JP2007002946A - Rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing capable of suppressing vibration transmitted from an outer ring side to a housing side, sufficiently securing the rigidity of a bearing system, and increasing vibration-proofness. <P>SOLUTION: This rolling bearing 10 comprises an outer ring 11 having an outer ring raceway surface 11a on its inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on its outer peripheral surface, a plurality of rolling elements 13 rollingly interposed between the outer ring raceway surface 11a and the inner ring raceway surface 12a, and a vibration-proof layer 14 formed on at least the outer peripheral surface of the outer ring 11. A male screw part 15 is formed on the outer peripheral surface of the outer ring 11, a female screw part 16 corresponding to the male screw part 15 is formed on the inner peripheral surface of the vibration-proof layer 14, and the male screw part 15 of the outer ring 11 is threaded with the female screw part 16 of the vibration-proof layer 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rolling bearing provided with an anti-vibration layer, for example, a rolling bearing used for a rotation support portion such as a gear in an automobile transmission.

  Conventionally, in an automobile transmission, as shown in FIG. 43, in addition to a gear 1 such as an input shaft and an output shaft, a rotary shaft 2 having a transmission gear (not shown) is housed by a rolling bearing 3 such as a ball bearing. 4 is supported. The rolling bearing 3 is subjected to a required preload in order to improve rigidity and rotational accuracy. The rotary shaft 2 and the rolling bearing 3 are made of steel because required strength is required, and the housing 4 is made of aluminum alloy or the like for weight reduction.

  In the automobile transmission as described above, gear meshing vibrations caused by input / output torque fluctuations, gear backlash, etc., and vibrations such as rolling element passing vibrations of rolling bearings are generated by the gear 1 and the rotating shaft 2. And it will be transmitted to the housing 4 via the rolling bearing 3. As a result, for example, components such as the gear 1, the rotating shaft 2, the rolling bearing 3, and the housing 4 resonate to generate large vibrations, and vibration noise may be a problem.

  For this reason, by providing a groove in the outer peripheral surface of the outer ring of the rolling bearing or a part of the housing, placing a vibration absorbing material or an O-ring having elasticity in this groove, and press-fitting the outer peripheral surface of the outer ring into the inner diameter of the housing, Rolling bearings that prevent vibration from being transmitted from the rolling bearing to the housing are known (see, for example, Patent Documents 1 to 4).

  However, in the rolling bearings described in Patent Documents 1 to 4, since the vibration absorbing material and the O-ring are disposed in the outer ring outer peripheral surface of the rolling bearing or a groove formed in a part of the housing, a slight amount of the outer ring or housing of the rolling bearing is small. Due to the deformation, the outer ring and the housing come into contact with each other, and vibration may be transmitted.

  Therefore, conventionally, a rolling bearing (see, for example, Patent Documents 5 to 8) in which an outer ring is covered with a vibration-proof layer made of a resin material having a predetermined thickness has been proposed.

JP-A-8-82362 JP 09-65604 A JP-A-10-66300 JP 2000-120669 A Japanese Utility Model Publication No. 06-80028 JP-A-8-93759 JP 2000-120670 A JP 2004-182169 A

  However, in the rolling bearings described in Patent Documents 5 to 8, since the vibration-proof layer coated on the outer ring is a thin resin material or the like, the vibration-proof layer is cracked or peeled off by shearing force when the rolling bearing is attached to the housing. Will occur, and the vibration isolation performance of the rolling bearing will deteriorate.

  In addition, even if the outer ring is coated with a vibration-proof layer made of a resin material or the like, the resin material has a low rigidity, so that there is a problem that the rolling bearing itself does not have sufficient rigidity as a bearing system. .

  The present invention has been made in order to eliminate such inconveniences, and the object thereof is to suppress vibration transmitted from the outer ring side to the housing side, and to ensure sufficient rigidity as a bearing system. An object of the present invention is to provide a rolling bearing capable of improving the vibration isolation performance.

The above object of the present invention can be achieved by the following constitution.
(1) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A rolling bearing provided with at least an outer peripheral surface of the outer ring, wherein a male screw-like portion is formed on the outer peripheral surface of the outer ring, and a female screw corresponding to the male screw-like portion is formed on the inner peripheral surface of the vibration-proof layer. A rolling bearing characterized by forming a ring-shaped portion and screwing a male screw-shaped portion of the outer ring and a female screw-shaped portion of the vibration isolation layer.
(2) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A rolling bearing comprising at least an anti-vibration layer provided on the outer peripheral surface of the outer ring, wherein the anti-vibration layer is formed in a polygonal cylindrical shape or a multi-arc cylindrical shape.
(3) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A vibration-proof layer provided at least on the outer circumferential surface and the axial end surface of the outer ring, wherein the outer ring has a plurality of convex portions or concave portions, and the vibration-proof layer has a convex portion or concave portion of the outer ring. A rolling bearing characterized in that a corresponding recess or protrusion is formed, and the outer ring and the vibration-proof layer are fitted in an uneven manner.
(4) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A rolling bearing provided with a circumferential surface on the side away from the raceway surface of at least one of the outer ring and the inner ring, and a vibration isolation layer provided on an axial end surface of the raceway, A rolling bearing characterized by being divided into two or more and laminating two or more vibration-proof layers.
(5) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A rolling bearing comprising at least an outer vibration isolation layer provided on the outer peripheral surface of the outer ring, the rolling bearing comprising a fixing means for dividing the vibration isolation layer in the radial direction and fixing the vibration isolation layer to the outer ring. bearing.
(6) The rolling bearing according to (5), wherein the vibration-proof layer is formed in a U-shaped cross section and disposed on the outer peripheral surface of the outer ring and on both end surfaces in the axial direction.
(7) A convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and a concave portion or a convex portion corresponding to the convex portion or the concave portion of the outer peripheral surface of the outer ring is formed on the vibration isolating layer. The rolling bearing as set forth in (5) or (6), wherein:
(8) The vibration-proof layer is formed in a cylindrical shape and disposed on the outer peripheral surface of the outer ring, and a convex portion or a concave portion along the circumferential direction is formed on the outer peripheral surface of the outer ring, and the convex portion of the outer peripheral surface of the outer ring is formed on the vibration-proof layer. The rolling bearing according to (5), wherein a concave portion or a convex portion corresponding to the concave portion or the concave portion is formed, and the outer ring and the vibration-proof layer are engaged with the concave and convex portions.
(9) A convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and a concave portion or a convex portion corresponding to the convex portion or the concave portion of the outer peripheral surface of the outer ring is formed on the vibration isolating layer. The rolling bearing as described in (8), wherein
(10) In any one of (1) to (9), pin holes are formed in the outer ring and the vibration-proof layer, and a fixing pin is inserted into the pin hole to fix the outer ring and the vibration-proof layer. The rolling bearing described.
(11) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface so as to be freely rollable. A ring-shaped vibration-proof layer provided on at least the outer peripheral surface of the outer ring, and cutting a part of the vibration-proof layer in the circumferential direction to impart a spring function to the vibration-proof layer Characteristic rolling bearing.

According to the rolling bearing described in (1), the external thread is formed on the outer peripheral surface of the outer ring, and the female thread corresponding to the male thread is formed on the inner peripheral surface of the vibration isolation layer. Since the portion and the female threaded portion of the vibration-proof layer are screwed together, vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (2), since the vibration-proof layer is formed in a polygonal cylinder shape or a multi-arc cylinder shape, vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (3), a plurality of convex portions or concave portions are formed on the outer ring, and a concave portion or a convex portion corresponding to the convex portion or concave portion of the outer ring is formed on the vibration isolating layer. Since the layer is unevenly fitted, vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (4), since the vibration-proof layer is divided into two or more and two or more vibration-proof layers are laminated, friction is generated on the split surface and the laminated surface of the vibration-proof layer, Since vibration energy is dissipated, vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (5), since the vibration isolation layer is divided in the radial direction and the fixing means for fixing the vibration isolation layer to the outer ring is provided, vibration transmitted from the outer ring side to the housing side can be suppressed. . As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (6), in addition to the invention described in (5), the anti-vibration layer is formed in a U-shaped cross section, and is disposed on the outer peripheral surface of the outer ring and the both axial end surfaces. Vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (7), in addition to the invention described in (5) or (6), a convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and the outer ring is provided in the vibration-proof layer. Since the concave portion or the convex portion corresponding to the convex portion or the concave portion of the outer peripheral surface is formed, and the outer ring and the vibration-proof layer are engaged with each other, the vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (8), in addition to the invention described in (5), the vibration-proof layer is formed in a cylindrical shape and disposed on the outer peripheral surface of the outer ring, and in the circumferential direction on the outer peripheral surface of the outer ring. The outer ring side is formed so that the outer ring and the anti-vibration layer are fitted to the outer ring side by forming the convex part or the concave part along the outer ring and forming the concave part or the convex part corresponding to the convex part or the concave part of the outer peripheral surface of the outer ring. Vibration transmitted from the housing to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (9), in addition to the invention described in (8), a convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and the outer peripheral surface of the outer ring is formed on the vibration isolation layer. Since the concave portion or the convex portion corresponding to the convex portion or the concave portion is formed, and the outer ring and the vibration-proof layer are engaged with each other, the vibration transmitted from the outer ring side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.
According to the rolling bearing described in (10), in addition to the invention described in any one of (1) to (9), a pin hole is formed in the outer ring and the vibration isolation layer, and a stop pin is inserted into the pin hole. Thus, since the outer ring and the vibration isolation layer are fixed, it is possible to reliably prevent the vibration isolation layer from coming off the outer ring.
According to the rolling bearing described in (11), the vibration transmitted from the outer ring side to the housing side can be suppressed in order to cut a part of the vibration-proof layer in the circumferential direction and impart a spring function to the vibration-proof layer. it can. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.

  Hereinafter, each embodiment of the rolling bearing according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-5, 1st Embodiment of the rolling bearing which concerns on this invention is described.
1 is a cross-sectional view for explaining a first embodiment of a rolling bearing according to the present invention, FIG. 2 is a diagram for explaining an outer ring of the rolling bearing shown in FIG. 1, and FIG. 3 is a diagram of the rolling bearing shown in FIG. FIG. 4 is a sectional view for explaining a vibration-proof layer, FIG. 4 is a sectional view for explaining a modification of the first embodiment, and FIG. 5 is a perspective view of the rolling bearing shown in FIG.

  As shown in FIG. 1, the rolling bearing 10 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring raceway. A plurality of balls (rolling elements) 13 interposed between the surface 12a and the surface 12a, and a vibration-proof layer 14 provided on the outer peripheral surface and the axial end surface of the outer ring 11 are provided.

  The anti-vibration layer 14 includes a cylindrical portion 14 a disposed on the outer peripheral surface of the outer ring 11 and an end plate 14 b disposed on the end surface in the axial direction of the outer ring 11, and is formed in a substantially L-shaped cross section.

  In the present embodiment, as shown in FIG. 2, a male screw-like portion 15 is formed on the outer peripheral surface of the outer ring 11, and as shown in FIG. 3, a male screw is provided on the inner peripheral surface of the cylindrical portion 14a of the vibration-proof layer 14. A female threaded portion 16 corresponding to the contoured portion 15 is formed, and the male threaded portion 15 of the outer ring 11 and the female threaded portion 16 of the vibration isolation layer 14 are screwed together so that the outer ring 11 and the vibration isolation layer 14 are integrated. It is fixed to.

  In the present embodiment, a vibration-proof layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12, and the inner ring 12 and the vibration-proof layer may be screwed together as described above.

  The material of the vibration-proof layer 14 is not particularly limited as long as the vibration-proof performance can be improved. For example, as shown in Japanese Patent Application Laid-Open Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable. In this case, the rigidity of the entire bearing can be improved.

  Therefore, according to the rolling bearing 10 of the present embodiment, the male threaded portion 15 is formed on the outer peripheral surface of the outer ring 11, and the female threaded portion 16 corresponding to the male threaded portion 15 is formed on the inner peripheral surface of the vibration isolation layer 14. In addition, since the male threaded portion 15 of the outer ring 11 and the female threaded portion 16 of the vibration isolation layer 14 are screwed together, the vibration isolation layer 14 is not peeled off from the outer ring 11, so that the outer ring 11 side is moved to the housing side. The transmitted vibration can be reliably suppressed. Thereby, it is possible to sufficiently ensure the rigidity of the rolling bearing 10 as a bearing system and to improve the vibration isolation performance.

  Further, according to the rolling bearing 10 of the present embodiment, the vibration in the axial direction among the vibrations transmitted from the outer ring 11 side to the housing side is the female screw shape of the vibration isolation layer 14 that has entered the thread groove of the male screw portion 15 of the outer ring 11. The thread of the portion 16 and the axial deformation of the end plate 14b of the vibration isolation layer 14 are absorbed, and the vibration in the radial direction is absorbed by the deformation of the vibration isolation layer 14 in the radial direction.

  Further, according to the rolling bearing 10 of the present embodiment, the vibration proof layer 14 can be assembled to the outer peripheral surface of the outer ring 11 simply by screwing the vibration proof layer 14 to the outer peripheral surface of the outer ring 11. Assembling property between the outer ring 11 and the outer ring 11 can be improved.

  Further, when the rotation direction of the rotating shaft is right rotation, the male screw-like portion 15 and the female screw-like portion 16 are left-handed. In the case of left-hand rotation, the male screw-like portion 15 and the female screw-like portion 16 are right-handed. Since the tightening direction of the vibration-proof layer 14 and the rotation direction of the drive shaft can be reversed, it is possible to prevent the vibration-proof layer 14 from coming off from the outer ring 11.

  As a modification of the present embodiment, as shown in FIGS. 4 and 5, pin holes 17 corresponding to the axial end surface of the outer ring 11 and the end plate 14 b of the vibration isolation layer 14 are provided, and each pin hole 17 is provided. The retaining pin 18 is fitted into the outer ring 11 and the outer ring 11 and the vibration isolating layer 14 are pin-fixed. Thereby, it is possible to reliably prevent the vibration-proof layer 14 from coming off from the outer ring 11.

(Second Embodiment)
Next, with reference to FIGS. 6-9, 2nd Embodiment of the rolling bearing which concerns on this invention is described. In addition, the same code | symbol is attached | subjected about the part equivalent to the said 1st Embodiment, and the description is abbreviate | omitted or simplified.
6 is a view for explaining a second embodiment of the rolling bearing according to the present invention, FIG. 7 is a perspective view of the rolling bearing shown in FIG. 6, FIG. 8 is a sectional view of the rolling bearing shown in FIG. 6, and FIG. It is sectional drawing for demonstrating the modification of 2nd Embodiment.

  As shown in FIGS. 6 to 8, the rolling bearing 20 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, and an outer ring raceway surface 11a. And a plurality of balls (rolling elements) 13 interposed between the inner ring raceway surface 12a and the inner ring raceway surface 12a, and a vibration isolation layer 24 provided on the outer circumferential surface of the outer ring 11.

  In the present embodiment, the anti-vibration layer 24 has a regular polygonal cylinder shape, and the anti-vibration layer 24 is fitted to the outer peripheral surface of the outer ring 11.

  In the present embodiment, the anti-vibration layer 24 has a regular hexagonal cylindrical shape, but the number of corners is not particularly limited. Further, the vibration isolation layer 24 may have a multi-arc cylinder shape instead of the polygonal cylinder shape. Further, a vibration-proof layer may be provided on the inner peripheral surface of the inner ring 12, and the inner ring 12 and the vibration-proof layer may be fitted as described above. Furthermore, the outer ring, the inner ring, and the vibration-proof layer may be integrally fixed by a non-slip mechanism such as a pin or a key.

  The material of the anti-vibration layer 24 is not particularly limited as long as the anti-vibration performance can be improved. For example, as shown in JP-A Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable. In this case, the rigidity of the entire bearing can be improved.

  Therefore, according to the rolling bearing 20 of the present embodiment, the anti-vibration layer 24 is formed in a polygonal cylindrical shape, so that spring properties can be obtained when the anti-vibration layer 24 is elastically deformed in the radial direction. Vibration transmitted from the housing to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.

As a modification of the present embodiment, as shown in FIG. 9, a vibration isolation layer 25 may be disposed on the axial end surface of the outer ring 11. In this case, the vibration-proof layer 25 and the vibration-proof layer 24 may be separate or integrated, and the vibration-proof layer 25 may be a plate having a corrugated surface, but it may be a flat plate because it assumes an axial preload.
Other configurations and operational effects are the same as those in the first embodiment.

(Third embodiment)
Next, with reference to FIGS. 10-15, 3rd Embodiment of the rolling bearing which concerns on this invention is described. In addition, the same code | symbol is attached | subjected about the part equivalent to the said 1st Embodiment, and the description is abbreviate | omitted or simplified.
FIG. 10 is a sectional view for explaining a third embodiment of the rolling bearing according to the present invention, FIG. 11 is a view of the end of the vibration isolation layer facing the outer ring side as seen from the axial direction, and FIG. FIG. 13 is a perspective view of the anti-vibration layer shown in FIG. 11, and FIG. 14 is a first modified example of the third embodiment. FIG. 15 is a diagram for explaining a second modification of the third embodiment.

  As shown in FIG. 10, the rolling bearing 30 of this embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring raceway. A plurality of balls (rolling elements) 13 interposed between the surface 12a and the surface of the outer ring 11 and an anti-vibration layer 34 are provided on the outer peripheral surface and the axial end surface.

  The anti-vibration layer 34 includes a cylindrical portion 34 a disposed on the outer peripheral surface of the outer ring 11 and an end plate 34 b disposed on the end surface in the axial direction of the outer ring 11, and has a substantially L-shaped cross section.

  In this embodiment, as shown in FIG. 12, a plurality (four in the figure) of recesses 35 are formed on the end surface in the axial direction of the outer ring 11 at substantially equal intervals in the circumferential direction. As shown, a convex portion 36 corresponding to the concave portion 35 of the outer ring 11 is formed on the end plate 34b of the vibration-proof layer 34, and the concave portion 35 of the outer ring 11 and the convex portion 36 of the vibration-proof layer 34 are fitted into the concave and convex portions, The outer ring 11 and the vibration-proof layer 34 are fixed integrally.

  In addition, in this embodiment, although the number of the recessed parts 35 of the outer ring | wheel 11 and the convex part 36 of the anti-vibration layer 34 is each 4, the number of the recessed parts 35 and the convex parts 36 is not specifically limited. Further, the outer ring 11 may be provided with a convex portion 36 and the vibration-proof layer 34 may be provided with a concave portion 35 so that the both are concavo-convexly fitted. Furthermore, an anti-vibration layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12, and the inner ring 12 and the anti-vibration layer may be concavo-convexly fitted as described above.

  The material of the anti-vibration layer 34 is not particularly limited as long as the anti-vibration performance can be improved. For example, as shown in JP-A Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable. In this case, the rigidity of the entire bearing can be improved.

  Therefore, according to the rolling bearing 30 of the present embodiment, a plurality of recesses 35 are formed in the outer ring 11, and a protrusion 36 corresponding to the recess 35 of the outer ring 11 is formed in the vibration isolation layer 34. Since the layer 34 is concavo-convexly fitted, vibration transmitted from the outer ring 11 side to the housing side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.

  Further, according to the rolling bearing 30 of the present embodiment, the axial vibration of the vibration transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the end plate 34b of the vibration isolation layer 34, and the radial direction vibration is absorbed. The vibration is absorbed by the deformation of the vibration-proof layer 34 in the radial direction.

  Furthermore, according to the rolling bearing 30 of the present embodiment, since the concave portion 35 of the outer ring 11 and the convex portion 36 of the vibration isolation layer 34 are unevenly fitted, the relative rotation between the outer ring 11 and the vibration isolation layer 34 is ensured. In addition, the creep between the outer ring 11 and the vibration isolation layer 34 can be reliably prevented.

  As a first modification of the present embodiment, as shown in FIG. 14, concave grooves 37 (or ridges 38) penetrating in the axial direction are formed on the outer peripheral surface of the outer ring 11 at substantially equal intervals in the circumferential direction. A plurality of ridges 38 (or grooves 37) corresponding to the grooves 37 (or ridges 38) of the outer ring 11 are formed on the inner peripheral surface of the cylindrical portion 34 a of the vibration isolation layer 34, and the grooves of the outer ring 11 are formed. 37 (or ridges 38) and the ridges 38 (or concave grooves 37) of the vibration isolation layer 34 may be concavo-convexly fitted.

As a second modification of the present embodiment, as shown in FIG. 15, pin holes 17 corresponding to the outer peripheral surface of the outer ring 11 and the cylindrical portion 34 a of the vibration isolation layer 34 are provided, and the pin holes 17 are fastened. The pin 18 is fitted and the outer ring 11 and the vibration isolation layer 34 are pin-fixed. In this case, it is possible to reliably prevent the vibration-proof layer 34 from coming off the outer ring 11.
Other configurations and operational effects are the same as those in the first embodiment.

(Fourth embodiment)
Next, with reference to FIGS. 16-19, 4th Embodiment of the rolling bearing which concerns on this invention is described. In addition, the same code | symbol is attached | subjected about the part equivalent to the said 1st Embodiment, and the description is abbreviate | omitted or simplified.
16 is a cross-sectional view for explaining a fourth embodiment of the rolling bearing according to the present invention, FIG. 17 is an enlarged cross-sectional view of a portion A in FIG. 16, and FIG. 18 shows a vibration-proof layer disposed on the outer peripheral surface of the outer ring. FIG. 19 is a view showing a vibration-proof layer disposed on the end surface in the axial direction of the outer ring.

  As shown in FIGS. 16 and 17, the rolling bearing 40 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, and an outer ring raceway surface 11a. A plurality of balls (rolling elements) 13 interposed between the inner ring raceway surface 12a and the inner ring raceway surface 12a, and a vibration isolation layer 44 provided on the outer peripheral surface and the axial end surface of the outer ring 11. The inner ring 12 is fitted on the drive shaft 45, and the outer ring 11 is fitted on the housing 46.

  The anti-vibration layer 44 includes a cylindrical portion 47 disposed on the outer peripheral surface of the outer ring 11 and an end plate 48 disposed on the end surface in the axial direction of the outer ring 11, and has a substantially L-shaped cross section.

  In the present embodiment, the cylindrical portion 47 and the end plate 48 of the vibration-proof layer 44 are separated on the extension line of the axial end surface of the outer ring 11, and the cylindrical portion 47 is separated as shown in FIG. A plurality of (two layers in the figure) thin-walled cylindrical anti-vibration materials 47a and 47b having different diameters are laminated, and a plurality of (two layers in the figure) end-plates 48 are formed as shown in FIG. The plate-shaped vibration isolating materials 48a and 48b are laminated.

  In the present embodiment, the vibration-proof layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12 as described above. Furthermore, the outer ring, the inner ring, and the vibration-proof layer may be integrally fixed by a non-slip mechanism such as a pin or a key.

  The material of the anti-vibration layer 44 is not particularly limited as long as the anti-vibration performance can be improved. For example, as shown in JP-A Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable. In this case, the anti-vibration materials 47a and 47b and the anti-vibration materials 48a and 48b are not laminated with the same material, but an Mn-based alloy and a resin may be laminated.

  Therefore, according to the rolling bearing 40 of the present embodiment, the vibration isolating layer 44 is divided into the cylindrical portion 47 and the end plate 48 and the cylindrical portion 47 and the end plate 48 are laminated in two layers. Since friction is generated on the divided surface (contact surface between the cylindrical portion 47 and the end plate 48), the laminated surface of the vibration isolating materials 47a and 47b, and the laminated surface of the vibration isolating materials 48a and 48b, the vibration energy is dissipated. Vibration transmitted from the outer ring 11 side to the housing 46 side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.

Further, according to the rolling bearing 40 of the present embodiment, the axial vibration among the vibrations transmitted from the outer ring 11 side to the housing 46 side is absorbed by the axial deformation of the end plate 48 of the vibration isolation layer 44, and the radial direction Is absorbed by the radial deformation of the cylindrical portion 47 of the vibration-proof layer 44.
Other configurations and operational effects are the same as those in the first embodiment.

(Fifth embodiment)
Next, each aspect of the fifth embodiment of the rolling bearing according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the part equivalent to the said 1st Embodiment, and the description is abbreviate | omitted or simplified.
20 is a view for explaining a first mode of a fifth embodiment of the rolling bearing according to the present invention, FIG. 21 is a sectional view taken along line AA of FIG. 20, and FIG. 22 is a second mode of the fifth embodiment. FIG. 23 is a cross-sectional view taken along line AA in FIG. 22, FIG. 24 is a view for explaining a third aspect of the fifth embodiment, and FIG. 25 is a cross-sectional view taken along line AA in FIG. 26 is a sectional view taken along line BB in FIG. 24, FIG. 27 is a diagram for explaining a fourth mode of the fifth embodiment, FIG. 28 is a sectional view taken along line AA in FIG. FIG. 30 is a sectional view taken along line AA in FIG. 29, FIG. 31 is a sectional view taken along line BB in FIG. 29, and FIG. 32 is a sixth aspect of the fifth embodiment. FIG. 33 is a cross-sectional view taken along line AA in FIG. 32, FIG. 34 is a view for explaining a seventh aspect of the fifth embodiment, and FIG. 35 is a cross-sectional view taken along line AA in FIG. FIG. It is a B-B line sectional view of FIG. 34.

(First aspect)
First, with reference to FIG.20 and FIG.21, the 1st aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  As shown in FIGS. 20 and 21, the rolling bearing 50A of this aspect includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, and an outer ring raceway surface 11a. A plurality of balls (rolling elements) 13 interposed between the inner ring raceway surface 12a and the inner ring raceway surface 12a, and an anti-vibration layer 54A provided on the outer peripheral surface and the axial end surface of the outer ring 11 are provided.

  The vibration-proof layer 54A includes a cylindrical portion 54a that is disposed approximately in the axial width of the outer peripheral surface of the outer ring 11, and an end plate 54b that is disposed on the end surface in the axial direction of the outer ring 11, and has a substantially L-shaped cross section. It is formed into a shape.

  In this embodiment, the vibration-proof layer 54A is divided into two in the radial direction, the vibration-proof layer 54A is fixed to the outer ring 11 by fixing means such as adhesion, and the cylindrical portion 54a and the end plate 54b are respectively connected to the housing H. Press against the inner circumference and shoulder.

  In this aspect, the number of divisions of the vibration isolation layer 54A is two, but the number of divisions is not particularly limited. Moreover, you may make it provide an anti-vibration layer in the inner peripheral surface and axial direction end surface of the inner ring | wheel 12 as mentioned above.

  The material of the vibration-proof layer 54A is not particularly limited as long as the vibration-proof performance can be improved. For example, as shown in JP-A Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable. The material of the vibration proof layer 54A is also applied to the following vibration proof layers 54B to 54G.

  Therefore, according to the rolling bearing 50A of this aspect, since the vibration isolating layer 54A is divided into two in the radial direction and the fixing means for fixing the vibration isolating layer 54A to the outer ring 11 is provided, vibration transmitted from the outer ring 11 side to the housing H side. Can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance. Moreover, since the fixing means for fixing the vibration isolation layer 54A to the outer ring 11 is provided, the relative rotation between the outer ring 11 and the vibration isolation layer 54A can be prevented.

  Further, according to the rolling bearing 50A of this aspect, the axial vibration of the vibration transmitted from the outer ring 11 side to the housing H side is absorbed by the axial deformation of the end plate 54b of the vibration isolation layer 54A, and the radial direction vibration is absorbed. The vibration is absorbed by the radial deformation of the cylindrical portion 54a of the vibration-proof layer 54A.

  Furthermore, according to the rolling bearing 50A of this aspect, since the vibration-proof layer 54A is divided into two, the assemblability of the outer ring 11 and the vibration-proof layer 54A can be improved, and it is used for the vibration-proof layer. The degree of freedom of material can be increased.

(Second embodiment)
Next, with reference to FIG.22 and FIG.23, the 2nd aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.
The rolling bearing 50B according to this aspect uses the vibration-proof layer 54B instead of the vibration-proof layer 54A according to the first aspect. The anti-vibration layer 54B includes a cylindrical portion 154a disposed over the entire outer peripheral surface of the outer ring 11, and a pair of end plates 154b disposed on both end surfaces of the outer ring 11 in the axial direction, and has a substantially U-shaped cross section. It is formed and divided into two in the radial direction.

  In this aspect, the number of divisions of the anti-vibration layer 54B is two, but the number of divisions is not particularly limited. Moreover, you may make it provide an anti-vibration layer in the inner peripheral surface and axial direction end surface of the inner ring | wheel 12 as mentioned above.

  Therefore, according to the rolling bearing 50B of this aspect, in addition to the same effect as the first aspect, the vibration-proof layer 54B is formed in a substantially U-shaped cross section, so that the mounting position of the vibration-proof layer 54B is distinguished. Since it becomes unnecessary, the assembling property between the outer ring 11 and the vibration-proof layer 54B can be further improved.

  Further, according to the rolling bearing 50B of this aspect, the vibration in the axial direction among the vibrations transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the pair of end plates 154b of the vibration isolation layer 54B, and the radial direction Is absorbed by the radial deformation of the cylindrical portion 154a of the vibration-proof layer 54B.

(Third aspect)
Next, with reference to FIGS. 24-26, the 3rd aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  The rolling bearing 50C according to this aspect uses the vibration-proof layer 54C instead of the vibration-proof layer 54A according to the first aspect. The anti-vibration layer 54C includes a cylindrical portion 154a disposed over the entire outer peripheral surface of the outer ring 11, and a pair of end plates 154b disposed on both end surfaces in the axial direction of the outer ring 11, and has a substantially U-shaped cross section. It is formed and divided into two in the radial direction.

  In this embodiment, a plurality (two in the figure) of axial recesses 155 are formed on the outer peripheral surface of the outer ring 11 at substantially equal intervals in the circumferential direction, and on the inner peripheral surface of the cylindrical portion 154a of the vibration isolation layer 54C. A plurality of axial convex portions 156 corresponding to the axial concave portions 155 are formed, and the axial concave portions 155 of the outer ring 11 and the axial convex portions 156 of the vibration isolating layer 54C are concavo-convexly fitted, so that the outer ring 11 and the vibration isolating layer are fitted. 54C is fixed integrally.

  In this aspect, the number of the axial concave portions 155 of the outer ring 11 and the number of the axial convex portions 156 of the vibration isolation layer 54C are two, but the number of the axial concave portions 155 and the axial convex portions 156 is not particularly limited. . Moreover, while providing the axial direction convex part 156 in the outer ring | wheel 11, the axial direction recessed part 155 may be provided in the vibration-proof layer 54C, and you may make it carry out uneven | corrugated fitting of both. Moreover, although the number of divisions of the vibration isolation layer 54C is two, the number of divisions is not particularly limited. Furthermore, a vibration-proof layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12 as described above.

  Therefore, according to the rolling bearing 50C of this aspect, in addition to the same effects as those of the first and second aspects, the axial recess 155 of the outer ring 11 and the axial protrusion 156 of the vibration isolation layer 54C are unevenly fitted. Therefore, relative rotation between the outer ring 11 and the vibration isolation layer 54C can be reliably prevented, and creep between the outer ring 11 and the vibration isolation layer 54C can be prevented.

  Further, according to the rolling bearing 50C of this aspect, the axial vibration among the vibrations transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the pair of end plates 154b of the vibration isolation layer 54C, and the radial direction Is absorbed by the radial deformation of the cylindrical portion 154a of the vibration-proof layer 54C.

(4th aspect)
Next, with reference to FIG.27 and FIG.28, the 4th aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  The rolling bearing 50D of this aspect uses a vibration-proof layer 54D instead of the vibration-proof layer 54A of the first aspect. The anti-vibration layer 54 </ b> D is formed in a cylindrical shape disposed over the entire outer peripheral surface of the outer ring 11, and is divided into two in the radial direction.

  Further, in this aspect, the circumferential recess 165 is formed on the outer circumferential surface of the outer ring 11, and the circumferential projection 166 corresponding to the circumferential recess 165 is formed on the inner circumferential surface of the vibration isolation layer 54 </ b> D. The directional concave portion 165 and the circumferential convex portion 166 of the vibration isolation layer 54D are concavo-convexly fitted, and the outer ring 11 and the vibration isolation layer 54D are integrally fixed by a fixing means such as adhesion.

  In this aspect, the number of rows of the circumferential recess 165 of the outer ring 11 and the number of rows of the circumferential projections 166 of the vibration isolation layer 54D is one, but the number of rows of the circumferential recess 165 and the circumferential projection 166 is particularly large. It is not limited. Moreover, while providing the circumferential convex part 166 in the outer ring | wheel 11, you may make it provide uneven | corrugated fitting by providing the circumferential recessed part 165 in the vibration isolating layer 54D. Moreover, although the number of divisions of the vibration isolation layer 54D is two, the number of divisions is not particularly limited. Furthermore, a vibration-proof layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12 as described above.

  Therefore, according to the rolling bearing 50D of this aspect, in addition to the same effect as the first aspect, the vibration-proof layer 54D is formed in a cylindrical shape, so that the space between the end surface of the outer ring 11 and the housing is reduced. Can be omitted. Thereby, the axial compactness of the rolling bearing can be achieved.

  Further, according to the rolling bearing 50D of this aspect, the vibration isolating layer 54D is assembled to the outer circumferential surface of the outer ring 11 by fitting the circumferential convex portion 166 of the vibration isolating layer 54D to the circumferential concave portion 165 of the outer ring 11 by concavo-convex fitting. Therefore, the assembling property between the outer ring 11 and the vibration isolation layer 54D can be further improved.

  Further, according to the rolling bearing 50D of this aspect, the circumferential concave portion 165 of the outer ring 11 and the circumferential convex portion 166 of the vibration isolation layer 54D are concavo-convexly fitted, so that the frictional force acting on the fitting portion is effective. Creep between the outer ring 11 and the vibration-proof layer 54D can be prevented.

  Furthermore, according to the rolling bearing 50D of this aspect, the vibration in the axial direction among the vibrations transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the circumferential convex portion 166 of the vibration isolation layer 54D, and the radial direction Are absorbed by the radial deformation of the vibration-proof layer 54D.

(5th aspect)
Next, with reference to FIGS. 29-31, the 5th aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  The rolling bearing 50E according to this aspect uses the vibration-proof layer 54E instead of the vibration-proof layer 54A according to the first aspect. The anti-vibration layer 54E is formed in a cylindrical shape disposed over the entire outer peripheral surface of the outer ring 11, and is divided into two in the radial direction.

  Further, in this aspect, the circumferential recess 165 is formed on the outer peripheral surface of the outer ring 11, the circumferential protrusion 166 corresponding to the circumferential recess 165 is formed on the inner peripheral surface of the vibration isolation layer 54 </ b> E, and the outer ring 11. A plurality (two in the figure) of axial recesses 175 are formed on the outer peripheral surface of the anti-vibration layer at substantially equal intervals in the circumferential direction, and a plurality of axial protrusions corresponding to the axial recesses 175 are formed on the inner peripheral surface of the vibration isolation layer 54E. Part 176 is formed, and the circumferential concave portion 165 of the outer ring 11 and the circumferential convex portion 166 of the vibration isolation layer 54E are fitted, and the axial concave portion 175 of the outer ring 11 and the axial convex portion 176 of the vibration isolation layer 54E And the outer ring 11 and the vibration-proof layer 54E are fixed integrally.

  In this aspect, the number of the axial concave portions 175 of the outer ring 11 and the number of the axial convex portions 176 of the vibration isolation layer 54E are two, but the number of the axial concave portions 175 and the axial convex portions 176 is not particularly limited. . Further, the outer ring 11 may be provided with the circumferential convex portions 176 and 176, and the vibration-proof layer 54E may be provided with the circumferential concave portions 175 and 175 so that the both are concavo-convexly fitted. Moreover, although the number of divisions of the vibration isolation layer 54E is two, the number of divisions is not particularly limited. Furthermore, a vibration-proof layer may be provided on the inner peripheral surface and the axial end surface of the inner ring 12 as described above.

  Further, in this aspect, the number of columns of the circumferential recess 165 of the outer ring 11 and the circumferential projection 166 of the vibration isolation layer 54E is one, but the number of columns is not particularly limited. Further, the outer ring 11 may be provided with a circumferential convex portion 166, and the vibration-proof layer 54E may be provided with a circumferential concave portion 165 so that both are concavo-convexly fitted.

  Therefore, according to the rolling bearing 50E of this aspect, since the axial concave portion 175 of the outer ring 11 and the axial convex portion 176 of the vibration isolating layer 54E are concavo-convexly fitted, the relative relationship between the outer ring 11 and the vibration isolating layer 54E. Rotation can be reliably prevented.

  Further, according to the rolling bearing 50E of this aspect, the vibration in the axial direction among the vibrations transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the circumferential convex portion 166 of the vibration-proof layer 54E, and the radial direction Is absorbed by the radial deformation of the vibration-proof layer 54E.

(Sixth aspect)
Next, with reference to FIG.32 and FIG.33, the 6th aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  The rolling bearing 50F of this aspect uses a vibration-proof layer 54F instead of the vibration-proof layer 54A of the first aspect. The anti-vibration layer 54F is disposed on the outer circumferential surface of the outer ring 11, and has a cylindrical portion 254a formed with a larger radius of curvature than the outer circumferential surface of the outer ring 11, and a pair of ends disposed on both axial end surfaces of the cylindrical portion 254a. And a plate 254b, is formed in a substantially U-shaped cross section, and is divided into two in the radial direction. Further, when the divided anti-vibration layers 54F are joined, the inner peripheral surface of the cylindrical portion 254a and the outer peripheral surface of the outer ring 11 are formed in line contact.

  In this aspect, the number of divisions of the anti-vibration layer 54F is two, but the number of divisions is not particularly limited. Moreover, you may make it provide an anti-vibration layer in the inner peripheral surface and axial direction end surface of the inner ring | wheel 12 as mentioned above.

  Therefore, according to the rolling bearing 50F of this aspect, in addition to the same effects as those of the first and second aspects, the anti-vibration layer 54F is formed in order to make the radius of curvature of the anti-vibration layer 54F larger than the outer peripheral surface of the outer ring 11. A spring can be interposed between the outer ring 11 and the housing. As a result, since the vibration isolating layer 54F is always pressed against the outer ring 11 and the housing, it is possible to reliably prevent the vibration isolating layer 54F from being detached from the outer ring 11, and the relative rotation between the outer ring 11 and the vibration isolating layer 54F. Can be reliably prevented. The same effect can be obtained even if the radius of curvature of the vibration-proof layer 54F is smaller than the outer peripheral surface of the outer ring 11.

  Further, according to the rolling bearing 50F of this aspect, the vibration in the axial direction out of the vibration transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the pair of end plates 254b of the vibration isolation layer 54F, and the radial direction Is absorbed by the radial deformation of the cylindrical portion 254a of the vibration-proof layer 54F.

(Seventh aspect)
Next, with reference to FIGS. 34-36, the 7th aspect of 5th Embodiment of the rolling bearing which concerns on this invention is demonstrated.

  The rolling bearing 50G of this aspect uses a vibration-proof layer 54G instead of the vibration-proof layer 54A of the first aspect. The anti-vibration layer 54G has a plurality of (two in the figure) pin holes 17G formed in the circumferential direction at substantially equal intervals in the cylindrical portion 154a of the anti-vibration layer 54B of the second aspect. Then, pin holes 18G corresponding to the pin holes 17G are formed on the outer peripheral surface of the outer ring 11, and the retaining pins 19G are fitted into the pin holes 17G and 18G, so that the outer ring 11 and the vibration-proof layer 54G are fixed integrally. is doing.

  In this aspect, the number of divisions of the vibration isolation layer 54G is two, but the number of divisions is not particularly limited. Moreover, you may make it provide an anti-vibration layer in the inner peripheral surface and axial direction end surface of the inner ring | wheel 12 as mentioned above.

  Therefore, according to the rolling bearing 50G of this aspect, in addition to the same effects as the first and second aspects, the outer ring 11 and the vibration isolating layer 54G are fixed by the stop pin 19G. 11 can be reliably prevented, and relative rotation between the outer ring 11 and the vibration-proof layer 54C can be reliably prevented.

Further, according to the rolling bearing 50G of this aspect, the axial vibration among the vibrations transmitted from the outer ring 11 side to the housing side is absorbed by the axial deformation of the pair of end plates 154b of the vibration isolation layer 54G, and the radial direction Is absorbed by the radial deformation of the cylindrical portion 154a of the vibration-proof layer 54G.
Other configurations and operational effects are the same as those in the first embodiment.

(Sixth embodiment)
Next, with reference to FIGS. 37-42, 6th Embodiment of the rolling bearing which concerns on this invention is described. In addition, the same code | symbol is attached | subjected about the part equivalent to the said 1st Embodiment, and the description is abbreviate | omitted or simplified.
FIG. 37 is a cross-sectional view for explaining a sixth embodiment of the rolling bearing according to the present invention, FIG. 38 is a perspective view of the vibration isolating layer used in the rolling bearing shown in FIG. 37, and FIG. FIG. 40 is a perspective view for explaining a second modification of the vibration-proof layer, FIG. 41 is a perspective view for explaining a third modification of the vibration-proof layer, and FIG. These are the perspective views for demonstrating the 4th modification of an anti-vibration layer.

  As shown in FIG. 37, the rolling bearing 60 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring raceway. A plurality of balls (rolling elements) 13 interposed between the surface 12a and the surface 12a, and a vibration-proof layer 64 provided on the outer peripheral surface of the outer ring 11 are provided.

  In the present embodiment, a part of the anti-vibration layer 64 formed in a cylindrical shape in the circumferential direction is cut to give the anti-vibration layer 64 a spring function. Specifically, as shown in FIG. 38, a part of the vibration-proof layer 64 in the circumferential direction is cut along the axial direction to give the vibration-proof layer 64 a spring function. The vibration isolation layer 64 is formed so that the inner diameter is smaller than the outer diameter of the outer ring 11. When the vibration isolation layer 64 is attached to the outer ring 11, the vibration isolation layer 64 is expanded in the radial direction by the outer ring 11. Attached to. In addition, the rolling bearing 60 is disposed at a position where the cut portion of the vibration-proof layer 64 is different from the radial load direction applied to the outer ring 11 from the inner ring 12 through the ball 13 (for example, 180 ° position (horizontal direction)). Is assembled to the housing.

  The material of the anti-vibration layer 64 is not particularly limited as long as the anti-vibration performance can be improved. For example, as shown in JP-A Nos. 2002-146498 and 2003-253369, Mn : 73% by weight, Cu: 20% by weight, Ni: 5% by weight, Fe: 2% by weight, an Mn-based alloy, and an acrylic rubber, acrylonitrile butadiene rubber (NBR) as disclosed in JP-A-2003-148462 ), Fluoro rubber, hydrogenated acrylonitrile butadiene rubber (H-NBR), thermoplastic elastomer (polyester elastomer, polyamide elastomer) and the like are more preferable.

  Therefore, according to the rolling bearing 60 of the present embodiment, a part of the vibration isolating layer 64 in the circumferential direction is cut along the axial direction to provide the anti-vibration layer 64 with a spring function. Vibration transmitted to the side can be suppressed. As a result, it is possible to sufficiently ensure the rigidity of the rolling bearing as a bearing system and to improve the vibration isolation performance.

  Further, according to the rolling bearing 60 of the present embodiment, since the anti-vibration layer 64 is attached to the outer peripheral surface of the outer ring 11 with a tightening force in order to give the anti-vibration layer 64 a spring function, the outer ring 11 and the anti-vibration layer 64 are provided. Creep can be reliably prevented, and the adhesion between the outer ring 11 and the vibration proof layer 64 is increased, and the vibration suppressing effect can be further improved.

  As a first modification of the present embodiment, as shown in FIG. 39, a part of the circumferential direction of the vibration isolation layer 64 is cut obliquely in the axial direction to give the vibration isolation layer 64 a spring function. Also good.

  Further, as a second modification of the present embodiment, as shown in FIG. 40, a part of the vibration-proof layer 64 in the circumferential direction is cut into a substantially V shape to give the vibration-proof layer 64 a spring function. Also good.

  As a third modification of the present embodiment, as shown in FIG. 41, a part of the vibration isolating layer 64 in the circumferential direction is cut into a jagged shape (wave shape) to give the anti-vibration layer 64 a spring function. May be.

  Further, as a fourth modification of the present embodiment, as shown in FIG. 42, the anti-vibration layer 64 may be formed in a spiral shape, and the anti-vibration layer 64 may be provided with a spring function.

  In the present embodiment, an annular plate-shaped vibration isolation layer may be provided between the axial end of the outer ring 11 and the housing to suppress vibration in the axial direction. Further, a flange-shaped vibration-proof layer may be provided at the axial end of the vibration-proof layer 64 to suppress vibrations in both the radial direction and the axial direction.

  In this embodiment, the same effect as that of the sixth embodiment can be obtained by attaching the vibration-proof layer 64 whose outer diameter before assembly is larger than the inner diameter of the housing to the inner peripheral surface of the housing. .

  In the present embodiment, for example, the anti-vibration layer 64 and the outer ring 11 may be integrally fixed by anti-slip by unevenness such as pins and keys.

  Furthermore, in this embodiment, a vibration-proof layer may be attached to the inner peripheral surface of the inner ring 12. In this case, the vibration-proof layer is formed so that the outer diameter is larger than the inner diameter of the inner ring 12 or the inner diameter is smaller than the shaft diameter.

It is sectional drawing for demonstrating 1st Embodiment of the rolling bearing which concerns on this invention. It is a figure for demonstrating the outer ring | wheel of the rolling bearing shown in FIG. It is sectional drawing for demonstrating the vibration-proof layer of the rolling bearing shown in FIG. It is a cross section for demonstrating the modification of 1st Embodiment. It is a perspective view of the rolling bearing shown in FIG. It is a figure for demonstrating 2nd Embodiment of the rolling bearing which concerns on this invention. It is a perspective view of the rolling bearing shown in FIG. It is sectional drawing of the rolling bearing shown in FIG. It is sectional drawing for demonstrating the modification of 2nd Embodiment. It is sectional drawing for demonstrating 3rd Embodiment of the rolling bearing which concerns on this invention. It is the figure which looked at the edge part which faces the outer ring | wheel side of the vibration-proof layer from the axial direction. It is the figure which looked at the edge part which faces the vibration-proof layer side of the rolling bearing before fitting a vibration-proof layer from the axial direction. It is a perspective view of the vibration-proof layer shown in FIG. It is a figure for demonstrating the 1st modification of 3rd Embodiment. It is a figure for demonstrating the 2nd modification of 3rd Embodiment. It is sectional drawing for demonstrating 4th Embodiment of the rolling bearing which concerns on this invention. It is the A section expanded sectional view of FIG. It is a figure which shows the vibration isolating layer arrange | positioned at the outer peripheral surface of an outer ring | wheel. It is a figure which shows the vibration isolating layer arrange | positioned at the axial direction end surface of an outer ring. It is a figure for demonstrating the 1st aspect of 5th Embodiment of the rolling bearing which concerns on this invention. It is AA sectional view taken on the line of FIG. It is a figure for demonstrating the 2nd aspect of 5th Embodiment. It is AA sectional view taken on the line of FIG. It is a figure for demonstrating the 3rd aspect of 5th Embodiment. It is AA sectional view taken on the line of FIG. It is the BB sectional view taken on the line of FIG. It is a figure for demonstrating the 4th aspect of 5th Embodiment. It is the sectional view on the AA line of FIG. It is a figure for demonstrating the 5th aspect of 5th Embodiment. It is the sectional view on the AA line of FIG. FIG. 30 is a sectional view taken along line B-B in FIG. 29. It is a figure for demonstrating the 6th aspect of 5th Embodiment. It is AA sectional view taken on the line of FIG. It is a figure for demonstrating the 7th aspect of 5th Embodiment. It is the sectional view on the AA line of FIG. FIG. 35 is a sectional view taken along line BB in FIG. 34. It is sectional drawing for demonstrating 6th Embodiment of the rolling bearing which concerns on this invention. FIG. 38 is a perspective view of a vibration-proof layer used for the rolling bearing shown in FIG. 37. It is a perspective view for demonstrating the 1st modification of a vibration-proof layer. It is a perspective view for explaining the 2nd modification of a vibration proof layer. It is a perspective view for demonstrating the 3rd modification of a vibration-proof layer. It is a perspective view for demonstrating the 4th modification of a vibration-proof layer. It is sectional drawing for demonstrating the conventional rolling bearing used for the rotation support part of the transmission for motor vehicles.

Explanation of symbols

10, 20, 30, 40, 50A to 50E, 60 Rolling bearing 11 Outer ring 11a Outer ring raceway surface 12 Inner ring 12a Inner ring raceway surface 13 Ball (rolling element)
14, 24, 34, 44, 54A to 54E, 64 Vibration-proof layer 15 Male threaded portion 16 Female threaded portion 17 Pin hole 18 Stop pin 35 Recessed portion 36 Convex portion 155 Axial concave portion 156 Axial convex portion 165 Circumferential concave portion 166 Direction convex part 175 Axial concave part 176 Axial convex part

Claims (11)

An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing comprising at least a vibration-proof layer provided on the outer peripheral surface of the outer ring,
A male screw-like portion is formed on the outer peripheral surface of the outer ring, and a female screw-like portion corresponding to the male screw-like portion is formed on the inner peripheral surface of the vibration-proof layer, and the male screw-like portion of the outer ring and the vibration-proof layer A rolling bearing characterized by screwing a female threaded portion. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing comprising at least a vibration-proof layer provided on the outer peripheral surface of the outer ring,
A rolling bearing, wherein the vibration-proof layer is formed in a polygonal cylindrical shape or a multi-arc cylindrical shape. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing comprising at least an anti-vibration layer provided on an outer peripheral surface and an axial end surface of the outer ring,
A plurality of convex portions or concave portions are formed on the outer ring, and concave portions or convex portions corresponding to the convex portions or concave portions of the outer ring are formed on the vibration-proof layer, and the outer ring and the vibration-proof layer are concavo-convexly fitted. A rolling bearing characterized by that. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing comprising: a circumferential surface on a side away from a raceway surface of at least one of the outer ring and the inner ring; and a vibration-proof layer provided on an end surface in the axial direction of the raceway,
A rolling bearing characterized by dividing the vibration-proof layer into two or more and laminating two or more of the vibration-proof layers. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing comprising at least a vibration-proof layer provided on the outer peripheral surface of the outer ring,
A rolling bearing comprising a fixing means for dividing the vibration isolation layer in a radial direction and fixing the vibration isolation layer to the outer ring.   The rolling bearing according to claim 5, wherein the vibration-proof layer is formed in a U-shaped cross section and disposed on the outer peripheral surface and both axial end surfaces of the outer ring.   A convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and a concave portion or a convex portion corresponding to the convex portion or the concave portion of the outer peripheral surface of the outer ring is formed on the vibration isolation layer, and the outer ring and the anti-shock The rolling bearing according to claim 5 or 6, wherein the vibration layer is unevenly fitted.   The vibration-proof layer is formed in a cylindrical shape and disposed on the outer peripheral surface of the outer ring, and a convex portion or a concave portion along the circumferential direction is formed on the outer peripheral surface of the outer ring, and the outer peripheral surface of the outer ring is formed on the vibration-proof layer. The rolling bearing according to claim 5, wherein a concave portion or a convex portion corresponding to the convex portion or the concave portion is formed, and the outer ring and the vibration-proof layer are engaged with each other.   A convex portion or a concave portion along the axial direction is formed on the outer peripheral surface of the outer ring, and a concave portion or a convex portion corresponding to the convex portion or the concave portion of the outer peripheral surface of the outer ring is formed on the vibration isolation layer, and the outer ring and the anti-shock The rolling bearing according to claim 8, wherein the vibration layer is unevenly fitted.   10. A pin hole is formed in the outer ring and the vibration isolating layer, and a retaining pin is inserted into the pin hole to fix the outer ring and the vibration isolating layer. Rolling bearing according to item. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolling elements interposed between the outer ring raceway surface and the inner ring raceway surface in a freely rollable manner; A rolling bearing provided with at least a ring-shaped vibration-proof layer provided on the outer peripheral surface of the outer ring,
A rolling bearing characterized in that a part of the vibration-proof layer in the circumferential direction is cut to give a spring function to the vibration-proof layer.

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