 that covers an inner ring end surface of a rolling bearing, and a cylindrical portion is provided on an inner peripheral edge of the inner annular plate portion 251. 252 are integrally formed. The cylindrical portion 252 extends in the axial direction of the inner annular plate portion 251, and the outer diameter of the cylindrical portion 252 is formed slightly smaller than the inner diameter of the rolling bearing.

The shield plate 25 has an outer annular plate portion 253 for covering the outer ring end surface of the rolling bearing. The outer annular plate portion 253 is connected to the inner annular plate portion 25.
1 and is formed on the outer periphery of the outer annular plate portion 253.
The outer peripheral edge portion 253a is bent at a substantially right angle to the outer ring side of the rolling bearing. The shield plate 25 has an annular wall portion 254 extending from the outer peripheral edge portion 253a of the outer annular plate portion 253 in the outer radial direction of the rolling bearing. Part 253
An annular inclined wall portion 255 inclined to the side is provided.

When such a shield plate 25 is mounted on a rolling bearing, as shown in FIG. 7, a gap 21 formed between the end face of the outer race 13 and the outer annular plate portion 253 is formed outside the outer annular plate portion 253. It is covered by the peripheral portion 253a. Thus, foreign matter from the axial direction of the rolling bearing 12 is prevented from entering by the inner annular plate portion 251 and the outer annular plate portion 253, and foreign matter from the radial direction of the rolling bearing 12 is prevented from the outer peripheral edge 253 a of the outer annular plate portion 253. As a result, intrusion of foreign matter can be prevented in both the axial direction and the radial direction of the rolling bearing 12.

Further, in the present embodiment, the annular inclined wall portion 255 inclined toward the outer annular plate portion 253 is
4, the foreign matter such as ice blocks can be prevented from entering the annular concave portion 11a of the pulley 11, and the foreign matter such as water adhering to the annular wall portion 254 and the annular inclined wall portion 255 can be prevented. It can be discharged from the inside of the annular concave portion 11a of the pulley 11 to the outside by the centrifugal force.

In the above-described first to fourth embodiments, the outer peripheral edge of the outer annular plate portion is bent at a substantially right angle to the outer ring side of the rolling bearing. However, as in the fifth embodiment shown in FIG. The same effect can be obtained by bending the outer peripheral edge 243a of the annular plate portion 243 obliquely.

[0020]

As described above, according to the rolling bearing shield plate of the present invention, the gap formed between the outer ring end face of the rolling bearing and the outer annular plate portion has the outer peripheral edge of the outer annular plate portion. Since it is covered by the portion, it is possible to prevent foreign matter from entering in both the axial direction and the radial direction of the rolling bearing.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rolling bearing shield plate according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a rolling bearing shield plate according to a second embodiment of the present invention.

FIG. 3 is a diagram for explaining the function and effect of the shield plate shown in FIGS. 1 and 2;

FIG. 4 is a sectional view of a rolling bearing shield plate according to a third embodiment of the present invention.

FIG. 5 is a diagram for explaining the function and effect of the shield plate shown in FIG. 4;

FIG. 6 is a cross-sectional view of a rolling bearing shield plate according to a fourth embodiment of the present invention.

FIG. 7 is a diagram for explaining the function and effect of the shield plate shown in FIG. 6;

FIG. 8 is a view showing a rolling bearing shield plate according to a fifth embodiment of the present invention.

FIG. 9 is a view showing a conventional rolling bearing shield plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Pulley 12 Rolling bearing 13 Outer ring 14 Inner ring 15 Rolling element 16 Cage 21 Gap 22 Shield plate 221 Inner annular plate part 222 Cylindrical part 223 Outer annular plate part 223a Outer peripheral edge part 23 Shield plate 231 Inner annular plate part 232 Cylindrical part 233 Outside Annular plate portion 233a Outer peripheral edge portion 24 Shield plate 241 Inner annular plate portion 242 Cylindrical portion 243 Outer annular plate portion 243a Outer peripheral edge portion 244 Annular wall portion 25 Shield plate 251 Inner annular plate portion 252 Cylindrical portion 253 Outer annular plate portion 253a Outer peripheral edge Part 254 annular wall part 255 annular inclined wall part

Claims (3)

[Claims] 1. A rolling bearing shield plate having an outer annular plate portion covering an outer ring end surface of a rolling bearing, wherein an outer peripheral edge portion of the outer annular plate portion is bent toward an outer ring side of the rolling bearing to form an outer ring end surface. A gap formed between the outer annular plate portion and the outer annular plate portion is covered by an outer peripheral edge of the outer annular plate portion. 2. The shield plate for a rolling bearing according to claim 1, wherein an annular wall portion extending in an outer radial direction of the rolling bearing is provided on an outer peripheral edge of the outer annular plate portion. 3. The shield plate for a rolling bearing according to claim 2, wherein an annular inclined wall portion inclined toward the outer annular plate portion is provided on an outer peripheral edge of the annular wall portion.