JP2006132623A - Cage for roller bearing and roller bearing provided with cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily assemble a cage holding a roller on an inner ring having outward facing collars on both sides. <P>SOLUTION: When assembling the cage 30 holding a needle-like roller 40 by crossing the outward facing collar 22 of the inner ring 20, a roller clamping part 35 is formed on an outside diameter side of inner side faces 34a, 34a of a window hole 34 of the cage 30 and a channel 36 for allowing elastic deformation and restoration in the radial direction of the roller clamping part 35 is formed on an outside diameter face of at least a column part 33. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a roller bearing retainer that rotatably holds a plurality of rollers on the outer diameter side of an inner ring, and a roller bearing provided with the roller bearing retainer.

In some conventional roller bearings, a cage having an inner diameter larger than the outer diameter of the outward flange is mounted on an inner ring having outward flanges on both sides (see Patent Document 1). In this roller bearing, the roller is assembled into the roller holding window hole from the outer diameter side of the cage, or the roller is assembled into the cage in advance to form an integral assembly, and this assembly is assembled into the inner ring. Become.
Patent-0321813 (FIG. 6)

  In either case, it is difficult to incorporate the roller into the window hole of the cage from the outer diameter side, the assembly property is inferior, and there is room for improvement in mass productivity.

  A roller bearing retainer according to the present invention is a roller bearing retainer that is incorporated in an inner ring so as to climb over its outer flange while holding the roller, and at least both inner surfaces of the window hole on the outer diameter surface of the column portion. The roller stopper provided on the groove is provided with a concave groove that allows the roller to be elastically deformed by pressing in the outer diameter direction by the roller. The roller can be moved in the outer diameter direction by abutting with the outward flange when the rider goes over.

  According to the present invention, when a roller is attached to a window hole of a cage to form a cage structure and the assembly is assembled into an inner ring having outward flanges on both sides, the rollers are arranged in the outer diameter direction. When pressed, the concave groove allows the roller stopper to be elastically deformed in the outer diameter direction by the pressing. As a result, the inscribed circle diameter of the roller can be made equal to or larger than the outer diameter of the outer ring of the inner ring, and the assembly can be inserted into the outer diameter side of the inner ring. After the assembly is inserted into the inner ring, when the pressing that has elastically deformed the roller stopper in the outer diameter direction is released, the roller stopper is elastically restored in the inner diameter direction, and the roller is The roller is biased toward the raceway surface of the inner ring, and the inscribed circle diameter of the roller is smaller than the outer diameter of the outward flange, and is incorporated into the inner ring. As described above, in the present invention, the work of assembling the assembly with the cage into the inner ring is simplified, and the mass productivity is greatly improved. The roller holding distance at the time of incorporation is less than the roller diameter. Further, it is preferable that the concave groove is provided over the entire axial direction of the outer diameter surface including the annular portion from the pillar portion of the cage, but the roller stopper is more easily elastically deformed. It doesn't matter if some There are no particular restrictions on the material and heat treatment conditions of the cage. There are no particular limitations on the method of forming the outward ridges, such as shaving or press drawing. The number of roller stoppers may be one or more and is not particularly limited. The roller stopper may have a form protruding into the window hole or a form not protruding, and the form is not particularly limited. In order to make the elastic deformation easier, it is particularly preferable that the roller stoppers are provided on the outer diameter side of both inner side surfaces of the window hole. It is preferable to provide the roller stopper on the outer side of the groove side wall that forms the concave groove because the elastic deformation is facilitated. It is preferable that the groove side wall of the concave groove is thin in order to facilitate elastic deformation. Regardless of the number of grooves, one or more of the concave grooves are included on the outer diameter surface of the column portion. The concave groove is preferably linear in the axial direction in order to uniformly elastically deform the roller stoppers arranged in parallel in the axial direction on the inner surface of the window hole, but is not limited to being linearly arranged in parallel. . The cross-sectional shape of the concave groove may be anything, such as U, V, semicircle, semi-ellipse, etc., and is not particularly limited to the cross-sectional shape. The rollers are not limited to needle rollers, and may be rollers of other forms, and their cross-sectional shapes are not limited.

  A roller bearing according to the present invention is a roller bearing that includes an inner ring having an outward flange and a cage that is mounted on the inner ring over the outer flange while holding the roller. It has roller stoppers on both inner side surfaces of the hole, and at least the outer diameter surface of the column portion is provided with a concave groove that allows the roller stopper portion to be elastically deformed by pressing in the outer diameter direction by the roller. It is a feature.

  In the roller bearing having the above-described configuration, the cage with rollers can be easily incorporated by overcoming the outward flange of the inner ring.

  According to the present invention, since the cage with rollers can be easily assembled over the outward flange of the inner ring, the mass productivity of the roller bearing is improved.

  Hereinafter, a roller bearing retainer according to an embodiment of the present invention and a roller bearing provided with the same will be described with reference to the accompanying drawings. In the embodiment, the roller bearing is applied to a needle roller bearing, but the present invention can also be applied to other roller bearings.

  As shown in FIG. 1, the inner ring 20 of the needle roller bearing 10 according to the embodiment has outward flanges 22 and 23 on both sides of the cylindrical portion 21, and the cage 30 holding the needle rollers 40 is the raceway surface of the inner ring 20. 24. As shown in FIG. 2, the cage 30 is formed by connecting the annular portions 31 and 32 in the axial direction with a plurality of column portions 33 arranged at intervals in the circumferential direction, and the circumferential direction of each column portion 33. A window hole 34 for holding rollers is provided between them. One or a plurality of roller stoppers 35 are provided on the outer diameter side of both inner side surfaces 34a, 34a of the window hole 34, and a groove groove is formed on the outer diameter surface of the retainer 30 including the column portion 33 over the entire axial direction. 36 is provided.

  The cage 30 may be made of metal, but is preferably made of resin, and the inner diameter D1 is set so that the inner diameter surface of the retainer 30 does not interfere with the outward flanges 22 and 23 in the assembled state in the inner ring 20. , 23 is set larger than the outer diameter D2, and the cage width L1 is longer than the axial interval L2 of the inner side surfaces 22a, 23a of the outward flanges 22, 23, and the axial interval L3 of the outer side surfaces 22b, 23b. Shorter than. The outer diameter edges of the outer surfaces 22b, 23b of the outward flanges 22, 23 are formed on the inclined surfaces 22c, 23c. The roller stoppers 35 provided on the outer diameter sides of both inner side surfaces 34a, 34a of the window hole 34 are elastically deformed in the outer diameter direction in response to the pressing by the needle rollers 40 held in the window hole 34, and hold the rollers. The distance (circumferential facing distance of the outer diameter end of the roller stopper 35) L3 increases and elastically recovers in the inner diameter direction in response to the release of the pressing, so that the roller holding distance L3 decreases. The roller stopper 35 is formed on an inclined surface 35a that is easily pressed by the needle roller 40. The radial position of the continuous portion 37 between the inner side surfaces 34a, 34a of the window hole 34 and the inclined surface 35a of the stopper 35 is such that the needle roller 40 when the needle roller 40 is attached to the window hole 34 only by its own weight. The PCD (roller pitch circle diameter) is substantially aligned with the PCD.

  When the roller stopper 35 is pressed by the needle roller 40 attached to the window hole 34, the concave groove 36 is elastic in the inner diameter direction by elastic deformation of the roller stopper 35 in the outer diameter direction and release of the pressure. The restoration is allowed. The concave groove 36 has a shape surrounded by an axial groove bottom wall 36a and both side walls 36b erected on both sides in the circumferential direction of the groove bottom wall 36a. When the roller stopper 35 is pressed in the outer diameter direction by the needle roller 40, the concave groove 36 is subjected to a moment load in the pressing direction with the lower portion serving as a fulcrum on the groove side wall 36b. 36b is elastically deformed, and the roller stopper 35 comprising a part of the groove side wall 36b is also elastically deformed. The amount of elastic deformation and the amount of elastic recovery of the roller stopper 35 can be appropriately set by experiments and the like depending on the wall thickness and shape of the groove side wall 36b of the concave groove 36, or the material of the side wall 36b. The concave groove 36 is also formed on the entire outer diameter surface in the axial direction of the retainer 30 including the column portion 33. If the required amount of elastic deformation or elastic recovery of the roller stopper 35 is obtained, the concave groove 36 is circular. It can also be formed on the entire column portion 33 excluding the ring portions 31 and 32 or a part thereof. When the concave groove 36 is formed in a part of the column portion 33, the formation position can be determined including the relationship with the roller stopper 35.

  With reference to FIG. 3 and FIG. 4, assembly of the cage 30 to the inner ring 20 will be described. The cage 30 holds the needle rollers 40. FIG. 3A shows a state before the cage 30 is assembled to the inner ring 20, FIG. 3B shows a state during the assembly, and FIG. 3C shows a state where the assembly is completed. In FIG. 3A, only one of the plurality of needle rollers 40 is shown as a representative example, and the positions where all the plurality of needle rollers 40 are located in the window hole 34 of the retainer 30 are shown. Although there is not, it exists in the window hole 34 of the holder | retainer 30 according to each dead weight. In FIG. 3B, only one of the plurality of needle rollers 40 is shown as a representative example, but all the needle rollers 40 are pressed in the outer diameter direction by the outward flange 22 of the inner ring 20. As a result, the roller stopper 35 is pushed by the needle rollers 40 and elastically deformed, and the roller holding distance L3 is increased beyond a predetermined distance. In FIG. 3C, all the needle rollers 40 pass through the outward flange 22 of the inner ring 20, the roller stoppers 35 are elastically restored, and the roller holding distance L3 decreases to a predetermined distance. The state in which the cage 30 holding the roller 40 is incorporated in the inner ring 20 is shown.

  4 (a) corresponds to FIG. 3 (a) and shows a state in which the cage 30 is arranged on the right side of the inner ring 20, and FIG. 4 (b) corresponds to FIG. 3 (b). FIG. 4C shows a state in which the cage 30 is incorporated in the inner ring 20, and FIG. 4C corresponds to FIG.

    First, as shown in FIG. 4A, a cage 30 is arranged on the right side of the inner ring 20 in the drawing. At this time, the needle roller 40 is positioned with respect to the window hole 34 as shown in FIG. Of course, in FIG. 3A, as described above, only one of the plurality of needle rollers 40 is shown as a representative example, and all of the retainers 30 of the plurality of needle rollers 40 are shown. Although the position of presence in the window hole 34 is not shown, it exists in the window hole 34 of the cage 30 according to the load direction of its own weight with respect to each window hole 34. In FIG. 3A, an arrow F1 is shown as an example of the load direction of the own weight for understanding the illustration.

  Next, as shown in FIG. 4B, using an appropriate jig (not shown), the inscribed circle diameter of the needle roller 40 is held larger than the outer diameter of the outward flange 22 of the inner ring 20. The opening on one end side of the cage 30 is expanded, and the needle rollers 40 held in the cage 30 in this state are placed on the inclined surfaces 22c, 23c of the outer surfaces 22b, 23b of the outward flange 22 of the inner ring 20. Make contact. The needle roller 40 is moved in the outer diameter direction by contact with the inclined surfaces 22c and 23c of the outward flange 22 of the inner ring 20, and presses the roller stopper 35 in the outer diameter direction. By this pressing, the roller stopper 35, which is a part of the side wall 36b of the groove 36, receives a moment load and is elastically deformed as shown in FIG. 3B, so that the roller holding distance L3 increases. In this case, in order to understand the illustration of FIG. 3B, the pressing force (pressing load) applied to the needle roller 40 from the outward flange 22 is indicated by an arrow F2, and the pressing force (moment load) applied to the roller stopper 35 is indicated by an arrow. Indicated by F3, respectively. That is, the roller stopper 35 is elastically deformed in the outer diameter direction.

  When the roller holding distance L3 of the roller stopper 35 is increased, the needle roller 40 that is pressed from the outward flange 22 can move in the outer diameter direction because it gets over the outward flange 22, and thereby the needle roller The inscribed circle diameter of 40 becomes larger than the outer diameter of the outward flange 22 so that the needle roller 40 can get over the outward flange 22.

  Next, as shown in FIG. 4 (c), when the retainer 30 is further pushed into the inner ring 20 side and the needle rollers 40 get over the outward flange 22 and the contact with the outward flange 22 is released, As shown in FIG. 3C, the roller stopper 35 is not pressed from the needle roller 40, and is elastically restored. As a result, the roller holding distance L3 of the roller stopper 35 is reduced, and the needle roller 40 is By moving in the inner diameter direction, the assembly of the cage 30 to the inner ring 20 is completed. In the above, the roller stopper 35 is elastically restored in the inner diameter direction. In this case, in order to understand the illustration of FIG. 3C, the elastic restoring force of the roller stopper 35 is indicated by an arrow F4 by releasing the contact between the needle roller 40 and the outward flange 22, and the needle-like shape is obtained by this elastic restoring force. The moving force in the inner diameter direction applied to the roller 40 is indicated by an arrow F5.

  As described above, in the present embodiment, the retainer 30 that holds the needle rollers 40 can be easily assembled to the inner ring 20 having the outward flanges 22 and 23, thereby reducing the manufacturing cost of the roller bearings. Mass productivity can be improved.

  In the present embodiment, the number of the roller stoppers 35 may be arbitrary, and the roller stopper 35 having a form in which only a part of the inner side surfaces 34a, 34a of the window hole 34 protrudes toward the window hole 34 is used as the window hole. The inner surface 34a may be provided only on one of the inner surfaces 34a, but the other inner surface 34a itself may function as a roller stopper.

  Further, the shape of the roller stopper 35 may be variously modified. For example, the inclined surface 35a of the roller stopper 35 is set at various inclination angles as compared with the inner surfaces 34a, 34a of the window hole 34, or the arrangement position of the continuous portion 37 is arranged on the outer diameter side of the roller PCD. Alternatively, the inner surface 34a, 34a itself of the window hole 34 may be a roller stopper as an inclined surface configuration that can be pressed by the needle roller 40, and the like. When the inner side surfaces 34a and 34a themselves of the window hole 34 have an inclined surface configuration instead of the roller stopper 35 in the form of projecting toward the window hole 34, the inner side surfaces 34a and 34a have a stepped shape. In the case of the stepped shape, the stepped portion becomes a roller stopper that protrudes toward the window hole 34. In the case of the stepless shape, the inner side surfaces 34a, 34a The outer diameter side functions as a roller stopper.

  The present invention is not limited to the above-described embodiment, and can be carried out by making various changes or modifications within the scope of the claims.

It is sectional drawing of the needle roller bearing which concerns on embodiment of this invention. It is a perspective view of the holder | retainer of FIG. In the incorporation of the inner ring into the cage, (a) is a state before assembling the cage into the inner ring, (b) is a state during the assembly, and (c) is a diagram showing a state where the assembly is completed. In the arrangement of the inner ring and the cage, (a) is a state before assembling the cage into the inner ring, (b) is a state during the assembly, and (c) is a diagram showing a state where the assembly is completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Needle roller bearing 20 Inner ring 21 Cylindrical part 22 Outward flange 23 Outward flange 24 Raceway surface 30 Cage 31 Ring part 32 Ring part 33 Column part 34 Window hole 35 Roller stopper part 36 Concave groove 40 Needle roller 40

Claims (3)

  Roller bearing retainer that is built into the inner ring over the outer ring in the roller holding state, and at least the roller stoppers provided on both inner side surfaces of the window hole on the outer diameter surface of the column portion are in the outer diameter direction by the rollers. A concave groove that allows elastic deformation when pressed against the roller, the roller stoppers increase the roller holding distance by the elastic deformation, and the roller in the window hole faces outward when the roller passes over The roller bearing cage is characterized in that it can be moved in the outer diameter direction by abutting on the roller.   The roller bearing retainer according to claim 1, wherein the concave groove is provided over the entire axial direction of the outer diameter surface of the retainer.   A roller bearing having an inner ring with an outward flange and a cage that is mounted on the inner ring over the outer flange while holding the roller. The cage is provided on both inner surfaces of the window hole. A roller bearing comprising: a stopper groove, and a groove groove that allows at least an outer diameter surface of a column portion to elastically deform the roller stopper portion when pressed in the outer diameter direction by the roller.

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