JP6273793B2 - Bearing device and bearing device manufacturing method - Google Patents

Description

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

  As a conventional bearing device of this type, for example, as shown in FIG. 18, a rolling bearing 104 in which a plurality of rolling elements 103 are disposed between an inner ring 101 and an outer ring 102, and an outer ring 102 of the rolling bearing 104. And a fixed plate 105 that abuts against the axial end surface of the roller bearing 104 and fixes the rolling bearing 104 to the housing H (see 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. 19, a small diameter is provided at an axial end of an outer peripheral surface of an outer ring 102 of a rolling bearing 104. A stepped portion 106 is provided, and a circular hole 110 of a fixing plate 107 is fitted and fixed to the small diameter stepped portion 106. Further, the fixing plate 107 squeezes the peripheral portion of the circular hole portion 110 so as to project radially inwardly to form a locking portion 108, and engages with a locking groove 109 formed in the small-diameter step portion 106. (See Patent Document 2).

  Conventionally, as a method for coupling the fixed plate 107 and the bearing 104, a peripheral portion of the circular hole portion of the fixed plate is projected inward in the radial direction by crushing, and the engaging portion is formed in a small-diameter stepped portion. Various methods have been devised for engaging the retaining groove and for engaging the retaining portion over the small-diameter step portion (see, for example, Patent Documents 1 to 8), and the outer peripheral surface of the outer ring 102. It is known that a notch is provided in the small-diameter step portion 106 at the end portion in the axial direction (see Patent Document 9).

JP 2004-028123 A German Patent Application Publication No. 102004031830 Japanese Patent No. 4752817 JP2013-29148A Japanese Patent No. 4877135 Japanese Patent No. 5146579 JP2013-137071A International Publication No. 2009/132818 JP 2008-256138 A

  By the way, conventionally, the crushing process of the anti-barre projection has few processing steps as in Patent Document 3, and is very excellent as a low cost idea. However, because of its simplicity, punch accuracy and component accuracy affect the control of the travel amount of multiple projections (inscribed circle), and the shape of the projection itself changes depending on the amount of meat to be crushed. Control is very difficult from the viewpoint of interference. Even in the method of Patent Document 7, since the protrusions escape to the outside at the time of assembling, there is a high possibility that after the bearing is assembled, the protrusions are plastically deformed to the outside and the protrusions do not return to perform the non-separating function.

  Further, in Patent Document 8, there is a proposal that a protrusion is provided by the second press after overhanging the outer ring hanging portion by the first press and removing the protruding portion, but this is also formed by crushing the protrusion itself. Therefore, stabilization of the protrusion shape is not easy.

  Here, for the convenience of assembly, the race ring and the fixed plate must be allowed to rotate relative to each other, and the relative rotation failure due to interference was a major cause of failure. If it is difficult to control the shape with the fixed plate, the idea is to escape with the shape of the assembly part of the race ring. However, it is much more important, and inevitably there is a restriction that the shape of the assembly surface with the fixed plate is formed in an extra space.

  In view of the above problems, the present invention aims to provide a bearing device and a manufacturing method of the bearing device capable of suppressing the number of parts to the limit as described above, stably forming the protrusion shape, and avoiding interference with the raceway and relatively rotating. It is to provide.

The above object is achieved by the following configuration.
(1) A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a circular hole that is fitted to an outer peripheral surface of the outer ring of the rolling bearing so as to fix the rolling bearing to a housing. A bearing device comprising:
A small-diameter step portion to which the fixing plate is fitted is provided on the outer peripheral portion of the outer ring in the axial direction, and a locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small-diameter step portion,
On the outer peripheral surface of the small-diameter step portion, a first flat portion is provided on the inner side in the axial direction with respect to the locking groove, and a second flat portion is provided on the outer side in the axial direction.
In the circular hole portion of the fixing plate, a plurality of locking portions that protrude radially inward and are formed using a press punching process are provided,
The inner peripheral surface of the circular hole portion of the fixed plate has a crushing surface and a punching surface, and the locking portion is provided on the punching surface,
On the inner peripheral surface of the circular hole portion of the fixing plate, a recess is formed around the locking portion,
The locking portion is moved over the outer peripheral surface from the axial end of the outer ring to the locking groove while being elastically deformed or plastically deformed, and locked to the locking groove ,
A radial clearance between the locking portion and the locking groove is A, a radial clearance between the second flat surface portion and the crushing surface is B, and the first flat surface portion and the punching processing are performed. A bearing device characterized by satisfying A> B, A> C, and B> C, where C is a clearance in a radial direction with respect to the surface .
(2) the fixed plate according to (1) to have the recess in the plurality positions of the inner peripheral portion of the locations including the locking portion facing the axial end surface of the cylindrical portion Bearing device.
( 3 ) The locking portion is formed using a press punching step of the fixed plate and a step of bending an inner peripheral portion of the fixed plate punched out in the axial direction (1) ) Or the bearing device according to (2) .
( 4 ) The outer ring has a notch at an outer peripheral surface near the end of the small-diameter stepped portion at least at one position in the same phase in the circumferential direction as the locking portion (1) to ( 3 ). A bearing device according to any one of the above.
( 5 ) A rolling bearing in which a plurality of rolling elements are disposed between the inner ring and the outer ring, and a circular hole portion fitted to the outer peripheral surface of the outer ring of the rolling bearing so as to fix the rolling bearing to the housing. A method of assembling a bearing device comprising:
A small-diameter step portion to which the fixing plate is fitted is provided on the outer peripheral portion of the outer ring in the axial direction, and a locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small-diameter step portion,
On the outer peripheral surface of the small diameter step portion, a first flat portion is provided on the axially inner side with respect to the locking groove, and a second flat portion is provided on the outer side in the axial direction.
In the circular hole portion of the fixed plate, each projecting radially inward and forming a plurality of locking portions formed using a press punching process,
The inner peripheral surface of the circular hole portion of the fixed plate has a crushing surface and a punching surface, and the locking portion is provided on the punching surface,
Forming a recess around the locking portion on the inner peripheral surface of the circular hole of the fixed plate;
The locking part is moved over the outer peripheral surface from the axial end of the outer ring to the locking groove while being elastically deformed or plastically deformed, and locked to the locking groove ,
A radial clearance between the locking portion and the locking groove is A, a radial clearance between the second flat surface portion and the crushing surface is B, and the first flat surface portion and the punching processing are performed. A bearing device assembling method characterized by satisfying A> B, A> C, and B> C, where C is a clearance in a radial direction with respect to the surface .
(6) the fixing plate having the constitution (5) to have the recess in the plurality positions of the inner peripheral portion of the locations including the locking portion facing the axial end surface of the cylindrical portion A method for assembling the bearing device.
( 7 ) The locking portion is formed using a press punching step of the fixed plate and a step of bending the inner peripheral portion of the fixed plate punched out in the axial direction (5) Or a method for assembling the bearing device according to (6) .
( 8 ) The outer ring has a notch at an outer peripheral surface near the end of the small-diameter stepped portion at least at one position in the same phase in the circumferential direction as the locking portion ( 5 ) to ( 7 ). A method for assembling the bearing device according to any one of the above.

According to the present invention, a small-diameter step portion to which the fixing plate is fitted is provided on the outer peripheral portion of the outer ring in the axial direction, and a locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small-diameter step portion. In the outer peripheral surface of the small diameter step portion, a first flat portion is provided on the inner side in the axial direction with respect to the locking groove, and a second flat portion is provided on the outer side in the axial direction. , Each projecting radially inward and provided with a plurality of locking portions formed using a press punching process, the inner peripheral surface of the circular hole portion of the fixed plate has a crushing surface and a punching surface, The locking portion is provided on the punched surface, a recess is formed around the locking portion on the inner peripheral surface of the circular hole portion of the fixing plate, and the locking portion extends from the axial end of the outer ring to the locking groove. the outer peripheral surface of the up, rides over while elastically deformed or plastically deformed, to engage with the locking groove The radial clearance between the locking portion and the locking groove is A, the radial clearance between the second flat portion and the crushing surface is B, and the radial clearance between the first flat portion and the punching surface is When the clearance is C, A> B, A> C, and B> C are satisfied . Thereby, the latching | locking part of a fixed plate can be shape | molded cheaply stably and accurately, the efficiency of the assembly operation | work of a bearing apparatus can be improved, and productivity can be aimed at.

It is a perspective view for explaining a first embodiment of a bearing device according to the present invention. It is a center longitudinal cross-sectional view of the bearing apparatus of FIG. (A) is the III section expanded sectional view of FIG. 2, (b) is the III 'section expanded sectional view. It is a perspective view of the fixed plate of 1st Embodiment of the bearing apparatus which concerns on this invention. It is a figure explaining the process of forming the latching | locking part in the inner peripheral part of the fixing plate of 1st Embodiment of the bearing apparatus which concerns on this invention, (a) is the fixing which shows the state which opened the preliminary hole for flesh escape The perspective view of a plate, (b) is a perspective view which shows the state which crushed to the position which a latching | locking part needed for the fixing plate of (a), (c) is for a latching | locking part formation in the fixing plate of (b) The perspective view which shows the state which carried out the punching process, (d) is the XI section enlarged view of (c), (e) is the state which formed the notch around the latching | locking part of the side which attaches the bearing of the fixed plate of (c) FIG. It is a fragmentary sectional view around the latching | locking part which concerns on the 1st modification of 1st Embodiment of the bearing apparatus which concerns on this invention. It is a fragmentary sectional view around the latching | locking part which concerns on the 2nd modification of 1st Embodiment of the bearing apparatus which concerns on this invention, (a) is a part around the latching | locking part in the state in which the fixing plate and the outer ring were incorporated. Sectional drawing, (b) and (c) are partial sectional views around the locking portion of the fixed plate before being assembled with the outer ring. It is a fragmentary sectional view around the latching | locking part which concerns on the 3rd modification of 1st Embodiment of the bearing apparatus which concerns on this invention, (a) is the part around the latching | locking part in the state in which the fixing plate and the outer ring were incorporated. Sectional drawing, (b) and (c) are partial sectional views around the locking portion of the fixed plate before being assembled with the outer ring. (A) is a front view of the fixed plate which concerns on the 4th modification of 1st Embodiment of the bearing apparatus which concerns on this invention, (b) is a perspective view of (a), (c) is VI of (a). It is sectional drawing along the -VI line. It is sectional drawing of the 5th modification of 1st Embodiment of the bearing apparatus which concerns on this invention. (A) is the IV section expanded sectional view of FIG. 10, (b) is the IV 'section expanded sectional view. (A) is a front view of a fixed plate according to a sixth modification of the first embodiment of the bearing device according to the present invention, (b) is a rear view of (a), and (c) is a perspective view of (a). (D) is sectional drawing along the VV line of (b). (A) is a front view of the fixed plate of 2nd Embodiment of the bearing apparatus based on this invention, (b) is a perspective view of (a), (c) was along the VII-VII line of (a). It is sectional drawing. It is a figure explaining the process of forming the latching | locking part in the inner peripheral part of the fixed plate of 2nd Embodiment of the bearing apparatus which concerns on this invention, (a) shows the state which opened the preliminary hole 14 for meat escape. A perspective view of the fixed plate, (b) is a perspective view showing a state in which the fixed plate of (a) is crushed to a thickness desired to be bent, and (c) is punched into a desired shape on the fixed plate of (b). FIG. 4D is a perspective view showing a state in which a thin portion is bent in the axial direction on the fixing plate of FIG. 2C to form an inner peripheral surface and a locking portion is formed at the same time. (A) is a perspective view of the outer ring of the third embodiment of the bearing device according to the present invention, (b) is an enlarged view of the VIII part of (a), (c) is a front view of (a), (d) FIG. 6 is an enlarged view of the IX portion of (c). (A) is a principal part perspective view of the notch periphery of the outer ring which concerns on the 1st modification of 3rd Embodiment of the bearing apparatus which concerns on this invention, (b) looks at the notch periphery of (a) from the front. FIG. (A) is a principal part perspective view of the notch periphery of the outer ring which concerns on the 2nd modification of 3rd Embodiment of the bearing apparatus which concerns on this invention, (b) looks at the notch periphery of (a) from the front. FIG. 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.

  Hereinafter, embodiments of the bearing device, the locking portion, and the outer ring of the present invention will be described in detail with reference to the drawings.

(First embodiment)
1 is a perspective view of a bearing device according to a first embodiment of the present invention, FIG. 2 is a central longitudinal sectional view of the bearing device of FIG. 1, and FIG. 3 (a) is a section III of FIG. FIG. 3B is an enlarged cross-sectional view of FIG. 3B, and FIG. 4 is a perspective view of a fixed plate of the bearing device.
The bearing device 10 of the present embodiment is used as, for example, a bearing device used for a rotation support portion such as a gear in a transmission, and also between the inner ring 101 and the outer ring 102 with reference to FIGS. 18 and 19 of the conventional structure. A rolling plate 104 provided with a plurality of rolling elements 103, and a fixing plate 11 having a circular hole 13 fitted to the outer peripheral surface of the outer ring 102 of the rolling bearing 104 in order to fix the rolling bearing 104 to the housing H. And comprising. In the present invention, since the configuration of the fixed plate 11 is mainly different from the conventional structure, the following description will focus on the fixed plate 11 and the outer ring 102 of the rolling bearing 104 to which the fixed plate is attached.

  As shown in FIGS. 1 and 2, a small-diameter step portion 106 into which the fixing plate 11 is fitted is formed on the outer peripheral portion of the outer ring 102 in the axial direction, and the outer peripheral surface of the small-diameter step portion 106 is formed. On the inner side in the axial direction, a locking groove 109 is formed along the entire circumference in the circumferential direction.

  On the other hand, as shown in FIG. 4, the fixing plate 11 has a circular hole 13 at the center and has a substantially triangular flange shape, and bolts (not shown) are provided on the three apex sides of the triangular shape. The insertion hole 19 is formed.

  As shown in FIGS. 2 to 4, on the inner peripheral portion of the circular hole portion 13 of the fixing plate 11, a locking portion that is locked to a locking groove 109 formed in the small diameter step portion 106 of the outer ring 102. 16 is formed projecting radially inward. In the present embodiment, the locking portions 16 are formed at three locations at substantially equal intervals in the circumferential direction, and the locking portions 16 at the three locations are respectively provided on the three apexes of the triangular shape of the fixed plate 11. Has been placed. Moreover, the recessed part 20 is formed in the inner peripheral surface of the circular hole part 13 over the circumferential direction both sides of the circumferential direction position in which the latching | locking part 16 is formed.

For securing the center of the fixed plate 11 with respect to the chipping of the locking portion 16 and the bearing, the radial guide to the outer ring 102 of the fixed plate 11 is more inward in the axial direction of the small diameter step portion 106 than the locking portion 16. It is better to guide by the flat surface portion D and the flat surface portion E outside in the axial direction . Therefore, each radial clearance between the three locking portions 16 and the locking groove 109 is A, and the inner peripheral surface of the circular hole portion 13 of the fixed plate 11 and the outer peripheral surface 106a of the small-diameter step portion 106 in the plane portion E when radial clearance B of the radial gap between the outer peripheral surface 106a of the inner peripheral surface of the circular hole 13 of the fixing plate 11 in the flat portion D and the cylindrical portion 106 is C, clearances set in that case, “Clearance A> Gap B, Clearance A> Clearance C”.
In the plane part D and the plane part E, you may guide by whichever fundamentally. However, for example, takes the diameter of the outer ring 102 (outer diameter), on the assumption that the same diameter radially inside or radially outside, "clearance B> clearance C is a fixed plate 11 in order to press working, or the gap B = Clearance C ”, and if the shape of the raceway is a type having no step on the radially inner side, only“ clearance A> clearance B ”is required.

  FIGS. 5A to 5E are views for explaining a process of forming the locking portion 16 on the inner peripheral portion of the fixed plate 11 of the bearing device according to the present invention.

  As shown in FIG. 5A, in the first step, a spare hole 14 for escaping meat is made in the fixed plate 11 in preparation for the step forming to be kept in the subsequent step.

  As shown in FIG. 5B, in the second step, the fixing plate 11 processed in the first step is crushed to a radial position where the locking portion 16 is formed.

  As shown in FIGS. 5C and 5D, in the third step, the fixing plate 11 processed in the second step is punched to form the locking portion 16. Here, the punching direction is preferably punched from the outer surface in the axial direction of the fixed plate 11 toward the axial direction, that is, from the front to the back in FIG. 5 (c). As shown in d), the inner peripheral surface of the circular hole 13 and the locking portion 16 are formed. As shown in FIG. 5D, when the punching process is performed, a shearing surface 17 and a fracture surface 18 are formed in the locking portion 16, but a shearing surface with good dimensional accuracy by subsequent planar polishing. 17 and the fracture surface 18 is removed. Even if the fracture surface 18 remains, since the fracture surface 18 is tapered, the effect of stabilizing the position of the fixed plate 11 to some extent can be expected when the outer ring 102 is press-fitted.

  As shown in FIG. 5E, in the fourth step, the fixing plate 11 processed in the third step is moved from the axially inner side surface of the fixing plate 11, that is, from the front side in FIG. The periphery of 16 is removed by surface grinding, for example. This removal process suppresses the deformation of the raceway surface of the outer ring 102 when the locking portion 16 is formed near the center of the fixing plate 11 in the axial direction, when the rigidity of the locking portion 16 is to be lowered. This is done for the purpose of relaxing the contact point. In addition, when the recessed part 20 formed by this removal process can be made by press molding, it may be performed simultaneously in the second step or between the second step and the third step.

Note that the steps described with reference to FIGS. 5A to 5E are descriptions for manufacturing the fixed plate 11, and therefore the bosses and the outline of the fixed plate 11 are easy to understand. Therefore, it is shown in the completed shape image in advance, and in actual manufacturing, if boss molding or outer punching processing is performed at the timing considered necessary to ensure accuracy, such as before and after the inner diameter shape molding process, or in the middle Well, the molding process timing other than the inner diameter is not limited.
The fixing plate 11 configured in this manner is formed with a locking portion 16 using unprecedented press processing, so that the protruding shape of the locking portion 16 can be formed inexpensively, stably and with high accuracy. If the adjustment of the amount to be crushed in the crushing process in the second step and the adjustment of the amount to be removed in the removal process in the fourth step are combined, the locking portion 16 is formed in the axial direction. The position can also be controlled from both axial sides.

  The fixed plate 11 configured in this manner allows the locking portion 16 to get over the outer peripheral surface from the axial end of the outer ring 102 to the locking groove 109 while elastically deforming, and locks the locking portion 109 to the locking groove 109. The circular hole 13 of the fixed plate 11 is fitted to the outer peripheral surface of the outer ring 102.

  As described above, according to the bearing device 10 of the present embodiment, the outer diameter of the outer ring 102 is provided with the small-diameter step portion 106 to which the fixing plate 11 is fitted, and the small-diameter step portion. A locking groove 109 extending in the circumferential direction is formed on the outer peripheral surface of the portion 106, and a plurality of locking holes protruding inward in the radial direction in the circular hole portion 13 of the fixed plate 11 and formed using a press punching process. A portion 16 is provided, and the locking portion 16 gets over the outer peripheral surface from the axial end of the outer ring 102 to the locking groove 109 while being elastically deformed or plastically deformed, and is locked to the locking groove 109. . Thereby, the latching | locking part 16 of the fixed plate 11 can be shape | molded cheaply, stably and accurately, the efficiency of the assembly operation | work of the bearing apparatus 10 can be improved, and productivity can be aimed at. .

  In the above embodiment, the axial side surface of the recess 20 is formed along the radial direction. However, as in the first modification shown in FIG. It may be formed to be inclined. Note that the inclination angle of the tapered surface is preferably the same as the chamfering angle at the edge 106b of the outer peripheral surface 106a of the small-diameter stepped portion 106 of the outer ring 102 from the viewpoint of assembling.

  Moreover, in the said embodiment, although the latching | locking part 16 overcame the outer peripheral surface of the small diameter step part 106 by elastic deformation, it extends to radial direction and is arrange | positioned in the latching groove | channel 109, FIG. Or as shown to Fig.8 (a), you may arrange | position in the latching groove | channel 109 in the bent shape.

In the above-described embodiment shown in FIGS. 1 to 5, the case where the locking portion is elastically deformed and engages with the locking groove has been described, but it may be incorporated while being bent by plastic deformation.
That is, in the present invention, the following (A-1), (A-2), (B-1), and (B-2) are methods for incorporating the fixed plate 11 into the small diameter step portion 106 of the outer ring 102. There is a pattern, and it can be incorporated in combination with various shapes of the locking portion 16 as appropriate.
(A-1): Before assembling, the locking portion 16 is inclined in advance so as to be easily assembled, and incorporated by elastic deformation (pachin insertion).
(A-2): Before assembling, the locking portion 16 is inclined in advance so as to be easily assembled and assembled while being plastically deformed (bent).
(B-1): Incorporating by elastic deformation by a method that overcomes the contact diameter of the raceway with the shape when punched.
(B-2): Incorporate while deforming plastically (bending) by the method of getting over the contact diameter of the raceway ring with the shape when punched.

  For example, in the second modified example shown in FIG. 7, the locking portion 16 extending in the radial direction as shown in FIG. 7B is used as the outer periphery of the small-diameter stepped portion 106 as shown in (B-2) above. When climbing over the surface 106a, it may be plastically deformed and incorporated into the locking groove 109. Alternatively, the locking portion 16 inclined in advance as shown in FIG. 7C is elastically deformed when getting over the outer peripheral surface 106a of the small-diameter stepped portion 106, as in (A-1), and the locking groove 109 is obtained. It may be incorporated into.

  Further, in the third modification shown in FIG. 8, the inclined locking portion 16 as shown in FIG. 8 (b) gets over the outer peripheral surface 106a of the small-diameter step portion 106 as described above (A-2). At this time, the retaining groove 109 may be plastically deformed. Alternatively, the locking portion 16 bent in the axial direction as shown in FIG. 8 (c) is elastically deformed when the outer peripheral surface 106a of the small-diameter step portion 106 is moved over as in (A-1). It may be incorporated in the groove 109.

  Further, as in the fourth modified example shown in FIG. 9, the concave portion 20 of the fixed plate 11 may be formed shallower than in the above embodiment, and the locking portion 16 may be formed closer to the inner surface in the axial direction.

  Further, as in the fifth modification shown in FIGS. 10 and 11, when the fixing plate 11 as in the fourth modification is used, the locking groove 109 extends to the end surface in the axial direction of the small diameter step portion 106. It may be formed. Also in this modification, the radial clearances between the three locking portions 16 and the locking grooves 109 are A, and the inner peripheral surface of the circular hole portion 13 of the fixing plate 11 and the outer peripheral surface 106a of the small-diameter step portion 106. When the radial clearance is B, the gap is formed so as to satisfy A> B.

  Further, as in the sixth modification shown in FIG. 12, the fixing plate 11 may be formed so that the fixing plate 11 and the locking portion 16 are flush with each other without providing the recess 20. This fixing plate 11 is also applied when there is no step portion on the inner side in the axial direction of the locking groove 109 of the outer ring 102.

(Second Embodiment)
FIG. 13 (a) is a front view of the fixed plate 11 of the second embodiment of the bearing device according to the present invention, FIG. 13 (b) is a perspective view of FIG. 13 (a), and FIG. It is sectional drawing along the VII-VII line of Fig.13 (a).
The fixing plate 11 according to the second embodiment has a locking portion formed on the inner peripheral surface of the circular hole portion 13 by a press punching step and a step of bending the inner peripheral portion of the press punched fixing plate 11 in the axial direction. When molding 16, the thin wall portion 21 is provided, and the thin wall portion 21 is bent in the axial direction to constitute the inner peripheral surface of the fixed plate 11.

  Hereinafter, with reference to FIG. 14, the manufacturing method of the fixed plate 11 of this embodiment is demonstrated. As shown in FIG. 14 (a), in the first step, a spare hole 14 for escaping meat is made in the fixing plate 11 in preparation for the step forming to be avoided in the subsequent step.

  Then, as shown in FIG. 14 (b), in the second step, the fixed plate 11 processed in the first step is crushed until the desired thickness is obtained.

As shown in FIG. 14C, in the third step, the fixing plate 11 processed in the second step is punched into a desired shape. By this step, the thin portion 21 that is bent in a later step is formed. The radial length of the thin portion 21 is substantially equivalent to the axial length of the fixed plate 11 except in the vicinity where the locking portion 16 is formed.
In addition, the radial length of the thin portion 21 can be arbitrarily adjusted in accordance with the shape of the outer ring 102. For example, the thin portion other than the vicinity where the locking portion 16 is formed is omitted (punched and removed). You can also.

  As shown in FIG. 14D, in the fourth step, the thin portion 21 of the fixing plate 11 processed in the third step is bent in the axial direction to form the inner peripheral surface of the fixing plate 11, and the process Inside, the locking portion 16 is also formed. In addition, the shape of the latching | locking part 16 shown in FIG.14 (d) is an example, and is not limited to the shape.

As in the second embodiment, the concentricity between the inner peripheral surface and the locking portion 16 is improved by forming the thin portion 21 constituting the inner peripheral surface of the fixed plate 11 and the locking portion 16 at the same time. As a result, the assembly accuracy can be further improved.
Other configurations and operations are the same as those in the first embodiment.

(Third embodiment)
FIG. 15A is a perspective view of the outer ring 102 of the third embodiment of the bearing device according to the present invention, FIG. 15B is an enlarged view of the VIII portion of FIG. 15A, and FIG. FIG. 15A is a front view of FIG. 15A, and FIG. 15D is an enlarged view of the IX portion of FIG. 15C.
In the present embodiment, the notch 12 is formed in a substantially fan shape when viewed from the axial direction on at least one position in the circumferential direction in phase with the locking portion 16 on the outer peripheral surface near the end of the small diameter step portion 106 of the outer ring 102. Has been.
As described above, when the outer ring 102 and the fixed plate 11 are assembled, the phases of the notch 12 and the locking portion 16 can be matched more smoothly.
If the locking portion 16 is incorporated from the notch 12 on the outer peripheral surface near the end of the small-diameter step portion 106 of the outer ring 102, the notch 12 is not only used when elastically deformed but also when incorporated plastically. Compared with incorporating from the outer peripheral surface having no twelve, the amount of plastic is less, and a stronger holding effect can be obtained.

As a general method of assembling the outer ring 102 and the fixing plate 11, for example, as shown in FIG. 15C, the outer ring 102 provided with three notches 12 is arranged in the same phase in the circumferential direction. The method of incorporating the fixing plate 11 provided with the three latching | locking parts 16 is mentioned.
According to this method, the number of the notches 12 and the locking portions 16 are the same, and their phases are also matched, so that the three locking portions 16 get over the three notches 12 at the same time. As a result, the outer ring 102 and the fixed plate 11 can be smoothly assembled by being pressed in a parallel state.
If the number of notches 12 and the number of locking portions 16 are different, for example, the outer ring 102 having one notch 12 and the fixing plate 11 having three locking portions 16 may be combined. For example, there is a method in which two locking portions 16 are locked in the locking groove 109 in advance, and the remaining one locking portion 16 is pressed into the notch 12 and incorporated.

  Further, the shape of the notch 12 may be a concave curved surface shape as in the first modified example shown in FIG. 16, or may be a planar shape as in the second modified example shown in FIG. Good.

  The configurations of the inner ring, the outer ring, the rolling element, the rolling bearing, the fixed plate, the locking groove, the locking part, the small diameter step part, and the like 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-described embodiment, the case where the three locking portions 16 are formed on the inner peripheral portion of the fixed plate 11 is illustrated, but the present invention is not limited to this. A stop 16 may be formed.
Moreover, although the case where the locking groove 109 was formed in the circumferential direction of the outer peripheral surface of the small diameter step part 106 was illustrated in the said embodiment, it is not limited to this, For example, the outer peripheral surface of the small diameter step part 106 is shown. Locking grooves extending in the circumferential direction may be formed at a plurality of locations.

DESCRIPTION OF SYMBOLS 10 Bearing apparatus 11 Fixed plate 12 Notch 13 Circular hole part 14 Preliminary hole 16 Locking part 17 Shear surface 18 Fracture surface 19 Insertion hole 20 Recessed part 21 Thin part 102 Outer ring 106 Small diameter step part 106a Outer peripheral surface 106b Edge part 109 Locking groove

Claims (5)

A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a fixing having a circular hole fitted to the outer peripheral surface of the outer ring of the rolling bearing so as to fix the rolling bearing to the housing A bearing device comprising: a plate;
A small-diameter step portion to which the fixing plate is fitted is provided on the outer peripheral portion of the end portion of the outer ring, and a locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small-diameter step portion,
On the outer peripheral surface of the small-diameter step portion, a first flat portion is provided on the inner side in the axial direction with respect to the locking groove, and a second flat portion is provided on the outer side in the axial direction.
In the circular hole portion of the fixing plate, a plurality of locking portions that protrude radially inward and are formed using a press punching process are provided,
The inner peripheral surface of the circular hole portion of the fixed plate has a crushing surface and a punching surface, and the locking portion is provided on the punching surface,
On the inner peripheral surface of the circular hole portion of the fixing plate, a recess is formed around the locking portion,
The locking portion is moved over the outer peripheral surface from the end of the outer ring to the locking groove while being elastically deformed or plastically deformed, and locked to the locking groove ,
A radial clearance between the locking portion and the locking groove is A, a radial clearance between the second flat surface portion and the crushing surface is B, and the first flat surface portion and the punching processing are performed. A bearing device characterized by satisfying A> B, A> C, and B> C, where C is a clearance in a radial direction with respect to the surface . The fixing plate is bearing device according to claim 1, characterized in that it comprises the recess in a plurality positions of the inner peripheral portion of the locations including the locking portion facing the axial end surface of the cylindrical portion. The locking portion is, the a press punching process of the fixing plate, according to claim 1 or claims characterized in that it is formed by using the step of folding the inner peripheral portion of the press-stamped the fixed plate in the axial direction Item 3. The bearing device according to Item 2 . At the end near the outer peripheral surface of the cylindrical portion of the outer ring, at least one portion of the locking portion in the circumferential direction in phase, any one of claims 1 to 3, characterized in that it has a notch 2. A bearing device according to item 1. A rolling bearing in which a plurality of rolling elements are disposed between an inner ring and an outer ring, and a fixing having a circular hole fitted to the outer peripheral surface of the outer ring of the rolling bearing so as to fix the rolling bearing to the housing An assembly method of a bearing device comprising a plate,
A small-diameter step portion to which the fixing plate is fitted is provided on the outer peripheral portion of the end portion of the outer ring, and a locking groove extending in the circumferential direction is formed on the outer peripheral surface of the small-diameter step portion,
On the outer peripheral surface of the small diameter step portion, a first flat portion is provided on the axially inner side with respect to the locking groove, and a second flat portion is provided on the outer side in the axial direction.
In the circular hole portion of the fixed plate, each projecting radially inward and forming a plurality of locking portions formed using a press punching process,
The inner peripheral surface of the circular hole portion of the fixed plate has a crushing surface and a punching surface, and the locking portion is provided on the punching surface,
Forming a recess around the locking portion on the inner peripheral surface of the circular hole of the fixed plate;
The locking portion is moved over the outer peripheral surface from the end of the outer ring to the locking groove while being elastically deformed or plastically deformed, and is locked in the locking groove ,
A radial clearance between the locking portion and the locking groove is A, a radial clearance between the second flat surface portion and the crushing surface is B, and the first flat surface portion and the punching processing are performed. A bearing device assembling method characterized by satisfying A> B, A> C, and B> C, where C is a clearance in a radial direction with respect to the surface .

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