JP2013113359A - Retainer for roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retainer for a roller bearing configured to prevent fall of a roller from a pocket hole when an inner ring is removed.SOLUTION: A band-shaped steel plate 11 is a retainer 10 for the roller bearing including: pillar parts 20, 25 provided on both circumferential sides of pocket holes 12, 13; a first annular part 30 and a second annular part 35 provided in both axial sides of the pocket holes 12, 13; and claw parts 21, 22, 26, 27 preventing fall of rollers. Both ends 31, 32, 36, 37 of the band-shaped steel plate 11 are provided in the first annular part 30 and the second annular part 35 forming one pocket hole 13. The claw part is constituted of first claw parts 26, 27 formed of an elastically deformable elastic material projecting toward one pocket hole 13, and second claw parts 21, 22 formed by elastic deformation of parts of the band-shaped steel plate 11 projecting to the other pocket hole 12. The first claw parts 26, 27 project by an amount enough to prevent fall of a roller from the one pocket hole 13 even if both ends 31, 32, 36, 37 of the band-shaped steel plate 11 are separated.

Description

  The present invention relates to a roller bearing retainer that rotatably holds, for example, a cylindrical roller.

  For example, a conventional welded cage for roller bearings is shown in FIG. 6 (Patent Document 1). 100 is a strip steel plate, 101 is a pocket hole, 102 is a pillar portion on both sides in the circumferential direction of the pocket hole 101, 106 and 107 are first and second annular portions on both axial sides of the pocket hole 101, and 108 and 109 are The welds 110 and 111 are weld beads.

  This roller bearing welded cage is made by rolling a strip-shaped steel plate 100 having a constant width and cut to a predetermined length into an annular shape. The roller bearing welded cage has a plurality of rolling element storage pocket holes 101 in the circumferential direction, and among the plurality of pocket holes 101, a first annular part 106 and a second annular part constituting one pocket hole 101 are provided. Both ends of the portion 107 are butt welded, and welds 108 and 109 are formed between the both ends.

Japanese Patent No. 4525247

  When the roller cage welded cage and cylindrical roller are inserted between the inner and outer rings and the inner ring is rotated relative to the outer ring, the force to try to divide the roller bearing welded cage due to the advance and delay of the cylindrical roller is circumferential. Act on. Since the welded portions 108 and 109 are weaker than the first annular portion 106 and the second annular portion 107, the welded portions 108 and 109 are likely to be divided. When the inner ring is pulled out in a state where the welded portions 108 and 109 are separated, there is a problem that the cylindrical roller falls from the one pocket hole 101. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a roller bearing retainer in which a roller does not fall from a pocket hole when an inner ring or an outer ring is pulled out.

The invention according to claim 1 is formed of a strip-shaped steel plate having a ring shape and a plurality of pocket holes for storing rollers in the circumferential direction, and the strip-shaped steel plates are column portions provided on both sides in the circumferential direction of the pocket holes. And a first annular portion and a second annular portion provided on both sides in the axial direction of the pocket hole, and a claw portion that protrudes from the column portion toward the pocket hole and prevents the roller from coming off. A cage, wherein both ends of the belt-shaped steel plate are provided in the first annular portion and the second annular portion forming one pocket hole among the plurality of pocket holes in the circumferential direction, A first claw portion that protrudes into the one pocket hole and is formed of an elastically deformable elastic material; and a second claw portion that protrudes into a pocket hole other than the one pocket hole and is formed by plastic deformation of a part of the belt-shaped steel plate; Both ends of the strip steel plate There is also spaced apart, the rollers of the first claw portion projecting amount so as not to fall from the one pocket holes are those with.
According to a second aspect of the present invention, the elastic material of the first claw portion is composed of a rubber material.

  According to the present invention, when the inner ring or the inner ring is pulled out, even if both ends of the strip steel plate are separated, the first claw portion formed of an elastically deformable elastic material prevents the roller from dropping from the pocket hole. it can.

It is a perspective view of the cage for roller bearings in the embodiment of the present invention. It is A arrow directional view of FIG. 1 of the roller bearing retainer in embodiment of this invention. It is an expansion | deployment top view of the cage for roller bearings in embodiment of this invention. It is the expanded sectional view which carried out the cross section at the axial direction middle of the roller bearing retainer in the embodiment of the present invention. FIG. 6 is a state diagram corresponding to FIG. 4 of the roller bearing retainer in the embodiment of the present invention, in which both ends of the strip steel plate are separated. It is an expansion | deployment top view of the conventional welding cage for roller bearings.

  An embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of a roller bearing retainer, FIG. 2 is a view of the roller bearing retainer as viewed in the direction of arrow A in FIG. 1, and FIG. 3 is a developed plan view of the roller bearing retainer. FIG. 5 is an enlarged sectional view of the roller bearing cage in the middle in the axial direction, and FIG. 5 corresponds to FIG. 4 and is a state diagram in which both ends of the strip steel plate are separated.

  In FIG. 1 thru | or FIG. 3, 10 shows the whole cage for roller bearings. 11 is a strip-shaped steel plate, 12 and 13 are pocket holes, 20 and 25 are column portions on both sides in the circumferential direction of the pocket holes 12, and 30 and 35 are first and second annular portions on both axial sides of the pocket holes 12 and 13, respectively. , 21, 22, 26 and 27 are claw portions, 31 and 32 are both end portions of the first annular portion 30 of the strip-shaped steel plate 11, and 36 and 37 are both end portions of the second annular portion 35 of the strip-shaped steel plate 11. .

  The roller bearing retainer 10 is obtained by rounding a sheet steel plate 11 having a plurality of pocket holes 12 and 13 in the circumferential direction into a ring shape. The strip-shaped steel plate 11 includes column portions 20 and 25 provided on both sides in the circumferential direction of the pocket holes 12 and 13, and a first annular portion 30 and a second annular portion 35 provided on both axial sides of the pocket hole 12. It has become.

  The pocket holes 12, 13 have a rectangular shape in plan view (FIG. 3) surrounded by the column parts 20, 25 on both sides in the circumferential direction and the first annular part 30 and the second annular part 35 on both axial sides. Yes. The column portions 20 and 25 are portions extending in the axial direction with a constant width in the circumferential direction, and the first annular portions 30 and 35 are portions extending in the circumferential direction with a constant width in the axial direction.

  There are twelve column portions 20 and 25 in total, ten of which are the column portions 20 and the remaining two are the column portions 25. Of the plurality of pocket holes 12 and 13 in the circumferential direction, the column portions 25 are positioned on both sides in the circumferential direction by only one pocket hole 13. Only the pocket hole 12 on both sides of the one pocket hole 13 is provided with the column part 20 and the column part 25 on both sides in the circumferential direction. The column portions 20 are located on both sides in the circumferential direction of the remaining pocket holes 12 other than the above.

  Between the two column parts 25, it has the cutting part made when the strip | belt-shaped steel plate 11 is cut | disconnected from the hoop material mentioned later in the middle of the circumferential direction of the pocket hole 13. FIG. This cut part is cut straight in the width direction of the strip steel plate 11 and in the thickness direction of the strip steel plate 11. On both sides of the cut portion, the first annular portion 30 has both end portions 31 and 32, and the second annular portion 30 has both end portions 36 and 37.

  The column part 25 has claw parts 26 and 27 protruding toward the pocket hole 13 and has claw parts 21 and 22 protruding toward the pocket hole 12. The column part 20 has claw parts 21 and 22 protruding toward the pocket hole 12 side. The claw portions 26 and 27 are made of a rubber material vulcanized and bonded to the strip steel plate 11, for example, nitrile rubber, and the claw portions 21 and 22 are formed by plastic deformation of a part of the strip steel plate 11. The claw portion 21 and the claw portion 26 are provided on the first annular portion 30 side, and the claw portion 22 and the claw portion 27 are provided on the second annular portion 35 side.

  A recess 20 a is formed on the inner peripheral surface of the column part 20 at a position corresponding to the claw parts 21 and 22. The recess 20a is formed using a plastic press die (not shown), and at the same time, the claws 21 and 22 are formed by plastic working using the material in the recess 20a.

  As shown in FIG. 4, a recess 20 b is formed on the inner peripheral surface of the column portion 25 at a position corresponding to the claw portions 21 and 22. The recess 20b is formed using a plastic press die (not shown), and at the same time, the claws 21 and 22 are formed by plastic working using the material in the recess 20b.

  A recess 20 c is formed on the inner peripheral surface of the column portion 25 at a position corresponding to the claw portions 26 and 27. The recess 20c is formed using a plastic press die not shown. The recess 20c can increase the vulcanization adhesion area of the claw portions 26 and 27 to the column portion 25, and the claw portions 26 and 27 are less likely to drop off from the column portion 25.

  As shown in FIGS. 1 to 5, any of the claw portions 21, 22, 26, 27 projects so as to be tapered toward the pocket holes 12, 13, has a triangular shape in cross section, and on the outer diameter side. Has an inclined surface. The amount of protrusion of the claws 26 and 27 toward the pocket hole 13 is larger than the amount of protrusion of the claws 21 and 22 toward the pocket hole 12. Even when the both end portions 31 and 32 of the first annular portion 30 and the both end portions 36 and 37 of the second annular portion 30 are separated from each other, the projection amount to the extent that the cylindrical rollers 50 are caught by the claws 26 and 27 is reduced. 27 has (FIG. 5).

  Next, a method for manufacturing the roller bearing retainer 10 will be described with reference to FIGS. The belt-shaped steel plate 11 is pressed to create a flattened plane of the roller bearing cage 10 (FIG. 3). As a material of the strip steel plate 11, for example, a SPCC hoop material having excellent formability can be used.

  A punching and cutting press die is used to create a flattened plane of the roller bearing retainer 10, whereby a plurality of pocket holes 12, 13, cutting portions between both end portions 31, 32, and between both end portions 36, 37 are used. Are simultaneously formed. That is, material punching and material cutting are performed simultaneously. Subsequently, the claw portions 21 and 22 and the recesses 20a, 20b, and 20c are simultaneously formed on the belt-shaped steel plate 11 by a plastic deformation press die. The material in the recesses 20a and 20b is pushed out toward the claws 21 and 22, and the claws 21 and 22 are formed by plastic deformation. When the flat strip steel plate 11 is set in a rubber injection mold and the rubber material is injected into the recess 20c, the claws 26 and 27 are formed at the same time as being vulcanized and bonded to the recess 20c. Subsequently, the belt-shaped steel plate 11 is bent into an annular shape by a bending die (FIG. 1).

  Thereafter, heat treatment and barrel processing are performed on the belt-shaped steel plate 11, cylindrical rollers are loaded into the roller bearing retainer 10 thus formed, and an outer ring is further fitted. This shape is shipped as a set, and the inner ring is assembled at the customer.

  After the assembly, for example, when the inner ring is rotated with respect to the outer ring, the cylindrical roller 50 rolls on the outer ring and the inner ring, and the roller bearing welded cage 10 rotates in the same direction as the inner ring. Between the outer ring and the inner ring, for example, a large radial load is applied at one place on the circumference, the advance and delay of the cylindrical roller 50 increases toward the place where the radial load is applied, and the place where the radial load is applied. When passing, the cylindrical roller 50 advances and recovers the delay. For this reason, a tensile load acts on the roller bearing welded cage 10 in the circumferential direction, and this tensile load increases toward the place where the radial load is acting. Even if the maximum tensile load acts on the first annular portion and the second annular portion 22, it does not have a welded portion, so that there is no possibility of breaking.

  When the maximum tensile load acts between both end portions 31 and 32 and between both end portions 36 and 37, both end portions 31 and 32 and both end portions 36 and 37 are separated (FIG. 5). As shown in FIG. 4, the claw portions 26 and 27 bent to the inner diameter side are elastically restored and extend straight toward the pocket hole 13 as shown by the solid line in FIG. 5 or the two-dot line in FIG. 4. It becomes. Even if the inner ring is pulled out in such a state, the cylindrical rollers 50 are not dropped from the pocket holes 13 by being caught by the claw portions 26 and 27 (FIG. 5). For reference, in the case of the claw portions 21 and 22 indicated by a two-dot chain line in FIG. 5, the cylindrical roller 50 falls off from the pocket hole 13. At a position shifted by 180 degrees from the position where the radial load is applied, the maximum compression load is applied. When this is applied between the end portions 31, 32 and between the end portions 36, 37, the end portions 31, 32 and the end portions Between 36 and 37, it will be in the closed state, as shown in FIG.

  The present invention is not limited to these embodiments, and can of course be implemented in various modes without departing from the gist of the present invention.

  In the embodiment described above, the claw portions 21, 22, 26, and 27 are provided on the inner diameter side of the column portions 20 and 25, and the cylindrical roller 50 is prevented from being pulled out toward the inner diameter side. As another embodiment, the claw portions 21, 22, 26, and 27 may be provided on the outer diameter side of the column portions 20 and 25 to prevent the cylindrical roller 50 from coming off to the outer diameter side.

  In the embodiment described above, the claw portions 26 and 27 are made of a rubber material such as nitrile rubber. As another embodiment, the claw portions 26 and 27 may be made of styrene / butadiene rubber, chloroprene rubber, acrylic rubber, or urethane rubber.

  In the embodiment described above, the claw portions 26 and 27 are made of a rubber material. As another embodiment, you may comprise with spring steel.

10: Roller bearing cage, 11: Strip steel plate, 12: Pocket hole, 13: Pocket hole, 20: Column part, 21: Claw part (second claw part), 22: Claw part (second claw part), 25: pillar part, 26: claw part (first claw part), 27: claw part (first claw part), 30: first annular part, 31: both end parts, 32: both end parts, 35: second annular part 36: Both ends, 37: Both ends

Claims (2)

It is made of a strip-shaped steel plate having a ring shape and a plurality of pocket holes for storing rollers in the circumferential direction. The strip-shaped steel plate has column portions provided on both sides in the circumferential direction of the pocket hole, and both axial sides of the pocket hole. A roller bearing retainer comprising: a first annular portion and a second annular portion provided on a cylindrical portion; and a claw portion that protrudes from the column portion toward the pocket hole and prevents the roller from coming off. Are provided in the first annular portion and the second annular portion forming one pocket hole among the plurality of pocket holes in the circumferential direction, and the claw portion protrudes into the one pocket hole and is elastic. A first claw portion formed of a deformable elastic material, and a second claw portion that protrudes into a pocket hole other than the one pocket hole and is formed by plastic deformation of a part of the strip-shaped steel plate, both end portions of the strip-shaped steel plate Even if the Roller bearing cage, characterized in that it comprises a projecting amount so as not to fall from the one pocket holes of the first claw portion. The roller bearing retainer according to claim 1, wherein the elastic material of the first claw portion is a rubber material.

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