JP2009036319A - Bearing device and method for assembling bearing device - Google Patents

Abstract

A bearing device capable of improving the efficiency of assembly work and improving productivity.
A bearing device 10 includes a rolling bearing 11 in which a plurality of rolling elements 15 are disposed between an inner ring 14 and an outer ring 13, and an outer peripheral portion of the outer ring 13 to fix the rolling bearing 11 to a housing. And a fixed plate 12 to be fitted. Locking grooves 19 are formed in the outer peripheral portion of the outer ring 13, and a plurality of locking claws 21 protruding radially inward are formed at equal intervals in the circumferential direction on the inner peripheral portion of the fixed plate 12. Then, by engaging the inner peripheral portion of the fixed plate 12 with the outer peripheral portion of the outer ring 13, the locking claw 21 climbs over the outer peripheral surface from the axial end portion of the outer ring 13 to the locking groove 19 and performs the locking. Locked in the groove 19.
[Selection] Figure 1

Description

  The present invention relates to a bearing device used for a rotation support portion such as a gear in a transmission, for example, and an assembling method of the bearing device.

  As a conventional bearing device of this type, for example, as shown in FIG. 7, 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 the housing H in contact with the axial end face (see, for example, Patent Document 1).

  Further, there is a demand for downsizing of a transmission along with downsizing of an automobile. As a bearing device that meets such a demand, as shown in FIG. 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 periphery of the inner peripheral portion of the fixed plate 7 are pressed in the axial direction. As a result, locking claws 8 projecting 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 claws 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 to the case where the fixed plate 5 is brought into contact with the axial end surface of the outer ring 2 (FIG. 7), and the transmission can be downsized.

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

  However, in Patent Document 2, after fixing the fixed plate 7, a plurality of circumferential positions on the peripheral edge of the inner peripheral portion are pressed in the axial direction, and the outer ring 2 is locked to the inner peripheral portion of the fixed plate 7. Since the locking claw 8 to be locked in the groove 9 is formed, it is difficult to confirm whether or not the locking claw 8 is properly formed on the inner peripheral portion of the fixed plate 7. For this reason, there exists a problem that the efficiency of the assembly operation of a bearing apparatus falls and it is inferior to productivity.

  The present invention has been made to eliminate such inconveniences, and an object of the present invention is to provide a bearing device capable of improving the efficiency of assembling work and improving the productivity, and an assembling method of the bearing device. There is to do.

The above object of the present invention is achieved by the following configurations.
(1) A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a fixing plate fitted to an outer peripheral portion of the outer ring of the rolling bearing in order to fix the rolling bearing to the housing. A bearing device comprising:
A locking groove formed on the outer peripheral portion of the outer ring, and a locking claw provided to protrude radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate,
By fitting the inner peripheral part of the fixed plate to the outer peripheral part of the outer ring, the locking claw gets over the outer peripheral surface from the axial end of the outer ring to the locking groove and is locked to the locking groove. A bearing device.
(2) The outer diameter of the outer ring in the axial direction is provided with a small-diameter step portion to which the fixing plate is fitted, and a locking groove is formed on the outer peripheral surface of the small-diameter step portion. Bearing device.
(3) a rolling bearing in which a plurality of rolling elements are disposed between the inner ring and the outer ring, and a fixing plate fitted to the outer peripheral portion of the outer ring of the rolling bearing in order to fix the rolling bearing to the housing. A method for assembling a bearing device comprising:
A plurality of circumferential circumferential positions of the periphery of the inner peripheral portion of the fixed plate are formed by pressing in the axial direction to form locking claws that protrude radially inward,
By fitting the inner peripheral part of the fixing plate to the outer peripheral part of the outer ring, the locking claw is moved over the outer peripheral surface from the axial end of the outer ring to the locking groove formed in the outer peripheral part of the outer ring. The bearing device is assembled in the locking groove.

  According to the present invention, when assembling the bearing device, since it is not necessary to check whether or not the locking claw is properly formed on the inner peripheral portion of the fixed plate, the efficiency of the assembly operation of the bearing device is increased. 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.
FIG. 1 is a cross-sectional view of an essential part for explaining an embodiment of a bearing device according to the present invention, and FIG. 2 is a perspective view showing a state in which a fixing plate is fitted and fixed to the outer peripheral portion of a small-diameter step portion of the outer ring. 3 is a perspective view seen from the back side of FIG. 2, FIG. 4 is a cross-sectional view of a main part for explaining a process of forming a locking claw on the inner peripheral portion of the fixing plate, and FIG. 5 is fixed to a small diameter step portion of the outer ring. FIG. 6 is a fragmentary cross-sectional view showing a state in which the locking claw of the fixed plate is locked in the locking groove of the outer ring.

  As shown in FIG. 1, the bearing device 10 of the present embodiment includes a rolling bearing 11 and a fixing plate 12 that is fitted to the outer peripheral portion of the rolling bearing 11 so as to fix the rolling bearing 11 to a housing (not shown). And comprising.

  The rolling bearing 11 rolls in a circumferential direction between 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 that are movably disposed, a cage 16 that holds the plurality of rolling elements 15 at substantially equal intervals in the circumferential direction, and inner peripheral portions of both ends in the axial direction of the outer ring 13 are respectively mounted. And a seal member 17 that seals between the bearing space and the outside.

  A small-diameter step portion 18 to which the fixing plate 12 is fitted is formed on the outer peripheral portion of the outer ring 13 in the axial direction. A stop groove 19 is formed along the entire circumference in the circumferential direction.

  On the other hand, as shown in FIGS. 2 and 3, the fixing plate 12 has a flange shape having a substantially triangular outer shape, and bolts (not shown) insertion holes 20 are formed on the three apex sides of the triangular shape. ing. 2 and 3, only the outer ring 13 of the rolling bearing 10 is shown for convenience.

  Further, as shown in FIGS. 1 and 3, a locking claw 21 that is locked in a locking groove 19 formed in the small-diameter step portion 18 of the outer ring 13 is radially inward on the inner peripheral portion of the fixed plate 12. Is formed to protrude. In the present embodiment, the latching claws 21 are formed at three locations at substantially equal intervals in the circumferential direction, and the three latching claws 21 are provided on the three apexes of the triangular shape of the fixed plate 12. Each is arranged.

Next, an assembly method of the bearing device 10 will be described with reference to FIGS.
In this embodiment, the locking claws 21 are formed in advance on the inner peripheral portion of the fixing plate 12 before the fixing plate 12 is fitted to the small diameter step portion 18 of the outer ring 13.

  That is, as shown in FIG. 4, three circumferentially equidistant portions of the inner peripheral edge of the fixed plate 12 are pressed in the axial direction by a press device or the like, and the meat of the peripheral portion is formed on the fixed plate 12. The locking claw 21 is formed by bulging radially inward from the inner peripheral surface. The distal end position of the locking claw 21 is disposed at the substantially central portion in the axial direction of the inner peripheral portion of the fixed plate 12.

  Further, the inner peripheral edge of the fixing plate 12 on the opposite side of the pressing position has substantially the same diameter as the inner peripheral surface before pressing, and the distance from the inner peripheral edge to the tip of the locking claw 21 is radially inward. They are connected by a concave curved surface 22 that bulges smoothly.

  Then, as shown in FIG. 5, the engaging claw 21 is fitted to the small diameter step portion 18 side of the outer ring 13 by fitting the inner peripheral portion of the fixed plate 12 from the concave curved surface 22 side to the small diameter step portion 18 of the outer ring 13. The bearing device 10 is assembled by climbing over the outer peripheral surface from the end surface of the shaft to the locking groove 19 and being locked to the locking groove 19 (see FIG. 6).

  As described above, according to the bearing device 10 of the present embodiment, when the fixing plate 12 is fitted to the small-diameter step portion 18 of the outer ring 13, the locking claw formed in advance on the inner peripheral portion of the fixing plate 12. 21 is locked to the locking groove 19 of the small-diameter step portion 18, so that when the bearing device 10 is assembled, whether or not the locking claw 21 is appropriately formed on the inner peripheral portion of the fixed plate 12. Confirmation is not required. Thereby, the efficiency of the assembly operation of the bearing device 10 can be increased, and the productivity can be improved.

  The configurations of the inner ring, outer ring, rolling element, rolling bearing, fixed plate, locking groove, locking claw, small diameter step, etc. of the present invention are not limited to those exemplified in the above embodiment, Modifications can be made as appropriate without departing from the scope of the present invention.

For example, in the above embodiment, the case where the three locking claws 21 are formed on the inner peripheral portion of the fixed plate 12 is illustrated, but the present invention is not limited to this, and there are four or more engaging hooks on the inner peripheral portion of the fixed plate 12. The pawl 21 may be formed.
Moreover, in the said embodiment, although the case where the locking groove | channel 19 was formed in the perimeter of the outer peripheral surface of the small diameter step part 18 was illustrated, it is not limited to this, For example, of the outer peripheral surface of the small diameter step part 18 Locking grooves extending in the circumferential direction may be formed at a plurality of locations.

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 and fixed to the outer peripheral part of the small diameter step part of an outer ring. It is the perspective view seen from the back side of FIG. It is a figure for demonstrating the process of forming a latching claw in the inner peripheral part of a fixed plate, (A) is principal part sectional drawing which shows the state of the fixed plate before formation of a latching claw, (B) is related. It is principal part sectional drawing which shows the state of the fixing plate after formation of a pawl. It is principal part sectional drawing for demonstrating the process of fitting a fixing plate to the small diameter step part of an outer ring. It is principal part sectional drawing which shows the state by which the latching claw of the fixing plate was latched by the latching groove of the outer ring | wheel. 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 13 Outer ring 14 Inner ring 15 Rolling element 18 Small diameter step part 19 Locking groove 21 Locking claw

Claims (3)

A rolling bearing provided with a plurality of rolling elements between an inner ring and an outer ring; and a fixing plate fitted to an outer peripheral portion of the outer ring of the rolling bearing to fix the rolling bearing to a housing. A bearing device,
A locking groove formed in the outer peripheral portion of the outer ring, and a locking claw provided to protrude radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate,
By fitting the inner peripheral portion of the fixed plate to the outer peripheral portion of the outer ring, the locking claw gets over the outer peripheral surface from the axial end of the outer ring to the locking groove. A bearing device that is locked to the bearing.   The small diameter step part by which the said fixed plate is fitted is provided in the outer peripheral part of the axial direction edge part of the said outer ring | wheel, The said locking groove was formed in the outer peripheral surface of this small diameter step part. Bearing device. A rolling bearing provided with a plurality of rolling elements between an inner ring and an outer ring; and a fixing plate fitted to an outer peripheral portion of the outer ring of the rolling bearing to fix the rolling bearing to a housing. A method for assembling a bearing device,
A plurality of circumferential circumferential positions of the peripheral edge of the inner peripheral portion of the fixed plate are formed by pressing in the axial direction to form locking claws protruding radially inward,
By fitting the inner peripheral part of the fixed plate to the outer peripheral part of the outer ring, the outer periphery of the locking claw is extended from the axial end of the outer ring to the locking groove formed in the outer peripheral part of the outer ring. A method of assembling a bearing device, wherein the bearing device is moved over a surface and locked in the locking groove.

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