JP2005147365A - Retainer for conical roller bearing and assembling method of conical roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of assembling a conical roller bearing simply and with good dimensional accuracy while preventing deterioration of quality due to plastic working of a column part. <P>SOLUTION: In this annular retainer 10, two or more pocket holes 16 storing a conical roller 2o are formed at spaces in the circumferential direction, and both swollen parts 17 projected toward the outside diameter are provided on both side edge parts of the pocket holes 16. The roller 20 is stored in the pocket hole 16 of the retainer 10 from the inner peripheral side, and an inner ring 2 of the bearing is fitted in the interior of the retainer 10. In this fitting state, both side swollen parts 17 are caulked inside, whereby the roller 20 is guided and held by both swollen parts 17 and simultaneously brought into contact with the inner ring 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for assembling a tapered roller bearing provided in a rotating mechanism portion of various mechanical devices, and a cage for a tapered roller bearing incorporated in the bearing.

  A roller bearing using a cylindrical roller, a tapered roller, a needle roller, a spherical roller, or the like as a rolling element has a larger load capacity and higher rigidity than a ball bearing, and is therefore preferably used for a rotation support portion where a large load is applied. . Above all, tapered roller bearings incorporating a truncated cone roller can support both radial and thrust loads, and have a large load resistance. Therefore, drive devices, reduction gears, axles in automobiles, railway vehicles, various mechanical devices, etc. Widely used in parts.

  As shown in FIG. 7, the tapered roller bearing (1) is provided with an inner ring (2) having a tapered inner ring raceway (2a) on the outer peripheral surface and a tapered outer ring raceway (3a) on the inner peripheral surface. A plurality of tapered rollers (4) disposed between the inner ring raceway (2a) and the outer ring raceway (3a) are incorporated between both wheels (2) and (3). It is held by a cage (5) so as to roll freely.

  As shown in FIG. 8, the cage (5) includes, for example, a large-diameter annular part (5a) provided on the upper end side, and a coaxial core with the large-diameter annular part (5a) provided on the lower end side. A small-diameter annular part (5b) arranged on the upper side and a plurality of pillar parts (5c) arranged between the annular parts (5a) and (5b) and arranged at predetermined intervals in the circumferential direction. It is composed of a metal press-molded product that is integrally formed. The cage (5) has a plurality of rectangular pocket holes (6) surrounded by the upper and lower circular parts (5a) (5b) and the adjacent column part (5c) at a predetermined interval in the circumferential direction. The roller (6) is provided at intervals, and is configured to be accommodated and held in each pocket hole (6) so as to be freely rollable.

  Such a metal tapered roller bearing retainer (5) is usually constituted by a press-molded product obtained by pressing a metal plate. As this metal plate material, steel plates such as SPCC (JIS standard: cold rolled steel plate), SPHC (JIS standard: hot rolled steel plate), SPB1 and SPB2 (BAS standard (Japanese bearing industry standard): low carbon steel plate) are used. It has been.

  When manufacturing the above-mentioned tapered roller bearing retainer (5) by pressing, for example, as shown in Patent Document 1 below, a blank obtained by punching a steel plate material is subjected to pressing such as drawing. A substantially cylindrical drawn product having a taper on the peripheral wall is obtained. The peripheral wall of the drawn product is punched at a predetermined interval to form a plurality of rectangular pocket holes (6). Further, the column portion (5c) between the pocket holes (6) is chamfered to form a chamfered portion for guiding the rollers (4). Further, the lower wall of the drawn product is punched to form a small-diameter annular portion (5b), and the upper edge is further cut to form a flat large-diameter annular portion (5a).

  When assembling the bearing (1) using such a cage (5), each roller (4) is accommodated in each pocket hole (6) of the cage (5), and the cage ( 5) The inner ring (2) is fitted into the inner side of the inner ring (2) from above, and the lower collar part (2b) of the inner ring (2) is prevented from interfering with the lower end part (4a) of the roller (4) when fitted. For this reason, the pillar portion (5c) of the cage (5) is deformed in advance so as to expand outward.

  That is, as shown in FIG. 9, the bottom expanding punch (7) is inserted into the retainer (5) from above, and the pillar (5c) of the retainer (5) is inserted as shown in FIG. The lower part (5d) is plastically deformed so as to expand outward, and the width dimension (circumferential dimension) at the bottom of each pocket (6) is expanded more than the width dimension in the initial state (assembled state). Keep it.

  After the bottom expansion processing is performed in this way, as shown in FIG. 11, the rollers (4) are accommodated from the inside in the pockets (6) that are expanded. At this time, since each pocket (6) has a large width dimension, the roller (4) is arranged so that the lower part thereof is located outside the normal position after assembly (see FIG. 6). The inscribed inner diameter of the roller (6) is expanded with respect to the assembled state.

  Then, as shown in an imaginary line in FIG. 11 and FIG. 12, the bearing inner ring (2) is fitted into the cage (5) from above. At this time, since the inscribed inner diameter of the roller (4) in the cage (5) is enlarged, the lower flange (2b) of the inner ring (2) interferes with the lower end (4a) of the roller (4). The inner ring (2) can be securely fitted to a predetermined position in the cage (5) without any problems.

  After fitting the inner ring (2), the upper end side of the cage (5) is restrained by the restraining die (8a), and as shown in FIG. 13, the caulking metal is placed outside the cage (5). The mold (8b) is externally fitted. As a result, the pillar portion (5c) of the cage (5) is pushed back inward and plastically deformed to the original state (assembled state), and at the same time, each roller (4) is pushed inwardly and the inner ring It is placed in contact with the track (2a).

Then, as shown in FIG. 7, the bearing (1) is assembled by assembling the outer ring (3) on the outside of the cage (5).
JP-A-8-326761 (first column 37 line-3 column 1 line, FIG. 5)

  In the conventional cage (5), when assembling to the inner ring (2), the column portion (5c) is pushed outward to expand the pocket width, but the column portion (5c) is expanded. At that time, the length dimension (vertical dimension) of the pocket hole becomes small. Therefore, when the tapered roller (4) is accommodated in the pocket hole (6), the upper end of the roller (4) interferes with the upper end of the pocket hole (6), so that the insertion into the pocket hole (6) is smooth. There was a risk that it could not be done. In particular, when the inclination angle of the column portion (5c) is large with respect to the axial center of the cage (5), the angular deformation of the column portion (5c) with respect to the axial center due to the bottom expansion processing becomes large. In the wide-angle type cage in which the length of the hole (6) tends to be shortened and the cup angle exceeds 50 °, the above problem often occurs.

  By the way, if the length dimension of the pocket hole (6) in the cage (5) before the bottom expansion process is set sufficiently larger than the length dimension of the tapered roller (4), the pocket is expanded by the bottom expansion process. Even if the length of the hole (6) is slightly reduced, the roller (4) can be accommodated in the pocket hole (6) without difficulty. However, if the pocket hole (6) is formed to have a large length dimension, the pocket hole (6) is formed when the pillar (5c) is plastically deformed after the inner ring (2) is fitted. The length dimension of the roller (4) becomes large, and an unnecessarily large gap is formed between the upper and lower end surfaces of the roller (4) and the upper and lower end portions of the pocket hole (6). ) Rattles in the vertical direction (axial direction), causing problems such as harmful vibration and noise.

  Further, in the above conventional cage (5), before and after the roller (4) is assembled, the column part (5c) is plastically deformed twice, ie, the bottom expansion process and the caulking process. As a result, the durability of the pillar part (5c) is lowered due to the deterioration of physical properties, and the pillar part (5c) is scratched by the spread of the bottom spreading punch (7), resulting in deterioration of the quality. ing.

  On the other hand, in the conventional cage (5), a chamfered portion is formed by coining on the inner side in the plate thickness direction on both side surfaces of the inner peripheral surface of the pocket hole (6). However, this guide surface can only be formed up to about half the thickness of the plate, and there are cases where a sufficient roller guide holding surface cannot be secured. There was a fear that it was not kept in a stable state.

  Moreover, if the thickness of the material constituting the cage (5) is set to be thick, the chamfered portions (guide holding surfaces) on both side surfaces of the pocket hole (6) can be formed large, but if the thickness is increased, There is a problem that not only does the weight increase, the rotational torque increases, and good rotation characteristics cannot be obtained, but also the inertia force increases due to the increase in weight, resulting in a decrease in impact resistance. In addition, when the plate thickness is increased, the material cost is increased, and equipment with a large processing capacity is required, which causes a problem of increasing the cost.

  Furthermore, when both sides of the pocket hole (6), that is, both sides of the column (5c) are pressed by coining, both sides of the pocket hole are deformed due to movement of the meat, and the pocket length and the pocket width are reduced. There was also a risk that the dimensional accuracy would be reduced.

  The present invention has been made in view of the above circumstances, and can prevent deterioration of quality due to plastic processing of the column part.Furthermore, the roller can be held in the pocket hole in a stable state with high positional accuracy, and has good rotation characteristics. Provided are a tapered roller bearing retainer that can be obtained and reduced in weight, and that can easily and accurately perform bearing assembly work, and a method of assembling a tapered roller bearing using the retainer. For the purpose.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided an annular cone having a plurality of pocket holes which are arranged along an inner ring and an outer ring of a bearing and in which a plurality of pocket holes for accommodating tapered rollers are formed at intervals in the circumferential direction. A roller bearing retainer, wherein both side bulges of the pocket hole are provided with bulges on both sides projecting in the outer diameter direction, and the rollers are guided and held by the bulges on both sides. This is the gist.

  If the cage of the first invention is used, the tapered roller bearing can be easily and accurately assembled. That is, the roller is accommodated in the pocket hole of the cage so that the roller is positioned outside the normal position, and the inner ring is fitted inside the cage while the inner diameter of the roller is expanded. Can be smoothly fitted to a predetermined position in the cage without interfering with the rollers. Further, after fitting the inner ring, crimp the rollers so that the bulges on both sides of the cage are bent inwardly toward the inner diameter side (pocket hole side). Can do.

  Thus, in the cage of the present invention, since the rollers can be accommodated in the pocket holes and the inner ring can be fitted without expanding the pillar portions on both sides of the pocket holes, the pocket holes accompanying the pushing and bending of the pillar portions. Can be prevented, and the vertical dimension (length dimension) of the pocket hole can be ensured to be sufficiently large in the initial state. Therefore, the rollers can be smoothly inserted and arranged in the pocket holes, and the roller insertion operation and, consequently, the bearing assembly operation can be performed easily and accurately.

  Furthermore, in the cage of the present invention, the column portion does not have to be plastically deformed, so that the size of the pocket hole does not change, and the dimensional accuracy of the pocket hole can be improved.

  Furthermore, since the cage of the present invention does not need to plastically deform the column portion, it is possible to prevent the physical properties from being deteriorated due to plastic processing, and to improve the durability of the cage, and consequently the durability of the entire bearing, It is possible to prevent the column portion from being damaged when the column portion is caulked, and high quality can be obtained.

  Furthermore, in the present invention, the roller guide holding portion is formed by the bulging portions on both side edges of the pocket hole. Therefore, unlike the conventional case where the roller guide holding portion is formed by coining, coining is performed. It is possible to prevent the dimensional accuracy from being lowered due to processing, and to maintain higher dimensional accuracy.

  Further, in the present invention, since the roller guide holding portion is formed by the bulging portion, the size of the guide holding portion can be sufficiently ensured regardless of the thickness of the material constituting the cage. Accordingly, it is possible to reduce the thickness of the material, and accordingly, it is possible to reduce the weight of the entire cage.

  In this 1st invention, it is preferable to employ | adopt the structure by which the said both side bulging part is formed by the bending part provided in the both-sides edge part of the said pocket hole.

  That is, when this configuration is adopted, the bulging portions on both sides can be easily formed with high precision by press working or the like, so that the production efficiency can be improved and the dimensional accuracy can be further improved. .

  In the first aspect of the invention, when one side in the axial direction is the upper side and the other side is the lower side, the upper and lower end portions of the both side bulging portions are spaced apart from the upper and lower end portions of the pocket hole in the vertical direction. It is preferable to adopt a configuration in which the two are arranged.

  That is, when this configuration is adopted, the rollers can be guided and held in a more stable state by the bulging portions on both sides, and good rotation characteristics can be obtained.

  On the other hand, this 2nd invention specifies one form of the manufacturing process at the time of assembling a bearing using the holder | retainer of the said 1st invention.

  That is, according to the second aspect of the present invention, a plurality of pocket holes in which the tapered rollers are accommodated are formed at intervals in the circumferential direction, and both side bulging portions protruding in the outer diameter direction are provided at both side edges of the pocket holes. An annular cage is prepared, a roller is accommodated from the inner peripheral side in the pocket hole of the cage, and an inner ring of a bearing is fitted into the cage, and the both side bulges are fitted in the fitted state. The gist of the invention is to make the roller contact with the inner ring while guiding and holding the roller by the bulging portions on both sides by caulking the portion inward.

  In the second aspect of the invention, it is possible to reliably obtain the same effects as those of the first aspect of the invention.

  As described above, according to the present invention, it is possible to prevent quality deterioration due to plastic processing of the column part, and furthermore, it is possible to hold the roller in the pocket hole in a stable state with high positional accuracy, and to obtain good rotation characteristics. In addition, the weight can be reduced, and the bearing assembly operation can be performed easily and accurately.

  1 to 4 are views showing a tapered roller bearing retainer (10) according to an embodiment of the present invention. As shown in these drawings, the cage (10) includes an annular portion (11) (12) provided on one end side (upper end side) and the other end side (lower end side) in the axial direction, A press-formed product made of a steel plate integrally connecting a plurality of column portions (15) that connect the annular portions (11) and (12) and are arranged in parallel at predetermined intervals along the circumferential direction. It is configured. The upper ring part (11) and the lower ring part (12) are arranged on the same axis, and the upper ring part (11) has a diameter dimension relative to the lower ring part (12). Largely formed. Further, the cage (10) has a plurality of rectangular pocket holes (16) surrounded by adjacent column parts (15) and upper and lower circular parts (11), (12) at predetermined intervals in the circumferential direction. Is provided.

  Moreover, the both side bulging part (17) which protrudes in an outer-diameter direction is formed in the both-sides edge part of the pocket hole (16) of this holder | retainer (10).

  In order to manufacture this cage (10), first, a blank product is obtained by punching a steel plate material, and the blank product is drawn to obtain a substantially cylindrical drawn product having a taper on the peripheral wall.

  Subsequently, a pocket hole forming portion in the peripheral wall of the drawn product is punched from the inner diameter side toward the outer diameter side to form a prepared hole. The lower hole is formed in a shape in which protruding portions for forming the bulging portion are formed on both side edge portions, in other words, in a substantially I shape having a wide intermediate portion.

  Next, a punch is punched into the lower hole of the drawn product from the inner diameter side to the outer diameter side, and the protruding portions at both side edges of the lower hole are pushed and bent to form a pocket hole (16) having a predetermined size. At the same time, both side bulges (17) are formed on both side edge portions of the pocket hole by the bent portion.

  Thereafter, the lower wall of the drawn product is punched out to form the lower end annular portion (12) and the upper end edge portion is cut to form the upper end annular portion (11), as in the prior art. Is.

  Here, in this embodiment, as will be described in detail later, the opening angle (θ) to the outside of the bulging portions (17) on both sides of the cage (10) before assembly to the bearing (immediately after the cage is manufactured) (see FIG. 4) is formed larger than the outward opening angle (θ) of the bulging portions (17) on both sides in the bearing assembly completed state.

  In order to assemble a bearing using the cage (10) of the present embodiment having the above-described configuration, first, the rollers (20) are accommodated from the inner diameter side in the pocket holes (16) of the cage (10). At this time, as shown in FIG. 4 imaginary line and FIG. 5, since the opening angle (θ) to the outside in the bulging portions (17) on both sides of the pocket hole (16) is formed large, the roller (20) The lower part is arranged so as to be located outside the normal position in the assembled state (solid line state in FIG. 4), and the inscribed inner diameter of the roller (20) is enlarged.

  With the roller (20) thus housed, the bearing inner ring (2) is fitted from above into the cage (10) as shown in phantom lines in FIG. At this time, since the inscribed inner diameter of the roller (20) in the cage (10) is enlarged, the lower flange (2b) of the inner ring (2) interferes with the lower end (20a) of the roller (20). The inner ring (2) can be securely fitted up to a predetermined position in the retainer (10).

  Subsequently, as shown in FIG. 6, the bulging portions (17) on both sides of the pocket hole in the cage (10) are pushed and bent inward (inner diameter side) to a predetermined angle using a caulking jig. Plastically deform. By this push-bending process, the roller (20) is guided and held so as to be pushed inward by the both side bulging portions (17), and the roller (20) is disposed in contact with the inner ring raceway (2a) and disposed at a normal position. Is done. In this state, at the four corners of the inner peripheral surface of the pocket hole (16), stealing portions are provided at the upper and lower positions of the both side bulging portions (17), and the rollers (20) are connected to the both side bulging portions (17). It is comprised so that it may be guide-held only by the inner surface.

  After assembling the inner ring (2), the assembly of the bearing is completed by assembling the outer ring on the outside of the cage (10) as in the conventional case.

  As described above, in the cage (10) of the present embodiment, the roller (20) is accommodated in the pocket hole (16) without plastically deforming the column portion (15), and the inner ring (2) is fitted. Therefore, the pocket hole can be prevented from being shortened due to the pushing and bending of the column portion, and the vertical dimension (length dimension) of the pocket hole (16) can be ensured to be sufficiently large in the initial state. Therefore, the roller (20) can be smoothly inserted and arranged in the pocket hole (16), and the roller insertion operation and, as a result, the bearing assembly operation can be performed easily and accurately.

  In addition, when the roller (20) is further inserted into the pocket hole (16), the roller (20) is disposed outside the normal position, and the inscribed inner diameter of the roller (20) is enlarged. Therefore, it is possible to fit the inner ring (2) into the cage (10) without any interference with the rollers (20).

  Further, in this embodiment, since the column portion (15) is not plastically deformed, the size of the pocket hole (16) does not change, and the size of the pocket hole (16) is pushed by the punch for forming the lower hole or the bulging portion on both sides. It can be managed by a bending punch, and the dimensional accuracy of the pocket hole (16) can be improved. For this reason, the dimension between the roller (20) and the pocket hole (16), in particular, the dimension between the roller end face and the upper and lower end portions of the pocket hole (16) can be maintained with high accuracy, and the bearing rotates. It is possible to prevent the rollers (20) from rattling in the vertical direction and to prevent generation of vibration and noise.

  Further, in the present embodiment, since the column portion (15) is not plastically deformed, it is possible to prevent deterioration of physical properties due to plastic working, and it is possible to improve the durability of the cage (10) and consequently the durability of the entire bearing. At the same time, the column portion can be prevented from being damaged by the column portion crimping punch, and good quality can be obtained.

  Moreover, in this embodiment, the bulging part (17) is formed in the both-sides edge part of the pocket hole (16), and the inner surface of the bulging part (17) is used for guiding and holding the roller (20). Since it is configured as a guide holding surface, the length of the guide holding surface, that is, the height (H) of the bulging portion (17) can be sufficiently secured, and the roller (20) is held in a stable state. be able to.

  Furthermore, in this embodiment, since the roller guide holding portion is formed by the bulging portions (17) on both side edges of the pocket hole, the roller guide is subjected to coining processing on both side surfaces of the column portion as in the prior art. Compared with the case where the holding portion is formed, the dimensional accuracy of the pocket hole or the like can be further increased.

  In other words, when coining is applied to the inner surface of the pocket hole, that is, both side surfaces of the pillar, the pillar is deformed due to movement of the meat by coining, and the pocket length and pocket width change, resulting in a decrease in dimensional accuracy. There is a fear.

  On the other hand, in the present embodiment, the roller guide holding portion is formed by the bent portions (both side bulging portions) at both side edges of the pocket hole without performing coining processing, so that there is no movement of meat. Further, deformation of the pocket hole peripheral portion can be prevented, and higher dimensional accuracy can be maintained.

  In the present embodiment, the roller guide holding portion is formed by the bulging portion (17), so that the guide holding portion is sufficiently large regardless of the thickness of the material constituting the cage (10). Can be secured. Accordingly, it is possible to reduce the thickness of the material, and accordingly, it is possible to reduce the weight of the entire cage. In addition, the weight reduction can reduce the rotational torque in the assembled state of the bearing, and it can obtain good rotation characteristics, and the impact load can be reduced by reducing the inertia force due to the weight reduction. It can also be suitably used for applications that greatly increase. Further, since a material having a thin plate thickness is used, the material cost is reduced, the press work can be easily performed with high accuracy, the production efficiency can be improved, and the cost can be further reduced.

  Furthermore, the cage of the present embodiment uses a steel plate such as a cold-rolled steel plate (SPCC) or a hot-rolled steel plate (SPHC) as a material, and there is no need to use a high-strength material such as a high carbon steel plate. For this reason, reduction of material cost and improvement of workability can be achieved more reliably.

  Here, the relationship between the plate thickness of this embodiment and the conventional one will be specifically described. In this embodiment, as shown in FIGS. 4 and 5, the large diameter dimension of the tapered roller (20) is “R”. "When the thickness of the cage (10) is" T ", T = 0.08R to 0.15R, preferably 0.10R to 0.13R. On the other hand, for reference, the conventional tapered roller bearing retainer is generally set to T = 0.16 to 0.25R. Thus, it is clear that the cage of the present embodiment is thinner than the conventional one.

  Further, in this embodiment, as shown in FIG. 3, when the length (vertical dimension) of the bulging portion (17) is “F” and the length (vertical dimension) of the pocket (16) is “L”. F = 0.6L to 0.8L, more preferably F = 0.65L to 0.75L. That is, when the length (F) of the bulging portion (17) is too short, the axial guide portion of the roller (20) becomes too short, and the roller (20) may not be held in a stable state. On the other hand, when the length (F) of the bulging portion (17) is too long, the contact position between the roller (20) and the bulging portion (17) is near the center in the axial direction (vertical direction). It will come apart and will come in contact at the position of the upper and lower ends, and the roller (20) may skew at the time of rolling, and it may not be possible to obtain good rotation characteristics. In addition, the space between the upper and lower end surfaces of the bulging portion (17) and the upper and lower end portions of the pocket hole is narrowed, and the strength of the die punch for punching between them is weakened. It can be difficult to form.

  Further, as shown in FIG. 4, when the protrusion amount (height) of the bulging portion (17) is “H” and the thickness of the cage (10) is “T”, H = 0.7T˜1. 5T, preferably H = 0.8T to 1.4T, more preferably H = 0.9T to 1.3T. That is, when the height (H) of the bulging portion (17) is too small, the flat length of the bulging portion (17) on the pocket inner peripheral surface side is shortened, and the roller (20) is sufficiently guided and held. Can be difficult. On the contrary, when the height (H) of the bulging portion (17) is too high, the die punch for punching out the pocket hole has an I-shape with a narrow middle portion, and the punch strength is There is a risk that it will become weak and it will be difficult to accurately form the pilot hole and thus the pocket hole.

  Moreover, in this embodiment, as shown in FIG. 4, the large diameter annular part (11) of a holder | retainer (10) is arrange | positioned outside the axial center (S) of a roller (20). Therefore, the bending angle (θ) to the outside of the bulging portions (17) on both sides can be suppressed to within 90 °, and bending can be easily performed.

  Further, the cage manufacturing method in the present embodiment uses burring instead of coining as compared to the conventional manufacturing method, and therefore maintains high productivity without increasing the number of pressing steps. be able to.

It is a perspective view which shows the retainer for tapered roller bearings which is embodiment of this invention. It is a perspective view which expands and shows the pocket hole periphery in the holder | retainer of embodiment. It is side surface sectional drawing which shows the one-side half part in the holder | retainer of embodiment. It is a horizontal sectional view expanding and showing the pocket hole circumference in the cage of an embodiment. It is side surface sectional drawing shown in the state before accommodating a roller and crimping a both-sides bulging part in the holder | retainer of embodiment. It is side surface sectional drawing of the one-side half part shown in the state after inserting the inner ring | wheel in the holder | retainer of embodiment and crimping a both-sides bulging part. It is sectional drawing which shows the one side half part of the conventional tapered roller bearing. It is a perspective view which shows the conventional retainer for tapered roller bearings. It is side surface sectional drawing of the one-side half part which shows the state in the middle of driving in the bottom expansion punch in the conventional holder | retainer. It is side surface sectional drawing of the one-side half part which shows the state immediately after driving in the bottom extension punch in the conventional holder | retainer. It is side surface sectional drawing of the one-side half part which shows the state in the middle of fitting the inner ring | wheel in the conventional holder | retainer. It is side surface sectional drawing of the one-side half part which shows the state in the middle of crimping a pillar part in the conventional holder | retainer. It is side surface sectional drawing of the one-side half part which shows the state immediately after crimping a pillar part in the conventional cage | basket.

Explanation of symbols

2 ... Inner ring 10 ... Cage 16 ... Pocket hole 17 ... Both sides bulging part (curved part)
20 ...

Claims (4)

An annular tapered roller bearing retainer that is arranged between the inner ring and the outer ring of the bearing, and in which a plurality of pocket holes for accommodating the tapered rollers are formed at intervals in the circumferential direction,
A tapered roller bearing characterized in that both side bulges of the pocket hole are provided with bulges on both sides protruding in the outer diameter direction, and the rollers are guided and held by the bulges on both sides. Retainer.   The retainer for a tapered roller bearing according to claim 1, wherein the bulging portions on both sides are formed by bent portions provided on both side edges of the pocket hole.   The upper and lower ends of the bulging portions on both sides are arranged vertically apart from the upper and lower ends of the pocket hole when one side in the axial direction is the upper side and the other side is the lower side. The tapered roller bearing retainer according to 1 or 2. An annular cage in which a plurality of pocket holes in which tapered rollers are accommodated is formed at intervals in the circumferential direction, and both side bulge portions that protrude in the outer diameter direction are provided at both side edges of the pocket holes. Prepare,
The roller is accommodated in the pocket hole of the cage from the inner peripheral side, and the inner ring of the bearing is fitted into the cage,
A method of assembling a tapered roller bearing in which the both bulged portions are crimped inward in the fitted state so that the rollers are brought into contact with the inner ring while being guided and held by the bulged portions on both sides.

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