JP6561522B2 - Bearing device, fixing plate for bearing device, and manufacturing method of bearing device - Google Patents

Description

  The present invention relates to a bearing device, a fixing plate for the bearing device, and a method for manufacturing the bearing device, and more specifically, for example, a bearing device used for a rotation support portion such as a gear in a transmission or a differential gear device, and fixing for the bearing device. The present invention relates to a method for manufacturing a plate and a bearing device.

  Conventionally, a bearing that supports a rotating shaft provided with a pulley, a gear, and the like of an automobile transmission is firmly fixed to the housing by being sandwiched between the housing and a fixing plate that is fixed to the housing by a bolt (for example, Patent Documents 1 and 2).

  FIG. 16 shows an example of a conventionally known bearing device 100. The end of the rotating shaft 101 is rotatably supported by the housing 103 via a radial rolling bearing 102. The radial rolling bearing 102 includes a plurality of outer rings 105 having an outer ring raceway 104 on an inner peripheral surface, an inner ring 107 having an inner ring raceway 106 on an outer peripheral surface, and a plurality of rolls provided between the outer ring raceway 104 and the inner ring raceway 106. The ball 108 is provided. The outer ring 105 of the radial rolling bearing 102 is fitted in a holding recess 109 formed in the housing 103. The fixing plate 110 is fitted on a small diameter step 112 having a fitting hole 113 formed on the outer peripheral surface of one end of the outer ring 105 in the axial direction. Further, the fixing plate 110 is fixed to the housing 103 by a plurality of screws respectively inserted through the plurality of through holes 114 (see FIG. 17) to prevent the outer ring 105 from coming out of the holding recess 109.

  Incidentally, as shown in FIGS. 17 and 18, the conventional fixing plate 110 is fixed to the housing 103 by screws inserted through three through holes 114 formed at equal intervals in the circumferential direction. With the tightening, the pressing force applied from the fixing plate 110 to the step surface 115 of the small-diameter step portion 112 of the outer ring 105 becomes nonuniform in the circumferential direction. Specifically, the pressing force applied to the step surface 115 is large in the portion close to the through hole 114, and the pressing force applied to the step surface 115 decreases as the distance from the through hole 114 increases. As described above, when the pressing force applied to the step surface 115 of the outer ring 105 becomes non-uniform in the circumferential direction, the outer ring 105 may be distorted and the roundness of the outer ring raceway 104 may be impaired.

  In the bearing device described in Patent Document 1, in order to cope with the problem that the pressing force of the outer ring is not uniform in the circumferential direction, the radial direction of the through hole in the inner peripheral edge portion of the fitting hole formed in the fixed plate A large-diameter notch is formed in the inner part, and the periphery of the large-diameter notch is positioned radially outward from the outer peripheral surface of the outer ring. Is almost uniform and prevents the roundness of the outer ring from deteriorating.

JP 2012-132495 A JP 2010-249214 A

  However, in the bearing device described in Patent Document 1, since the large-diameter cutout portion is provided in the fitting hole of the fixing plate that is fitted to the outer ring, the fitting hole is not circular. On the other hand, the fitting hole of the fixed plate forms a guide surface with the outer ring, and high positional accuracy is required in assembling with the outer ring. Therefore, it is desirable to ensure a circle as much as possible.

  The present invention has been made in view of the above-described problems, and its object is to influence the roundness of the outer ring raceway while ensuring a sufficient guide surface with the outer ring in the fitting hole of the fixed plate. It is another object of the present invention to provide a bearing device, a bearing device fixing plate, and a method of manufacturing the bearing device that can securely fix the outer ring to the housing.

The above object of the present invention can be achieved by the following constitution.
(1) a rolling bearing comprising an inner ring, an outer ring, and a plurality of rolling elements disposed between the inner and outer rings;
A substantially circular hole, and a plurality of mounting holes through which the respective fastening members are inserted or screwed around the substantially circular hole, and a fixing plate that contacts the outer ring in the axial direction;
With
The rolling ring is fixed to the housing via the fixing plate by fitting the outer ring to the housing and fixing the fixing plate to the housing by tightening the fastening members.
The abutment surface of the outer ring with which the fixed plate abuts in the axial direction is a bearing device that is located on the outside in the axial direction by a predetermined distance from the facing surface of the housing with which the fixed plate faces.
The fixing plate includes a protruding portion that protrudes toward the housing at a position facing the housing and has a lower rigidity than a portion that contacts the outer ring of the fixing plate,
The projecting portion is constituted by an elastic member provided separately from the fixed plate, contacts the housing before fastening of the fastening members, and is elastically deformed by fastening of the fastening members. A bearing device.
(2) The bearing device according to (1), wherein the protrusion is provided on a radially outer side than a virtual circle connecting centers of the plurality of mounting holes.
(3) a rolling bearing comprising an inner ring, an outer ring, and a plurality of rolling elements disposed between the inner and outer rings;
A substantially circular hole, and a plurality of mounting holes through which the respective fastening members are inserted or screwed around the substantially circular hole, and a fixing plate that contacts the outer ring in the axial direction;
With
Fitting the outer ring to the housing;
Fixing the fixing plate to the housing by fastening the fastening members, so that the rolling bearing is fixed to the housing via the fixing plate;
Have
The contact surface of the outer ring with which the fixed plate abuts in the axial direction is a manufacturing method of a bearing device that is positioned axially outside by a predetermined distance from the facing surface of the housing with which the fixed plate faces.
The fixing plate includes a protruding portion that protrudes toward the housing at a position facing the housing and has a lower rigidity than a portion that contacts the outer ring of the fixing plate,
The protrusion is in contact with the housing before the fastening members are tightened, and is elastically deformed by the fastening of the fastening members.
The protrusion is constituted by an elastic member provided separately from the fixed plate,
Measuring the axial length between the axial end surface of the outer ring and the abutment surface, and the axial length of the holding recess of the housing fitted to the outer ring;
Selecting the elastic member based on the predetermined distance obtained by the measuring step;
A method for manufacturing a bearing device, further comprising:
(4) having a substantially circular hole, and a plurality of mounting holes for inserting or screwing each fastening member around the substantially circular hole,
Abuts the outer ring of the rolling bearing in the axial direction, and
In the state in which the outer ring is fitted to the housing, it is fixed to the housing by tightening the fastening members, thereby fixing the rolling bearing to the housing.
A protrusion projecting toward the housing at a position facing the housing and having a lower rigidity than a portion of the fixing plate that contacts the outer ring;
The projecting portion is constituted by an elastic member provided separately from the fixed plate, contacts the housing before fastening of the fastening members, and is elastically deformed by fastening of the fastening members. A fixed plate for a bearing device.

According to the bearing device and the fixing plate for a bearing device of the present invention, the fixing plate includes a protruding portion that protrudes toward the housing at a position facing the housing and has rigidity lower than that of a portion that contacts the outer ring of the fixing plate. The protrusion comes into contact with the housing before each fastening member is tightened, and is elastically deformed by tightening each fastening member. Therefore, when the fixing plate is fixed to the housing by each fastening member, the protruding portion can suppress deformation of the fixing plate. As a result, the influence of the deformation of the fixed plate on the roundness of the outer ring raceway can be suppressed, and the roundness of the outer ring raceway can be maintained well.
Further, since the protrusion is constituted by an elastic member provided separately from the fixed plate, even if the tolerance of the axial length of the housing or the bearing is relaxed, the elastic member is elastically deformed to cause the relaxation. The influence of the gap on the roundness collapse can be suppressed. That is, the tolerance in the bearing width direction and the axial tolerance on the housing side can be relaxed, the manufacturing cost can be reduced, and the yield can be improved.

  According to the method for manufacturing a bearing device of the present invention, in the above-described bearing device, the protrusion is configured by an elastic member provided separately from the fixed plate, and the axial end surface of the outer ring is in contact with the fixed plate. The elastic member is selected based on the step of measuring the axial length between the surface and the axial length of the holding recess of the housing fitted with the outer ring, and the predetermined distance obtained by the measuring step. And a process. Thereby, it is possible to obtain a uniform roundness-suppressing effect regardless of variations in product accuracy.

(A) is the perspective view which looked at the bearing apparatus based on 1st Embodiment of this invention from the front side, (b) is a perspective view of a fixed plate. It is a front view of the bearing apparatus of FIG. (A) is sectional drawing of the bearing apparatus of FIG. 1, (b) is a principal part expanded sectional view of (a). It is a principal part expanded sectional view which shows the dimensional relationship of the bearing apparatus and housing in the state in which the outer ring | wheel of the bearing apparatus before each fastening member was fastened was fitted by the housing. (A) is a principal part expanded sectional view which shows the state by which the outer ring | wheel of the bearing device before each fastening member was fastened was fitted by the housing, (b) is each fastening member fastened, and a bearing device is fixed to the housing. It is a principal part expanded sectional view which shows the state. It is a principal part expanded sectional view which shows the state after the conventional bearing apparatus was fixed to the housing. It is a figure similar to FIG.5 (b) which showed the screw thread. It is a figure similar to FIG. 6 which showed the screw thread. It is a principal part enlarged view of FIG. (A) is a principal part expanded sectional view of the bearing apparatus which concerns on the 1st modification of 1st Embodiment, (b) is a principal part expanded sectional view of the bearing apparatus which concerns on the 2nd modification of 1st Embodiment, (c) ) Is an enlarged cross-sectional view of a main part of a bearing device according to a third modification of the first embodiment. (A) is a perspective view of the fixed plate which concerns on the 4th modification of 1st Embodiment, (b) is a front view of (a). It is sectional drawing of the fixing plate of FIG. (A) is an important section expanded sectional view of a bearing device concerning a 2nd embodiment of the present invention, and (b) is an XI section expanded sectional view of (a). It is a figure for demonstrating an example of the manufacturing method of the bearing apparatus which concerns on 3rd Embodiment of this invention. It is a figure for demonstrating the other example of the manufacturing method of the bearing apparatus which concerns on 3rd Embodiment of this invention. It is a fragmentary sectional view showing one example of the conventional bearing device. It is a perspective view of the bearing apparatus shown in FIG. It is sectional drawing of the bearing apparatus shown in FIG.

  Hereinafter, a bearing device, a fixing plate for a bearing device, and a manufacturing method of the bearing device according to each embodiment of the present invention will be described in detail based on the drawings.

(First embodiment)
First, with reference to FIGS. 1-5, the bearing apparatus which concerns on 1st Embodiment of this invention, the fixing plate for bearing apparatuses, and the manufacturing method of a bearing apparatus are demonstrated. The bearing device 10 includes a radial rolling bearing 30 and a fixed plate 40 that fixes the radial rolling bearing 30 to the housing 20. The radial rolling bearing 30 and the fixed plate 40 of this embodiment are assembled in a non-separable manner as will be described later.

  As shown in FIG. 3, the radial rolling bearing 30 is fitted into the holding recess 21 of the housing 20, is fitted to an outer ring 31 having an outer ring raceway 32 on the inner circumferential surface, and a rotary shaft (not shown), and the inner ring is fitted to the outer circumferential surface. An inner ring 33 having a track 34 and a ball 35 which is a plurality of rolling elements held by a retainer 36 and disposed between the outer ring track 32 and the inner ring track 34 so as to roll freely. An outer peripheral portion of one end portion in the axial direction of the outer ring 31 includes a step outer peripheral surface 37a having a diameter smaller than the outer diameter of the outer ring 31 and a step surface (contact surface) 37b extending radially outward from the step outer peripheral surface 37a. A small diameter step portion 37 is formed. On the outer circumferential surface 37a of the step portion, an engagement groove 37c is formed along the entire circumference in the circumferential direction. In addition, sealing members 38 are disposed between the outer ring 31 and the inner ring 33 at both axial ends of the outer ring 31 to seal the radial rolling bearing 30.

  As shown in FIGS. 1 and 2, the fixed plate 40 is a substantially hexagonal plate-like member in which short sides 40a and long sides 40b are alternately arranged in the circumferential direction, and an outer ring 31 is fitted in the center. A fitting hole 41 is formed. In addition, boss portions 42 are respectively formed at three circumferentially equal intervals corresponding to the short side 40a. As shown in FIGS. 4 and 5, the boss portion 42 is formed with a female screw 43 (attachment hole) into which the male screw 13 of the bolt (fastening member) 12 is screwed. In addition, in FIGS. 1-5, the screw thread of the external thread 13 and the internal thread 43 is abbreviate | omitting illustration.

In the bearing device 10, after the small-diameter step portion 37 of the outer ring 31 is fitted in the fitting hole 41 of the fixed plate 40, the peripheral portion of the fitting hole 41 is crushed and protruded radially inward by a plurality of processes. The crushing portion 48 is formed (see FIG. 1B), and the plurality of crushing portions 48 are engaged with the engaging grooves 37c formed on the outer peripheral surface 37a of the stepped portion, whereby the radial rolling bearing 30 and the fixed plate 40 are Are assembled in a non-separable and relatively rotatable state.
In the fitting hole 41, an escape portion 48a for processing is formed around each crushing portion 48. Therefore, the fitting hole 41 of the present embodiment is a substantially circular hole in which the remaining inner peripheral surface excluding each crushing portion 48 and the relief portion 48a is formed by a single circle.
Further, the angle range α (see FIG. 11) of each relief portion 48a from the center of the fitting hole is set to α ≦ 30 °, preferably α ≦ 25 °. This angle range α is similarly applicable in the following embodiments.

  4 and 5, the bearing device 10 that is not separated is provided in the housing 20 after the outer ring 31 of the radial rolling bearing 30 is fitted in the holding recess 21 formed in the housing 20. The male screw 13 of the bolt 12 inserted into the screw hole 22 is screwed into the female screw 43 of the fixing plate 40 and tightened to be fixed to the housing 20. Therefore, the outer ring 31 is sandwiched between the housing 20 and the fixed plate 40, and the radial rolling bearing 30 is prevented from coming out of the holding recess 21 of the housing 20.

  Here, in order to securely clamp the outer ring 31 between the housing 20 and the fixed plate 40, when the outer ring 31 is fitted into the holding recess 21 of the housing 20, the outer ring 31 is placed between the opposing surfaces of the housing 20 and the fixed plate 40. The housing 20 and the bearing device 10 need to be formed so that an axial clearance is ensured. That is, as shown in FIG. 4, the housing 20 and the outer ring 31 are different in level between the outer ring 31 with which the fixing plate 40 abuts in the axial direction when the outer ring 31 is abutted against the axial end surface of the holding recess 21 of the housing 20. The surface 37b is located on the outer side in the axial direction by a predetermined distance H from the side surface 23 of the housing 20 to which the fixed plate 40 faces.

  Therefore, in the present embodiment, when the fixing plate 40 is fixed to the housing 20 with the bolts 12, the outermost diameter of the fixing plate 40 is suppressed in order to suppress displacement of the fixing plate 40 due to the bolt axial force of the bolts 12, that is, collapse. The three elastic members 60 constituting the protrusion 45 are attached to the edge of the short side 40a of the fixed plate 40, which is the position.

  As shown in FIG. 2, the three elastic members 60 constituting the protrusion 45 are arranged on the radially outer side than the virtual circle VC connecting the centers O2 of the three boss portions 42. Specifically, each elastic member 60 is extended radially outward from the boss portion 42 on the extension line L that connects the center O1 of the fitting hole 41 of the fixing plate 40 and the center O2 of the boss portion 42. They are arranged symmetrically with respect to the line.

  Each elastic member 60 of the present embodiment is configured separately from the fixed plate 40 by a metal leaf spring bent into a substantially U-shaped cross section by press molding, and a part that contacts the outer ring 31 of the fixed plate 40. Less rigid. Therefore, as shown in FIG. 4, the elastic member 60 protrudes toward the housing 20 formed by bending the flat portion 63 in contact with the edge portion of the fixed plate 40 and bending both sides of the flat portion 63 substantially vertically. And a flat portion 64 that contacts the back surface 46 of the fixing plate 40.

  Further, each elastic member 60 has its both ends 61 and 62 respectively engaged with notches 49 and 50 formed on the front surface 44 and the back surface 46 around the edge of the fixing plate 40 and substantially parallel to the short side 40a. These are attached to the fixed plate 40 by being sandwiched from both sides of the front surface 44 and the back surface 46.

  The fixing plate 40 is attached by hooking the back surface side end portion 61 to the back surface side cutout portion 49 and elastically deforming the front surface side end portion 62 while moving over the surface 44 of the fixing plate 40 to make the front surface side cutout portion. Alternatively, the elastic member 60 may be pressed radially inward, and both end portions 61 and 62 may be incorporated at the same time to engage with the cutout portions 49 and 50.

  Therefore, the elastic member 60 is attached to the fixed plate 40 in a non-separable manner using elastic deformation, and an axial gap is secured between the protrusion 45 and the surface 44 of the fixed plate 40.

  Further, the elastic member 60 is formed so as to suppress an axial backlash and a radial backlash with respect to the fixed plate 40.

  That is, the end of the flat portion 64 is bent inward so that the length of the flat portion 64 matches the length from the edge of the fixed plate 40 to the outer surface of the back-side notch 49, and the back-side end 61 Is formed. Therefore, the elastic member 60 has a radial portion of the elastic member 60 with respect to the fixed plate 40 by the flat portion 63 contacting the edge of the fixed plate 40 and the back surface side end portion 61 contacting the outer surface of the back notch 49. Is suppressed.

  Further, the front surface side end portion 62 of the elastic member 60 is bent and bent so that the front end portion faces the side surface 23 of the housing 20, and the curved portion is in contact with the bottom surface of the front surface side notch portion 50. Therefore, the elastic member 60 has the flat portion 64 in contact with the back surface 46 of the fixing plate 40 and the curved portion of the front surface side end portion 62 in contact with the bottom surface of the front surface notch portion 50, thereby Axial play is suppressed.

The length J from the surface 44 of the fixing plate 40 to the end face of the protrusion 45 is set to be larger than a predetermined distance H from the side surface 23 of the housing 20 to the step surface 37b of the outer ring 31 (J> H). Therefore, when the axial force of the bolt 12 enters and the surface 44 of the fixing plate 40 comes into contact with the stepped surface 37b of the outer ring 31, the protrusion 45 is elastically deformed.
The dimensional difference between the length J and the predetermined distance H is arbitrarily set depending on the material and shape of the elastic member 60 to be used.

Further, the diameter φA connecting the contact portions between the front surface side end 62 of each elastic member 60 and the bottom surface of each front surface side notch 50 and the diameter connecting the inner surface of each back surface side notch 49 of the fixing plate 40. In order to ensure the rigidity of the backup surface of the fixed plate 40, it is preferable that φB> φA.
Further, the back surface 46 of the fixing plate 40 has a portion radially outward from each back-side cutout portion 49 so that the flat portion 64 of the elastic member 60 in contact with the portion does not protrude from the back surface 46. ing.

  In the bearing device 10 configured as described above, first, as shown in FIG. 5A, the outer ring 31 is held in the holding recess of the housing 20 while the screw hole 22 of the housing 20 and the female screw 43 of the fixing plate 40 are phase-matched. 21 is fitted. Thus, before the bolts 12 are tightened, the protrusion 45 is already in contact with the side surface 23 of the housing 20 and the gap is zero.

  Then, as shown in FIG. 5B, when the male screw 13 of the bolt 12 starts to be fastened to the female screw 43, the protrusion 45 is elastically deformed before the fixing plate 40 is deformed. When the bolt 12 is fastened to the female screw 43, the fixing plate 40 tends to bend and deform in the direction of the arrow F by the axial force of the bolt 12, but the protrusion 45 pushes back the force in the F direction. The amount of deformation of the fixed plate 40 can be suppressed.

  That is, as shown in FIG. 6, in the conventional bearing device 100 having no protrusion, when the male screw 123 of the bolt 122 is fastened to the female screw 121 of the fixing plate 110, the fixing plate 110 is solid from the position indicated by the broken line in the figure. As shown by, the fixed plate 110 is deformed so as to fall toward the housing 103. At this time, since a force acts on the outer ring 105 in the direction indicated by the arrow A, the outer ring raceway 104 compressed to the inner diameter side by the radial component of this force may be locally deformed.

  On the other hand, according to the bearing device 10 of the present embodiment, as shown in FIG. 5B, when the male screw 13 of the bolt 12 is fastened to the female screw 43, the protrusion 45 of the fixing plate 40 is elastically deformed. Thus, the tilting of the fixing plate 40 is suppressed, and the force in the direction indicated by the arrow B acting on the outer ring 105 (substantially axial force) is supported by the housing 20. Accordingly, the tensile stress (strain) acting on the fixed plate 40 is suppressed, and local concentrated stress that causes the roundness of the outer ring raceway 32 to be lost can be suppressed. 32 is prevented.

  That is, the biasing force of the outer ring 31 due to the fixing plate 40 due to the tightening of the bolt 12 hardly occurs, the deformation of the outer ring raceway 32 is suppressed, and the roundness is maintained. Thereby, the rolling contact state between the outer ring raceway 32 and the balls 35 is properly maintained, and vibrations of the rotating shaft and the like, and deterioration of the durability of the radial rolling bearing 30 can be prevented.

Therefore, even in the conventional bearing device 100 in which no elastic member is mounted, if the tolerance of the axial length of the housing 20 or the bearing is strict (the predetermined gap H is small and variation is small), the roundness The required life can be satisfied by reducing the decrease in life due to collapse. However, in this case, the manufacturing cost becomes high, and the defect rate at the time of manufacturing may increase.
On the other hand, in the bearing device 10 of the present embodiment, even if the tolerance of the axial length of the housing 20 or the bearing is relaxed (the predetermined gap H is large and the variation is large), the gap H is reduced by providing the elastic member 60. The influence on the roundness collapse can be suppressed (the elastic deformation of the elastic member 60 absorbs the variation in the gap H). That is, the bearing device 10 of the present embodiment can alleviate the tolerance in the bearing width direction and the axial tolerance on the housing side, thereby reducing the manufacturing cost and improving the yield.

  Further, in the present embodiment, since the falling of the fixed plate 40 is suppressed as described above, the contact area between the fixed plate 40 and the step surface 37b of the small diameter step portion 37 is increased. Therefore, the fixing plate 40 can press the outer ring 31 in the axial direction with a wider surface, and the pressing force can be prevented from escaping in the radial direction. As a result, even when vibration is transmitted to the outer ring 31 from the pulley or shaft of the belt CVT, the outer ring 31 can be prevented from being displaced, and the vibration damping performance of the bearing device 10 can be improved. is there.

  Further, as shown in FIG. 7, in this embodiment, since the falling of the fixing plate 40 is suppressed as described above, the misalignment between the male screw 13 of the bolt 12 and the female screw 43 of the boss portion 42 of the fixing plate 40. Is suppressed. As a result, the threads of the male screw 13 and the female screw 43 mesh substantially uniformly over the entire circumference, reducing the burden on the mountain. As a result, the strength of the threads of the male screw 13 and the female screw 43 is relatively improved.

  On the other hand, as shown in FIGS. 8 and 9, in the conventional bearing device 100 that does not have the protrusion 45 (elastic member 60), the fixed plate 110 falls toward the housing 103. In this case, a gap is generated at some locations (locations indicated by B and C in the drawing) in meshing between the thread of the male screw 123 of the bolt 122 and the thread of the female screw 121 of the fixing plate 110. As a result, a bolt axial force is generated at the thread of the meshing portion where no gap is generated, and the burden of a single mountain is increased. In the worst case, the threads of the male screw 13 and the female screw 43 may be sheared.

  In addition, the fitting hole 41 of the fixed plate 40 according to the present embodiment has no large cutouts or protrusions and is mostly formed in an arc, so that the fitting ring 41 is formed on the entire circumference of the small-diameter stepped portion 37 of the outer ring 31. The fixing plate 40 and the outer ring 31 can be fitted with high positional accuracy.

  In the bearing device 10 of this embodiment, in order to prevent interference between the boss portion 42 of the fixed plate 40 and the housing 20, a relief portion 24 (radial relief portion) is formed in the screw hole 22 of the housing 20. Yes. Here, from the viewpoint of ensuring the backup strength of the bearing and insufficient strength of the housing, the housing 20 and the fixed plate 40 are separated in the axial direction without forming the large relief portion 24 to prevent the interference therebetween. Even in this case, it is particularly effective to suppress the falling of the fixing plate 40 by the protrusion 45 (see FIG. 4).

  As described above, according to the bearing device 10, the bearing device fixing plate 40, and the manufacturing method of the bearing device 10 according to the present embodiment, the fixing plate 40 faces the housing 20 at a position facing the housing 20. A protrusion 45 that protrudes and has a lower rigidity than a portion that contacts the outer ring 31 of the fixing plate 40 is provided. The protrusion 45 comes into contact with the housing 20 before each bolt 12 is tightened, and is elastic by tightening each bolt 12. Deform. Therefore, when the fixing plate 40 is fixed to the housing 20 by each bolt 12, the protrusion 45 can suppress deformation of the fixing plate 40. Thereby, the influence of the deformation of the fixed plate 40 on the roundness of the outer ring raceway 32 can be suppressed, and the roundness of the outer ring raceway 32 can be maintained well.

  Moreover, since the fitting hole 41 of the fixing plate 40 into which the outer ring 31 is fitted is substantially circular, the outer ring 31 and the fixing plate 40 can be assembled with high positional accuracy.

  Further, since the protrusion 45 is provided radially outside the virtual circle VC connecting the centers O2 of the plurality of boss portions 42, the fixing plate 40 collapses when the fixing plate 40 is fixed to the housing 20 by each bolt 12. Can be efficiently suppressed.

  Furthermore, since the protrusion 45 is provided separately from the fixed plate 40 and is configured by the elastic member 60 having a rigidity lower than that of the fixed plate 40, the protrusion 45 that suppresses deformation of the fixed plate 40 can be simply configured. Can do.

As shown in FIG. 10A, in the bearing device according to the first modified example of the present embodiment, the protrusion 45a of each elastic member 60A approaches the surface 44 of the fixed plate 40 toward the outer diameter side. Are tapered at an angle θ. Therefore, before the bolt 12 is tightened, the protrusion 45 contacts on the inner diameter side. Then, as the bolt axial force is increased by tightening the bolt 12, the fixing plate 40 tends to be displaced so as to fall toward the housing side as indicated by an arrow C, but the protrusion 45 has a contact surface with the housing 20. To prevent the fixed plate 40 from falling.
Thereby, according to this modification, even in the housing 20 that is often low in rigidity such as an aluminum material, the burden on the housing 20 can be reduced, and the load of the elastic member 60A itself is also uniform, and resistance to deformation load. Can be improved.
Note that the protrusion 45a may have an arc shape instead of the taper shape as long as it approaches the surface 44 of the fixed plate 40 toward the outer diameter side.

  In addition, each of the protrusions 45 of the above embodiment is configured by elastic members 60 and 60A obtained by press-molding a metal material. However, like the protrusions 45b and 45c shown in FIGS. Alternatively, the elastic members 60B and 60C may be made of rubber or elastic resin.

  That is, in the second modification shown in FIG. 10B, each elastic member 60B is formed by injection molding rubber or elastic resin, and both inward ends of each elastic member 60B that is injection molded. The elastic members 60 </ b> B are attached to the fixed plate 40 by fitting the portions 61 and 62 into the notches 49 and 50 of the fixed plate 40. Further, in the third modification shown in FIG. 10C, each elastic member 60C is integrally formed with the fixing plate 40 by filling and fixing the resin made of rubber or elasticity to the fixing plate 40.

  FIGS. 11 and 12 relate to a bearing device according to a fourth modified example of the present embodiment, and are provided by the fixing plate 40 itself so that the protrusion 45d has a lower rigidity than the portion that contacts the outer ring 31 of the fixing plate 40. It is done. The protrusion 45d of the present modification is formed to extend further radially outward from the edge of each short side 40a, and gradually becomes thinner toward the tip, and the tip protrudes beyond the surface 44 of the fixed plate 40. To do.

  In this case, the Young's modulus is determined by the material of the fixed plate 40, and the shape of each protrusion 45d is changed, for example, the width of the protrusion 45d is changed, the thickness of the tip of the protrusion 45d is changed, or the protrusion 45d By changing the shape of the root portion, the spring constant is adjusted.

  Therefore, according to the fourth modified example, the protrusion 45d has a lower rigidity than a portion that contacts the outer ring 31 of the fixing plate 40 (for example, a portion around the fitting hole 41 having a uniform axial thickness). In addition, since the fixing plate 40 is provided, the protrusion 45d can be formed without increasing the number of parts.

(Second Embodiment)
Next, a bearing device, a bearing device fixing plate, and a bearing device manufacturing method according to a second embodiment of the present invention will be described with reference to FIG. In the bearing device 10A of the present embodiment, a stopper plate, that is, the rolling bearing 30 is used instead of the retainer plate of the first embodiment, that is, the fixed plate 40 that is not separated from the rolling bearing 30 and is assembled in a relatively rotatable state. The fixed plate 40A in a separated state is used. For this reason, the outer ring 31 of the rolling bearing 30 is not provided with a small-diameter stepped portion or a locking groove, and the substantially circular hole 41a of the fixed plate 40A is not provided with a crushing portion or a relief portion.

  Also in this embodiment, when the outer ring 31 is fitted into the housing 20, the contact surface 31a of the outer ring 31 with which the fixed plate 40A contacts in the axial direction is the opposite surface (side surface 23) of the housing 20 with which the fixed plate 40A is opposed. It is located outside in the axial direction by a predetermined distance H. Thereafter, the screw hole 22 of the housing 20 and the female screw 43 of the fixing plate 40A are phase-matched to bring the fixing plate 40A into contact with the outer ring 31 in the axial direction, and the protrusion 45 is brought into contact with the side surface 23 of the housing 20. Then, by fixing the fixing plate 40 to the housing 20 by tightening each bolt 12, the rolling bearing 30 is fixed to the housing 20 via the fixing plate 40.

Therefore, also in the present embodiment, the fixed plate 40A includes the protruding portion 45 that protrudes toward the housing 20 at a position facing the housing 20 and has a rigidity lower than that of the portion that contacts the outer ring 31 of the fixed plate 40. The portion 45 is in contact with the housing 20 before the bolts 12 are tightened, and is elastically deformed by the tightening of the bolts 12. Therefore, when the fixing plate 40 is fixed to the housing 20 by each bolt 12, the protrusion 45 can suppress deformation of the fixing plate 40A. Thereby, the influence of the deformation of the fixed plate 40A on the roundness of the outer ring raceway can be suppressed, and the roundness of the outer ring raceway can be maintained well.
Other configurations and operations are the same as those in the first embodiment.
In the present embodiment, the configuration of the protrusion 45 is not limited to the above, and the first to fourth modifications of the first embodiment can be applied.

(Third embodiment)
Next, a bearing device manufacturing method according to a third embodiment of the present invention will be described with reference to FIGS.
In the bearing device 10 of the first embodiment, the predetermined distance H (see FIG. 4) from the side surface 23 of the housing 20 to the step surface 37b of the outer ring 31 varies due to variations in axial accuracy of the housing 20 and the outer ring 31. If the predetermined distance H is small, the roundness is difficult to collapse, and if the predetermined distance H is large, the roundness is easily collapsed. The variation in the distance H changes the roundness suppression effect.

  For this reason, in the manufacturing method of the bearing device of the present embodiment, when the protrusion 45 is configured by the elastic member 60 provided separately from the fixed plate 40, the shape is different, that is, the fixed plate 40 A plurality of elastic members 60 having different lengths J from the surface 44 to the end face of the protrusion 45 are prepared. When the transmission is assembled, the axial length B1 between the axial end surface of the outer ring 31 and the stepped surface 37b and the axial length A1 of the holding recess 21 of the housing 20 fitted to the outer ring 31 are measured. To do. Then, on the assembly line, the elastic member 60 is selected from the plurality of elastic members 60 having different shapes based on the predetermined distance H obtained by the measurement process, and is attached to the fixed plate 40. Regardless of the accuracy variation, it is possible to expect a uniform roundness suppression effect.

  In the bearing device 10A of the second embodiment, the predetermined distance H (see FIG. 13B) from the side surface 23 of the housing 20 to the contact surface 31a of the outer ring 31 is the axial direction of the housing 20 and the outer ring 31. Variations due to variations in accuracy. Therefore, as shown in FIG. 15, when the transmission is assembled, the axial length B2 between the axially opposite end faces of the outer ring 31 and the axial length A2 of the holding recess 21 of the housing 20 that fits with the outer ring 31. Measure each. Then, on the assembly line, the elastic member 60 is selected from the plurality of elastic members 60 having different shapes based on the predetermined distance H obtained by the measurement process, and is attached to the fixed plate 40A. Regardless of the accuracy variation, it is possible to expect a uniform roundness suppression effect.

  Note that the present invention is not limited to the above-described embodiments and modifications, and modifications, improvements, and the like can be made as appropriate.

  For example, the number of elastic members is not limited to three in the present embodiment, and can be arbitrarily set according to the shape of the plate. However, as in this embodiment, the number of elastic members preferably corresponds to the number of attachment holes in the fastening member.

10, 10A Bearing device 12 Bolt (fastening member)
13 Male thread 20 Housing 30 Rolling bearing 31 Outer ring 33 Inner ring 35 Ball (rolling element)
37 Small-diameter stepped portion 37a Stepped portion outer peripheral surface 37b Stepped surface 40, 40A Fixing plate 41 Fitting hole (substantially circular hole)
42 Boss 43 Female thread (Mounting hole)
44 Housing side 45, 45a, 45b, 45c, 45d Protrusion 60, 60A, 60B, 60C Elastic member H Predetermined distance O2 Center of mounting hole VC Virtual circle

Claims (4)

A rolling bearing comprising an inner ring, an outer ring, and a plurality of rolling elements disposed between the inner and outer rings;
A substantially circular hole, and a plurality of mounting holes through which the respective fastening members are inserted or screwed around the substantially circular hole, and a fixing plate that contacts the outer ring in the axial direction;
With
The rolling ring is fixed to the housing via the fixing plate by fitting the outer ring to the housing and fixing the fixing plate to the housing by tightening the fastening members.
The abutment surface of the outer ring with which the fixed plate abuts in the axial direction is a bearing device that is located on the outside in the axial direction by a predetermined distance from the facing surface of the housing with which the fixed plate faces.
The fixing plate includes a protruding portion that protrudes toward the housing at a position facing the housing and has a lower rigidity than a portion that contacts the outer ring of the fixing plate,
The projecting portion is constituted by an elastic member provided separately from the fixed plate, contacts the housing before fastening of the fastening members, and is elastically deformed by fastening of the fastening members. A bearing device.   The bearing device according to claim 1, wherein the protrusion is provided on a radially outer side than a virtual circle connecting centers of the plurality of mounting holes. A rolling bearing comprising an inner ring, an outer ring, and a plurality of rolling elements disposed between the inner and outer rings;
A substantially circular hole, and a plurality of mounting holes through which the respective fastening members are inserted or screwed around the substantially circular hole, and a fixing plate that contacts the outer ring in the axial direction;
With
Fitting the outer ring to the housing;
Fixing the fixing plate to the housing by fastening the fastening members, so that the rolling bearing is fixed to the housing via the fixing plate;
Have
The contact surface of the outer ring with which the fixed plate abuts in the axial direction is a manufacturing method of a bearing device that is positioned axially outside by a predetermined distance from the facing surface of the housing with which the fixed plate faces.
The fixing plate includes a protruding portion that protrudes toward the housing at a position facing the housing and has a lower rigidity than a portion that contacts the outer ring of the fixing plate,
The protrusion is in contact with the housing before the fastening members are tightened, and is elastically deformed by the fastening of the fastening members.
The protrusion is constituted by an elastic member provided separately from the fixed plate,
Measuring the axial length between the axial end surface of the outer ring and the abutment surface, and the axial length of the holding recess of the housing fitted to the outer ring;
Selecting the elastic member based on the predetermined distance obtained by the measuring step;
A method for manufacturing a bearing device, further comprising: A substantially circular hole and a plurality of mounting holes through which the fastening members are inserted or screwed around the substantially circular hole,
Abuts the outer ring of the rolling bearing in the axial direction, and
In the state in which the outer ring is fitted to the housing, it is fixed to the housing by tightening the fastening members, thereby fixing the rolling bearing to the housing.
A protrusion projecting toward the housing at a position facing the housing and having a lower rigidity than a portion of the fixing plate that contacts the outer ring;
The projecting portion is constituted by an elastic member provided separately from the fixed plate, contacts the housing before fastening of the fastening members, and is elastically deformed by fastening of the fastening members. A fixed plate for a bearing device.

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