JP2011075091A - Dividable outer ring of bearing and bearing provided with 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 and surely fit onto outer ring segments. <P>SOLUTION: The dividable outer ring 11 of a bearing includes: a plurality of the outer ring segments 12, each with an arcuate shape into which the outer ring of the bearing is divided in the circumferential direction, formed with division surfaces 18 on both ends in the circumferential direction, having an outer circumferential groove 15 extending in the circumferential direction on an outer circumferential surface 14; and a ring member 17 with the arcuate shape more than 360° in the circumferential direction, fitting into the outer circumferential groove 15 in a manner to straddle the division surface 18, 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 snap ring has been used as the retaining ring. However, since the sectional shape of the retaining groove is sufficiently larger than the sectional shape of the snap ring, a gap is generated between the snap ring and the retaining groove. 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.

  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, the split outer ring must be fitted with two thermal expansion correction bands and two engagement rings as a retaining ring, and the shape of the retaining ring is complicated. For this reason, man-hours were required for processing. Further, in the assembling work, after confirming the position of the annular groove, it has to be fitted with a retaining ring, 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 and reliably fitted to an outer ring divided body.

  For this purpose, the split outer ring of the bearing according to the present invention has an arc shape obtained by dividing the outer ring of the bearing in the circumferential direction, split surfaces are formed at both ends in the circumferential direction, and an outer peripheral groove extending in the circumferential direction is formed on the outer peripheral surface. A plurality of outer ring divided bodies and a circular arc shape exceeding 360 degrees in the circumferential direction, fitted into the outer peripheral groove so as to straddle the split surface, and held in a state where the plurality of outer ring divided bodies are arranged in the form of a bearing outer ring A ring member.

  According to the present invention, it has an arc shape exceeding 360 degrees in the circumferential direction, is fitted into the outer circumferential groove so as to straddle the split surface, and is held in a state where a plurality of outer ring divided bodies are arranged in the form of a bearing outer ring. Since the ring member is provided, the shape of the ring member can be made one curved member, and the ring member can be made a simple shape.

  According to the present invention, since the ring member has an arc shape exceeding 360 degrees, the ring member can hold the outer periphery of the split outer ring so as to hold the entire circumference of 360 degrees. Therefore, it is not necessary to check the circumferential position in the assembly work, and the ring member can be surely straddled across the split surface, and the number of assembly steps can be reduced. And the ring member can be surely straddled between the outer ring divided bodies connected by the split surface, and the split of the split surface can be prevented.

  The ring member having an arc shape exceeding 360 degrees may be wound in a spiral shape and both end portions in the circumferential direction may be adjacent to each other in the axial direction. Preferably, both circumferential ends of the ring member are formed in a tapered shape and overlap each other in the circumferential direction, and the axial dimension and the radial dimension of the overlapping part including these both ends are equal to each other in the circumferential direction of the ring member. It is equal to or smaller than the axial dimension and radial dimension of the intermediate part. According to this embodiment, since the circumferential direction both ends of the ring member are formed in a tapered shape, the shape of the ring member can be a ring instead of a spiral.

  Moreover, since the axial dimension and the radial dimension of the overlapping portion including both circumferential ends of the ring member are equal to or smaller than the axial dimension and the radial dimension of the circumferential intermediate portion of the ring member, the cross-sectional shape of the ring member Can be made constant at all circumferential positions, and the groove width of the outer circumferential groove can be adapted to the ring member. Therefore, the ring member can be fitted along the groove side surfaces on both sides in the width direction of the outer circumferential groove.

  In the overlapping portion, there may be a gap between the circumferential end of the ring member and the other circumferential end, or the circumferential end of the ring member and the circumferential other end are in contact with each other without a gap. May be. Moreover, the circumferential direction one end part and circumferential direction other end part in the overlapping part may be arrange | positioned at the axial direction one side and the other side, or may be arrange | positioned at radial direction one side and the other side.

  Further, the split outer ring of the bearing according to the present invention has a circular arc shape obtained by dividing the bearing outer ring in the circumferential direction, split surfaces are formed at both ends in the circumferential direction, and a plurality of outer rings having outer circumferential grooves extending in the circumferential direction on the outer circumferential surface. The segment and the arc shape of less than 360 degrees in the circumferential direction, and at least one of the one end and the other end in the circumferential direction abuts the terminal end of the outer circumferential groove and fits into the outer circumferential groove so as not to rotate relative to each other. A ring member may be provided that extends over all surfaces and holds the plurality of outer ring divided bodies arranged in the form of a bearing outer ring.

  According to this invention, since a ring member is circular arc shape of less than 360 degree | times in the circumferential direction, a ring member can be made into a simple shape. In addition, since the ring member extends within a range of less than 360 degrees, it is easy to elastically deform the ring member and widen both ends in the circumferential direction, and it can be easily fitted into the outer ring during assembly work.

  According to the present invention, since the ring member is fitted in the outer circumferential groove so as not to be relatively rotatable so that the ring member straddles the split surface, the ring member straddles the split surface even though the total length of the ring member is less than 360 degrees. As a result, the outer ring divided body can be stably held. Therefore, it is possible to prevent the split surface from shifting.

  Preferably, the ring member is C-shaped, and the circumferential length of the outer circumferential groove in the plurality of outer ring divided bodies arranged in the form of a bearing outer ring is substantially equal to the circumferential length of the ring member, and the circumferential direction of the ring member One end and the other end are in contact with the end of the outer circumferential groove. According to this embodiment, since the circumferential length of the outer circumferential groove is substantially equal to the circumferential length of the ring member, both ends of the ring member abut against the end of the outer circumferential groove. Therefore, the ring member does not rotate relative to the outer circumferential surface in the circumferential direction, and the outer ring divided body can be stably held while straddling the split surface.

  Alternatively, the ring member may have a bent portion that is bent at least one of both ends in the circumferential direction and further extends in a direction intersecting the circumferential direction, and engages with the outer ring divided body. According to this embodiment, the ring member does not rotate relative to the outer circumferential surface in the circumferential direction, and the outer ring divided body can be stably held while straddling the split surface.

  As one embodiment, the bent portion extends in the axial direction, and the outer ring divided body has an axial groove on the outer peripheral surface that extends in the axial direction and receives the bent portion. According to this embodiment, it becomes possible to easily engage the bent portion of the ring member with the axial groove, and in the assembling work, the outer portion of the ring member is expanded by applying a circumferential external force to the bent portion. It can be easily fitted into the outer ring.

  The bent portion may extend in the radial direction, and the outer ring divided body may have a radial groove on the outer peripheral surface that extends in the radial direction and engages with the bent portion. According to this embodiment, it is only necessary to drill holes in the outer ring divided body, and the hole machining is easier than the groove machining, so that the manufacturing efficiency is improved.

  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.

  Thus, in the present invention, the ring member has an arc shape exceeding 360 degrees, or the ring member is fitted to the outer circumferential groove so as not to be relatively rotatable, so that the ring member can be made into a simple shape and manufactured. Efficiency and assembly efficiency are improved and cost is advantageous. In addition, since the ring member is fitted into the outer circumferential groove so as to surely straddle the split surface, it is possible to stably hold the outer ring divided body and prevent the split surface from being displaced.

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 disassembled perspective view which shows the division | segmentation outer ring | wheel of the bearing which becomes a modification of this invention. It is a perspective view which shows the division | segmentation outer ring | wheel of the bearing which becomes another Example of this invention. It is a disassembled perspective view which shows the division | segmentation outer ring | wheel of the Example. It is a perspective view which shows the division | segmentation outer ring | wheel of the bearing which becomes further another Example of this invention. It is a disassembled perspective view which shows the division | segmentation outer ring | wheel of the Example. 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 shape of the original outer ring (form of the bearing outer ring).

  An outer peripheral groove 15 is formed 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 360 degrees. For this reason, one end in the circumferential direction extending beyond 360 degrees overlaps with the other end in the circumferential direction when viewed in the axial direction, and the ring member 17 circulates in a spiral shape. 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 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 split cage (not shown) are arranged on the outer periphery of the crankshaft 101, and the two outer ring split bodies 12 are further enclosed 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 circumferential groove 15 in a state where the bearing outer rings are arranged and the split surfaces 18 are closely aligned with each other. 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.

  Thus, the circumferential direction both ends of the ring member 17 overlap each other over the circumferential direction as described above with reference to FIGS. 1 and 2 and are adjacent to each other in the axial direction. In the embodiment shown in FIGS. 1 and 2, all the ring members 17 have the same cross-sectional shape and circulate in a spiral shape. However, other than the embodiments described above, both ends in the circumferential direction of the ring member are circumferential as described below. Shapes that overlap each other in the direction are possible.

  According to the embodiment shown in FIG. 1 and FIG. 2, the divided outer ring 11 has an arc shape exceeding 360 degrees in the circumferential direction, and is fitted into the outer circumferential groove 15 so as to straddle the split surface 18, and a plurality of outer rings A ring member 17 that holds the divided bodies 12 in a state of being arranged in the form of a bearing outer ring is provided. Thereby, it becomes possible to make the shape of the ring member 17 into one curve member, and to make a ring member into a simple shape.

  Further, since the ring member has an arc shape exceeding 360 degrees, it is not necessary to check the circumferential position in the assembly work, and the ring member can be surely straddled on the split surface 18, and the position in the circumferential direction. The need for alignment is eliminated, and the number of assembly steps can be reduced.

  Further, according to the present invention, since the ring member 17 has an arc shape exceeding 360 degrees, the ring member 17 can hold the outer periphery of the divided outer ring 11 so as to hold the entire circumference of 360 degrees. Therefore, it is not necessary to confirm the circumferential position in the assembly work, and the ring member 17 can be surely straddled over the two split surfaces 18 that are different in phase by 180 degrees, thereby reducing the number of assembly steps. And it is possible to prevent the split surface 18 from being displaced by always straddling the outer ring divided bodies 12, 12 to which the ring member 17 is connected by the split surface 18.

  FIG. 4 is an exploded perspective view showing a split outer ring of a bearing according to a modification of the present invention. With respect to this modification, the same reference numerals are given to the configurations common to the above-described embodiments, and the description thereof will be omitted, and different configurations will be described below. In this modification, both circumferential ends 17s and 17s of the ring member 17 are formed in a tapered shape and overlap each other in the circumferential direction. In the overlapping portion L, the one circumferential end 17s faces the other circumferential end 17s through the gap 26.

  The gap 26 is a space between a flat surface formed at the circumferential end 17s and a flat surface formed at the other circumferential end 17s. These flat surfaces are parallel to each other and inclined with respect to the axis. The gap 26 is formed by preparing an endless ring-shaped member (not shown) and cutting it at one place in the circumferential direction of the ring-shaped member. The ring-shaped member before the cutting process has a circular cross-sectional shape of the same size at any circumferential position. The flat surface of the circumferential one end 17s and the flat surface of the circumferential other end 17s are elliptical in shape.

  Accordingly, the axial dimension and the radial dimension of the overlapping portion L including both end portions 17 s are equal to the axial dimension and the radial dimension of the circumferential intermediate portion of the ring member 17.

  According to the modification shown in FIG. 4, since both circumferential ends 17 s of the ring member 17 are formed in a tapered shape, the shape of the ring member 17 can be a ring instead of a spiral. Therefore, the groove width of the outer peripheral groove 15 can be adapted to the ring member 17.

  Moreover, since the axial direction dimension and radial direction dimension of the overlapping part L including the circumferential direction both ends 17s of the ring member 17 are equal to the axial direction dimension and radial direction dimension of the circumferential intermediate part 17c of the ring member 17, the ring member The outer edges of the 17 cross-sectional shapes can all be made equal in both the circumferential end portions and the circumferential intermediate portion. Therefore, the ring member 17 can be fitted along the outer peripheral groove 15.

  Although not shown in the drawing, the axial dimension and the radial dimension of the overlapping portion L including both end portions 17s are smaller than the axial dimension and the radial dimension of the circumferential intermediate portion 17c of the ring member 17. May be. Further, the gap 26 may not exist, and both end portions 17s may be in contact with each other.

  Next, another embodiment of the present invention will be described. FIG. 5 is an exploded perspective view showing a split outer ring of a bearing according to another embodiment. FIG. 6 is an exploded perspective view showing the split outer ring of the embodiment shown in FIG. Regarding the other embodiments, the same reference numerals are given to the components common to the embodiments shown in FIGS. 1 and 2 described above, and the description thereof will be omitted, and different configurations will be described below.

  The split outer ring 31 according to another embodiment includes a C-shaped ring member 17. The ring member 17 has an arc shape of less than 360 degrees in the circumferential direction, and is not a closed ring shape. Accordingly, the ring member 17 has one circumferential end and the other circumferential end.

  The outer peripheral groove 15 also has a circumferential end 15t on the outer peripheral surface 14 instead of a closed ring in a state where the outer ring divided bodies 12 and 12 are arranged in the form of a bearing outer ring. The circumferential length of the outer circumferential groove 15 is substantially equal to the circumferential length of the ring member 17. As a result, both circumferential ends 17 t of the ring member abut against the circumferential end 15 t of the outer circumferential groove 15, and the ring member 17 is fitted into the outer circumferential groove 15 so as not to be relatively rotatable.

  And the split surface 18 is arrange | positioned in the circumferential direction position which cross | intersects the outer periphery groove | channel 15, and it is not arrange | positioned in the circumferential direction area | region 14m of the outer peripheral surface 14 between the termination | terminus 15t and the outer periphery groove | channel 15 not being formed. For this reason, the ring member 17 always straddles the split surface 18. Thus, the ring member 17 holds the plurality of outer ring divided bodies 12 and 12 in a state of being arranged in the form of a bearing outer ring.

  According to the embodiment shown in FIGS. 5 and 6, the split outer ring 31 includes the ring member 17, the ring member 17 has an arc shape of less than 360 degrees in the circumferential direction, and one end and the other end in the circumferential direction are the outer circumferential grooves 15. The outer ring segment 12 is arranged in the form of a bearing outer ring. Keep in state. Thereby, the ring member 17 can be made into a simple shape.

  Further, since the ring member 17 has an arc shape of less than 360 degrees in the circumferential direction, it is easy to elastically deform the ring member 17 to widen the circumferential ends 17t and 17t, and it is easy for the split outer ring 11 to be easily assembled. Can be fitted. Since the ring member 17 is fitted to the outer peripheral groove 15 so as not to be relatively rotatable so as to straddle the split surface 18, the ring member 17 straddles the split surface 18 even though the total length of the ring member 17 is less than 360 degrees. As a result, the outer ring divided body 12 can be stably held. Therefore, the shift of the split surface 18 can be prevented.

  Next, still another embodiment of the present invention will be described. FIG. 7 is an exploded perspective view showing a split outer ring of a bearing according to still another embodiment. FIG. 8 is an exploded perspective view showing the split outer ring of the embodiment shown in FIG. Further, in the other embodiments, the same reference numerals are given to the same configurations as those in the embodiments shown in FIGS. 1, 2, 5, and 6 described above.

  The split outer ring 51 according to another embodiment includes a ring member 17 having a substantially C-shape. The ring member 17 is a single curved member that forms an arc, and is the same as the embodiment shown in FIGS. 5 and 6 in that it has an arc shape of less than 360 degrees in the circumferential direction.

  However, the ring member 17 shown in FIGS. 7 and 8 is shown in FIGS. 5 and 6 in that the ring member 17 further includes a bent portion 53 that is bent at both ends in the circumferential direction and further extends in a direction intersecting the circumferential direction. Different from the example. The bent portion 53 of the ring member 17 is engaged with the outer peripheral surface of the outer ring divided body 12, whereby the ring member 17 is fitted into the outer peripheral groove 15 so as not to be relatively rotatable.

  7 and 8, the bent portion 53 extends in the axial direction. Further, the outer ring divided body 12 has an axial groove 55 on the outer circumferential surface 14 that further extends in the axial direction from the outer circumferential groove 15. The axial grooves 55 at both ends receive the bent portions 53 at both ends, whereby the ring member 17 is fitted to the outer peripheral surface 14 of the outer ring divided body 12 in a relatively non-rotatable manner. Thereby, the ring member 17 surely straddles the two split surfaces 18 arranged apart in the circumferential direction 180 degrees.

  According to the embodiment shown in FIGS. 7 and 8, the ring member 17 is bent at a circumferential end 17 t so as to further extend in a direction intersecting the circumferential direction and engage with the outer ring divided body 12. Therefore, the ring member 17 does not rotate relative to the outer circumferential surface 14 in the circumferential direction, and the outer ring divided body can be stably held while straddling the split surface 18.

  Although not shown in the drawing, the bent portion 53 may be provided only on one of the circumferential ends 17t of the ring member 17. Moreover, the bending part 53 should just be a direction which cross | intersects the circumferential direction, and may extend toward an internal diameter direction other than an axial direction, or the direction which cross | intersects on the outer peripheral surface 14 diagonally with respect to the circumferential direction. May extend. Further, the outer peripheral groove 15 may not be formed in the region 15n of the outer peripheral groove 15 where the ring member 17 is not fitted.

  7 and 8, the bent portion 53 extends in the axial direction, and the outer ring divided body 12 has an axial groove 55 in the outer peripheral surface 14 that extends in the axial direction and receives the bent portion 53. Have. As a result, the bent portion 53 of the ring member 17 can be easily engaged with the axial groove 55, and both ends 17t of the ring member 17 can be spread and easily fitted into the split outer ring 51 during assembly work. it can.

  A rolling bearing using the above-described split outer ring 11, split outer ring 31, or split outer ring 51 is shown in FIGS.

  FIG. 9 is a front view showing a bearing according to an embodiment of the present invention. FIG. 10 is a perspective view showing the split cage of the same embodiment. FIG. 11 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 of the bearing according to the present invention is advantageously used in an engine such as an automobile.

  11 Split outer ring, 12 Outer ring split body, 13 Inner peripheral surface, 14, outer peripheral surface, 15 outer peripheral groove, 17 ring member, 18 split surface, 22 oil hole, 24 recess, 26 gap, 31, 51 split outer ring, 53 bent Part, 55 axial groove, 101 crankshaft, 103 outer peripheral surface, 105 rollers, 107 bearing base, 107a bearing base body, 107b cap side housing, 109 notch.

Claims (8)

A circular arc shape obtained by dividing the bearing outer ring in the circumferential direction, a plurality of outer ring divided bodies having outer circumferential grooves extending in the circumferential direction on the outer circumferential surface, with split surfaces formed at both ends in the circumferential direction;
A ring member having an arc shape exceeding 360 degrees in the circumferential direction, fitted into the outer circumferential groove so as to straddle the split surface, and holding the plurality of outer ring divided bodies arranged in the form of a bearing outer ring; A split outer ring of a bearing comprising:   Both end portions in the circumferential direction of the ring member are formed in a tapered shape and overlap each other in the circumferential direction, and the axial dimension and the radial dimension of the overlapping portion including these both end parts are equal to those of the intermediate portion in the circumferential direction of the ring member. The split outer ring of the bearing according to claim 1, which is equal to or smaller than an axial dimension and a radial dimension. A circular arc shape obtained by dividing the bearing outer ring in the circumferential direction, a plurality of outer ring divided bodies having outer circumferential grooves extending in the circumferential direction on the outer circumferential surface, with split surfaces formed at both ends in the circumferential direction;
The arcuate shape is less than 360 degrees in the circumferential direction, and at least one of the one end and the other end in the circumferential direction is in contact with the terminal end of the outer circumferential groove and is fitted to the outer circumferential groove so as not to be relatively rotatable. A split outer ring for a bearing comprising: a ring member that extends over all and holds the plurality of outer ring divided bodies arranged in a form of a bearing outer ring. The ring member is C-shaped,
The circumferential length of the outer circumferential groove in the plurality of outer ring divided bodies arranged in the form of a bearing outer ring is substantially equal to the circumferential length of the ring member,
The split outer ring of the bearing according to claim 3, wherein one end and the other end of the ring member in the circumferential direction are in contact with a terminal end of the outer peripheral groove.   4. The bearing according to claim 3, wherein the ring member has a bent portion that is bent at least one of both ends in the circumferential direction and further extends in a direction crossing the circumferential direction, and engages with the outer ring divided body. Split outer ring. The bent portion extends in the axial direction,
The said outer ring | wheel division body is a division | segmentation outer ring | wheel of a bearing of Claim 5 which has an axial direction groove | channel extended in an axial direction and engaging with the said bending part in an outer peripheral surface. The bent portion extends in a radial direction,
The said outer ring | wheel division body is a division | segmentation outer ring | wheel of a bearing of Claim 5 which has a radial direction groove | channel extended in radial direction and engaging with the said bending part in an outer peripheral surface.   The split outer ring of the bearing according to any one of claims 1 to 7, 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.

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