JP2009097601A - Punching cage and separable roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily stabilize a hooking condition of a nonslip stopper and a partially cutout part, without redundantly punching a pocket, in the nonslip stopper of a punching cage. <P>SOLUTION: A projection part projected toward a plate thickness surface of the other end side annular part 42, is formed by pocket-punching on a plate thickness surface of one end side annular part 41 of the punching cage 4, and the nonslip stopper 45 is formed without redundantly punching the pocket in the roller axis (c) direction by grinding its projection part in a tapered shape of enlarging a projection margin in response to an advance to one side from the other side of inner-outer diameters. The nonslip stopper 45 and an inner peripheral wall surface are also hooked at a right angle by forming the inner peripheral wall surface at a right angle to a guide part 31 on one end surface side of a roller 3 in the partially cutout part 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a punching cage and a separation type roller bearing using the punching cage.

  Conventionally, in a roller bearing, one of the inner and outer races is provided with a race ring with both collars integrally formed on both sides of the raceway surface, and the race, the roller, and the cage are the inner race. There are separate types assembled into an assembly or outer ring assembly. As a cage, a cage punching cage in which each pocket is punched by pressing in a metal plate such as a steel plate or a brass plate is frequently used. A standard punching cage of this type is formed so as to hold the roller from one side of the inner and outer diameters at each column portion extending between the two annular portions. For this reason, when it fits in each pocket, it does not slip out from the pocket to one side of the inner and outer diameters. As an assembly method using this punching cage, conventionally, a jig is used as a subunit so that the rollers do not come out from each pocket of the punching cage to the other side of the inner and outer diameters. The roller is placed on the raceway surface by moving the roller over one of the collars.

  Here, in order to cause the roller to exceed one collar, the punching cage is subjected to radial deformation by press working, thereby increasing the clearance between the collar and the roller in this state. An assembly method has been implemented in which the punching cage is subjected to a radial deformation that returns the clearance to the original state by pressing, so that the subunit and the raceway are prevented from being scattered. .

  As described above, when the punching cage is subjected to press processing for expanding or reducing the clearance, the roundness of the punching cage is likely to be out of order, and the pressing process is troublesome. For this reason, there is a punching cage in which a pressing process is eliminated by forming a stopper on the inner periphery of each pocket (Patent Document 1).

  Specifically, a dull portion that is recessed toward the other end surface is formed on one end surface of the roller. Of the two annular portions of the punching cage, one end-side annular portion facing the one end surface of the roller is formed with a stopper that enters the shank portion. The retaining member forms a flange formed by bending one end side annular portion to the other side of the inner and outer diameters, and a tongue piece projecting from the flange to the inner and outer diameter one side, and the tongue piece is the other end of the two annular portions. It is formed by pushing toward the side annular portion and giving an inclination. When the roller is pushed into the pocket from the other side of the inner and outer diameters, the retainer receives one end side of the roller, and at this time, the other end side annular portion receives the other end surface of the roller. The stopper that receives one end of the roller generates a component force in the direction of the central axis of the roller by contact with an inclination with the roller. As a result, the punching retainer undergoes elastic deformation in which the retaining stopper escapes from one end surface of the roller, the peripheral edge portion of the one end surface of the roller overcomes the retaining stopper, and the retaining stopper enters the shading portion by elastic recovery. Of course, the roller is positioned in the direction of the center axis of the roller at both annular portions so that the retainer does not come off from the dull portion. Therefore, even if the roller tries to come out from the pocket to the other side of the inner and outer diameters, the retainer is caught by the dull portion, so that the roller is prevented from coming off.

  Therefore, if the punching cage and the roller disclosed in the above-mentioned Patent Document 1 are used, each pocket is previously stacked with the blank punching cage and the raceway inside and outside, so that the punching cage can be expanded and contracted. It can be assembled into an assembly without pressing.

Japanese Patent Laid-Open No. 11-62983

  However, since the stopper such as the punching cage disclosed in the above-mentioned Patent Document 1 is formed by tilting the tongue piece from the flange bent inwardly and outwardly, the pocket thickness is estimated in anticipation of at least the flange thickness. It is necessary to punch out redundant holes in the direction of the central axis, and accordingly, the yield of the material is lowered as compared with a standard punching cage in which the inner periphery of each pocket is formed from a plate thickness surface. In addition, since the retainer is tilted by press working, it is difficult to obtain shape accuracy, and it is difficult to stabilize the state of engagement with the dull portion.

  In view of the above circumstances, an object of the present invention is to make it easier to stabilize the punching retainer without slipping the pocket redundantly, and to stabilize the retaining state of the stopper and the shading portion.

  In order to achieve the above object, the present invention is configured to hold the roller from one side of the inner and outer diameters at each column portion extending between the two annular portions, and one end of the two annular portions that faces the slack portion of one end surface of the roller. In the side annular portion, a retainer that enters the thin portion is formed, and the retainer is made to enter the thin portion of the roller by pushing the roller from the other side of the inner and outer diameters into the pocket. On the plate thickness surface of the one end side annular portion, a protrusion protruding toward the plate thickness surface of the other end side annular portion is formed by pocket punching, and as the protrusion proceeds from the other side of the inner and outer diameters to the one side, In this configuration, the protrusion is ground into a tapered shape, and the tapered protrusion is used as the stopper.

  According to the configuration of the present invention, since the stopper is formed by tapering the protrusion formed by pocket punching, it is not necessary to punch a redundant hole in the roller central axis direction at the time of pocket punching. In addition, since the stopper is formed by grinding the protrusion into a taper shape, the shape accuracy of the stopper can be easily obtained as compared with the case where the inclination of the stopper is obtained by press working. It is easy to stabilize the hanging part.

By adopting a structure in which the inner peripheral wall surface that forms a right angle with the guide portion on the one end face side of the roller is employed in the loosening portion, the retaining portion and the thinning portion are hooked at a right angle, so that the roller is most securely retained. be able to.
That is, the direction in which the rollers try to come out of the pocket is determined by the contact between the guide portion and the collar surface. In other words, the roller tends to come out to the other side of the inner and outer diameters in a direction parallel to the guide portion. On the other hand, when the retainer is formed as described above, the retainer that is a part of the inner periphery of the pocket and the inner surface of the one-end-side annular portion on the one outer diameter side form the same surface. Usually, the inner circumference of each pocket of the punching cage is formed in parallel with the roller central axis as a whole. Therefore, if the inner peripheral wall surface that forms a right angle with the guide portion on the one end surface side of the roller is formed in the loose portion, the retaining portion and the thin portion are hooked at a right angle.
In order to realize this configuration with the conventional retaining stopper, the tongue piece is inclined as a whole to form the retaining stopper. Therefore, it is necessary to grind the tip of the tongue piece to a surface parallel to the roller central axis. In this case, since the retaining surface and the diameter surface on one side of the inner and outer diameters of the one-end-side annular portion form the same surface parallel to the roller center axis, grinding as in the conventional example is unnecessary.
The above-mentioned “right angle” is a concept of an angle having positive and negative widths as far as manufacturing errors are concerned, and is not limited to a configuration that is strictly 90 °.

  The roller can be composed of a cylindrical roller, a tapered roller, or a spherical roller.

  When the roller is constituted by a tapered roller, if the one end surface of the roller is a large end surface, the dent portion can be formed in a recess having a relatively large inner circumference as compared with the case where the small end surface is formed. The larger the inner circumference of the thinning portion, the easier it is to avoid interference with the stopper, and the thickness of the punching cage can be increased.

In the case of constituting a separate type roller bearing in which a bearing ring formed with both collars, a roller, and a punching cage are assembled in an assembly, the punching cage according to the present invention is tightened in a radial direction with respect to the bearing ring. It is assumed that there is no portion having a margin, and the retaining portion and the thinning portion may be in a non-contact relationship in a state where the rolling surface of the roller is in contact with the raceway surface.
Assuming that the punching cage does not have a portion that has a margin in the radial direction with respect to the raceway, the punching cage is moved closer to the axial direction with respect to the raceway with each pocket empty, and each pocket is It can be passed through the raceway so as not to interfere with the two collars until it faces the surface. That is, the press work for providing a clearance as in the prior art is not necessary.
If the stopper and the loosening part are in a non-contact relationship with the roller rolling surface in contact with the raceway surface, the rollers are pushed into the pocket from the other side of the inner and outer diameters with each pocket facing the raceway surface. , The stopper can be inserted into the shank.

In the case of configuring the above-described separation type roller bearing, it is preferable to adopt a configuration in which a cage guide surface is formed only on the collar on the side facing the other end side annular portion of the both collars. According to this configuration, the stopper can be made relatively easy to escape while guiding the punching cage with the raceway.
That is, when the punching cage is a raceway guide system, the annular portion is bent in the radial direction to form a flange, which is guided by the peripheral edge of the flange and the cage guide surface. When the flange is formed, the rigidity in the vicinity of the annular portion where the flange is formed increases. Therefore, if a flange is formed on the one end-side annular portion that forms the retainer, it will be difficult for the retainer to escape, but if the punching cage is guided only by the other end-side annular portion as in this configuration, it will be relatively It is possible to make it easy to escape.

  As described above, according to the present invention, a protrusion protruding toward the plate thickness surface of the other end side annular portion is formed by pocket punching on the plate thickness surface of the one end side annular portion, and the protrusion is formed with an inner and outer diameter. By adopting a configuration in which the protruding margin increases as it advances from the other side to the one side, and the tapered projection is used as the retaining mechanism, the retaining mechanism of the punching cage is made redundant and the pocket is made redundant. Without being punched out, it is possible to easily stabilize the retaining state of the retaining portion and the shading portion.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a partially enlarged view of an axial section of a separable roller bearing according to an embodiment. FIG. 2 is a partially enlarged view of the separable roller bearing according to the embodiment as viewed from the right side when viewed from the c-line direction in FIG. FIG. 3 conceptually shows, in perspective, an assembling process of the bearing ring assembly of the separated roller bearing according to the embodiment.

  As shown in FIGS. 1 and 2, the separation type roller bearing according to the embodiment includes inner and outer races 1 and 2, a roller constituted by a plurality of rollers 3, and a punching cage formed in a truncated cone shape. 4 is provided.

  The bearing ring 1 is a collared inner ring in which large and small collars 12 and 13 are formed on both sides of the raceway surface 11.

  The bearing ring 2 is an outer ring without a collar, and can be combined in the axial direction with an assembly comprising the bearing ring 1, the rollers, and the punching cage 4 from the raceway large end side.

  Each roller 3 consists of a tapered roller. An annular flat guide portion 31 guided to the flange surface of the collar 12 of the race 1 on the one end surface of each roller 3, and the large end surface in this embodiment, and the roller center axis c side from the guide portion 31 And a chamfered portion that connects the guide portion 31 and the rolling surface 33.

  The punching retainer 4 is a squirrel-shaped cage composed of one end-side annular portion 41, the other end-side annular portion 42, and each column portion 43 extending between both annular portions 41, 42. The punching cage 4 is formed from a steel plate. The one-end-side annular portion 41 is a large-diameter-side annular portion, and the other-end-side annular portion 42 is a small-diameter-side annular portion. Each column portion 43 is inclined in a direction along the roller center axis c in a state where the rolling surface 33 of the roller 3 that fits in the pocket 44 is in contact with the raceway surface 11.

  As shown in FIG. 1 and FIG. 3, the punching cage 4 does not have a portion having a margin in the radial direction with respect to the raceway ring 1. For this reason, the punching cage 4 can be passed through the raceway ring 1 in the axial direction from the one end side annular portion 41 side so that each pocket 44 faces the raceway surface 11.

  Of the large and small collars 12 and 13, the cage guide surface 13a is formed only on the small collar 13 on the side facing the annular portion 42 on the other end side. The cage guide surface 13a is formed on the outer diameter surface of the small brim 13 and is a cylindrical surface concentric with the shaft center. The flange portion formed in the other end side annular portion 42 has a front end circumferential edge concentric with the shaft center. In a state where each pocket 44 faces the raceway surface 11, the punching cage 4 is centered by the flange tip circle periphery of the other end side annular portion 42 and the cage guide surface 13a. If the punching retainer 4 is a raceway guide system, the punching retainer can be used even when a large force is applied to the roller 3 due to external vibration, rolling delay of the roller 3, skew of the roller 3 or the like when the bearing is operated. As a result, the punching cage 4 can be prevented from being damaged as compared with the rolling element guide system.

  In the centering state, the radial clearance δ1 between the one end side annular portion 41 and the large brim 12 is larger than the radial direction clearance δ2 between the flange of the other end side annular portion 42 and the cage guide surface 13a. Interference between the one end side annular portion 41 and the large brim 12 is prevented.

For the guide of the punching cage 4, instead of the above, a configuration in which a cage guiding surface is formed only on the large brim 12 and a configuration in which a cage guiding surface is formed on each of the collars 12 and 13 are appropriately adopted. be able to.
If the structure in which the cage guide surface is formed only on the large brim 12 is adopted, the punching cage is guided with a larger circumference, so that the behavior of the punching cage can be further stabilized, and the cage can be further damaged. It can also be prevented.
If the structure which formed the cage | basket guide surface in each of both the collars 12 and 13 is employ | adopted, the deformation | transformation of the radial direction of the whole punching holder | retainer can be prevented, and a cage | basket breakage can be prevented further.

  As shown in FIG. 2, in each column portion 43, the minimum interval between the column portions 43, 43 adjacent in the circumferential direction is smaller than the roller diameter of the roller 3, and the rolling surface 33 of the roller 3 is the raceway surface 11. Is formed so as to be positioned on one side of the inner and outer diameters from the roller center axis c in this state, in this embodiment, on the inner diameter side. Even if each roller 3 that fits in each pocket 44 tries to come out to one side of the inner and outer diameters, it can be pulled out to one side of the inner and outer diameters because it is held by the adjacent pillars 43 and 43.

  Each column portion 43 is formed so as to be in contact with the roller 3 that fits in the pocket 44 only at the surface portion. Thereby, edge contact | abutting of the roller 3 and the pillar part 43 is prevented, and damage and abrasion of the punching cage 4 and the rolling surface 33 of the roller 3 can be prevented.

  The surface portion is, for example, a tapered flat surface portion 43a that approaches the roller 3 side as it advances from the other side of the inner and outer diameters to the one side, as shown in an enlarged radial cross section of the column portion 43 in FIG. 4a. it can.

  As shown in FIG. 4B, another example of the surface portion may be the R-shaped surface portion 43b having a center of curvature on the column portion 43 side. If the R-shaped surface portion 43 b is employed, the clearance between the roller 3 and the rolling surface 33 increases as the inner and outer diameter surfaces of the column portion 43 are approached. Therefore, an oil film is formed between the column portion 43 and the rolling surface 33. Can be promoted. The surface portions 43a and 43b may be formed by either surface pressing or grinding.

  As shown in FIGS. 1 to 3, a stopper 45 is formed in the one end side annular portion 41 facing the one end surface of each roller 3. The stopper 45 is a tapered protrusion whose protrusion margin increases as it advances from the other side of the inner and outer diameters to the one side.

FIG. 5 shows an axial cross section of the process of storing the roller 3 in the pocket 44 of the punching cage 4.
As shown in FIGS. 3 and 5, each pocket 44 of the punching cage 4 faces the raceway surface 11 of the race 1 in an empty state, and the rollers 3 are placed from the other side of the inner and outer diameters to the one side with respect to the pocket 44. As shown by a two-dot chain line in FIG. 5, the chamfered portion on one end side of the roller 3 is received by the stopper 45, and the other end surface of the roller 3 is received by the other end side annular portion 42. When the roller 3 is pushed to one side of the inner and outer diameters from this state, a component force is generated in the direction of the roller central axis c due to the taper of the retainer 45 that receives the indentation force of the roller 3, and the punching retainer 4 is prevented from coming off as a whole. The elastic deformation 45 escapes from the one end surface of the roller 3 is produced.

  As shown in FIG. 1, the stopper 45 and the thinning portion 32 are in a non-contact relationship with the rolling surface 33 of the roller 3 in contact with the raceway surface 11. Naturally, the roller 3 can be pushed into one side of the inner and outer diameters until the guide portion 31 on one end surface of the roller 3 gets over the stopper 45. When the guide part 31 of the roller 3 gets over the retaining part 45, the retaining part 45 enters the shank part 32 due to elastic recovery, and becomes the state shown in FIG. Until the guide part 31 gets over, the component force due to the taper of the retainer 45 is continuously obtained. Therefore, the retainer 45 is not attached to the guide part 31 of the roller 3 even if the retainer 45 is not formed into a tongue-like shape as in the conventional example. It can be easily overcome.

Of the plate thickness surface of the one-end-side annular portion 41, the other portion excluding the retainer 45 (the hidden line portion indicated by the retainer 45 in FIG. 1), the plate-thick surface of the other-end-side annular portion 42, The pocket clearance in the direction of the roller central axis c is determined in such a range that the retainer 45 is not removed from the thinning portion 32 because the roller 3 is pushed into the pocket 44 as described above.
Therefore, as shown in FIG. 6, even if the roller 3 tries to come out from the pocket 44 to the other side of the inner and outer diameters due to its own weight, the stopper 45 is caught by the shank portion 32, so that the roller is prevented from coming off. FIG. 6 shows a cut surface including the roller center axis c.

A diameter surface on one side of the inner and outer diameters of the retainer 45 and the inner peripheral wall surface 32a are hooked at a right angle when the roller 3 tries to come out in a direction parallel to the guide portion 31. This is because the roller 3 is most securely retained.
Specifically, the guide portion 31 of the roller 3 and the inner peripheral wall surface 32a of the shading portion 32 form a right angle when viewed from a cut surface including the roller center axis c, as indicated by the inner angle θ in FIG. Is formed.
Here, since the roller 3 is a tapered roller, it has an inclination angle with respect to the bearing center line. On the other hand, the cone angle of the truncated cone shape presented by the punching cage 4 is designed so as to coincide with the inclination angle of the roller 3, and the diameter surface on one side of the inner and outer diameters of the retainer 45 is also the bearing center line. However, it is inclined in the same way as roller 3. Therefore, the inner peripheral wall surface 32a of the shading portion 32 and the radial surface on one side of the inner and outer diameters of the retainer 45 can be hooked at a right angle.

  As described above, as a result of the non-contact relationship between the thinning portion 32 and the stopper 45 in a state where the rolling surface 33 of the roller 3 is in contact with the raceway surface 11, as shown in FIG. 41 In a state where 3 is in contact, the retaining 45 (height) and the shank 32 (depth) have sufficient clearance in the bearing central axis direction, and the radial pocket clearance between the retaining 45 and the shank 32 is provided. Is sufficiently larger than the radial clearance between the roller 3 and the cage post 43. As a result, the interference between the stopper 45 and the shading portion 32 during the operation of the bearing is reliably prevented.

  As will be apparent from the fact that the stopper 45 has a tapered surface extending between the inner and outer diameter surfaces of the one-end-side annular portion 41, the other end of the one-end-side annular portion 41 is formed on the plate thick surface of the one-end-side annular portion 41. A rectangular parallelepiped protrusion protruding toward the plate thickness surface of the side annular portion 42 is formed, and the rectangular parallelepiped protrusion is ground into a taper shape in which the protrusion margin increases as it advances from the other side of the inner and outer diameters to the one side. It is formed by doing. Therefore, at the time of pocket punching, a redundant hole in the direction of the roller center axis c is punched into the workpiece, as in the conventional example, in the other portion of the plate thickness surface of the one-end-side annular portion 41 except for the retainer 45. There is no need.

  Further, since the stopper 45 is formed by grinding the rectangular parallelepiped protrusion into a taper shape, it is easy to obtain the shape accuracy of the stopper 45 compared to the case where the inclination of the stopper is given by pressing. It is easy to stabilize the degree of engagement between the stopper 45 and the shading portion 32.

  Note that the grinding for forming the retainer 45 is performed after pocket punching after forming a truncated cone-shaped workpiece like a punching retainer for tapered rollers. In addition, when the two annular portions are connected by welding after pocket punching is performed on a belt-like work like a cylindrical roller punching cage, grinding may be performed at any time before and after welding.

Sectional drawing which shows the whole structure of the separation type roller bearing according to the embodiment in an axial section The partial enlarged view which showed the right side surface of the separation type roller bearing of FIG. 1 from the direction parallel to a roller central axis The conceptual diagram which shows the assembly process of the bearing ring assembly of the separation type roller bearing of FIG. a is a partially enlarged view showing the pillar portion of FIG. 1 in a radial section, and b is a partially enlarged view showing another pillar portion in a radial section. Partial expanded sectional view which shows a mode that a roller is stored in the pocket of the punching cage of FIG. FIG. 1 is an operational view showing a state in which the retainer of the punching cage of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2, Race ring 3 Roller 4 Punching holder 11 Raceway surface 12, 13 Collar 13a Cage guide surface 31 Guide part 32 Nuts part 32a Inner peripheral wall surface 33 Rolling surface 41 One end side annular part 42 The other end side annular part 43 Column Part 43a, 43b face part 44 pocket 45 retaining

Claims (5)

  Holding the roller from one side of the inner and outer diameters at each column part extending between the two annular parts, of the two annular parts, the one-end-side annular part facing the thin part of the one end face of the roller enters the loose part. In the punching retainer in which the stopper is inserted into the thin portion of the roller by pushing the roller from the other side of the inner and outer diameters into the pocket, A protrusion protruding toward the plate thickness surface of the end-side annular portion is formed by pocket punching, and the protrusion is ground into a taper shape in which the protrusion margin increases as it advances from the other side of the inner and outer diameters, A punching retainer characterized in that the tapered projection is used as the stopper.   The punching retainer according to claim 1, wherein an inner peripheral wall surface that forms a right angle with the guide portion on one end surface side of the roller is formed in the blind portion.   The punching cage according to claim 1 or 2, wherein the roller is constituted by a tapered roller, and one end surface of the roller is a large end surface.   A portion comprising the punching cage according to any one of claims 1 to 3 and a race ring formed with both collars, wherein the punching cage has a margin in a radial direction with respect to the race ring. A separation type roller bearing in which the retaining and the loosening portion are not in contact with each other in a state where the rolling surface of the roller is in contact with the raceway surface.   The separation type roller bearing according to claim 4, wherein a cage guide surface is formed only on a collar facing the other end side annular portion of the both collars.

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