JP2008256167A - Bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device having improved productivity with higher assembling work efficiency. <P>SOLUTION: The bearing device 10 comprises: a rolling bearing 11 having a locking groove 19 formed in the outer periphery of an outer ring 13; and a fixed plate 12 fitted to the outer periphery of the outer ring 13 and having locked protrusions 21a, 21b on the inner periphery, to be locked to the locking groove 19 when fitted. The fixed plate 12 has: plate pieces 12a, 12b split into two in the circumferential direction; a fitting portion 22 formed at the split end of the plate piece 12a; and a fitted portion 23 formed in the split end of the plate piece 12b to connect the plate pieces 12a, 12b to each other with the fitting portion 22 of the plate piece 12a fitted thereto in the axial direction. On the inner periphery of the plate piece 12a, the locked protrusion 21a is formed almost all over the length. The plate piece 12b has the locked protrusion 21b formed on a portion excluding both circumferential ends of the inner periphery, and it is elastically deformed at its split end in the axial direction in the state where the locked protrusion 21b is locked to the locking groove 19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bearing device used for a rotation support part such as a gear in a transmission, for example.

  As a conventional bearing device of this type, for example, as shown in FIG. 12, a rolling bearing 4 in which a plurality of rolling elements 3 are disposed between an inner ring 1 and an outer ring 2, and an outer ring 2 of the rolling bearing 4. And a fixed plate 5 that fixes the rolling bearing 4 to a housing (not shown) in contact with the end surface in the axial direction (see, for example, Patent Document 1).

  Further, there is a demand for downsizing the transmission along with downsizing of automobiles. As a bearing device that meets such demands, as shown in FIG. 13, a small diameter is provided at the axial end of the outer peripheral surface of the outer ring 2 of the rolling bearing 4. A stepped portion 6 is provided, and a fixed plate 7 is fitted and fixed to the small diameter stepped portion 6 (see, for example, Patent Document 2).

  In this bearing device, after fixing the fixed plate 7 to the small-diameter step portion 6 of the outer ring 2, a plurality of circumferential positions on the peripheral edge of the inner peripheral portion of the fixed plate 7 are axially pressed by a press device or the like. As a result, locking projections 8 protruding radially inward are formed at a plurality of locations in the circumferential direction on the inner peripheral portion of the fixed plate 7 that is extrapolated to the small-diameter step portion 6, and the locking projections 8 are formed at the small-diameter step portion. 6 is locked in a locking groove 9 formed on the outer peripheral surface of the 6.

  According to this bearing device, the axial dimension can be shortened compared with the case where the fixed plate 5 is brought into contact with the axial end surface of the outer ring 2 (FIG. 12), and the transmission can be downsized.

JP 2004-028123 A German Patent Application Publication No. 102004031830

  However, in Patent Document 2, as described above, after fixing the fixed plate 7 to the small-diameter step portion 6 of the outer ring 2, a plurality of circumferential positions on the peripheral edge of the inner peripheral portion of the fixed plate 7 are arranged in the axial direction. By pressing with a pressing device or the like, a locking projection 8 that locks in the locking groove 9 of the outer ring 2 is formed on the inner peripheral portion of the fixed plate 7.

  For this reason, not only the pressing operation by the pressing device or the like becomes troublesome, but it is difficult to confirm whether or not the locking projection 8 is properly formed on the inner peripheral portion of the fixed plate 7, and the efficiency of the assembly operation of the bearing device is reduced. Therefore, there is a problem that productivity is inferior.

  The present invention has been made in order to eliminate such inconveniences, and an object of the present invention is to provide a bearing device capable of improving the productivity by improving the efficiency of assembly work.

The above object of the present invention can be achieved by the following constitution.
(1) A rolling bearing in which a plurality of rolling elements are disposed between the inner ring and the outer ring, and a locking groove is formed in the outer circumferential portion of the outer ring along the circumferential direction, and in order to fix the rolling bearing to the housing, A fixing plate that is fitted to the outer peripheral portion of the outer ring and has a locking projection on the inner peripheral portion that is locked to the locking groove when fitted,
The fixed plate is a plate piece divided into at least two in the circumferential direction;
A fitting portion formed at a split end of one of the two plate pieces;
A mated portion that is formed at the split end of the other plate piece of the two plate pieces, the fitting portion of one plate piece is fitted in the axial direction, and the two plate pieces are connected in the circumferential direction; Have
One of the two plate pieces has a locking projection formed on a portion of the inner peripheral portion excluding both ends in the circumferential direction, and the locking projection is locked in the locking groove. The bearing device is characterized in that the split end is elastically deformable in the axial direction.
(2) The fitting portion is a convex portion protruding in the circumferential direction from the divided end of one plate piece, and the fitted portion is a concave portion cut out at the divided end of the other plate piece. The bearing device according to (1).
(3) The fitting portion is a concave portion cut out at the divided end of one plate piece, and the fitted portion is a convex portion protruding in the circumferential direction from the divided end of the other plate piece. The bearing device according to (1).
(4) A small diameter step portion to which a fixing plate is fitted is provided on the outer peripheral portion of the outer ring in the axial direction, and a locking groove is formed on the outer peripheral surface of the small diameter step portion. ) The bearing device according to any one of

  According to the present invention, when assembling the bearing device, the pressing operation of the fixed plate by the pressing device or the like and the operation of confirming whether or not the locking protrusion is appropriately formed on the inner peripheral portion of the fixing plate are not required. The efficiency of the assembling work of the bearing device can be increased, and thus the productivity can be improved.

Hereinafter, an embodiment of a bearing device according to the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view of a main part for explaining an embodiment of a bearing device according to the present invention, FIG. 2 is a perspective view showing a state in which a fixing plate is fitted to the outer peripheral portion of a small-diameter step portion of the outer ring, and FIG. FIG. 4 is a view of the fixing plate shown in FIG. 2 as viewed from the axial direction, and FIG. 4 is a perspective view of a main part for explaining a state in which the locking protrusion of the fixing plate is locked in the locking groove of the small-diameter step. 5 is a partially enlarged view of FIG. 4, FIG. 6 is a perspective view of a main part for explaining a connection example of a split end of a pair of plate pieces constituting the fixed plate shown in FIG. 3, and FIGS. It is a figure for demonstrating a modification.

  As shown in FIGS. 1 and 2, the bearing device 10 according to the present embodiment is fitted to a rolling bearing 11 and an outer peripheral portion of the rolling bearing 11 so as to fix the rolling bearing 11 to a housing (not shown). A fixing plate 12.

  As shown in FIG. 1, the rolling bearing 11 includes an outer ring 13 having an outer ring raceway surface 13a on an inner peripheral surface, an inner ring 14 having an inner ring raceway surface 14a on an outer peripheral surface, and an inner ring raceway surface 14a and an outer ring raceway surface 13a. A plurality of rolling elements 15 disposed so as to be capable of rolling in the circumferential direction therebetween, a cage 16 that holds the plurality of rolling elements 15 at substantially equal intervals in the circumferential direction, and in both axial ends of the outer ring 13 And a seal member 17 that is mounted on each peripheral portion and seals between the bearing space and the outside.

  Further, a small-diameter step portion 18 into which the fixed plate 12 is fitted is formed on the outer peripheral portion of the outer end of the outer ring 13 in the axial direction. On the outer peripheral surface of the small-diameter step portion 18 on the end surface 18a side, a locking groove 19 having a concave cross section is formed along the entire circumference.

  As shown in FIG. 2, the fixing plate 12 has a substantially circular flange shape, and insertion holes 20 for bolts (not shown) for fixing to the housing are formed at substantially equal intervals in the circumferential direction. ing. 2 and 4 to 6, only the outer ring 13 of the rolling bearing 10 is illustrated for convenience.

  Here, as shown in FIGS. 2 and 3, the fixed plate 12 is configured by connecting a pair of semi-disc-shaped plate pieces 12 a and 12 b divided into two in the circumferential direction at the divided ends. Is done.

  A substantially circular convex portion (fitting portion) 22 protruding in the circumferential direction is formed at each divided end on both ends in the circumferential direction of the plate piece 12a. Further, as shown in FIGS. 3 to 5, the inner peripheral portion of the plate piece 12 a is fitted into a locking groove 19 formed in the small diameter step portion 18 of the outer ring 13, and is locked to the locking groove 19. The locking protrusion 21a is formed along substantially the entire length in the circumferential direction.

  On the other hand, a substantially circular concave portion (fitted portion) 23 cut out in the circumferential direction is formed at each divided end on both ends in the circumferential direction of the plate piece 12b. The convex portion 22 of the plate piece 12a is fitted in the concave portion 23 of the plate piece 12b in the axial direction, whereby the divided ends of the pair of plate pieces 12a and 12b are connected in the circumferential direction. The

  Also, as shown in FIG. 3, the portion of the inner peripheral portion of the plate piece 12b excluding both ends in the circumferential direction is fitted into a locking groove 19 formed in the small-diameter step portion 18 of the outer ring 13, Locking protrusions 21b to be locked in the locking grooves 19 are formed along the circumferential direction. In a state in which the locking projection 21b is locked in the locking groove 19, each divided end on both ends in the circumferential direction of the plate piece 12b can be elastically deformed in the axial direction.

  When the fixed plate 12 is fitted to the small diameter step portion 18 of the outer ring 13, the locking protrusion 21a of the plate piece 12a is fitted into the locking groove 19 of the small diameter step portion 18, while the engagement of the plate piece 12b. With the stop projection 21b fitted in the locking groove 19 of the small-diameter step portion 18, as shown in FIG. 6, the respective divided ends on both ends in the circumferential direction of the plate piece 12b are elastically deformed in the axial direction. The concave portion 23 is fitted into the convex portion 22 of the plate piece 12a in the axial direction.

  As a result, the divided ends of the pair of plate pieces 12a and 12b are connected in the circumferential direction, and the axial movement of the outer ring 13 is restricted with respect to the fixed plate 12, and the outer ring 13 of the rolling bearing 11 is fixed. The plate 12 is coupled, and the bearing device 10 is assembled.

  As described above, according to the bearing device 10 of the present embodiment, the locking protrusion 21a of the plate piece 12a is fitted into the locking groove 19 of the small diameter step portion 18 while the locking protrusion 21b of the plate piece 12b is fitted. In a state of being fitted in the locking groove 19 of the small-diameter stepped portion 18, each of the divided ends on both ends in the circumferential direction of the plate piece 12b is elastically deformed in the axial direction, so that the concave portion 23 becomes the convex portion 22 of the plate piece 12a. The bearing device 10 can be easily assembled by fitting it in the axial direction.

  Therefore, when assembling the bearing device 10, it is not necessary to press the fixing plate 12 with a pressing device or the like and to confirm whether or not the locking protrusions 21 a and 21 b are appropriately formed on the inner peripheral portion of the fixing plate 12. Become. Thereby, the efficiency of the assembly operation of the bearing device 10 can be increased, and the productivity can be improved.

  The configuration of the inner ring, outer ring, rolling element, rolling bearing, fixed plate, plate piece, locking groove, locking projection, small diameter stepped portion, fitting portion, fitted portion, etc. of the present invention is the above embodiment. However, the present invention is not limited to the examples described above, and can be appropriately changed without departing from the gist of the present invention.

  For example, in the above-described embodiment, the case where the convex portion 22 is formed at the divided end of the plate piece 12a and the concave portion 23 is formed at the divided end of the plate piece 12b is illustrated, but instead, this is shown in FIGS. Thus, the recessed part 23 may be formed in the division | segmentation end of the plate piece 12a, and the convex part 22 may be formed in the division | segmentation end of the plate piece 12b.

  In this case, the locking projection 21a of the plate piece 12a is fitted into the locking groove 19 of the small diameter step portion 18, while the locking projection 21b of the plate piece 12b is fitted into the locking groove 19 of the small diameter step portion 18. Then, as shown in FIG. 9, the respective split ends on both ends in the circumferential direction of the plate piece 12b are elastically deformed in the axial direction, and the convex portion 22 is fitted into the concave portion 23 of the plate piece 12a in the axial direction.

  Moreover, in the said embodiment, the convex part 22 is each formed in each division | segmentation end of the circumferential direction both ends of the plate piece 12a, and the recessed part 23 is each formed in each division | segmentation end of the circumferential direction of the plate piece 12b. However, the present invention is not limited to this. For example, as shown in FIG. 10, a convex portion 22 is formed at one end of the plate piece 12a in the circumferential direction, and a concave portion 23 is formed at the other divided end, so that one end side in the circumferential direction of the plate piece 12b is formed. A concave portion 23 may be formed at the divided end, and a convex portion 22 may be formed at the divided end on the other end side. Moreover, as shown in FIG. 11, the recessed part 23 is formed in the division | segmentation end of the one end side of the circumferential direction of the plate piece 12a, and the convex part 22 is formed in the division | segmentation end of the other end side, The one end side of the circumferential direction of the plate piece 12b Alternatively, a convex portion 22 may be formed at the divided end, and a concave portion 23 may be formed at the other divided end.

  Furthermore, although the case where the external shape of the fixed plate 12 was made into the substantially circular flange shape was illustrated in the said embodiment, it is not limited to this, For example, the external shape of the fixed plate 12 is good also as a substantially triangular flange shape.

  Furthermore, in the said embodiment, although the fixed plate 12 was illustrated by connecting a pair of semi-disc-shaped plate pieces 12a, 12b divided into two in the circumferential direction at the divided ends, However, the fixing plate may be configured by connecting the plate pieces divided into three or more in the circumferential direction to each other at the divided ends.

It is principal part sectional drawing for demonstrating one Embodiment of the bearing apparatus which concerns on this invention. It is a perspective view which shows the state by which the fixing plate was fitted by the outer peripheral part of the small diameter step part of an outer ring. It is the figure which looked at the fixed plate shown in FIG. 2 from the axial direction. It is a principal part perspective view for demonstrating the state by which the latching protrusion of a fixed plate is latched by the latching groove of a small diameter step part. It is the elements on larger scale of FIG. It is a principal part perspective view for demonstrating the connection example of the division | segmentation end of a pair of plate piece which comprises the fixed plate shown in FIG. It is a perspective view for demonstrating the modification of a fixing plate. It is the figure which looked at the fixed plate shown in FIG. 7 from the axial direction. It is a principal part perspective view for demonstrating the connection example of the division | segmentation end of a pair of plate piece which comprises the fixed plate shown in FIG. It is a figure for demonstrating the modification of a fixed plate. It is a figure for demonstrating the modification of a fixed plate. It is principal part sectional drawing for demonstrating the conventional bearing apparatus. It is principal part sectional drawing for demonstrating the other conventional bearing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bearing apparatus 11 Rolling bearing 12 Fixed plate 12a Plate piece 12b Plate piece 13 Outer ring 14 Inner ring 15 Rolling element 18 Small diameter step part 19 Locking groove 21a Locking protrusion 21b Locking protrusion 22 Convex part (fitting part)
23 Recessed part (fitting part)

Claims (4)

A plurality of rolling elements are arranged between the inner ring and the outer ring, and a rolling bearing in which a locking groove is formed in the outer circumferential portion of the outer ring along the circumferential direction, and the rolling bearing is fixed to the housing, A fixing plate that is fitted to the outer peripheral portion of the outer ring and has a locking projection on the inner peripheral portion that is locked to the locking groove at the time of the fitting,
The fixed plate is a plate piece divided into at least two in the circumferential direction;
A fitting portion formed at a split end of one of the two plate pieces;
Formed at the split end of the other plate piece of the two plate pieces, and the fitting portion of the one plate piece is fitted in the axial direction to connect the two plate pieces in the circumferential direction And having
One of the two plate pieces has the locking protrusion formed on a portion of the inner peripheral portion excluding both ends in the circumferential direction, and the locking protrusion is locked in the locking groove. In this state, the split end is elastically deformable in the axial direction.   The fitting portion is a convex portion protruding in the circumferential direction from the divided end of the one plate piece, and the fitted portion is a concave portion cut out at the divided end of the other plate piece. The bearing device according to claim 1.   The fitting portion is a concave portion cut out at the divided end of the one plate piece, and the fitted portion is a convex portion protruding in the circumferential direction from the divided end of the other plate piece. The bearing device according to claim 1.   4. A small-diameter step portion into which the fixing plate is fitted is provided on the outer peripheral portion of the outer ring in the axial direction, and the locking groove is formed on the outer peripheral surface of the small-diameter step portion. The bearing device according to any one of the above.

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