JP2010112473A - Roller bearing cage, roller bearing equipped therewith, and method of manufacturing the roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce torque of a roller bearing by reducing sliding resistance developed between a cage and each of rollers. <P>SOLUTION: The cage 7 includes pockets 74 for holding the plurality of tapered rollers 6 slidably arranged between a raceway surface 4 provided on the outer periphery of an inner ring 2 and the raceway surface 5 provided on the inner periphery of an outer ring 3, and a first flange portion 76 projected from the small-diameter side of the pockets 74 to the inner-diameter side. On a roller side end face 76a of the first flange portion 76, projections 11 are formed to be fitted to recesses 12 provided in the centers of small-diameter side end faces 62 of the tapered rollers 6 opposing each other. The projections 11 are fitted to the recesses 12 to form an end face guide structure 10 between the cage 7 and each of the tapered rollers 6. The guide structure guides the cage 7 at the centers of the small-diameter side end faces 62 of the tapered rollers 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cage for a roller bearing, a roller bearing provided with the cage, and a method for manufacturing the roller bearing.

  Conventionally, a roller bearing such as a tapered roller is suitably used in a railway vehicle drive device or the like in order to ensure required durability and reliability.

  In this type of bearing, rolling resistance generated between the roller and the inner ring raceway surface or between the roller and the outer ring raceway surface leads to an increase in rotational torque. In order to reduce the torque, it is important to suppress rolling resistance, but as the demand for lower torque on roller bearings in recent years increases, the surface roughness of the inner and outer ring raceways and roller outer peripheral surface is improved. It has reached a situation where it is not possible to cope with only the measures to be taken. In other words, it is required to reduce the rotational torque to a level at which the sliding resistance between the roller and the cage (for example, sliding friction generated between the roller end face and the inner ring large collar surface) cannot be ignored.

For example, in Patent Document 1 below, for the purpose of reducing sliding frictional resistance between the cage and other components, the cage has an inner ring raceway surface, a small collar outer circumferential surface, or an outer ring raceway in the vicinity of the small end of the tapered roller. Tapered roller bearings configured to be guided by a surface have been proposed.
JP 2004-293730 A

  However, the roller bearing proposed in Patent Document 1 is provided with a sliding region between the cage and the inner ring or between the cage and the outer ring. It is only relaxed indirectly. Thus, at present, no drastic measures for improving the sliding resistance between the most problematic cages have been shown yet.

  In view of the above circumstances, in the present specification, it is a technical problem to be solved by the present invention to reduce the torque of a roller bearing by reducing the sliding resistance generated between the cage and the cage.

  The solution to the above problem is achieved by the roller bearing retainer according to the present invention. In other words, this cage is a roller bearing for holding a plurality of rollers that are rotatably arranged between a raceway surface provided on the outer periphery of the inner ring and a raceway surface provided on the inner periphery of the outer ring. The cage is characterized in that it is guided at the end face of the roller and is guided at this end face at the center of the end face.

  According to the above configuration, since the roller comes into contact with the cage at the center of the end face, the peripheral speed of the roller with respect to the cage can be brought close to zero. Thereby, the sliding resistance which arises in a cage | basket can be made small, and the rotational torque of a roller bearing can be restrained small. In addition, since the cage is guided at the rotation center of the roller, the position and posture when the roller rotates with respect to the cage can be stabilized. Therefore, it is possible to minimize the rotational torque of the roller bearing by avoiding the situation where the roller receives vibration or the like and hits the retainer more than necessary, or slidably contacts the retainer at a place other than the predetermined place.

  In this case, guidance at the end face may be performed by point contact with the end face of the roller. If the cage is brought into point contact at the center of the end face of the roller, the peripheral speed of the roller with respect to the cage can be reduced to zero as much as possible, and the sliding resistance generated in the cage can be further reduced.

  In addition, the cage according to the present invention may be provided with a flange portion that protrudes toward the inner diameter side or the outer diameter side, so that guidance at the end face is performed between the flange portion and the cage portion. For example, when giving priority to increasing the load capacity of roller bearings as much as possible, it does not matter whether pockets are provided in the cage (whether or not it surrounds the four sides of the rollers. Including those that are open in a comb shape) The same shall apply hereinafter.) In order to increase the number of rollers accommodated as much as possible, it is preferable to provide a flange portion that protrudes toward the inner diameter side, and to perform guidance at the center of the end surface between the flange portion. . If priority is given to reducing the sliding resistance between the side surface of the pocket provided in the cage and the outer peripheral surface of the roller accommodated in this pocket as much as possible, the outer It is preferable to provide a flange portion projecting on the radial side so that guidance at the center of the end surface is performed between the flange portion and the flange portion.

  Further, in addition to the guidance at the roller end face, the cage may be guided at the outer peripheral face of the roller. Since the cage according to the present invention adopts a structure that is guided at the center of the end face of the roller, the rotational posture (rolling posture) of the roller is stabilized. Therefore, for example, even when the cage is configured to be guided by the outer peripheral surface of the roller on the side surface of the pocket, the sliding resistance with the outer peripheral surface at the side surface of the pocket can be reduced. Of course, by guiding the outer peripheral surface of the roller in addition to the end surface of the roller, the rotational posture of the roller and its position (axial direction and bearing radial direction) can be further stabilized.

  Or the pocket which accommodates a roller may be provided, and a predetermined clearance may be formed between the outer peripheral surface of the side surface part of a pocket at the time of rolling of a roller. If comprised in this way, it is not necessary to always contact the outer peripheral surface of a roller and a holder | retainer at the time of rolling of a roller. Therefore, the sliding area with the cage can be concentrated at the center of the end face of the roller, and the sliding area can be greatly reduced. Further, if the sliding area is concentrated at the center of the end face of the roller, the sliding resistance can be reduced, so that the torque can be further reduced.

  Thus, in order to fully exhibit the guide function at the roller end face, it is important that the cage and the end face have a corresponding shape and that the corresponding parts are guided by sliding contact with each other. Become. In this respect, for example, a concave / convex fitting may be formed between the roller end face and the roller end face may be guided by the concave / convex fitting. According to this configuration, the guide is performed while maintaining the state in which the roller is held at the center of the end face, so that the roller does not deviate from the end face center even if subjected to vibration. Therefore, the position or rotational posture of the roller with respect to the cage can be further stabilized.

  In this case, a convex portion may be provided on the side of the cage, and guidance on the end surface may be performed between the convex portion and the end surface. Alternatively, a convex portion may be provided on the roller end surface side, and guidance on the end surface may be performed between the end surface and the opposite surface.

  When providing a convex part on the cage side, the convex part may be made of metal and formed by plastic working, for example. This is because although the load is not directly received from the inner ring or the outer ring, a certain degree of strength and rigidity is required for the convex portion depending on the application as long as the load is indirectly received through the roller. Further, if the convex portion is formed by plastic working, for example, the convex portion can be formed even after the roller is incorporated into the cage, so that the degree of freedom of incorporation of the roller or incorporation into the inner ring is increased. Rise.

  Further, the convex portion may be formed of resin, for example. For example, as described above, in the case of adopting a configuration that avoids sliding contact between the outer peripheral surface of the roller and the side surface of the pocket, how to reduce the sliding friction between the convex portion and the end surface (or the concave portion provided on the roller end surface). It becomes important. In this regard, if the cage body is made of metal and the projection is made of resin, a material that keeps the sliding friction with the roller end face low is used for the projection regardless of the strength and rigidity required of the cage body. And the sliding resistance can be reduced. Of course, if the strength and rigidity can be ensured by devising the composition of the resin, the entire cage including the convex portion may be molded from the resin.

  When the roller is a tapered roller, the guidance on the roller end surface according to the above description may be performed on the small-diameter side end surface and the large-diameter side end surface of the roller, respectively. In this way, by adopting the end face center guide structure on both the small diameter side and large diameter side end faces of the roller, the posture or behavior can be further stabilized regardless of the axial position of the roller, and the Torque can be achieved.

  The cage having the above-described configuration can be provided as a roller cage integrated product including a plurality of rollers held by the cage by enabling the guide at the end face of the roller. In this way, the cage after roller assembly can be handled very easily and simply, and for example, inspection or the like involving incorporation into the inner ring or disassembly can be performed smoothly. Of course, it is easier to manage if it is an integrated product.

  Since the cage according to the above description can stably hold the roller and can reduce the sliding resistance with the roller, it can be suitably used for a roller bearing, particularly a roller bearing for a use requiring high torque reduction. be able to.

  Further, the solution to the above-mentioned problem is to produce a roller bearing according to the present invention described below, that is, between the raceway surface provided on the outer periphery of the inner ring and the raceway surface provided on the inner periphery of the outer ring. A plurality of freely arranged rollers and a cage for holding the rollers in a pocket, the holding being guided by the end face of the roller and guiding at the end face being performed at the center of the end face A method of manufacturing a roller bearing provided with a cage, wherein the roller is accommodated in a pocket of the cage, and then a part of the cage is plastically deformed to allow guidance at an end face. Is also achieved.

  According to the above method, the cage can be guided in a state where the posture or behavior of the roller is stabilized, and the rotational torque is reduced by reducing the sliding resistance generated between the roller and the cage. A roller bearing can be provided. In addition, since the roller was partly inserted into the cage and then a part of the cage was plastically deformed so that it could be guided at the end surface, the center of the end surface on the side of the cage was adjusted to the size of each roller. A guide structure can be formed. As a result, even when the roller dimensions (for example, axial dimensions) vary, all the roller end face guide structures can be formed with high accuracy while suppressing the variation.

  Further, the solution of the above-mentioned problem is to provide a roller bearing manufacturing method according to the present invention described below, that is, between the raceway surface provided on the outer periphery of the inner ring and the raceway surface provided on the inner periphery of the outer ring. A plurality of rollers arranged in a freely rollable manner and a cage for holding the rollers in pockets so that the rollers are guided at the end face of the roller and the guide at the end face is performed at the center of the end face. A roller bearing provided with a cage, wherein one of a concave portion and a convex portion, which can be guided at the end face by fitting together, is provided on the cage, and the other is provided on the end face of the roller. It is also achieved by a method for manufacturing a roller bearing in which the convex portion and the concave portion are fitted together by accommodating the roller in the pocket of the cage.

  Also with the above method, the roller can be guided in a state where the posture or behavior of the roller is stabilized, and the rotational torque is reduced by reducing the sliding resistance generated between the roller and the cage. A bearing can be provided. In the above method, for example, in a method in which a roller is first assembled in a cage and then a part thereof is plastically deformed, it is difficult to obtain plastic processing accuracy due to the material of the cage, and the plastically deformed portion of the cage is placed on the end surface of the roller. This is effective when it is assumed that the roller cannot be properly rotated with respect to the cage (or receives excessive sliding resistance) due to excessively strong pressing. That is, if the convex and concave portions are formed in advance, and the end face guide structure is formed by fitting the concave and convex portions at the same time when the rollers are assembled, the concave and convex portions are more easily obtained than when plastic processing is performed. Accuracy can be ensured.

  Even when any of the above methods is employed, a method can be employed in which a roller is assembled and a cage that can be guided on its end face is fitted into the inner ring. It is suitable in terms of ease of incorporation into the inner ring.

  Normally, a flange portion is formed at each of the small-diameter end and the large-diameter end of the inner ring raceway surface. However, if the above method is employed, the flange portion is provided only between the raceway surface and the large-diameter side end surface. It is enough if you do. That is, as in the above method, the roller and the cage can be integrated by incorporating the roller into the cage so that it can be guided by the end face of the roller, so the cage is temporarily installed from the small diameter side of the inner ring at the stage of incorporation into the inner ring. Even if it comes off, it is possible to reliably avoid the situation where the roller falls off the cage at that time. Further, in the tapered roller bearing, the tapered roller is pressed against the flange on the large diameter side in response to the resultant force from the outer ring and the inner ring. From the above points, there is no problem even if the collar portion is not provided on the small diameter side of the inner ring.

  According to the present invention, it is possible to reduce the torque of the roller bearing by reducing the sliding resistance generated between the cage and the cage.

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

  FIG. 1 shows a cross-sectional view of a roller bearing 1 according to an embodiment of the present invention. The roller bearing 1 is a so-called tapered roller bearing, and includes an inner ring 2, an outer ring 3, a tapered raceway surface 4 provided on the outer periphery of the inner ring 2, and a tapered shape provided on the inner periphery of the outer ring 3. A raceway surface 5, a plurality of tapered rollers 6 disposed between the raceway surfaces 4 and 5 so as to roll freely, and a retainer 7 that holds the plurality of tapered rollers 6 at predetermined intervals in the circumferential direction. And mainly. In this embodiment, a small flange portion 8 that protrudes radially outward is formed on the small diameter side of the raceway surface 4 of the inner ring 2, and a large flange that also protrudes radially outward on the large diameter side of the track surface 4. Part 9 is formed. Here, the tapered corners of the tapered roller 6 and the raceway surface 4 of the inner ring 2 and the raceway surface 5 of the outer ring 3 coincide with each other at one point on the center line of the tapered roller bearing 1. Can roll along the raceway surfaces 4 and 5.

  The cage 7 is made of, for example, metal, and as shown in FIG. 2, a small-diameter ring portion 71, a large-diameter ring portion 72 having a larger diameter than the small-diameter ring portion 71, and a small-diameter ring portion 71 extending substantially in the axial direction. A plurality of pillars 73 that connect the large-diameter ring part 72 are provided. Further, a pocket 74 for accommodating and holding the tapered roller 6 is formed between the column portions 73 and 73 adjacent in the circumferential direction.

  The small diameter ring portion 71 includes a column portion 73 and an inner short cylindrical portion 75 connected at the small diameter end thereof, and a first flange portion 76 extending radially inward from the inner diameter edge of the inner short cylindrical portion 75. The large-diameter ring portion 72 includes a columnar portion 73 and an outer short cylindrical portion 77 connected at its large-diameter end, and a second flange portion 78 extending radially inward from the outer diameter edge of the outer short cylindrical portion 77. In this case, the pocket 74 is defined by the side surfaces 73a and 73a facing each other in the circumferential direction and the end surfaces 75a and 77a facing each other between the inner short tube portion 75 and the outer short tube portion 77. Yes. Here, the pocket 74 is partitioned so as to form a substantially trapezoidal shape when viewed from the outside in the radial direction.

  In addition, the circumferential dimension of the pocket 74 (the facing distance between the side surfaces 73a and 73a) is set smaller than the outer diameter dimension of the tapered roller 6 in this embodiment. In this case, as shown in FIG. 3, the side surfaces 73a and 73a of the pocket 74 are in sliding contact with the outer peripheral surface 61 of the tapered roller 6 at a position shifted from the center position of the tapered roller 6 by a predetermined distance radially outward. The cage 7 is guided by the outer peripheral surface 61 of the tapered roller 6. In this embodiment, a part of the side surfaces 73a and 73a of the pillars 73 and 73 is formed in a shape that expands as the facing distance between the side surfaces 73a and 73a increases inward in the radial direction, and is in sliding contact with the outer peripheral surface 61 of the tapered roller 6. The area is secured (see FIG. 3).

  Similarly, the facing distance between the end surface 75 a of the inner short cylinder part 75 and the end surface 77 a of the outer short cylinder part 77 that defines the pocket 74 is set larger than the axial dimension of the tapered roller 6. Therefore, in a state where the cage 7 is guided to the tapered roller 6 that is rolling by at least an end surface guide structure 10 to be described later, both the end surfaces 75a and 77a and the both end surfaces 62 and 63 of the tapered roller 6 do not contact each other. It is like that.

  Between the first flange portion 76 on the small diameter side forming a part of the cage 7 and the small diameter side end surface 62 of the tapered roller 6 facing the flange portion 76 in the axial direction of the tapered roller 6, the tapered roller 6 is provided. An end surface guide structure 10 for guiding the cage 7 at the center of the end surface is formed. With this end face guide structure 10, the cage 7 is guided at the center of the small diameter side end face 62 of the tapered roller 6. In this embodiment, among the convex portion 11 and the concave portion 12 that can be fitted to each other, the convex portion 11 is formed on the roller side end surface 76a of the first flange portion 76, and the concave portion 12 faces the roller side end surface 76a. The small-diameter side end face 62 is formed. Therefore, the end face guide structure 10 is formed between the tapered roller 6 and the cage 7 by fitting the convex portion 11 and the concave portion 12 to each other. At this time, when the concave portion 12 is formed at the center position of the small-diameter side end surface 62 so that the cage 7 is guided at the center of the end surface of the tapered roller 6, the tapered roller 6 is accommodated in the pocket 74 of the cage 7. The convex portion 11 is formed at a predetermined position on the roller side end surface 76 a of the first flange portion 76 so as to face the concave portion 12. For example, the convex portion 11 and the concave portion 12 both have a partially spherical convex surface and a concave surface, and are fitted so that their center axes coincide with each other.

  In the illustrated example, the convex portion 11 is on the roller side of the first flange portion 76 so that the end surface guide structure 10 is formed between all the tapered rollers 6 held by the cage 7 and the cage 7. The end surface 76 a is formed at a circumferential position corresponding to each pocket 74, and the recess 12 is formed on the small diameter side end surface 62 of each tapered roller 6. Further, the convex portion 11 is positioned in the circumferential direction corresponding to each pocket 74 on the roller side end surface 78a of the second flange portion 78 so that the end surface guide structure 10 is formed also on the large diameter side end surface 63 of the tapered roller 6. The recess 12 is formed on the large-diameter side end face 63 of each tapered roller 6. In this case, the distance (opposite spacing) between the opposing convex portions 11 and 11 is set to be smaller than the separation distance between the both end surfaces 62 and 63 of the tapered roller 6, and the concave portions 12 and 63 formed on the end surfaces 62 and 63, respectively. It is set to be larger than the minimum distance between 12 (the distance between the bottoms).

  The roller bearing 1 having the above-described configuration includes, for example, (A) a step of forming a cage 7 having a convex portion 11 and a tapered roller 6 having a concave portion 12, and (B) a step of incorporating the tapered roller 6 into the cage 7 integrally. C) The cage 7 (subassembly) in which the tapered rollers 6 are integrated is fitted into the inner ring 2 and the outer ring 3 is assembled.

  In the step (A), the cage 7 having the shape shown in FIG. 2 can be formed, for example, by punching (pressing) or punching (shaving). Or it can also form by the method which combined both 1 or 2 times or more. As shown in FIGS. 1 and 2, in this embodiment, the convex portions 11 are provided on the roller side end surfaces 76a and 78a facing each other of the flange portions 76 and 78, respectively, and the rear surface of the convex portion 11 is provided. A concave portion 13 formed corresponding to the plastic working of the convex portion 11 is formed. If the concave portion 13 is formed in accordance with the position of the convex portion 11 as described above, the thickness of the flange portions 76 and 78 including the convex portion 11 can be kept as uniform as possible as shown in FIG. Therefore, stress concentration around the convex portion 11 can be relaxed.

  In step (B), the convex portion 11 provided on the cage 7 side and the concave portion 12 provided on the tapered roller 6 side are fitted together, and the tapered roller 6 is fitted into each pocket 74 of the cage 7. As a result, the tapered roller 6 is integrated into the cage 7, and the end surface guide structures 10, 10 are formed between the flange portions 76, 78 of the cage 7 and both end surfaces 62, 63 of the tapered roller 6. Is done. As described above, if the end face guide structure 10 is formed by fitting the convex portion 11 and the concave portion 12, the tapered side surface 73 a, 73 a and the outer peripheral surface 61 of the tapered roller 6 are not particularly contacted. Positioning of the roller 6 with respect to the cage 7 can be performed automatically and accurately. The direction in which the tapered roller 6 is fitted is arbitrary, but it is preferable that the tapered roller 6 is fitted from the outer diameter side of the pocket 74 in order to avoid unnecessary interference with the flange portions 76 and 78.

  In the step (C), the cage 7 in which the tapered rollers 6 are integrated is fitted into the outer periphery of the inner ring 2. At this time, an integrated product of the tapered roller 6 and the cage 7 is fitted into the inner ring 2 from the small diameter side so as to get over the small flange portion 8 of the inner ring 2. At this time, the small diameter side of the cage 7 is slightly expanded (deformed in the direction to expand the diameter), and is fitted onto the raceway surface 4 of the inner ring 2 integrally with the tapered roller 6. It is also possible to fit the convex portion 11 and the concave portion 12 by returning the cage 7 to its original shape. Alternatively, if the end face guide structure 10 is formed by concave-convex fitting as in this embodiment, the tapered roller 6 is not likely to fall out of the pocket 74 even if the retainer 7 is detached from the inner ring 2. An integral product of the tapered roller 6 and the cage 7 may be fitted into the inner ring 2 provided with only the flange portion 9 and without the small flange portion 8.

  In the case of the roller bearing 1 having the above-described configuration, the cage 7 is guided at the center of the end surface of the tapered roller 6 by the end surface guide structure 10 formed by the convex portion 11 and the concave portion 12. When incorporated and used, even if it receives vibrations of the motor of the drive source or vibrations associated with traveling, the tapered rollers 6 can be prevented from being displaced from the guide position, and rolling can be performed in a stable posture. Further, since the cage 7 is guided by both end faces 62 and 63 of the tapered roller 6 and also by the outer peripheral surface 61, the posture of the tapered roller 6 can be further stabilized.

  As mentioned above, although one embodiment of the present invention has been described, the scope of the present invention should not be construed as being limited to the embodiment of course, and all that guide at the roller end face is performed at the center of the end face. It goes without saying. Hereinafter, examples of other embodiments will be described.

  FIG. 4 shows a roller bearing 1 according to another embodiment of the present invention. The roller bearing 1 in the figure is different from the roller bearing 1 according to the above-described embodiment in a convex portion 14 provided on the cage 7 side. That is, the convex portion 14 in this embodiment is formed by bending a part of the first flange portion 76 of the cage 7, and the tip of the bent portion serves as the convex portion 14 of the small diameter side end surface 62 of the tapered roller 6. It fits into the recess 12 provided in the center. Thereby, the end surface guide structure 10 is formed by the convex portion 14 and the concave portion 12, and the cage 7 is guided at the center of the end surface of the tapered roller 6, as shown in FIG. In this embodiment, as shown in FIG. 4, the inner diameter side end portions of the flange portions 76 and 78 are rounded for the purpose of making the tip of the convex portion 14 slidably contact with the concave portion 12 as much as possible (the cross-sectional contour thereof is (Partial spherical shape). In this embodiment as well, the facing distance between the end surface 75a of the inner short cylindrical portion 75 and the end surface 77a of the outer short cylindrical portion 77 that defines the pocket 74 is set larger than the axial dimension of the tapered roller 6. The end faces 62 and 63 of the tapered roller 6 are not in contact with each other.

  Further, in the above embodiment, the side surfaces 73a and 73a of the column portions 73 and 73 that define the pocket 74 are brought into sliding contact with the outer peripheral surface 61 of the tapered roller 6, but it is not always necessary to make sliding contact. As shown in FIGS. 1 and 4, if the end face guide structure 10 is formed by uneven fitting, and if the end face guide structure is formed by both end faces 62, 63 of the tapered roller 6, In particular, it is possible to stably guide the tapered roller 6 without bringing the side surface 73a and the outer peripheral surface 61 into sliding contact and guiding the retainer 7 by the outer peripheral surface 61 of the tapered roller 6.

  FIG. 6 shows an example thereof. A cage 7 according to FIG. 6 holds the tapered roller 6 at a predetermined position by fitting the convex portion 11 and the concave portion 12 of the roller bearing 1 shown in FIG. Guided by the end faces 62 and 63 of the tapered roller 6. In this state, both of the side surfaces 73b and 73b of the pillar portion 73 that defines the pocket 74 have a shape in which the facing distance between the side surfaces 73b and 73b is constant along the radial direction (so-called cross-sectional contour straight shape). In addition, when the cage 7 is guided by the both end surfaces 62 and 63 of the tapered roller 6 that is rolling by the end surface guide structure 10, a predetermined clearance is always formed between the outer surface 61 of the tapered roller 6. It is like that. Thereby, the tapered roller 6 guides the cage 7 only on the end surfaces 62 and 63 thereof without contacting the section screen (side surfaces 73b and 73b) of the pocket 74.

  FIG. 7 shows another example. The cage 7 according to FIG. 7 holds the tapered roller 6 at a predetermined position by fitting the convex portion 14 and the concave portion 12 of the roller bearing 1 shown in FIG. The end faces 62 and 63 of the tapered roller 6 are guided. In this state, the side surfaces 73b and 73b of the column portions 73 and 73 both have the same cross-sectional shape as described above, and the cage 7 is guided at the center of the end surface of the tapered roller 6 that is rolling. Then, a predetermined clearance is always formed between the outer peripheral surface 61 of the tapered roller 6. Therefore. The tapered roller 6 guides the cage 7 only on the end surfaces 62 and 63 thereof without contacting the side surfaces 73b and 73b serving as the section screen of the pocket 74.

  As described above, if the guide by the tapered roller 6 on the section screen (side surfaces 73a, 73a) of the pocket 74 is eliminated and the guide is provided only at the center of the end face, Although it is necessary to provide the end surface guide structure 10 between them, it is not always necessary to guide the cage 7 at the center of the end surfaces of all the tapered rollers 6. For example, a configuration in which the cage 7 is guided only at the center of the end face for some of the tapered rollers 6 and the cage 7 is guided only on the outer peripheral surface 61 of the remaining tapered rollers 6 may be employed.

  Moreover, in the said embodiment, although the flange parts 76 and 78 were provided in the holder | retainer 7, and the case where the convex parts 11 and 11 were provided in the surface opposite to the roller end surface of these flange parts 76 and 78 was illustrated, it does not restrict to this. For example, a convex portion 11 is provided on each of the end surface 75a of the inner short cylindrical portion 75 and the end surface 77a of the outer short cylindrical portion 77 that define the pocket 74 of the cage 7, and the convex portion 11 is provided between the tapered roller 6 and the convex portion 11. The end surface guide structure 10 may be formed. At this time, the concave portion 12 is not essential on the tapered roller 6 side, and the convex portion 11 may be slidably contacted with the centers of the flat end surfaces 62 and 63 to guide the cage 7.

  In the above description, the cage is guided at the center of the small-diameter side end face 62 and the center of the large-diameter side end face 63 of the tapered roller 6, but only one of the end faces. You may take the structure to guide.

  Moreover, regarding the manufacturing method of the cage 7, in the above-described embodiment, the method of manufacturing the cage 7 having the convex portions 11 and 14 by punching (pressing) or milling (cutting out) a metal is exemplified. It can also be formed by other methods. For example, although not shown in the drawings, a retainer 7 in which the opposite roller side end surfaces 76a and 78a of the flange portions 76 and 78 are both flat is formed, and after the tapered roller 6 is accommodated therein, the tapered roller 6 Convex portions 11 for guiding the cage 7 at the centers of the end surfaces 62 and 63 of the tapered roller 6 by applying plastic deformation to the positions corresponding to the centers of the end surfaces 62 and 63 (by applying plastic working). A method of forming 14 may also be adopted.

  Further, regarding the material of the cage 7, a material such as a resin can be used in addition to the metal. In this case, the cage 7 is formed by resin injection molding, and the convex portion 15 is also formed by resin injection molding integrally with the main body of the cage 7. FIG. 8 shows an example of this, and convex portions 11 and 11 are formed on a small-diameter ring portion 71 and a large-diameter ring portion 72 constituting the cage 7, respectively. Here, the convex portion 11 on the side fitting with the small diameter side end surface 62 is formed on the radially outer side of the small diameter ring portion 71, and the convex portion 11 on the side fitting with the large diameter side end surface 63 is formed on the large diameter ring portion 72. It is formed radially inward. In addition to this, it is also possible to adopt a method in which the main body of the cage 7 is formed of metal, and the convex portion 15 is insert-molded with resin using the metal cage 7 main body as an insert part. In this case, the main body of the cage 7 is made of metal, and the convex portion 15 formed integrally with the main body is made of resin. In any case, if it is made of resin, the convex portion 15 or the entire cage 7 including the convex portion 15 can be formed by molding, so that the convex portions 11 and 14 are formed by metal plastic processing or cutting. The shape can be designed freely as compared with the case of doing so.

  Moreover, although the case where the convex part 11 is provided at least on the side of the cage 7 is illustrated in the above description, it is needless to say that a configuration opposite to these examples can be adopted. That is, as long as the end surface guide structure 10 is formed between the cage 7 and at least one end surface of the tapered roller 6, the configuration thereof is arbitrary. For example, the convex surface protrudes toward the tapered roller 6 side (end surfaces 62, 63). It is also possible to provide the portion 11 and provide the recess 12 on the side of the cage 7 (for example, the roller side end surfaces 76a and 78a of the flange portions 76 and 78).

  Further, in the above description, the case where the present invention is applied to the roller bearing (so-called tapered roller bearing) 1 provided with the tapered roller 6 has been described, but other types such as a normal roller bearing provided with a cylindrical roller according to the present invention. Of course, it can be applied to other roller bearings.

A cross-sectional view of a roller bearing according to an embodiment of the present invention, a B ₁ -B ₁ sectional view of a roller bearing shown in FIG. It is a fragmentary perspective view of the holder | retainer which comprises the roller bearing shown in FIG. It is A ₁ -A ₁ section view of a roller bearing shown in FIG. A cross-sectional view of a roller bearing according to another embodiment of the present invention, a B ₂ -B ₂ sectional view of a roller bearing shown in FIG. It is A ₂ -A ₂ cross-sectional view of a roller bearing shown in FIG. A further cross-sectional view of a roller bearing according to an embodiment of the present invention, an A ₁ -A ₁ section view of a roller bearing shown in FIG. A cross-sectional view of a roller bearing according to another embodiment of the present invention, an A ₂ -A ₂ cross-sectional view of a roller bearing shown in FIG. It is sectional drawing of the roller bearing which concerns on other embodiment of this invention, Comprising: It is sectional drawing orthogonal to the centerline of a bearing.

Explanation of symbols

1 Roller bearing 2 Inner ring 3 Outer ring 4 Raceway surface (inner ring)
5 Track surface (outer ring)
6 Tapered roller 7 Cage 10 End face guide structure 11, 14, 15 Convex part 12 Concave part 61 Outer peripheral face 62 Small diameter side end face 63 Large diameter side end face 73a, 73b Side face 74 Pocket 76, 78 Flange part 76a, 78a Roller side end face

Claims (13)

In a roller bearing retainer for holding a plurality of rollers rotatably arranged between a raceway surface provided on the outer periphery of the inner ring and a raceway surface provided on the inner periphery of the outer ring,
A roller bearing retainer characterized by being guided at an end face of the roller and being guided at the center of the end face.   The roller bearing retainer according to claim 1, wherein a flange portion that protrudes toward an inner diameter side or an outer diameter side is provided, and guidance at the end face is performed between the flange portion and the roller.   The roller bearing retainer according to claim 1 or 2, wherein, in addition to the guide at the end surface, the guide is also guided at the outer peripheral surface of the roller.   The roller bearing according to claim 1 or 2, wherein a pocket for accommodating the roller is provided, and a predetermined clearance is formed between a side surface of the pocket and an outer peripheral surface of the roller when the roller rolls. Retainer.   The roller bearing retainer according to any one of claims 1 to 4, wherein a concave-convex fitting is formed with an end surface of the roller, and the guide is performed on the end surface by the concave-convex fitting.   The roller bearing retainer according to any one of claims 1 to 5, wherein a convex portion is provided, and guidance at the end face is performed between the convex portion and the roller.   The roller bearing retainer according to claim 6, wherein the convex portion is made of metal and formed by plastic working.   The roller bearing cage according to claim 6, wherein the convex portion or the entire cage including the convex portion is formed of a resin.   The roller bearing retainer according to any one of claims 1 to 8, wherein the guide at the end face is performed on the end face on the small diameter side and the end face on the large diameter side of the roller.   A roller cage integrated product comprising the cage according to any one of claims 1 to 9 and a plurality of the rollers held by the cage by enabling guidance at the end face.   A roller bearing comprising the retainer according to any one of claims 1 to 9 or the integrated product according to claim 10, an inner ring, and an outer ring. A plurality of rollers arranged to roll between a raceway surface provided on the outer periphery of the inner ring and a raceway surface provided on the inner periphery of the outer ring, and a cage for holding the rollers in a pocket. A roller bearing manufacturing method comprising: a cage guided by an end face of the roller, and a cage that is guided at the center of the end face;
A method for manufacturing a roller bearing, in which after the roller is accommodated in a pocket of the cage, a part of the cage is plastically deformed to allow guidance on the end face. A plurality of rollers arranged to roll between a raceway surface provided on the outer periphery of the inner ring and a raceway surface provided on the inner periphery of the outer ring, and a cage for holding the rollers in a pocket. A roller bearing manufacturing method comprising: a cage guided by an end face of the roller, and a cage that is guided at the center of the end face;
One of the concave and convex portions that can be guided on the end face by fitting together is provided in the cage, the other is provided on the end face of the roller,
A method of manufacturing a roller bearing in which the convex portion and the concave portion are fitted together by accommodating the roller in a pocket of the cage.

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