JP4752817B2 - Bearing device and method for assembling bearing device - Google Patents

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. 6, 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. 7, a small diameter is provided at an axial end of an outer peripheral surface of an outer ring 2 of a 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, a large-diameter hole portion 7 a is formed in the inner peripheral portion of the axial end portion of the fixed plate 7 by a press device or the like. Then, after fixing the fixed plate 7 to the small-diameter step portion 6 of the outer ring 2, the small-diameter step portion 6 is pressed by pressing a plurality of circumferential positions on the end surface of the large-diameter hole portion 7 a in the axial direction by a press device or the like. A locking claw 8 protruding radially inward is formed at a plurality of locations in the circumferential direction on the inner peripheral portion of the fixed plate 7 that is externally attached to the outer peripheral surface of the small-diameter step portion 6. The formed locking groove 9 is locked.

  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, it is necessary to individually press a plurality of circumferential locations on the end surface of the large-diameter hole portion 7a formed in the fixed plate 7 in the axial direction by a pressing device or the like. There is a problem that work efficiency is lowered and productivity is inferior. In addition, although it is conceivable to form the locking claw 8 by pressing the plurality of locations at once using a dedicated press device or the like, in this case, not only a dedicated press device has to be newly prepared, When the bearing size is changed, it becomes impossible to cope.

  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 can be achieved by the following constitution.
(1) A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a small-diameter step portion provided on an outer peripheral portion of the axial end of the outer ring to fix the rolling bearing to the housing. A fixed plate to be fitted, and a bearing device comprising:
A locking groove continuously provided on the end surface of the small diameter stepped portion on the outer peripheral portion of the small diameter stepped portion, and provided in a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate so as to protrude radially inwardly. A locking claw locked in the groove,
By projecting a plurality of locations in the circumferential direction on the periphery of the inner peripheral portion of the fixed plate in the axial direction, projecting portions formed to project from the axial end surface of the fixed plate in the axial direction at the plurality of locations, The bearing device is characterized in that a locking claw is formed by being plastically deformed radially inward by being pressed against.
(2) A rolling bearing in which a plurality of rolling elements are disposed between the inner ring and the outer ring, and a small-diameter step portion provided on the outer peripheral portion of the axial end of the outer ring to fix the rolling bearing to the housing. A method for assembling a bearing device comprising: a fixed plate to be fitted;
Locking claws provided to protrude radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate are provided on the outer peripheral portion of the small diameter step portion so as to be continuous with the end surface of the small diameter step portion. When engaging the rolling bearing and the fixed plate by locking in the groove,
By pressing a plurality of locations in the circumferential direction of the inner periphery of the fixed plate in the axial direction, protrusions that protrude in the axial direction from the axial end surface of the fixed plate are formed in the plurality of locations,
After fitting the fixed plate to the small-diameter step with the protrusion facing the end surface of the small-diameter step, the axial end surface on the opposite side of the protrusion of the fixed plate is axially pressed to The protrusion is plastically deformed radially inward by pressing against the end face of the small diameter step portion, thereby forming a locking claw and locking the locking claw in the locking groove. A method for assembling the bearing device.

  According to the present invention, protrusions that protrude in the axial direction are formed in advance in a plurality of locations in the circumferential direction on the periphery of the inner periphery of the fixed plate, and the protrusions are directed to the end face side of the small-diameter step portion of the outer ring. After fixing the fixed plate to the small-diameter stepped portion in the state, the axial end surface on the opposite side to the protruding portion of the fixed plate is pressed in the axial direction so that a plurality of circumferential edges of the inner peripheral portion of the fixed plate A locking claw can be simultaneously formed at the location, and the locking claw can be locked in the locking groove on the small diameter step portion side. Thereby, the efficiency of the assembly operation of the bearing device can be increased, and 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 and fixed to a small-diameter step portion of the outer ring, and FIG. 4 is a perspective view as seen from the back side of FIG. 2, FIG. 4 is a diagram for explaining a process of forming a protrusion on the fixed plate, and FIG. 5 is a diagram for explaining a process of joining the outer ring of the rolling bearing and the fixed plate. It is.

  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 the inner ring raceway surface 14a and the 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.

  Further, a small diameter step portion 18 into which the fixing plate 12 is fitted is formed on the outer peripheral portion of the outer ring 13 in the axial direction, and a small diameter is formed on the inner side in the axial direction of the outer peripheral surface of the small diameter step portion 18. A locking groove 19 that is continuous with the end surface 18a of the stepped portion 18 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.

  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 for the bearing device 10 will be described with reference to FIGS. 4 and 5.
In the present embodiment, before the fixed plate 12 is fitted to the small diameter step portion 18 of the outer ring 13, a protruding portion 12 a that protrudes in the axial direction is formed in advance on the inner peripheral portion of the fixed plate 12.

  That is, as shown in FIG. 4 (A), three places at equal intervals in the circumferential direction of the peripheral edge of the inner peripheral portion of the fixed plate 12 are pressed in the axial direction by a pressing device or the like, as shown in FIG. 4 (B). In addition, the meat of the peripheral portion is bulged in the axial direction from the axial end surface of the fixed plate 12, thereby forming a protrusion 12 a on the inner peripheral portion of the fixed plate 12.

  Then, as shown in FIG. 5 (A), the fixed plate 12 is fitted to the small-diameter step portion 18 with the protruding portion 12a facing the end surface 18a side of the small-diameter step portion 18, and then shown in FIG. 5 (B). As described above, the axial end surface of the fixed plate 12 opposite to the protruding portion 12a is pressed in the axial direction by a pressing device or the like, the protruding portion 12a is pressed against the end surface 18a of the small-diameter step portion 18, and the protruding portion 12a is Plastic deformation in the direction inside. Due to the plastic deformation, a locking claw 21 protruding radially inward is formed on the inner peripheral portion of the fixed plate 12, and the locking claw 21 is locked to the locking groove 19 on the small diameter step portion 18 side. Thereby, the outer ring | wheel 13 and the fixed plate 12 of the rolling bearing 11 are couple | bonded, and the bearing apparatus 10 is assembled.

  As described above, according to the bearing device 10 of the present embodiment, the protruding portions 12a that protrude in the axial direction are formed in advance at three equally spaced locations around the inner peripheral edge of the fixed plate 12 in advance. . Then, after fitting the fixed plate 12 to the small diameter step portion 18 in a state where the protrusion portion 12a faces the end surface 18a side of the small diameter step portion 18 of the outer ring 13, the shaft on the opposite side of the protrusion portion 12a of the fixed plate 12 By pushing the end face in the axial direction in the axial direction, the locking claws 21 are formed simultaneously at three equally spaced locations in the circumferential direction of the inner peripheral edge of the fixed plate 12, and the locking claws 21 are formed in the small-diameter step portion. It can be locked in the locking groove 19 on the 18 side. 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, protrusion, locking groove, locking claw, small diameter step, etc. of the present invention are limited to those exemplified in the above embodiment. Instead, the present invention can be modified 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 19 was formed in the circumferential direction perimeter of the outer peripheral surface of the small diameter step part 18 was illustrated, it is not limited to this, For example, the some of the outer peripheral surface of the small diameter step part 18 You may make it form the locking groove extended in the circumferential direction in a location.

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 protrusion part in a fixed plate, (A) is principal part sectional drawing which shows the state before formation of a protrusion part, (B) is the principal part which shows the state after formation of a protrusion part FIG. It is a figure for demonstrating the process of couple | bonding the outer ring | wheel and rolling plate of a rolling bearing, (A) is principal part sectional drawing which shows the state before coupling | bonding, (B) is principal part sectional drawing which shows the state after coupling | bonding. It is. 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 Protrusion part 13 Outer ring 14 Inner ring 15 Rolling element 18 Small diameter step part 19 Locking groove 21 Locking claw

Claims (2)

A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a small-diameter step provided on the outer peripheral portion of the outer ring in the axial direction so as to fix the rolling bearing to the housing. A bearing device comprising: a fixed plate;
A locking groove continuously provided on an end surface of the small-diameter step portion on the outer peripheral portion of the small-diameter step portion, and provided to protrude radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate; A locking claw locked in the locking groove,
By projecting a plurality of circumferential locations on the periphery of the inner peripheral portion of the fixed plate in the axial direction, projecting portions formed to project from the axial end surface of the fixed plate in the axial direction at the plurality of locations, the small diameter step A bearing device in which the locking claw is formed by being plastically deformed radially inward by being pressed against an end surface of the portion. A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a small-diameter step provided on the outer peripheral portion of the outer ring in the axial direction so as to fix the rolling bearing to the housing. An assembly method of a bearing device comprising:
Locking claws provided to protrude radially inward at a plurality of locations in the circumferential direction of the inner peripheral portion of the fixed plate are provided continuously on the outer peripheral portion of the small diameter step portion on the end surface of the small diameter step portion. When the rolling bearing and the fixed plate are coupled with each other by locking in the locking groove,
By pressing a plurality of locations in the circumferential direction of the peripheral edge of the inner peripheral portion of the fixed plate in the axial direction, protrusions protruding in the axial direction from the axial end surface of the fixed plate are formed in the plurality of locations,
After fitting the fixed plate to the small-diameter step portion with the protruding portion facing the end surface side of the small-diameter step portion, the axial end surface of the fixed plate on the opposite side of the protrusion portion is pushed in the axial direction. The projecting portion is plastically deformed radially inward by pressing the projecting portion against the end surface of the small-diameter stepped portion, thereby forming the retaining pawl, and the retaining pawl is moved into the retaining groove. A method of assembling a bearing device, wherein

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