JP2009052579A - Conical roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conical roller bearing capable of securely molding a part functioning as a hooking part, improving assembly workability of the conical roller bearing, extending the length in a roller axial direction, and improving load rating. <P>SOLUTION: The conical roller bearing comprises an inner ring 51, an outer ring 52, the conical roller 53, and a retainer 54. A flange 56 is provided only on a large-diameter side of an outside-diameter surface of the inner ring 51. The retainer 54 comprises a resin retainer main body 61, and a hooking member 62. The retainer main body 61 and the hooking member 62 are connected via an engagement structure 75. The engagement structure 75 comprises a notch 73 formed in an outer peripheral edge of the hooking member 62, a fitting piece 72 which extends from a large-diameter side annular part 54a of the retainer 54 axially outward, and is fitted into the notch 73 from the outside diameter, and an engagement piece 71 which extends from the outer end edge part of the fitting piece 72, and is engaged with an outer end surface of the outer peripheral side of the hooking member 62. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tapered roller bearing.

  The driving force of the engine in the automobile is transmitted to the wheels via a power transmission system including any or all of a transmission, a propeller shaft, a differential, and a drive shaft.

  In this power transmission system, a tapered roller bearing having a high load capacity against a radial load and excellent in impact resistance is often used as a bearing for supporting the shaft. As shown in FIG. 8, the tapered roller bearing generally includes an inner ring 2 having a conical raceway surface 1 on the outer peripheral side, an outer ring 4 having a conical raceway surface 3 on the inner peripheral side, and an inner ring 2. And a plurality of tapered rollers 5 disposed between the outer ring 4 and the outer ring 4, and a retainer 6 that holds the tapered rollers 5 at a predetermined circumferential interval.

  As shown in FIG. 9, the cage 6 includes a pair of annular portions 6 a and 6 b and a column portion 6 c that connects the annular portions 6 a and 6 b to each other, and between adjacent column portions 6 c along the circumferential direction. The tapered roller 5 is accommodated in the formed pocket 6d.

  In this tapered roller bearing, the tapered roller 5 and the raceway surfaces 1 and 3 of the inner and outer rings 2 and 4 are in line contact, and the extension lines of the inner and outer ring raceway surfaces 1 and 3 and the roller center line O are the axis P ( Designed to coincide with one point (not shown) on (see FIG. 8).

  For this reason, when a load acts, the tapered roller 5 is pressed to the large end side. In order to receive this load, a flange portion 7 that protrudes toward the outer diameter side is provided on the larger diameter side of the inner ring 2. In addition, a flange 8 that protrudes also to the small end side of the inner ring 2 is provided so that the tapered roller 5 does not fall off to the small end side before the bearing is assembled in a machine or the like.

  In recent years, with the expansion of the interior space of vehicles, the engine room has been reduced, the engine output has been increased, and the transmission has been increased in stages to improve fuel efficiency. It is coming. In such a severe use environment, it is required to further extend the life of the bearing.

  As a measure for extending the service life of the bearing, it is conceivable to increase the load capacity with the same dimensions from the current state by increasing the number of rollers or increasing the roller length. However, in the current bearing structure, as described above, since the flange portion (small rod) 8 is provided on the small diameter side of the inner ring 2, there is a limit in increasing the length of the tapered roller 5. Moreover, there is a restriction on the number and width of the pillar portions 6c for increasing the number of rollers for reasons of strength. For this reason, the conventional bearing structure has a limit in increasing the load capacity.

  On the other hand, in some conventional tapered roller bearings, a small diameter side flange (small flange) is omitted from the inner ring (Patent Document 1). If the collar portion on the small diameter side in the inner ring is omitted, the length of the tapered roller in the axial direction can be increased by that amount, and the load capacity can be increased. In this type of bearing, as shown in FIGS. 10 and 11, the hook portion 30 that engages with the flange portion 31 on the large diameter side is attached to the cage 24 so that the tapered roller does not fall off during the assembly of the tapered roller. Provided. This hook part 30 consists of a flat rectangular piece, and is provided with two or more by the circumferential direction equal intervals. In FIG. 10, 21 is an inner ring, 22 is an outer ring, 23 is a tapered roller, 24 is a cage, 25 is a large-diameter side annular part, 26 is a small-diameter side annular part, and 27 is a pillar part.

There is a slight gap in the axial direction and the radial direction between the hook portion 30 and the notch portion 32, whereby the cage 24 is slightly movable in the axial direction and the radial direction. That is, the cage 24 is not in contact with the flange 31 of the inner ring 21 during operation, and the cage 24 is caught by the flange 31 during non-operation.
Japanese Utility Model Publication No. 58-165324

  By the way, the cage 24 provided with the hook portion 30 has a complicated shape, and in the case of a resin cage, it is difficult to mold, and the size, position, etc. of the hook portion 30 are limited by the molding die. For this reason, it is difficult to integrally mold the cage 24 that functions as the hook portion 30. Further, the metal cage is similarly inferior in formability, and waste of materials due to punching for forming the hook portion 30 has occurred.

Further, the tapered roller bearing shown in FIG. 10 is assembled by the method described below. First, the tapered rollers 23 are stored in the pockets 28 of the cages 24. Thereafter, the inner ring 21 is fitted into the assembly of the cage 24 and the tapered roller 23. In other words, the combination of the cage 24 and the tapered roller 23 is externally fitted to the inner ring 21. For this reason, in the case where the hooking portion 30 is provided as shown in FIG. 10, when the tapered rollers 23 are arranged on the cage 24, the hooking portion 30 becomes an obstacle and the assemblability in the conventional machine is deteriorated. .

  In view of the above-mentioned problems, the present invention can reliably mold what functions as a hook portion, can improve the assemblability of a tapered roller, and can extend the axial length of the roller. Thus, a tapered roller bearing capable of increasing the rated load and a method for manufacturing the same are provided.

  The tapered roller bearing of the present invention includes an inner ring, an outer ring, a plurality of tapered rollers arranged to roll between the inner ring and the outer ring, and a cage that holds the tapered rollers at a predetermined circumferential interval. A flange for guiding the tapered roller is provided only on the large diameter side of the outer diameter surface of the inner ring, and the cage includes a large diameter annular portion, a small diameter annular portion, a large diameter annular portion, and a small diameter side. A retainer main body comprising a column portion connecting the annular portion and a hook member engageable with the flange portion of the inner ring, and the retainer main body and the hook member are mounted with a tapered roller on the retainer; Tapered roller bearings connected via an engagement structure that enables integration in a closed state, wherein the engagement structure includes a notch provided on the outer peripheral edge of the hook member and a large diameter side of the cage A fitting piece that extends axially outward from the annular portion and fits into the notch from the outer diameter direction; It is obtained by a locking piece portion from the outer edges of the fitting piece portion extending radially inward to engage the outer end surface of the outer peripheral side of the hook member.

  According to the tapered roller bearing of the present invention, the flange portion and the fillet portion on the small diameter side of the inner ring that existed in the prior art are omitted. For this reason, the raceway surface can be made large only in this omitted collar portion and fillet portion. In addition, since the hook is provided on the cage to engage with the flange portion of the inner ring, it is possible to prevent the tapered roller from falling off to the small end side. Further, the cage body and the hook member can be formed separately. Thereby, hook members of various sizes can be formed.

  Since the cage main body and the hook member are connected via the engagement structure, the cage main body and the hook member can be integrated in a state where the tapered roller is attached to the cage main body.

  The fitting piece portion is fitted to the hooking member from the outer diameter direction, and the locking piece portion is engaged with the outer peripheral side outer end surface of the hooking member. Therefore, the axial direction and the circumferential direction of the cage body and the hooking member Can be regulated.

  The engagement structure may be configured such that at least a plurality of notches and a plurality of fitting pieces that are respectively fitted thereto are arranged at a predetermined pitch along the circumferential direction. Thereby, the stable connection force of a holder main body and a hook member is securable.

  The hook member is formed of a ring body that is continuous in the circumferential direction, and the notch portion can be provided on an outer peripheral edge of the ring body. Thereby, the hook member can be stably engaged with the flange portion of the inner ring.

  The hook member includes a ring portion and a protruding piece protruding from the ring portion in the inner diameter direction, and the notch portion can be provided on an outer peripheral edge portion of the ring portion. For this reason, the material required for manufacturing the hook member can be further reduced, and the weight of the cage can be further reduced.

  A recess can be provided on the outer peripheral side of the outer end surface of the hook member to form a thin portion on the outer peripheral portion of the hook member, and the cutout portion can be provided in the thin portion. As a result, the locking piece portion can be brought into contact with the axially outer end surface of the thin portion, and the protruding amount of the locking piece portion outward in the axial direction can be suppressed.

  The hook member can be made of metal or resin. In particular, when the cage body and the hook member are made of resin, the resin used can be PPS. PPS (polyphenylene sulfide) is a crystalline polymer having a melting point of about 280 ° C., which has extremely high heat resistance, strength, rigidity, and excellent dimensional stability, and at the same time has excellent molding processability as a thermoplastic resin. Heat resistant engineering plastic.

  In the tapered roller bearing of the present invention, the flange portion on the small diameter side of the inner ring, which has existed in the past, is omitted. For this reason, it is possible to reduce the weight of the omitted flange portion. Furthermore, the raceway surface is enlarged only in the omitted small-diameter side flange and fillet portion, thereby the axial center length of the tapered roller can be increased, the load capacity can be improved, and a longer life can be achieved. Can do.

  In particular, the cage body and the hook member can be formed separately, and hook members of various sizes can be formed. For this reason, the cage functioning as a hooking member can be reliably molded. In addition, since it is possible to integrate in a state where the tapered roller is attached to the cage, it is possible to improve the incorporation of the tapered roller. Furthermore, since the axial displacement and circumferential displacement between the cage main body and the hooking member can be restricted, even if an external force is applied to the cage during operation, the hooking member is prevented from shifting axially and circumferentially. Can be prevented. Thereby, it is possible to prevent the retainer body and the hook member from being separated during operation, and the hook members that are separated from each other are scattered to the outside, and the device using the tapered roller bearing is not adversely affected. For this reason, the tapered roller bearing using this cage can exhibit a stable function over a long period of time.

  If the engagement structure is arranged at a predetermined pitch along the circumferential direction, a stable coupling force between the cage body and the hook member can be secured, so that the separation between the cage body and the hook member is further prevented. Therefore, the tapered roller bearing using the cage can exhibit a more stable function over a long period of time. In addition to forming the engagement structure over the entire circumference, it is possible to reduce the material necessary for manufacturing the engagement structure, reduce the weight of the cage, and contribute to cost reduction. .

  When the hook member is constituted by a ring body that is continuous in the circumferential direction, the hook member can be stably engaged with the flange portion of the inner ring, and the tapered roller can be further prevented from falling off to the small end side. Further, it is possible to further improve the embedding property.

  When the hook member is composed of a ring portion and a protruding piece protruding in the inner diameter direction from the ring portion, the material necessary for manufacturing the hook member can be further reduced and the weight of the cage can be further reduced. Can contribute to cost reduction.

  When the locking piece part is brought into contact with the axially outer end surface of the thin wall part, the protruding amount of the locking piece part in the axially outward direction can be suppressed, and the weight reduction and compactness of the cage can be achieved. Can do.

  The hook member can be made of metal. Thereby, the intensity | strength of a hook member becomes large.

  Further, the hook member can be made of resin. Resin cages are lighter in weight, self-lubricating, and have a smaller coefficient of friction than metal cages. Can be suppressed. It is also suitable for reducing torque loss when starting the bearing. In particular, when a cage made of PPS is used, it is excellent in heat resistance, rigidity, and the like.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  FIG. 1 shows an embodiment of a tapered roller bearing according to the present invention. This tapered roller bearing has a plurality of tapered rollers arranged between an inner ring 51, an outer ring 52, and an inner ring 51 and an outer ring 52 so as to be freely rollable. The roller 53 and the holder | retainer 54 which hold | maintains the tapered roller 53 at the circumference predetermined spacing are provided.

  The inner ring 51 has a conical raceway surface 55 on the outer diameter surface thereof, and a flange portion 56 protruding outward is formed on the larger diameter side of the raceway surface 55, and a notch portion is formed on the outer diameter surface of the flange portion 56. 63 is provided. A corner portion 57 between the raceway surface 55 and the flange portion 56 is formed with a thin portion 57. Further, the inner surface (that is, the side surface on the small diameter side) 56 a of the flange portion 56 is inclined by a predetermined angle with respect to a plane orthogonal to the bearing axis P. That is, as shown in FIG. 1, when the tapered roller 53 is fitted to the raceway surface 55 of the inner ring 51, the peripheral wall 53 a of the roller 53 contacts (contacts) the raceway surface 55, and the large end surface of the tapered roller 53. The angle formed by the raceway surface 55 and the inner surface 56a of the flange 56 is adjusted to the angle formed by the peripheral wall 53a of the roller 53 so that 53b contacts (contacts) the inner surface 56a of the flange 56. For this reason, the collar portion 56 receives the axial load through the tapered roller 53 and guides the tapered roller 53 to rotate.

  The outer ring 52 has a tapered raceway surface 58 on its inner diameter surface, and a plurality of tapered rollers 53 held by a cage 54 roll between the raceway surface 58 and the raceway surface 55 of the inner ring 51. become.

In this tapered roller bearing, the tapered roller 53 and the raceway surfaces 55 and 58 of the inner and outer rings 51 and 52 are in line contact, and the extension lines of the inner and outer ring raceway surfaces 55 and 58 and the roller center line O are on the axis P. Designed to match one point (not shown).

  As shown in FIGS. 1 and 2, the retainer 54 includes a retainer body 61 and a hook member 62. The cage body 61 includes a large-diameter-side annular portion 54a, a small-diameter-side annular portion 54b, and a column portion 54c that connects the large-diameter-side annular portion 54a and the small-diameter-side annular portion 54b. A pocket 54d for holding the tapered roller 53 is formed between the column portions 54c. The cage main body 61 and the hook member 62 are connected via an engagement structure 75. The engagement structure 75 includes a notch 73 (see FIG. 5 and the like) provided on the outer peripheral edge of the hook member 62, a fitting piece 72 fitted to the notch 73 from the outer diameter direction, and the hook member 62. And a locking piece 71 that locks to the outer end surface of the outer peripheral side.

  As shown in FIGS. 3 and 4, protrusions 81 are provided on the outer end surface 82 of the large-diameter annular portion 54 a of the cage body 61 at a predetermined pitch (for example, 60 ° pitch) along the circumferential direction. Yes. That is, the protrusion 81 includes the fitting piece 72 that extends outward in the axial direction from the large-diameter-side annular portion 54 a of the cage 54, and the engagement that extends in the inner diameter direction from the outer edge of the fitting piece 72. And a stop piece 71. A radially inner end edge of the locking piece 71 has a rounded portion 78 having a semicircular cross section.

  Further, as shown in FIGS. 5 and 6, the hook member 62 includes a ring body 69 continuous in the circumferential direction, and a predetermined pitch (for example, 60 ° pitch) along the circumferential direction on the outer peripheral edge of the ring body 69. A notch 73 is provided. That is, the concave portion 79 is provided on the outer peripheral side of the outer end surface of the hook member 62, the thin portion 80 is formed on the outer peripheral portion of the hook member 62, and the notch 73 is provided in the thin portion 80. In this case, the thin-walled portion 80 includes a first portion 80a having a constant thickness and a second portion 80b having an inclined surface 74 whose outer surface expands from the outer diameter side toward the inner diameter side. And the 1st part 80a is notched (it abbreviate | omitted) and the notch part 73 is formed.

  As shown in FIGS. 2 and 7, the locking piece 71 is engaged with the notch 73. That is, the fitting piece portion 72 is fitted to the notch portion 73 from the outer diameter direction, and the axial inner surface 67 of the round portion 78 of the locking piece portion 71 is the outer end surface (inclined surface 74) on the outer peripheral side of the hook member 62. ). Thereby, the cage main body 61 and the hooking member 62 are integrated. In this state, the retainer 54 is slightly movable in the axial direction and the radial direction. That is, the hook member 62 is in a non-contact state with the flange portion 56 of the inner ring 51 during operation, and is caught by the flange portion 56 of the inner ring 51 during non-operation.

  Further, the outer end surface 62 a of the hook member 62 is disposed on the same surface as the large-diameter end surface 51 a of the inner ring 51 or is positioned axially inward from the large-diameter end surface 51 a of the inner ring 51. Note that the end surface 52 a on the large end surface 53 b side of the roller 53 of the outer ring 52 is positioned axially inward from the end surface 51 a of the inner ring 51.

  By the way, the hook member 62 may be manufactured by pressing a metal plate or may be formed by molding a synthetic resin material. As the metal plate, a hot rolled steel such as SPHC, a cold rolled steel such as SPCC, a cold rolled steel such as SPB2, a brushed steel for bearings, or the like can be used. The synthetic resin material is preferably made of PPS. PPS (polyphenylene sulfide) is a crystalline polymer having a melting point of about 280 ° C., which has extremely high heat resistance, strength, rigidity, and excellent dimensional stability, and at the same time has excellent moldability as a thermoplastic resin. It is a heat-resistant engineering plastic.

  To assemble this tapered roller bearing, first, the tapered roller 53 is accommodated in each pocket 54 d of the cage 54. Next, after each tapered roller 53 is stored in the pocket 54d of the cage 54, the fitting piece 72 of the cage body 61 is fitted into the notch 73 of the hooking member 62 from the outer diameter direction, and the locking is performed. The axially inner surface 67 of the rounded portion 78 of the piece portion 71 is engaged with and engaged with the inclined surface 74 of the hooking member 62 from the outside to integrate the two members, that is, the cage main body 61 and the hooking member 62. One cage 54 is formed, and a combination of the cage 54 and the tapered roller 53 is formed.

  Thereafter, the inner ring 51 is fitted into the assembly of the cage 54 and the tapered roller 53. In other words, an assembly of the cage 54 and the tapered roller 53 is externally fitted to the inner ring 51. At this time, the hook member 62 needs to be fitted into the notch 63 of the inner ring 51.

  Next, a tapered roller bearing in which the inner ring 51, the tapered roller 53, the cage 54, and the outer ring 52 are integrated is assembled by combining the outer ring 52 with a combined body of the inner ring 51, the tapered roller 53, and the cage 54. It will be.

  As described above, in the present invention, the small-diameter side flange portion and the loose portion of the inner ring 51 that existed in the prior art are omitted. For this reason, this omission part and weight reduction can be achieved. Further, the raceway surface 55 can be made large only in the omitted collar portion and the fillet portion, the axial center length of the tapered roller 53 can be increased, the load capacity can be improved, and a longer life is achieved. be able to. Further, since the retainer 54 is provided with the hook member 62 that engages with the flange portion 56 of the inner ring 51, it is possible to prevent the tapered roller 53 from falling off to the small end side.

  The cage main body 61 and the hook member 62 can be formed separately, and hook members 62 of various sizes can be formed. For this reason, the retainer 54 that functions as the hook member 62 can be reliably molded.

  Since the cage main body 61 and the hooking member 62 are connected via the engagement structure 75, the cage main body 61 can be integrated in a state where the tapered roller 53 is mounted. For this reason, the improvement of the incorporation property of the tapered roller 53 can be aimed at. Furthermore, since the fitting piece 71 is fitted to the hooking member 62 from the outer diameter direction, and the locking piece 72 is engaged with the outer peripheral side outer end surface of the hooking member 62, the retainer body 61 and the hooking member A shift in the axial direction and circumferential direction with respect to 62 can be regulated. Accordingly, even when an external force is applied to the cage 54 during operation, the hook member 62 can be prevented from shifting in the axial direction and the circumferential direction, and the cage body 61 and the hook member 62 are separated during operation. It is possible to prevent this, and the hooking member 62 that is spaced apart does not scatter and the device using the tapered roller bearing is not adversely affected. For this reason, the tapered roller bearing using this cage can exhibit a stable function over a long period of time.

  When the engagement structure 75 is arranged at a predetermined pitch along the circumferential direction, a stable coupling force between the cage main body 61 and the hook member 62 can be secured. Separation can be further prevented, and the tapered roller bearing using the cage 54 can exhibit a more stable function over a long period of time. Further, it is possible to reduce the material necessary for manufacturing the engaging structure 75 and to reduce the weight of the cage 54, which contributes to cost reduction, rather than forming the engaging structure 75 over the entire circumference. be able to.

  The hook member 62 includes a ring body 69 that is continuous in the circumferential direction, and the notch 73 can be provided on the outer peripheral edge of the ring body 69. As a result, the hook member 62 can be stably engaged with the flange portion 56 of the inner ring 51, and the tapered roller 53 can be further prevented from falling off to the small end side, thereby further improving the ease of incorporation. be able to.

  A recess 79 is provided on the outer peripheral side of the outer end surface of the hook member 62 to form a thin portion 80 on the outer peripheral portion of the hook member 62, and the notch 73 can be provided in the thin portion 80. Thereby, the locking piece 71 can be brought into contact with the axially outer end surface of the thin portion 80, and the protruding amount of the locking piece 71 in the axially outward direction can be suppressed. Thereby, weight reduction and compactization of the retainer 54 can be achieved.

  The hook member 62 can be made of metal. Thereby, the strength of the hook member 62 is increased.

  The hook member 62 can be made of resin. Resin cages are lighter in weight, self-lubricating, and have a smaller coefficient of friction than metal cages. Can be suppressed. It is also suitable for reducing torque loss when starting the bearing. In particular, when the cage main body 61 and the hook member 62 are made of PPS, the hook member 62 has excellent heat resistance, rigidity, and the like.

  Although not shown, the hooking member 62 can be composed of a ring portion and protruding pieces that protrude from the ring portion in the inner diameter direction at a predetermined pitch. That is, as shown in FIG. 11, the protruding pieces are flat rectangular pieces extending in the inner diameter direction from the ring portion, and a plurality of protruding pieces can be provided at equal intervals in the circumferential direction. And the notch part 73 can be provided in the outer-periphery edge part of a ring part. Thereby, the material necessary for manufacturing the hook member 62 can be further reduced, and the weight of the cage 54 can be further reduced, which contributes to cost reduction.

  As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the inclined surface 74 does not have a flat surface, but has a convex curved surface or a concave surface. It may be a curved surface. The depth dimension of the notch 73 can be arbitrarily set as long as the fitting piece 72 is engaged. On the contrary, even if the size of the fitting piece portion 72 is sufficient as long as it can be fitted to the cutout portion 73, various changes can be made according to the size of the cutout portion 73. In addition, although the radially inner end edge of the locking piece portion 71 is the round portion 78 having a semicircular cross section, it may be a flat inclined surface. Furthermore, the arrangement pitch of the protrusions 81 and the notches 73 may not be 60 °, and can be set at an arbitrary pitch. That is, it is sufficient if there is at least one protrusion 81 and a corresponding notch 73.

  When the hook member 62 includes a ring portion and protruding pieces protruding from the ring portion in the inner diameter direction at a predetermined pitch, the number of protruding pieces is arbitrary as long as it has one or more places. As the shape of the projecting piece, various shapes such as a rectangle, a square, a triangle, a fan shape, and a semicircle can be adopted. Further, the position of the protruding piece may be shifted from the position of the pocket 54d, or may have a size straddling the plurality of column portions 54c. In the embodiment, the notch 63 of the inner ring 51 is opened on the end surface on the large diameter side of the inner ring 51, but an annular groove formed on the outer diameter surface of the flange portion 56 without opening on the end surface. You may comprise.

  In the above embodiment, the tapered roller 53 is accommodated in each pocket 54 d of the cage 54, and then the hook member 62 is incorporated, and the inner ring 51 is fitted into the assembly of the cage 54 and the tapered roller 53. The hook member 62 may be incorporated after the tapered roller 53 is accommodated in the cage body 61 and incorporated in the inner ring 51. Further, the number of pockets 54d of the cage 64 can be variously changed according to the number of tapered rollers 53 to be held. Further, the length and thickness of the column part 54c can be variously changed as long as the tapered roller 53 can be held.

  This tapered roller bearing can be used for a differential or a transmission of an automobile, and can be used for various parts where a tapered roller bearing can be conventionally used. The tapered roller bearing may be a single row or a double row.

It is principal part sectional drawing of the tapered roller bearing which shows embodiment of this invention. It is a principal part expanded sectional view of the tapered roller bearing of the said FIG. It is a principal part expanded sectional view of the cage main-body part used for the tapered roller bearing of the said FIG. It is a principal part enlarged front view of the cage main-body part used for the tapered roller bearing of the said FIG. It is a principal part expanded sectional view of the hook member of the holder | retainer used for the tapered roller bearing of the said FIG. It is a principal part enlarged front view of the hook member of the retainer used for the tapered roller bearing of the said FIG. It is a principal part enlarged front view of the retainer of the tapered roller bearing of the said FIG. It is sectional drawing of the conventional tapered roller bearing. It is a perspective view of the retainer of the tapered roller bearing of FIG. It is principal part sectional drawing of the other conventional tapered roller bearing. It is a principal part side view of the other conventional tapered roller bearing.

Explanation of symbols

51 Inner ring 52 Outer ring 53 Tapered roller 54 Cage 54a Large-diameter side annular part 54b Small-diameter side annular part 54c Pillar part 56 Hook part 61 Cage body 62 Hook member 69 Ring body 71 Locking piece part 72 Fitting piece part 73 Notch part 75 Engagement structure 79 Recess 80 Thin portion

Claims (8)

The inner ring includes an inner ring, an outer ring, a plurality of tapered rollers arranged to roll between the inner ring and the outer ring, and a retainer that holds the tapered rollers at a predetermined circumferential interval. And a cage that connects the large-diameter side annular part, the small-diameter-side annular part, and the large-diameter-side annular part and the small-diameter-side annular part. The cage body and the hook member that can be engaged with the collar portion of the inner ring, and the cage body and the hook member can be integrated with the tapered roller attached to the cage. Tapered roller bearings connected via an engagement structure
The engaging structure includes a notch portion provided at an outer peripheral edge portion of the hook member, and a fitting piece portion extending outward in the axial direction from the large-diameter side annular portion of the cage and fitting into the notch portion from the outer diameter direction. And a locking piece portion that extends in the inner diameter direction from the outer end edge portion of the fitting piece portion and engages with the outer end surface on the outer peripheral side of the hooking member.   2. The tapered roller bearing according to claim 1, wherein the engagement structure includes at least a plurality of notches and a plurality of fitting pieces respectively fitted to the notches at a predetermined pitch along a circumferential direction.   The tapered roller bearing according to claim 1 or 2, wherein the hook member is formed of a ring body that is continuous in a circumferential direction, and the notch portion is provided on an outer peripheral edge of the ring body.   The said hooking member consists of a ring part and the protrusion piece which protrudes in an internal diameter direction from this ring part, The said notch part was provided in the outer-periphery edge part of the ring part. The tapered roller bearing according to any one of the items.   The concave portion is provided on the outer peripheral side of the outer end surface of the hook member, a thin portion is formed on the outer peripheral portion of the hook member, and the cutout portion is provided in the thin portion. 1 tapered roller bearing.   The tapered roller bearing according to any one of claims 1 to 5, wherein the hook member is made of metal.   The tapered roller bearing according to any one of claims 1 to 5, wherein the hook member is made of resin.   The tapered roller bearing according to any one of claims 1 to 7, wherein the resin used for the cage is PPS.

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