JP2015031370A - Cage for rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cage in which segments are hardly separated in assembling a rolling bearing.SOLUTION: An annular cage is constituted by alternately disposing first circular arc-shaped segments 41 and second circular arc-shaped segments 141. The first circular arc-shaped segments 41 have outer-side projecting portions 71 projecting radially outward at one side in a circumferential direction, and have inner-side projecting portions 81 projecting radially inward at the other side in the circumferential direction. The second circular arc-shaped segments 141 have through-holes 171, 181 at both sides in the circumferential direction. The outer-side projecting portions 71 of the first circular arc-shaped segments 41 are inserted into holes 181 of the second circular arc-shaped segments 141 from the radial inner side, and inner-side projecting portions 81 of the first circular arc-shaped segments 41 are inserted to holes 171 of the second circular arc-shaped segments 141 from the radial outer side.

Description

  The present invention relates to a cage for a rolling bearing.

  It is known that it is difficult to produce a ring-integrated rolling bearing cage for a large-sized rolling bearing for a wind power generator or a nuclear magnetic resonance apparatus. Conventionally, as a rolling bearing retainer (hereinafter simply referred to as a retainer) used for this type of large-sized rolling bearing, there is one described in Japanese Patent No. 4748145 (Patent Document 1). The cage includes a plurality of identical arc-shaped segments that can be arranged on a virtual circle, and each arc-shaped segment has a convex portion projecting in the circumferential direction or the radial direction on one side in the circumferential direction. The other side of the direction has a recess recessed in the circumferential direction or the radial direction.

  While engaging the convex portion of each arc-shaped segment and the concave portion of the segment located on one side in the circumferential direction of the arc-shaped segment, the concave portion of each arc-shaped segment and the circumferential direction of the arc-shaped segment The convex part of the segment located in the other side is engaged. In this way, the plurality of arc-shaped segments are integrated.

  The concave portion penetrates the segment in the radial direction of the virtual circle, or penetrates the segment in the axial direction of the virtual circle. This cage has a shape that penetrates the concave portion in the radial direction or the axial direction, so that one arc-shaped segment adjacent in the circumferential direction is arranged in the radial direction or the axial direction with respect to the other arc-shaped segment. The two segments are moved relative to each other so that they can be easily engaged.

  However, in the conventional cage described above, the relative movement in the radial direction or the axial direction of the other segment with respect to one segment in the circumferentially adjacent segment cannot be restricted. Therefore, when assembling the rolling bearing having this cage, The segments are easily separated from each other, and the rolling bearing may not be assembled smoothly.

Japanese Patent No. 4748145 (No. 2, 3 (b), FIG. 4)

  Accordingly, an object of the present invention is to provide a cage in which segments are difficult to separate when a rolling bearing is assembled.

In order to solve the above problems, the cage of the present invention is:
With multiple arc segments that can be placed on a virtual circle,
The plurality of arc-shaped segments include a first arc-shaped segment and a second arc-shaped segment,
The first arc-shaped segments and the second arc-shaped segments are alternately arranged in the circumferential direction on the virtual circle,
The first arcuate segment is located in a pocket in which the rolling elements are arranged, and one end portion in the circumferential direction of the virtual circle, and the radial direction from the radially outer surface of the virtual circle at one end portion thereof. An outward projecting portion projecting outward and an inward projecting from the radially inner surface of the other end to the radially inward side at the other end portion in the circumferential direction Side protrusions,
The second arcuate segment includes a pocket in which a rolling element is disposed, one or more one-side holes located at one end in the circumferential direction and extending in a direction including the radial direction, and the other end in the circumferential direction One or more other side holes extending in a direction including the radial direction located in the portion,
The outward projecting portion of each first arc segment is inserted from the radially inner side into the other side hole of the second arc segment, while the first arc segment The inward projecting portion is inserted into the one side hole of the second arc segment from the radially outer side.

  The phrase “the first arc-shaped segment and the second arc-shaped segment are alternately arranged in the circumferential direction on the virtual circle” means that both end portions in the circumferential direction of the first arc-shaped segment If the center part other than the center part other than the both ends in the circumferential direction of the second arc-shaped segment are alternately arranged in the circumferential direction of the virtual circle, it is satisfied.

  According to the present invention, the outward and inward protrusions of each first arc segment are inserted through the holes on one side and the other side of the second arc segment, so that the second arc segment The outer side and inner side protrusions can be constrained on the inner peripheral surfaces of the holes on the one side and the other side, and the first arcuate segment moves relative to the second arcuate segment indefinitely in the axial direction of the virtual circle Can be prevented. Therefore, it is possible to prevent the first arc-shaped segment from moving relative to the second arc-shaped segment in the axial direction without any limitation and separating from the second arc-shaped segment in the axial direction.

  Further, according to the present invention, the outward projecting portion of each first arc segment is inserted through the other side hole of the second arc segment from the radially inward side, while each first arc segment The inward protruding portion of the segment is inserted from the radially outer side into the one side hole of the second arcuate segment.

  Therefore, even if the first arcuate segment is going to move outward in the radial direction, the first arcuate segment has the other side hole with which the outward projection of the first arcuate segment engages. A radially inward force is received from the second arc segment. Therefore, the first arc segment does not leave from the radially outer side.

  In addition, even if the first arc-shaped segment tries to move inward in the radial direction, the first arc-shaped segment has one side hole with which the inward protruding portion of the first arc-shaped segment engages. A radially outward force is received from the second arc segment. Therefore, the first arc segment does not leave from the radially inner side.

  In addition, even if the second arc-shaped segment tries to move outward in the radial direction, the second arc-shaped segment has an inward protruding portion that engages with one side hole of the second arc-shaped segment. A radially inward force is received from the first arc segment. Therefore, the second arc segment does not leave from the radially outer side.

  In addition, even if the second arcuate segment is going to move inward in the radial direction, the second arcuate segment has an outward protruding portion that engages with the other side hole of the second arcuate segment. A radially outward force is received from the first arc segment. Therefore, the second arc segment does not leave from the radially outer side.

  Therefore, it is possible to prevent the first arc-shaped segment from moving relative to the second arc-shaped segment without limitation in the radial direction and separating from the second arc-shaped segment in the radial direction.

  Therefore, according to the present invention, the second arc-shaped segment moves relative to the first arc-shaped segment without limitation in the axial direction or the radial direction, and the second arc-shaped segment is separated from the first arc-shaped segment. Therefore, it is possible to greatly suppress the separation of the cage during the assembly of the rolling bearing. Therefore, the rolling bearing provided with this cage can be assembled smoothly, and the cycle time can be shortened in a large-sized rolling bearing that has a cage composed of a plurality of segments.

In one embodiment,
The outward protrusion includes a first outward protrusion and a second outward protrusion that is spaced from the first outward protrusion in the axial direction of the virtual circle. ,
The inward protrusion includes a first inward protrusion and a second inward protrusion that is spaced from the first inward protrusion in the axial direction.
The one side hole has one side first hole and one side second hole located in the one side first hole at a distance in the axial direction,
The said other side hole has the other side 1st hole and the other side 2nd hole located in the other side 1st hole at intervals in the said axial direction.

  According to the above embodiment, each of the outer side protruding portion and the inner side protruding portion has two portions that are spaced apart in the axial direction, and each of the one side hole and the other side hole is also Since the two holes are spaced apart from each other in the axial direction, the second arcuate segment can be prevented from swinging in the axial direction with respect to the first arcuate segment. Therefore, the behavior of the cage can be stabilized.

  If each of the outer side protruding portion and the inner side protruding portion is composed of only one part, and each of the one side hole and the other side hole is composed of only one hole, the first arc segment is It is not possible to reliably prevent the second arcuate segment from rotating about the outer protrusion or the inner protrusion, and the cage swings in the axial direction. There is a possibility that the behavior of the above becomes unstable.

In one embodiment,
The outward protrusion is movable relative to the other side hole in the circumferential direction,
The inward protruding portion is relatively movable in the circumferential direction with respect to the one side hole.

  According to the above-described embodiment, the outer side protrusion is relatively movable in the circumferential direction with respect to the other side hole, and the inner side protrusion is also relative to the one side hole in the circumferential direction. It is movable. Therefore, the expansion and contraction of the cage based on the thermal expansion and thermal contraction of the cage can be absorbed by the engagement between the outer side protruding portion and the other side hole, and the engagement between the inner side protruding portion and the one side hole, It is possible to suppress undesired stress from being generated in the cage.

  According to the present invention, it is possible to realize a cage in which segments are difficult to separate when a rolling bearing is assembled.

It is a schematic cross section of the axial direction of the tapered roller bearing of one Embodiment of this invention. It is a perspective view of the 1st circular arc segment of a maintenance machine. It is a perspective view of the 2nd circular arc segment of a maintenance machine. It is a part of schematic sectional drawing of the radial direction of the holder | retainer of this embodiment, and is the cut surface which passes through the center axis | shaft of the 1st outer side protrusion part and the center axis | shaft of a 1st inner side protrusion part in a holder | retainer. It is a part of schematic sectional drawing.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view in the axial direction of a tapered roller bearing according to an embodiment of the present invention.

  This tapered roller bearing is a large tapered roller bearing that can be used to support the main shaft of a wind power generator. As shown in FIG. 1, the tapered roller bearing includes an outer ring 1, an inner ring 2, a plurality of tapered rollers 3, and a cage 4. The tapered roller 3 constitutes a rolling element. The outer ring 1 has an inner circumferential conical raceway surface 11, while the inner ring 2 has an outer circumferential conical raceway surface 21, a large collar part 22, and a small collar part 23.

  The large collar portion 22 is located on the large diameter side in the axial direction of the outer circumferential conical raceway surface 21, while the small collar portion 23 is located on the small diameter side in the axial direction of the outer circumferential conical raceway surface 21. The large collar portion 22 has a roller guide surface 28 that guides the large end surface of the tapered roller 3. The plurality of tapered rollers 3 are spaced apart from each other in the circumferential direction while being held by the retainer 4 between the inner peripheral conical raceway surface 11 of the outer ring 1 and the outer peripheral conical raceway surface 21 of the inner ring 2. positioned.

  The cage 4 is composed of a plurality of segments. The plurality of segments can be arranged on a virtual circle. As will be described in detail later, the plurality of segments include a first arc-shaped segment and a second arc-shaped segment. By configuring the cage 4 with a plurality of segments, even with a large tapered roller bearing in which it is difficult to integrally mold the cage 4, the cage 4 can be held by the cage 4, and the tapered rollers can be brought into contact with each other. This prevents the tapered roller 3 from rolling smoothly.

  FIG. 2 is a perspective view of the first arcuate segment 41 of the cage 4.

  When the first arc segment 41 is arranged on the virtual circle, when the first arc segment 41 is viewed from the outside in the axial direction of the virtual circle, the first arc segment 41 has an arc shape. Have Each of the first arc-shaped segments 41 includes a first arc-shaped portion 42, a second arc-shaped portion 43, and a plurality of column portions 45, and each column portion 45 includes the first arc-shaped portion 42 and the first arc-shaped portion 42. Two arcuate portions 43 are connected. The plurality of column portions 45 are located at intervals in the circumferential direction of the arc of the first arc-shaped portion 42.

  Each first arc segment 41 has a plurality of pockets 46. Each of the pockets 46 is located between the column portions 45 adjacent to each other in the circumferential direction of the virtual circle. The said pocket 46 accommodates the tapered roller 3 (refer FIG. 1).

  As shown in FIG. 2, the first arcuate segment 41 includes a first side connecting portion 50 and a second side connecting portion 60. The one side connecting portion 50 is located at one end portion on one side in the circumferential direction of the arc of the first arc-shaped segment 41 indicated by an arrow A in FIG. 2, while the other side connecting portion 60 is arranged in the circumferential direction of the arc. Located at the other end. The one-side connecting portion 50 has a first-side first circumferential protrusion 53 and a first-side second circumferential protrusion 54. Each of the one-side first circumferential protrusion 53 and the one-side second circumferential protrusion 54 is circumferential from the radially inner side portion of the end face on one side in the circumferential direction of the first arcuate segment 41. It extends in the circumferential direction on one side. The one-side first circumferential protrusion 53 is positioned at an axial distance from the one-side second protrusion 54. The one-side first circumferential protrusion 53 has substantially the same shape and size as the one-side second circumferential protrusion 54. The one-side first circumferential protrusion 53 overlaps the one-side second circumferential protrusion 54 in the axial direction.

  As shown in FIG. 2, the one-side first circumferential protrusion 53 has a first outer protrusion 71, and the one second circumferential protrusion 54 is a second outer protrusion 72. Have The first outer projecting portion 71 projects radially outward from the radially outer end face of the first first circumferential projecting portion 53, and the second outer projecting portion 72. Are projecting radially from the radially outer end face of the one-side second circumferential projecting portion 54 radially outward. The first outer protrusion 71 has substantially the same shape and size as the second outer protrusion 72. The first outer projecting portion 71 overlaps the second outer projecting portion 72 in the axial direction. The said 1st outward side protrusion part 71 and the 2nd outward side protrusion part 72 comprise the outward side protrusion part.

  On the other hand, the other-side connecting portion 60 includes the other-side first circumferential protrusion 63 and the other-side second circumferential protrusion 64. Each of the other first circumferential protrusion 63 and the second circumferential protrusion 64 on the other side is a circumferential direction from the radially outer portion of the other end face of the first arcuate segment 41 in the circumferential direction. It extends in the circumferential direction on the other side. The other-side first circumferential protrusion 63 is positioned at an axial distance from the other-side second circumferential protrusion 64. The other-side first circumferential protrusion 63 has substantially the same shape and size as the other-side second circumferential protrusion 64. The other-side first circumferential protrusion 63 overlaps the other-side second circumferential protrusion 64 in the axial direction.

  As shown in FIG. 2, the other first circumferential protrusion 63 has a first inner protrusion 81, and the second second circumferential protrusion 64 has a second inner protrusion 82. Have The first inward projecting portion 81 projects radially from the radially inner end face of the other first circumferential projecting portion 63 to the radially inward side, and the second inward projecting portion 82. Is projecting radially inward from the radially inner end surface of the second circumferential protrusion 64 on the other side radially inward. The first inward protrusion 81 has substantially the same shape and size as the second inward protrusion 82. The first inward projecting portion 81 overlaps the second inward projecting portion 82 in the axial direction. The first inward protrusion 81 and the second inward protrusion 82 constitute an inward protrusion.

  FIG. 3 is a perspective view of the second arc segment 141 of the cage 4.

  The second arcuate segment 141 is different from the first arcuate segment 41 in the structure of the one-side connecting part 150 and the other-side connecting part 160, but the other structure is the same as that of the first segment 41. The description of the structure other than the structures of the one-side connecting portion 150 and the other-side connecting portion 160 of the second arc-shaped segment is omitted with the description of the first arc-shaped segment 41.

  As shown in FIG. 3, the one-side connecting portion 150 is located at one end portion on one side in the circumferential direction of the arc of the second arc-shaped segment 141 shown by the arrow B in FIG. 3. The one-side connecting portion 150 includes a first-side first circumferential protrusion 153 and a first-side second circumferential protrusion 154. Each of the one-side first circumferential protrusion 153 and the one-side second circumferential protrusion 154 is formed from a radially inner portion of one end surface in the circumferential direction of the arc of the second arc-shaped segment 141. It extends in the circumferential direction on one side in the circumferential direction. The one-side first circumferential protrusion 153 is positioned at an axial distance from the one-side second circumferential protrusion 154. The one-side first circumferential protrusion 153 has substantially the same shape and size as the one-side second circumferential protrusion 154. The one-side first circumferential protrusion 153 overlaps the one-side second circumferential protrusion 154 in the axial direction.

  As shown in FIG. 3, the one-side first circumferential protrusion 153 has a one-side first through hole 171 as the one-side first hole, and the one-side second circumferential protrusion 154 is one-side. One side second through hole 172 as a second hole is provided. Each of the one side first through hole 171 and the one side second through hole 172 extends in the radial direction of the arc of the second arc segment 141 and penetrates the second arc segment 141. The one side first through hole 171 has substantially the same shape and size as the one side second through hole 172. The one side first through hole 171 overlaps the one side second through hole 172 in the axial direction. The one side first through hole 171 is located at an axial distance from the one side second through hole 172. The one side first through hole 171 and the one side second through hole 172 constitute one side through hole as the one side hole.

  On the other hand, the other side connecting portion 160 is located at the other end portion on the other side in the circumferential direction of the arc of the second arcuate segment 41. The other-side connecting portion 160 includes the other-side first circumferential protrusion 163 and the other-side second circumferential protrusion 164. Each of the other side first circumferential protrusion 163 and the other side second circumferential protrusion 164 is circumferentially directed from the radially outer portion of the other end surface of the second arcuate segment 141 in the circumferential direction. It extends in the circumferential direction on the other side. The said other side 1st circumferential direction protrusion part 163 is located in the axial direction at intervals with respect to the other side 2nd circumferential direction protrusion part 164. As shown in FIG. The other-side first circumferential protrusion 163 has substantially the same shape and size as the other-side second circumferential protrusion 164. The other-side first circumferential protrusion 163 overlaps the other-side second circumferential protrusion 164 in the axial direction.

  As shown in FIG. 3, the other first circumferential protrusion 163 has the other first through hole 181 as the other first hole, and the second second circumferential protrusion 164 is the other side. It has the other side 2nd through hole 182 as a 2nd hole. Each of the other first through hole 181 and the other second through hole 182 extends in the radial direction of the arc of the second arc segment 141 and penetrates the second arc segment 141. The other side first through hole 181 has substantially the same shape and size as the other side second through hole 182. The other side first through hole 181 overlaps the other side second through hole 182 in the axial direction. The other side first through hole 181 is located at an axial distance from the other side second through hole 182. The other side first through hole 181 and the other side second through hole 182 constitute the other side through hole as the other side hole.

  Referring to FIG. 2 again, the first and second outer projecting portions 71 and 72 constituting the outer projecting portion have a columnar shape, and the first and second projecting portions constituting the inner projecting portion. The second inward projecting portions 81 and 82 are also cylindrical. These four protrusions 71, 72, 81, 82 have the same cross section and length. In addition, referring to FIG. 3, one side first and second through holes 171 and 172 constituting one side through hole are in the shape of an elongated hole and the other side first hole constituting the other side through hole. The first and second through holes 181 and 182 are also in the shape of oblong cross sections. These four through holes 171, 172, 181, and 182 have the same cross section and length.

  For example, the cross section of the other first through hole 181 is larger than the cross section of the first outer protrusion 71, and the first outer protrusion 71 can be accommodated in the other first through hole 181. It has become. Further, the first outer protrusion 71 is movable relative to the other first through hole 181 in the circumferential direction. The length of the other first through-hole 181 in the extending direction is longer than the length of the first outer protrusion 71 in the extending direction.

  FIG. 4 is a part of a schematic cross-sectional view in the radial direction of the cage 4 of the present embodiment, and the center axis of the first outer side protruding portion 71 and the center of the first inner side protruding portion 81 in the cage 4. It is a part of schematic cross section in the cut surface which passes along an axis | shaft.

  As shown in FIG. 4, the cage includes four identical first arcuate segments 41 and four identical second arcuate segments 141. In this cage, the first arc segment 41 and the second arc segment 141 are alternately arranged on a virtual circle. The first outward projecting portion 71 of each of the first arc-shaped segments 41 is in the other first through-hole 181 of the second arc-shaped segment 141 existing on one side in the circumferential direction of the first arc-shaped segment 41. While being inserted from the inner side in the axial direction, the second outer side protruding portion 72 of each first arc segment 41 has a second arc shape existing on one side in the circumferential direction of the first arc segment 41. The other side second through hole 182 of the segment 141 is inserted from the inner side in the axial direction.

  Further, the first inward protruding portion 81 of each first arc segment 41 has a first through hole on one side of the second arc segment 141 existing on the other circumferential side of the first arc segment 41. The second inward protruding portion 82 of each first arcuate segment 41 is inserted into the second arcuate segment 41 on the other side in the circumferential direction. The one side second through hole 172 of the arc segment 141 is inserted from the outer side in the axial direction.

  In this way, the one side connecting portion 50 of each first arcuate segment 41 and the other side connecting portion 160 of the second arcuate segment 141 are connected, and the other side connecting portion of each first arcuate segment 41 is connected. 60 and the one side connection part 150 of the 2nd circular arc segment 141 are connected, and the cyclic | annular holder | retainer 4 is comprised.

  According to the above embodiment, the first and second outward projecting portions 71 and 72 of the first arcuate segment 41 are inserted into the other first and second through holes 181 and 182 of the second arcuate segment 141. The first and second inward protruding portions 81 and 82 of the first arcuate segment 41 are inserted into the first and second through holes 171 and 172 on the one side of the second arcuate segment 141. Therefore, the outer side and inner side protrusions 71, 72, 81, 82 can be restrained on the inner peripheral surfaces of the one side and the other side through holes 171, 172, 181, 182 of the second arcuate segment 141, and the first It is possible to prevent the arc-shaped segment 41 from moving relative to the second arc-shaped segment 141 without limitation in the axial direction of the virtual circle. Therefore, the first arc-shaped segment 41 can be prevented from separating in the axial direction with respect to the second arc-shaped segment 141 by moving in an axially unlimited manner relative to the second arc-shaped segment 141.

  Further, according to the above embodiment, the first and second outward projecting portions 71 and 72 of the first arcuate segments 41 are connected to the other first and second through holes 181 and the other side of the second arcuate segment 141, respectively. The first and second inwardly protruding portions 81 and 82 of the first arcuate segments 41 are inserted into the 182 from the radially inner side, while the first and second inwardly protruding portions 81 and 82 of the first arcuate segments 41 The second through holes 171 and 172 are inserted from the radially outer side.

  Therefore, even if the first arcuate segment 41 is about to move outward in the radial direction, the first arcuate segment 41 is the first and second outer protrusions 71 of the first arcuate segment 41. , 72 is subjected to a radially inward force from the second arcuate segment 141 having the first and second through holes 181 and 182 on the other side with which the second and second holes 72 are engaged. Therefore, the first arc-shaped segment 41 does not leave from the radially outer side.

  Further, even if the first arcuate segment 41 is about to move inward in the radial direction, the first arcuate segment 41 is the first and second inward protrusions 81 of the first arcuate segment 41. , 82 are subjected to a radially outward force from the second arcuate segment 141 having the first and second through holes 171, 172 on the one side. Therefore, the first arc-shaped segment 141 is not detached from the radially inner side.

  Further, even if the second arcuate segment 141 tries to move outward in the radial direction, the second arcuate segment 141 is connected to the first and second through holes 171 on one side of the second arcuate segment 141. A radially inward force is received from the first arcuate segment 41 having the first and second inward protruding portions 81 and 82 with which the 172 is engaged. Therefore, the second arcuate segment 141 is not detached from the radially outer side.

  Further, even if the second arcuate segment 141 tries to move inward in the radial direction, the second arcuate segment 141 is connected to the first and second through holes 181 on the other side of the second arcuate segment 141. A radially outward force is received from the first arcuate segment 41 having the first and second outward projections 71 and 72 with which the 182 engages. Therefore, the second arcuate segment 141 is not detached from the radially outer side.

  Therefore, it is possible to prevent the first arc-shaped segment 41 from being separated in the radial direction with respect to the second arc-shaped segment 141 by moving relative to the second arc-shaped segment 141 without limitation in the radial direction.

  Therefore, according to the above-described embodiment, the second arcuate segment 141 moves relative to the first arcuate segment 41 in an axial direction and a radial direction without limitation, and the second arcuate segment 41 is moved relative to the first arcuate segment 41. Since the segment 141 does not separate, it is possible to greatly suppress the separation of the cage 4 during assembly of the rolling bearing. Therefore, the rolling bearing provided with the cage 4 can be assembled smoothly, and the cycle time can be shortened in a large-sized rolling bearing that has a cage composed of a plurality of segments.

  Further, according to the embodiment, each of the outer side protruding portions 71 and 72 and the inner side protruding portions 81 and 82 has two portions that are spaced apart from each other in the axial direction, and passes through one side. Since the holes 171 and 172 and the other side through holes 181 and 182 also have two through holes that are spaced apart in the axial direction, the second arcuate segment 141 swings in the axial direction with respect to the first arcuate segment 41. Can be prevented. Therefore, the behavior of the cage 4 can be stabilized.

  If each of the outer side protrusion and the inner side protrusion is composed of only one part, and each of the one side hole and the other side hole is composed of only one hole, the first arc segment is It is not possible to reliably prevent the second arcuate segment from rotating about the outer protrusion or the inner protrusion, and the cage swings in the axial direction. There is a possibility that the behavior of the above becomes unstable.

  Further, according to the above embodiment, the outer side protrusions 71 and 72 are relatively movable in the circumferential direction with respect to the other side through holes 181 and 182, and the inner side protrusions 81 and 82 are also configured. The one side through holes 171 and 172 are movable relative to each other in the circumferential direction. Therefore, the expansion and contraction of the cage 4 based on the thermal expansion and the thermal contraction of the cage 4 is caused by the engagement between the outer side protruding portions 71 and 72 and the other side through holes 181 and 182 or the inner side protruding portions 81 and 82. And the one-side through holes 171 and 172 can be absorbed, and it is possible to suppress undesired stress from being generated in the cage 4.

  In the above-described embodiment, the four first arc-shaped segments 41 are all the same. However, in the present invention, one of the outer-side protruding portion and the inner-side protruding portion of one first arc-shaped segment is the same. The height of at least one protrusion may be lower than the height of at least one of the outer and inner protrusions of the other first arc segment. In this case, the one first arcuate segment is incorporated last, or at least one of the outward and inward protrusions of the first arcuate segment having a lower height than the others. It is preferable that the retainer can be assembled more easily by incorporating the second arc-shaped segment having the hole engaged with the protrusion at the end.

  In the above embodiment, each of the connecting portions 50, 60, 150, 160 has the two circumferential protrusions 53, 54, 63, 64, 153, 154, 163, 164. The structure which has one connection part or three or more circumferential direction protrusion parts may be sufficient as one connection part.

  In the above embodiment, each of the one side through holes 171 and 172 and the other side through holes 181 and 182 of the second arcuate segment 141 has two through holes 171, 172, 181 and 182. In the invention, at least one of the one side through hole and the other side through hole of the second arc-shaped segment may have only one or three or more through holes. Similarly, in the above-described embodiment, each of the outer protrusions 71 and 72 and the inner protrusions 81 and 82 of the first arcuate segment 41 has two protrusions 71, 72, 81, and 82. However, in the present invention, at least one of the outer side protruding portion and the inner side protruding portion of the first arcuate segment may have only one or three or more protruding portions. And each protrusion part of a 1st circular-arc-shaped segment may be inserted in only one or three or more each through-hole.

  In the above embodiment, all of the holes used by the second arc segment 141 for engagement with the first arc segment 41 are the through holes 171, 172, 181, 182, but in the present invention, At least one of the holes used for engagement of the second arc segment with the first arc segment may be a bottomed hole.

  In the above embodiment, only one projecting portion 71, 72, 81, 82 is inserted into each of the through holes 171, 172, 181, 182 of the second arcuate segment 141. Two protrusions of the first arcuate segment may be disposed at an interval in at least one hole of the second arcuate segment.

  Moreover, in the said embodiment, all the four 1st circular arc segments 41 were the same, and all the four 2nd circular arc segments 141 were the same. However, in the present invention, there may be two or more first arc segments different from each other. For example, there are two or more first arc segments having different numbers of pockets and different circumferential lengths. May be. Similarly, in the present invention, there may be two or more second arc segments different from each other, for example, two or more second arc segments having different numbers of pockets and different circumferential lengths. May exist. In short, in the present invention, if the first arc-shaped segment having the projecting portion and the second arc-shaped segment having the hole can be alternately arranged to form an annular cage, each of the first and second The arc segment may have any structure.

  Further, in the above embodiment, the cage 4 is configured by the eight arc-shaped segments 41 and 141. However, in the present invention, the cage is configured by any number of arc-shaped segments as long as it is an even number. Also good.

  In the above embodiment, each of the first and second arc-shaped segments 41, 141 has four pockets 46. However, in the present invention, each arc-shaped segment has any number of pockets. Also good.

  In the above embodiment, the protrusions 71, 72, 81, 82 have a circular cross-sectional shape, and the through holes 171, 172, 181, 182 have a cross-sectional oblong shape. The protrusion may be a protrusion having any shape such as a semicircle, a rectangle, a polygon, an ellipse, and the hole may have any shape such as a semicircle, a rectangle, a polygon, an ellipse, or the like. It may be a protruding part.

  In the above embodiment, the through holes 171, 172, 181, and 182 extend substantially strictly in the radial direction of the virtual circle, and the protrusions 71, 72, 81, and 82 also extend substantially strictly in the radial direction. Was. However, in the present invention, at least one hole used for engagement of the arc-shaped member may extend in any direction as long as it has a radially extending component, for example, it is inclined in the radial direction. It may extend in the direction of Similarly, in the present invention, at least one protrusion used for engaging the arc-shaped member may extend in any direction as long as it has a radially extending component. You may extend in the direction which inclines to radial direction.

  Moreover, in the said embodiment, although the holder | retainer 4 hold | maintained the tapered roller 3, in this invention, a holder | retainer may hold | maintain a cylindrical roller, a convex roller (spherical roller), a ball | bowl, or other rolling elements. good.

  Of course, it is possible to form a new embodiment by combining two or more of the configurations described in the above embodiments and modifications. In addition, it goes without saying that the present invention can be used for a wind power generator and a nuclear magnetic resonance apparatus, but the present invention can be applied to any cage having a plurality of segments, and there is no limitation in use. Yes.

4 Cage 41 First Arc Segment 71 First Outward Projection 72 Second Outward Projection 81 First Inner Projection 82 Second Inner Projection 141 Second Arc Segment 171 One Side First through hole 172 One side second through hole 181 The other side first through hole 182 The other side second through hole

Claims (3)

With multiple arc segments that can be placed on a virtual circle,
The plurality of arc-shaped segments include a first arc-shaped segment and a second arc-shaped segment,
The first arc-shaped segments and the second arc-shaped segments are alternately arranged in the circumferential direction on the virtual circle,
The first arcuate segment is located in a pocket in which the rolling elements are arranged, and one end portion in the circumferential direction of the virtual circle, and the radial direction from the radially outer surface of the virtual circle at one end portion thereof. An outward projecting portion projecting outward and an inward projecting from the radially inner surface of the other end to the radially inward side at the other end portion in the circumferential direction Side protrusions,
The second arcuate segment includes a pocket in which a rolling element is disposed, one or more one-side holes located at one end in the circumferential direction and extending in a direction including the radial direction, and the other end in the circumferential direction One or more other side holes extending in a direction including the radial direction located in the portion,
The outward projecting portion of each first arc segment is inserted from the radially inner side into the other side hole of the second arc segment, while the first arc segment The retainer, wherein the inwardly protruding portion is inserted from the radially outward side into the one side hole of the second arcuate segment. The cage of claim 1,
The outward protrusion includes a first outward protrusion and a second outward protrusion that is spaced from the first outward protrusion in the axial direction of the virtual circle. ,
The inward protrusion includes a first inward protrusion and a second inward protrusion that is spaced from the first inward protrusion in the axial direction.
The one side hole has one side first hole and one side second hole located in the one side first hole at a distance in the axial direction,
The above-mentioned other side hole has the other side 1st hole, and the other side 1st hole, and the other side 2nd hole located in the above-mentioned axial direction at intervals. The cage according to claim 1 or 2,
The outward protrusion is movable relative to the other side hole in the circumferential direction,
The cage, wherein the inward protruding portion is relatively movable in the circumferential direction with respect to the one side hole.

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