JP2011075012A - Dividable outer ring of bearing, bearing provided with dividable outer ring, and ring member for dividable outer ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dividable outer ring having a snap ring in a simple shape, and allowing the snap ring to be easily fit onto outer ring segments. <P>SOLUTION: The dividable outer ring 11 of a bearing includes: a plurality of the outer ring segments 12 and a ring member 17. Each of the outer ring segments 12 has an arcuate shape in which the outer ring of the bearing is divided in the circumferential direction, and has an outer circumferential groove 15 extending in the circumferential direction on an outer circumferential surface 14. The outer circumferential groove 15 has a cross-sectional shape with a groove width narrowing toward a groove bottom 15b. The ring member 17 has an arcuate shape more than 180° in the circumferential direction and a circular cross-sectional shape, fits into the outer circumferential groove 15, and comes in contact with both side surfaces 19 of the outer circumferential groove 15 so as to retain the plurality of the outer ring segments 12 in the state arranged in the shape of the outer ring of the bearing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a split outer ring of a bearing that rotatably supports a crankshaft of an internal combustion engine on a crankcase.

  The crankshaft of the engine is connected to the piston via a connecting rod, and converts the reciprocating motion of the piston into rotational motion. Such a crankshaft has a complicated shape, and in an automobile engine or the like, an assembly structure in which a crankshaft is mounted between a bearing base body and a covering member of an engine crankcase and the crankshaft is rotatably supported inside the crankcase. Therefore, a split outer ring divided into two is used as a support bearing for the crankshaft. The split outer ring is divided into two semicircular arc-shaped outer ring segments in advance, and the split surfaces of these two outer ring segments are usually split naturally without cutting allowance and unlikely to occur. A retaining ring groove is formed on the outer peripheral surface of the split outer ring. A retaining ring that temporarily holds the two outer ring divided bodies in the original divided outer ring state is fitted into the retaining ring groove.

  Conventionally, a C-shaped snap ring has been used as the retaining ring. However, since the cross-sectional shape of the retaining groove is sufficiently larger than the sectional shape of the snap ring, there is a gap between the snap ring and the retaining groove. It was happening. In particular, even when the snap ring is in close contact with the groove bottom of the stop groove without a radial opening, a gap that is open in the axial direction is generated. For this reason, there are cases where the two outer ring divided bodies move relative to each other by the gap described above, and there is a problem that the split surface is displaced due to the weight of the outer ring divided body or an impact during assembly.

  In addition, the outer periphery of the split outer ring is surrounded by a bearing base, and the split outer ring is attached and fixed to the crankcase. As a result, fretting occurs on the mating surface of the split outer ring and the bearing base, and abnormal noise and wear occur. This is because a gap is formed in the fitting surface due to the difference in thermal expansion between the split outer ring and the crankcase, and the split outer ring vibrates with respect to the bearing stand.

  Therefore, the applicant of the present invention is based on the recognition that the gap between the snap ring and the retaining groove is the cause of rattling and play, and causes the displacement of the split surface. As a split outer ring, a split bearing as described in JP-A-6-109025 (Patent Document 1) has already been proposed. In the split bearing described in Patent Document 1, an annular groove straddling both sides with the split face as a boundary is locally formed on the outer peripheral surface of the split outer ring, and an engagement ring is provided in the annular groove. The outer ring divided bodies are connected and held together by fitting. Since the engagement ring that fits locally on each of the two split surfaces is sufficiently smaller than the conventional snap ring, it can be a part with high rigidity and a large spring constant, and exhibits a large holding force. It is advantageous in that it can be done.

JP-A-6-109025

  However, in the conventional split bearing, the following improvements are desired. In other words, the circumferential groove is separately formed on the outer peripheral surface of the split outer ring so as to intersect with the annular groove described above, and two such circumferential grooves are provided in parallel to each other, and the thermal expansion correction band coupled to the engagement ring described above. Each fit. Thus, a band-shaped band member including two thermal expansion correction bands and two engagement rings as a retaining ring has to be fitted to the split outer ring, and the shape of the band member is complicated. For this reason, man-hours are required for processing the split type bearing. Further, in the assembling operation, after confirming the position of the annular groove, it is necessary to fit the band member, which requires man-hours for assembling.

  In view of the above circumstances, an object of the present invention is to provide a split outer ring in which a retaining ring has a simple shape and can be easily fitted to an outer ring split body.

  For this purpose, the divided outer ring of the bearing according to the present invention has an arc shape obtained by dividing the bearing outer ring in the circumferential direction, and has an outer circumferential groove extending in the circumferential direction on the outer circumferential surface, and the outer circumferential groove is directed toward the groove bottom. A plurality of outer ring segments having a cross-sectional shape with a narrower groove width, an arc shape exceeding 180 degrees in the circumferential direction and a circular cross-sectional shape, fitted into the outer peripheral groove, and in contact with both side surfaces of the outer peripheral groove And a ring member that holds the plurality of outer ring divided bodies arranged in the form of a bearing outer ring.

  According to the present invention, since the outer peripheral groove is formed on the outer periphery of the outer ring divided body and extends in the circumferential direction, the ring member can be easily fitted into the outer peripheral groove, and the assembly efficiency is improved.

  According to the present invention, since the ring member has an arc shape exceeding 180 degrees in the circumferential direction and the cross-sectional shape is circular, the ring member has a simple shape and is easily processed.

  According to the present invention, the outer ring divided body has a cross-sectional shape in which the groove width becomes narrower toward the groove bottom, the ring member has a circular cross-sectional shape, and the ring member is fitted into the outer peripheral groove. Therefore, the ring member can be supported by two-point contact since both sides of the outer circumferential groove are in contact with each other, and there is no gap between the ring member and the outer circumferential groove in the axial direction and the direction perpendicular to the axial line. Therefore, it becomes possible to hold | maintain the some outer ring division body arranged in the form of the bearing outer ring | wheel so that relative movement is impossible, and it can prevent that an outer ring division body shift | deviates by a crack surface.

  In the present invention, a circular cross-sectional shape should be understood to include a perfect circle and an ellipse. Further, the cross-sectional shape in which the groove width becomes narrower toward the groove bottom means that if both side surfaces of the outer peripheral groove are flat surfaces, both side surfaces form a V-shaped cross section. Alternatively, one side surface, the other side surface, and the bottom surface of the outer peripheral groove constitute a trapezoidal cross section. That is, both side surfaces may intersect and the groove bottom of the outer peripheral groove may be formed at an acute angle, or an obtuse angle may be formed. Alternatively, both sides may not intersect and the groove bottom may have any shape. For example, the groove bottom may be rounded and recessed, the groove bottom may be a flat surface, or the groove bottom may be uneven. Moreover, although both sides | surfaces are flat, both sides | surfaces may have curvature, for example so that cross-sectional shape may be arch shape.

  The present invention is not limited to one embodiment, and the ring member may be made of metal or the like, but preferably the ring member is formed of a polymer material. According to such an embodiment, the cross-section of the ring member can be suitably deformed along both side surfaces of the outer circumferential groove, and the gap between the ring member and the outer circumferential groove can be reliably eliminated.

  More preferably, the ring member is pushed in the inner diameter direction and is fitted into the outer circumferential groove while being deformed. According to such an embodiment, it is possible to promote the deformation of the ring member so that the ring member can be reliably brought into contact with both side surfaces of the outer circumferential groove, and the gap between the ring member and the outer circumferential groove is more reliably eliminated. be able to.

  Since the ring member of the present invention is fitted into the V-shaped groove, the ring member comes into two-point contact in contact with both side surfaces of the outer circumferential groove in a sectional view. The present invention is not particularly limited as long as it is a ring member and an outer peripheral groove that ensure such two-point contact. Preferably, the ring member is in contact with a bearing base that surrounds the bearing outer ring. According to this embodiment, since the ring member comes into contact with the bearing base that surrounds the bearing outer ring, the ring member can be further supported by three-point contact. Accordingly, the gap between the bearing base and the bearing outer ring can be suitably eliminated, and the occurrence of fretting can be suitably prevented at the fitting surface between the bearing base and the bearing outer ring.

  Moreover, according to the present invention, even when the gap width of the fitting surface changes due to temperature rise, the ring member follows and deforms, so the fitting surface can be used in all temperature states from room temperature to high temperature. The gap can be eliminated.

  The ring member may be pressed by tightening or hitting the outer peripheral surface of the bearing outer ring with any tool before attaching the temporarily held bearing outer ring to the bearing base of the housing. Is pressed in the inner diameter direction by the bearing stand. According to such an embodiment, the ring member can reliably ensure three-point contact with the fitting surface of the housing and both side surfaces of the outer peripheral groove, and not only prevents the split surface from being displaced reliably. The occurrence of fretting can be reliably prevented.

  The outer circumferential groove may be formed at the center in the axial direction, but preferably, the outer circumferential groove is formed at an axial position that is close to one end in the axial direction and far from the other end in the axial direction. According to this embodiment, since the outer peripheral groove is formed at one end in the axial direction, the assembly direction of the outer ring divided body can be easily visually confirmed. Therefore, the work of correctly aligning the split surfaces is facilitated, and the assembly efficiency is significantly improved.

  Preferably, at least one of the two outer ring divided bodies has an oil hole connected to the inner peripheral surface of the outer ring divided body in the central portion in the axial direction. According to this embodiment, it becomes possible to supply lubricating oil to the inner peripheral surface of the outer ring whose rolling element is the raceway surface, and the durable life of the split outer ring can be extended.

  Preferably, at least one of the two outer ring divided bodies has a concave portion for receiving the pin of the bearing base at the central portion in the axial direction or the other end portion in the axial direction. According to such an embodiment, it is possible to prevent the split outer ring from shifting from the bearing base during engine assembly.

  Preferably, the ring member is less than 360 degrees in the circumferential direction. According to this embodiment, both ends in the circumferential direction of the ring member can be temporarily expanded, and the ring member can be easily fitted into the outer ring divided body from the radially outer side of the bearing outer ring.

  The bearing according to the present invention includes a split outer ring, a plurality of rolling elements disposed on the inner peripheral surface of the split outer ring, and a plurality of rolling elements arranged along the inner peripheral surface of the split outer ring. And an arc-shaped split cage separated from each other.

  According to the present invention, since the bearing includes the split outer ring and the split cage, a part of the outer periphery of the crankshaft is covered with one of the split outer ring and one of the split cages, and the other of the outer periphery of the crankshaft. A bearing can be temporarily assembled on the outer peripheral surface of the crankshaft by partially covering the other of the split outer ring and the other of the split cage and engaging a ring member with the outer peripheral surface of the split outer ring.

  A ring member for a split outer ring according to the present invention has a semicircular arc shape formed by dividing a bearing outer ring into two parts, and has an outer peripheral groove extending in the circumferential direction on the outer peripheral surface, and the outer peripheral groove is a groove toward the groove bottom. A ring member for holding the outer ring divided body having a narrow cross-sectional shape in a state of being arranged in the form of a bearing outer ring, having an arc shape exceeding 180 degrees in the circumferential direction and a circular cross-sectional shape. It fits into the outer circumferential groove and contacts both side surfaces of the outer circumferential groove.

  According to the present invention, since the ring member has an arc shape exceeding 180 degrees in the circumferential direction and the cross-sectional shape is circular, the ring member has a simple shape and is easily processed.

  According to the present invention, the outer ring divided body has a cross-sectional shape in which the groove width becomes narrower toward the groove bottom, the ring member has a circular cross-sectional shape, and the ring member is fitted into the outer peripheral groove. Therefore, the gaps in the axial direction and the direction perpendicular to the axial line do not occur between the ring member and the outer peripheral groove because they are fitted into the outer peripheral groove and come into contact with both side surfaces of the outer peripheral groove. Therefore, it becomes possible to hold | maintain the some outer ring division body arranged in the form of the bearing outer ring | wheel so that relative movement is impossible, and it can prevent that an outer ring division body shift | deviates by a crack surface.

  As described above, according to the present invention, the outer circumferential groove extending in the circumferential direction is formed on the outer circumferential surface of the outer ring divided body, and the outer circumferential groove has a cross-sectional shape in which the groove width becomes narrower toward the groove bottom, and the ring having a circular cross-sectional shape. Since the member fits into the outer circumferential groove and contacts both sides of the outer circumferential groove, the ring member can be easily fitted into the outer circumferential groove, and the ring member has a simple shape and is easy to process, Further, the plurality of outer ring divided bodies can be held so as not to be relatively movable. Accordingly, it is possible to reduce the number of processing steps and assembly steps, and to provide a split outer ring that is advantageous in terms of cost.

It is a perspective view which shows the division | segmentation outer ring | wheel of the bearing which becomes one Example of this invention. It is a disassembled perspective view which shows the division | segmentation outer ring | wheel of the Example. It is use condition explanatory drawing which shows the state which the division | segmentation outer ring of the Example supports a crankshaft rotatably. It is a figure which shows the cross-sectional shape of the outer periphery groove | channel of the ring member and division | segmentation outer ring | wheel of the Example. The It is sectional drawing which shows the state in which the ring member fitted to an outer periphery groove | channel is pressed from the radial direction outer side. It is sectional drawing which shows the state before putting a cap side housing on the ring member fitted to an outer periphery groove | channel. It is sectional drawing which shows the state which covered the cap side housing on the ring member fitted to an outer periphery groove | channel. It is a figure which shows the cross-sectional shape of the outer periphery groove | channel of the ring member of another Example, and a division | segmentation outer ring | wheel. Furthermore, it is a figure which shows the cross-sectional shape of the outer periphery groove | channel of the ring member of another Example, and a division | segmentation outer ring | wheel. It is a front view which shows the bearing which becomes one Example of this invention. It is a perspective view which shows the division | segmentation holder | retainer of the Example. It is a perspective view which shows the division | segmentation holder | retainer and rolling element of the Example.

  Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.

  FIG. 1 is a perspective view showing a split outer ring of a bearing according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the split outer ring of the same embodiment. FIG. 3 is an explanatory view showing a state in which the divided outer ring of the embodiment is attached to the crankcase and rotatably supports the crankshaft.

  As shown in FIG. 3, the divided outer ring 11 is a bearing outer ring of a rolling bearing of an inner ring omitted type, and is a wrinkle-free type. The inner peripheral surface 13 of the split outer ring 11 surrounds the outer peripheral surface 103 of the crankshaft 101. A plurality of rollers 105 are arranged on the outer peripheral surface 103 of the crankshaft 101, the inner peripheral surface 13 of the split outer ring 11, and the annular gap. The rollers 105 are made of steel and roll with the outer peripheral surface 103 as an inner raceway surface and the inner peripheral surface 13 as an outer raceway surface. Further, the plurality of rollers 105 are arranged at equal intervals in the circumferential direction by a split cage (not shown). The roller 105 may be a rolling element and is not shown in the drawing, but may be a rolling shape such as a sphere.

  The split outer ring 11 is fixedly attached to a bearing stand 107 attached to the crankcase of the engine. The bearing stand 107 includes a bearing stand main body 107 a in which a semicircular cutout portion 109 having substantially the same diameter as the outer peripheral surface 14 of the split outer ring 11, and a semicircular arc cap-side housing corresponding to the cutout portion 109. 107b. The divided outer ring 11 passed through the crankshaft 101 is first placed on the notch 109, then covered with the cap side housing 107b, and then both ends of the cap side housing 107b are bolted to the bearing base body 107a. . Thereby, the divided outer ring 11 is attached and fixed to the bearing stand 107, and the bearing stand 107 surrounds the entire outer peripheral surface 14 of the divided outer ring 11.

  As shown in FIG. 2, the divided outer ring 11 has two outer ring divided bodies 12, 12 which are manufactured by applying a strong external force to a cylindrical steel bearing outer ring and dividing it into two in the direction perpendicular to the axis. The outer ring divided body 12 obtained by dividing the bearing outer ring into a plurality of parts in the circumferential direction has a half-arc shape, and has split surfaces 18 at both ends in the circumferential direction. Since the split surface 18 is formed by natural splitting, it has minute irregularities, and the split surface 18 of one outer ring divided body 12 and the split surface 18 of the other outer ring split body 12 can be closely aligned. . Thereby, these two outer ring division bodies 12 are arranged in the form of a bearing outer ring.

  An outer peripheral groove 15 is provided on the outer periphery of the outer ring divided body 12. When the two outer ring divided bodies 12, 12 are closely aligned with the split surface 18, the outer circumferential groove 15 of one outer ring divided body 12 and the outer circumferential groove 15 of the other outer ring divided body 12 are connected to each other. An annular outer circumferential groove 15 extending over the entire circumference of the outer circumferential surface 14 is formed. The outer peripheral groove 15 is provided at one end in the axial direction of the outer peripheral divided body 12. As a result, the assembling worker can easily visually recognize the position of the outer peripheral groove 15 in the axial direction, and the inconvenience of aligning the split surface 18 in the reverse direction in the assembling work can be prevented. Although not shown in the drawing, the outer peripheral groove 15 may be provided in the central portion in the axial direction of the outer peripheral divided body 12.

  At least one of the two outer ring divided bodies 12 has an oil hole 22 at the axially central portion. The oil hole 22 penetrates the outer ring divided body 12 from the outer peripheral surface 14 to the inner peripheral surface 13. The bearing stand 107 is provided with an oil passage (not shown) connected to the oil hole 22, and supplies lubricating oil from the oil hole 22 to the inner peripheral surface 13 that becomes the outer raceway surface.

  Further, at least one of the two outer ring divided bodies 12 has a concave portion 24 in the axial center portion on the outer peripheral surface 14. On the other hand, a pin (not shown) protruding in the inner diameter direction is formed in the notch portion 109 of the bearing base body 107a. When the split outer ring 11 is attached to the bearing base 107, the recess 24 receives the pin of the bearing base 107. The engagement between the recess 24 and the pin restricts the movement of the split outer ring 11 and securely fixes the split outer ring 11 to the bearing stand 107. Although not shown, the outer ring divided body 12 may have a recess at the other end in the axial direction instead of the central portion in the axial direction.

  A ring member 17 is fitted in the outer circumferential groove 15. The ring member 17 has an arc shape with a length exceeding 180 degrees, and is C-shaped when viewed in the axial direction. The ring member 17 is grasped so as not to be relatively movable across the two outer ring divided bodies 12, and temporarily holds the two outer ring divided bodies 12 in the form of a bearing outer ring.

  The ring member 17 has an arc shape of less than 360 degrees, specifically, an arc of any value included in the circumferential direction of 240 degrees, 330 degrees, or 240 degrees to 330 degrees. The ring member 17 can be elastically deformed so that the circumferential ends 17t and 17t are temporarily separated to the same distance as the outer diameter of the split outer ring 11, and can be fitted into the outer circumferential groove 15 from the outer diameter direction.

  In the assembly of the split outer ring 11, a plurality of rollers 105 and a retainer (not shown) are arranged on the outer periphery of the crankshaft 101, and the two outer ring split bodies 12 are originally arranged so as to surround the outer periphery of the crankshaft 101 and the plurality of rollers 105. The ring member 17 is fitted into the outer peripheral groove 15 in a state where the ring member 17 is closely aligned with the split surface 18. The division outer ring 11 is completed by such assembling work. Next, the crankshaft 101 is rotatably supported by the bearing base 107 of the crankcase by the work of attaching and fixing the divided outer ring 11 to the bearing base 107.

  FIG. 4 is a diagram showing a cross-sectional shape of the outer peripheral groove of the ring member and the split outer ring of the same embodiment. The cross section of the outer peripheral groove 15 has a V shape in which the groove width becomes narrower toward the groove bottom. Both side surfaces 19 of the outer circumferential groove 15 are flat surfaces. The angle at which the side surfaces 19, 19 intersect is not particularly limited.

  The ring member 17 is made of a polymer material and has a circular cross-sectional shape. The diameter of the circular cross section is defined such that a part of the circular cross section protrudes from the outer peripheral groove 15 when both side surfaces 19, 19 of the outer peripheral groove 15 are tangent. For this reason, before the split outer ring 11 is attached and fixed to the bearing stand 107, the ring member 17 fitted in the outer circumferential groove 15 is formed on both side surfaces 19, 19 in a sectional view as shown in FIG. It is in point contact and protrudes in the outer diameter direction from the outer peripheral surface 14. Then, the ring member 17 is pressed radially inward as indicated by an arrow α in FIG. 5 and is pushed toward the groove bottom 15b of the outer peripheral groove. As a result, the ring member 17 is elastically deformed following the cross-sectional shape of the outer circumferential groove 15 and comes into surface contact with both side surfaces 19 and 19.

  According to the present embodiment, since the ring member 17 is pushed toward the groove bottom 15b of the outer peripheral groove, a gap opened in the axial direction between the outer ring divided body 12 and the ring member 17 does not occur. Accordingly, it is possible to prevent one outer ring divided body 12 from shifting with respect to the other outer ring divided body 12. As a result, it is possible to avoid the inconvenience that the split surface 18 is displaced when it is attached to the bearing stand 107.

  Since the ring member 17 is made of a polymer material, it can be fitted to the outer ring divided body 12 with appropriate elasticity and hardness. In addition, since the cross-sectional shape is elastically deformed and enters the outer circumferential groove 15, it contacts the both side surfaces 19, 19 and presses the side surface 19, so that the two outer ring divided bodies 12 are securely held in the shape of the divided outer ring 11. be able to.

  According to this embodiment, when the cap-side housing 107b is put on the divided outer ring 11 placed on the bearing base body 107a, one outer ring divided body 12 is made to the other outer ring divided body 12 by an impact during assembly. Can be prevented.

  FIG. 6 is a cross-sectional view showing a state before the cap-side housing 107 b is put on the ring member 17 fitted in the outer peripheral groove 15. Immediately after fitting the ring member 17 into the outer circumferential groove 15, the ring member 17 is in contact with both side surfaces 19, 19 but is not completely accommodated in the outer circumferential groove 15, and a part of the ring member 17 is divided into outer rings. The outer peripheral surface 14 of the body 12 protrudes in the outer diameter direction.

  FIG. 7 is a cross-sectional view showing a state in which the cap-side housing is put on the ring member 17 fitted in the outer peripheral groove 15. The ring member 17 is in contact with a bearing stand 107 that surrounds the divided outer ring 11. The bearing base body 107 a and the cap side housing 107 b press the ring member 17 from the radially outer side in the inner diameter direction indicated by the arrow α, and the ring member 17 is pushed into the outer circumferential groove 15. Thereby, the cross-sectional shape of the ring member 17 is elastically deformed and comes into surface contact with both side surfaces 19 and 19.

  Next, another embodiment of the present invention will be described. FIG. 8 is a view showing the cross-sectional shape of the outer peripheral groove of the ring member and the split outer ring of another embodiment. Regarding the other embodiments, the same components as those in the above-described embodiments will be denoted by the same reference numerals, the description thereof will be omitted, and different configurations will be described below. In another embodiment, the ring member 17 is formed of a metal material. The ring member 17 according to another embodiment can also be elastically deformed, and is fitted into the outer circumferential groove 17t from the radially outer side of the divided outer ring 11 with the circumferential ends 17t and 17t spaced apart so as to temporarily spread.

  The ring member 17 made of a metal material is completely accommodated in the outer circumferential groove 15 and does not protrude from the outer circumferential surface 14 of the outer ring divided body 12 as shown in FIG. Even in this other embodiment, it is fitted to the outer peripheral groove 15, is in contact with both side surfaces 19, 19 of the outer peripheral groove, and holds the two outer ring divided bodies 12 arranged in the form of a bearing outer ring. Can do.

  Next, still another embodiment of the present invention will be described. FIG. 9 is a view showing the cross-sectional shape of the outer peripheral groove of the ring member and the split outer ring of still another embodiment. A flat bottom surface 21 is formed between the one side surface 19 and the other side surface 19 of the outer circumferential groove 15. That is, in still another embodiment, the outer peripheral groove 15 has a cross-sectional shape such as an isosceles trapezoid. The cross-sectional shape of the outer peripheral groove 15 may be any shape as long as the groove width becomes narrower toward the groove bottom, and both side surfaces 19 and 19 need not intersect at the groove bottom. Although not shown in the drawing, the bottom surface 21 may have a cross-sectional shape such as a semicircle recessed toward the inner diameter side, or may have an uneven shape.

  Further, the ring member 17 of another embodiment has an elliptical cross-sectional shape. Thus, the cross-sectional shape of the ring member 17 may be a perfect circle or an ellipse. This is because even if it is elliptical, it can contact both side surfaces 19, 19 of the outer circumferential groove 15.

  A rolling bearing using the above-described split outer ring 11 is shown in FIGS.

  FIG. 10 is a front view showing a bearing according to one embodiment of the present invention. FIG. 11 is a perspective view showing the split cage of the same embodiment. FIG. 12 is a perspective view showing the split cage and rolling elements of the same embodiment.

  The rolling bearing 71 includes a split outer ring 11 including a ring member 17 (not shown) fitted in the outer ring divided body 12 and the outer peripheral groove 15, and a plurality of rolling elements that are arranged on the inner peripheral surface of the divided outer ring 11. A roller 105 and an arc-shaped split cage 51 that is disposed along the inner peripheral surface of the split outer ring 11 and separates the plurality of rollers 105 at a predetermined interval in the circumferential direction.

  The split cage 51 has a semicircular arc shape of approximately 180 degrees, and includes a pair of half ring portions 52 and 52 and a plurality of column portions 54 that connect the pair of half ring portions 52 and 52 to each other. A pocket 56 for accommodating the roller 105 is formed between the column portions 54, 54.

  The half ring portion 52 has a bowl shape having a width in the radial direction of the split cage 51 and a thickness in the axial direction.

  The column portion 54 includes a column central portion 58 positioned relatively radially inward in the axial central region of the split cage 51 and a pair of column ends positioned relatively radially outward in the axial end region. Parts 59, 59, and a pair of column inclined portions 61, 61 for connecting the column central portion 58 and the pair of column end portions 59, respectively. Projections (not shown) for locking the rollers 105 are formed on the column central portion 58 on the radially inner side and the column end portion 59 on the radially outer side, and the rollers 105 are held between adjacent column portions. be able to. Accordingly, it is possible to prevent the rollers 105 from dropping from the pocket 56 as shown in FIG.

  Two split cages 51 for holding the rollers 105 in the pocket 56 are prepared and arranged in one semicircular arc region and the other semicircular arc region in the entire inner peripheral surface of the split outer ring 11. Thus, the two split cages 51 are arranged over the entire circumference of the inner peripheral surface of the split outer ring 11.

  Since the rolling bearing 71 of this embodiment includes the split outer ring 11 and the split cage 51, a part of the outer periphery of the crankshaft 101 is covered with one outer ring split body 12 and the split cage 51, The other part of the outer periphery of the crankshaft 101 is covered with the other outer ring divided body 12 and the divided cage 51, and the ring member 17 is engaged with the outer peripheral surface of the divided outer ring 11, thereby the crankshaft. A bearing can be temporarily assembled on the outer peripheral surface 103 of 101.

  In the present embodiment, an example is shown in which two semi-arc-shaped split cages of approximately 180 degrees are used. However, the cage is not limited to this form, and is made of an elastic member such as resin, It may be a cage having a crack only at one position in the direction. In this case, the cage is mounted by elastically deforming the cage. As a modification, although not shown, a plurality of arc-shaped divided cages having a circumferential angle of less than 180 degrees are prepared, and the plurality of divided cages are set to 360 degrees as a whole. You may arrange.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The split outer ring and the ring member for split outer ring according to the present invention are advantageously used in engines such as automobiles.

  DESCRIPTION OF SYMBOLS 11 Divided outer ring, 12 Outer ring divided body, 13 Inner peripheral surface, 14 Outer peripheral surface, 15 Outer peripheral groove, 17 Ring member, 18 Split surface of outer ring divided body, 19 Side surface of outer peripheral groove, 21 Bottom surface of outer peripheral groove, 22 Oil hole, 24 recesses, 51 split cage, 71 rolling bearing, 101 crankshaft, 103 outer peripheral surface, 105 rollers, 107 bearing base, 107a bearing base body, 107b cap side housing, 109 notch.

Claims (11)

A plurality of outer rings having a circular arc shape obtained by dividing a bearing outer ring in the circumferential direction and having an outer circumferential groove extending in the circumferential direction on the outer circumferential surface, and the outer circumferential groove having a cross-sectional shape with a groove width becoming narrower toward the groove bottom. A split body,
The circular outer shape is more than 180 degrees in the circumferential direction and the cross-sectional shape is circular. The outer ring divided bodies are arranged in the form of a bearing outer ring by fitting into the outer circumferential groove and contacting both side surfaces of the outer circumferential groove. A split outer ring of a bearing, comprising: a ring member that maintains the state.   The split outer ring of the bearing according to claim 1, wherein the ring member is formed of a polymer material.   The split outer ring of the bearing according to claim 1, wherein the ring member is pushed in an inner diameter direction and is fitted into the outer circumferential groove while being deformed.   The split outer ring of the bearing according to claim 1, wherein the ring member is in contact with a bearing base that surrounds the bearing outer ring.   The split outer ring of the bearing according to claim 4, wherein the ring member is pressed in an inner diameter direction by the bearing base.   6. The split outer ring of a bearing according to claim 1, wherein the outer circumferential groove is formed at an axial position that is close to one end in the axial direction and far from the other end in the axial direction.   The split outer ring of the bearing according to claim 6, wherein at least one of the two outer ring divided bodies has an oil hole connected to an inner peripheral surface of the outer ring divided body at an axially central portion.   8. The split outer ring for a bearing according to claim 6, wherein at least one of the two outer ring divided bodies has a concave portion for receiving a pin of the bearing stand at a central portion in the axial direction or the other end portion in the axial direction.   The split outer ring of the bearing according to claim 1, wherein the ring member is less than 360 degrees in the circumferential direction.   The split outer ring of the bearing according to any one of claims 1 to 9, a plurality of rolling elements disposed on an inner peripheral surface of the split outer ring, and the plurality of rolling elements disposed along an inner peripheral surface of the split outer ring, And a circular arc-shaped split cage that separates the rolling elements at predetermined intervals in the circumferential direction. The outer ring is a semicircular arc shape formed by dividing the bearing outer ring into two parts, the outer peripheral surface has an outer peripheral groove extending in the circumferential direction, and the outer peripheral groove has a cross-sectional shape in which the groove width becomes narrower toward the groove bottom. A ring member for holding the body in a state arranged in the form of a bearing outer ring,
A ring member for a split outer ring which has an arc shape exceeding 180 degrees in the circumferential direction and a circular cross-sectional shape, and is fitted into the outer circumferential groove and contacts both side surfaces of the outer circumferential groove.

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