JP2007263292A - Rolling bearing cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the generation of scratches on the end or a collar of a roller upon press-fitting the roller into a pocket of a cage. <P>SOLUTION: In the rolling bearing cage where the roller 3 is press-fitted into the pocket 5 from the inner diameter side, when the diameter of the roller 3 is d, the width of the opening on the inner diameter side of the pocket 5 is W, and the pitch circle diameter on the inner diameter side of the pocket 5 is Dpi, the outer diameter Do of an annular part 4a is within a range of an expression (1). Thereby, when the roller 3 is pressed against the opening edge of the annular part 4a, the roller 3 is made to protrude from the outer diameter face of the annular part 4a, and the roller 3 is press-fitted into the pocket 5 while the end of the roller 3 protruded from the outer diameter face of the annular part 4a is guided in the axial direction by the collar 1b of an outer ring 1 along the outer diameter face of the annular part 4a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a roller bearing retainer.

  In a roller bearing retainer, a plurality of annular portions spaced apart in the axial direction are joined together by a plurality of pillars in the circumferential direction, and the rollers are radiused into pockets defined by the annular portions and the pillars. There is one that is press-fitted from the direction (see, for example, Patent Document 1).

  When press-fitting rollers into the pockets of this type of roller bearing cage, set the annular part of the cage along the flanges on both sides of the raceway surface of the outer ring or inner ring, and When setting along the outer ring side, the rollers are pressed into the pocket from the inner diameter side, and when setting the cage along the inner ring side, the rollers are pressed into the pocket from the outer diameter side, Arranged on the raceway between the ridges. The opening width between the column portions on the inner diameter side or outer diameter side of the pockets into which these rollers are press-fitted is formed to be slightly narrower than the roller diameter in order to prevent the rollers from falling off. It press-fits into a pocket in the state pressed against the opening edge between the formed pillar parts.

JP-A-11-218135

  In the roller bearing using the roller bearing retainer as described above, when the roller is pressed into the pocket while being pressed against the opening edge between the column portions, the roller is displaced in the axial direction and either one of the raceway surfaces. Striking scratches may occur at the ends of the rollers and the heels. Such scratches can also cause seizure between the roller that restricts the axial movement of the roller when the bearing is used.

  Accordingly, an object of the present invention is to prevent scratching at the end portion and the ridge of the roller when the roller is press-fitted into the pocket of the cage.

  In order to solve the above-described problems, the present invention combines a plurality of annular portions with an outer diameter surface along the flange of the outer ring and spaced apart in the axial direction with a plurality of column portions in the circumferential direction. Roller is press-fitted into the pocket defined by the annular part and pillar part from the inner diameter side, and the opening width between the pillar parts on the inner diameter side of the pocket for press-fitting this roller is made narrower than the diameter of the roller In the bearing cage, when the roller is pressed against an opening edge between the column portions on the inner diameter side of the pocket, a configuration is adopted in which the roller protrudes from the outer diameter surface of the annular portion.

  That is, when the roller is pressed against the opening edge between the column portions on the inner diameter side of the pocket, the roller is projected from the outer diameter surface of the annular portion by projecting the roller from the outer diameter surface of the annular portion. The roller is pressed into the pocket while guiding the end of the roller in the axial direction with the collar of the outer ring that runs along the outer diameter surface of the ring part, so that the end of the roller and the collar are not scratched. .

When the diameter of the roller is d, the opening width on the inner diameter side of the pocket is W, and the pitch circle diameter of the opening on the inner diameter side of the pocket is Dpi, the outer diameter Do of the annular portion is (1) By setting the range of the formula, when the roller is pressed against the opening edge between the column portions on the inner diameter side of the pocket, the roller can be protruded from the outer diameter surface of the annular portion.

したがって、（１２）〜（１４）式を（１１）式に代入して整理することにより、（１）式が得られる。 FIG. 7 shows a state in which the roller 3 is pressed against the opening edge between the column portions 4 b of the cage 4 when the roller 3 is press-fitted into the pocket 5 of the cage 4 from the inner diameter side. In this figure, in order to make the explanation easy to understand, the outer diameters of the annular portion 4a and the column portion 4b of the cage 4 are made equal. In FIG. 7, the condition that the roller 3 protrudes toward the outer diameter side of the annular portion 4a is expressed by the equation (11).
A <BC (11)
Here, A, B, and C are determined by a geometrical relationship, and are represented by equations (12) to (14), respectively.

Therefore, the formula (1) is obtained by substituting the formulas (12) to (14) into the formula (11) and rearranging them.

  In the present invention, a plurality of annular portions having an inner diameter surface along an inner ring flange and spaced apart in the axial direction are coupled by a plurality of column portions in the circumferential direction. In the roller bearing retainer in which the roller is press-fitted into the partitioned pocket from the outer diameter side, and the opening width between the column portions on the outer diameter side of the pocket into which the roller is press-fitted is narrower than the diameter of the roller, A configuration was also adopted in which when the roller was pressed against the opening edge between the column portions on the outer diameter side of the pocket, the roller protruded from the inner diameter surface of the annular portion.

  That is, when the roller is pressed against the opening edge between the column portions on the outer diameter side of the pocket, the roller is projected from the inner diameter surface of the annular portion by projecting the roller from the inner diameter surface of the annular portion. The rollers were pressed into the pockets while guiding the ends in the axial direction with the inner ring ribs along the inner surface of the ring portion, so that the ends of the rollers and the ribs were not scratched.

When the diameter of the roller is d, the opening width on the outer diameter side of the pocket is W, and the pitch circle diameter of the opening on the outer diameter side of the pocket is Dpo, the inner diameter Di of the annular portion is (2 When the roller is pressed against the opening edge between the column portions, the roller can protrude from the inner surface of the annular portion.

したがって、（２２）〜（２４）式を（２１）式に代入して整理することにより、（２）式が得られる。 FIG. 8 shows a state in which the roller 3 is pressed against the opening edge between the column portions 4 b of the cage 4 when the roller 3 is press-fitted into the pocket 5 of the cage 4 from the outer diameter side. Also in this figure, in order to make the explanation easy to understand, the inner diameters of the annular portion 4a and the column portion 4b of the cage 4 are made equal. In FIG. 8, the condition that the roller 3 protrudes toward the inner diameter side of the annular portion 4a is expressed by the equation (21).
E <F + G (21)
Here, E, F, and G are determined by a geometric relationship, and are expressed by the equations (22) to (24), respectively.

Therefore, the formula (2) is obtained by substituting the formulas (22) to (24) into the formula (21) and rearranging them.

  The roller bearing retainer of the present invention is such that the roller is press-fitted into the pocket from the inner diameter side, and when the roller is pressed against the opening edge between the pillar portions on the inner diameter side of the pocket, the roller is The end of the roller that protrudes from the outer diameter surface of the ring portion is guided in the axial direction by the flange of the outer ring that runs along the outer diameter surface of the ring portion. However, the roller can be press-fitted into the pocket so that the end of the roller and the flaw can be prevented from being scratched, and seizure between the roller and the flaw when the bearing is used due to this flaw can be prevented.

  Further, the roller bearing retainer of the present invention is such that the roller is press-fitted into the pocket from the outer diameter side, and when the roller is pressed against the opening edge between the column portions on the outer diameter side of the pocket, Since the roller protrudes from the inner surface of the ring part, the end of the roller protruded from the inner surface of the ring part is guided in the axial direction by the flange of the inner ring along the inner surface of the ring part. However, the roller can be press-fitted into the pocket, so that the end of the roller and the flaw can be prevented from being scratched, and seizure between the roller and the flaw when using the bearing due to this scratch can be prevented. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a roller bearing using the roller bearing retainer 4 of the first embodiment. In this roller bearing, a plurality of rollers 3 are held by a cage 4 between a raceway surface 1 a provided on the inner diameter surface of the outer ring 1 and a raceway surface 2 a provided on the outer diameter surface of the inner ring 2. Yes, on both sides of the raceway surface 1 a of the outer ring 1, flanges 1 b that restrict the axial movement of the rollers 3 are provided.

  As shown in FIG. 2, the retainer 4 is formed by connecting two annular portions 4a spaced apart in the axial direction by a plurality of column portions 4b in the circumferential direction, and these annular portions 4a and columns. The roller 3 is press-fitted into the pocket 5 defined by the portion 4b from the inner diameter side. In the retainer 4, the outer diameter surface and the inner diameter surface of the annular portion 4a and the column portion 4b are equal in diameter, and the annular portion 4a and the column portion 4b are formed to have the same thickness.

  As shown in FIGS. 3A and 3B, when the roller 3 is press-fitted into the pocket 5 of the cage 4 from the inner diameter side, the annular portion 4a of the cage 4 is connected to the raceway surface 1a of the outer ring 1. The roller 3 is press-fitted into the pocket 5 in a state where the roller 3 is pressed against the opening edge on the inner diameter side between the pillar portions 4b. The side surface of each column 4b is formed in an arc shape along the rolling surface of the roller 3, and the opening width on the inner diameter side between the columns 4b is the diameter of the roller 3 to prevent the roller 3 from falling off. It is formed slightly narrower than.

したがって、この円環部４ａの外径面から突出させたころ３の端部を、円環部４ａの外径面に沿わされる外輪１の鍔１ｂで軸方向へ案内しながら、ころ３をポケット５へ圧入することができ、ころ３の端部や鍔１ｂに擦過傷が生じないようにすることができる。 As shown in FIG. 3A, when the diameter of the roller 3 is d, the opening width on the inner diameter side of the pocket 5 is W, and the pitch circle diameter of these inner diameter side openings is Dpi, The outer diameter Do is formed so as to satisfy the range of the expression (1), and when the roller 3 is pressed against the opening edge between the column portions 4b, the roller 3 is more than the outer diameter surface of the annular portion 4a. Projecting to the outer diameter side.

Therefore, the roller 3 is guided while the end of the roller 3 protruding from the outer diameter surface of the annular portion 4a is guided in the axial direction by the flange 1b of the outer ring 1 along the outer diameter surface of the annular portion 4a. It can be press-fitted into the pocket 5, and it is possible to prevent the end of the roller 3 and the scissors 1b from being scratched.

  The diameter d of the roller 3 was 38 mm, the opening width W on the inner diameter side of the pocket 5 was 37.9 mm, and the pitch circle diameter Dpi of these inner diameter side openings was 255 mm. In this embodiment, the outer diameter Do of the annular portion is set to be less than 287.4 mm from the expression (1), so that the roller 3 pressed against the opening edge between the column portions 4b can be used as the outer diameter surface of the annular portion 4a. It can be made to protrude more.

  FIG. 4 shows a roller bearing using the roller bearing retainer 4 of the second embodiment. This roller bearing also has a plurality of rollers 3 held by a cage 4 between a raceway surface 1 a provided on the inner diameter surface of the outer ring 1 and a raceway surface 2 a provided on the outer diameter surface of the inner ring 2. There is a difference from the first embodiment in that flanges 2b for restricting the axial movement of the rollers 3 are provided on both sides of the raceway surface 2a of the inner ring 2.

  As shown in FIG. 5, the retainer 4 is formed by connecting two annular portions 4a spaced apart in the axial direction by a plurality of column portions 4b in the circumferential direction, and these annular portions 4a and the columns. The roller 3 is press-fitted into the pocket 5 defined by the portion 4b from the outer diameter side. Similar to the first embodiment, the outer diameter surface and the inner diameter surface of the annular portion 4a and the column portion 4b have the same diameter.

  As shown in FIGS. 6A and 6B, when the roller 3 is press-fitted into the pocket 5 of the cage 4 from the outer diameter side, the annular portion 4 a of the cage 4 is connected to the raceway surface of the inner ring 2. Set along the flanges 2b provided on both sides of 2a, and press the roller 3 into the pocket 5 in a state of pressing against the opening edge on the outer diameter side between the pillars 4b. As in the first embodiment, the side surface of each column portion 4b is formed in an arc shape along the rolling surface of the roller 3, and the opening width on the outer diameter side between the column portions 4b is the roller 3. In order to prevent the roller 3 from falling off, it is formed slightly narrower than the diameter of the roller 3.

したがって、この円環部４ａの内径面から突出させたころ３の端部を、円環部４ａの内径面に沿わされる内輪２の鍔２ｂで軸方向へ案内しながら、ころ３をポケット５へ圧入することができ、ころ３の端部や鍔２ｂに擦過傷が生じないようにすることができる。 As shown in FIG. 6 (a), when the diameter of the roller 3 is d, the opening width on the outer diameter side of the pocket 5 is W, and the pitch circle diameter of these outer diameter side openings is Dpo, the circular ring The inner diameter Di of the portion is formed so as to satisfy the range of the expression (2). When the roller 3 is pressed against the opening edge between the column portions 4b, the roller 3 is more than the inner diameter surface of the annular portion 4a. Also protrudes toward the inner diameter side.

Therefore, the roller 3 is inserted into the pocket 5 while the end of the roller 3 protruding from the inner surface of the annular portion 4a is guided in the axial direction by the flange 2b of the inner ring 2 along the inner surface of the annular portion 4a. It is possible to press-fit the roller 3 so that the end of the roller 3 and the flange 2b are not scratched.

  The diameter d of the roller 3 was 14 mm, the opening width W on the outer diameter side of the pocket 5 was 13.6 mm, and the pitch circle diameter Dpo of these outer diameter side openings was 93.5 mm. In this embodiment, the roller 3 pressed against the opening edge between the column parts 4b protrudes from the inner diameter surface of the annular part 4a by setting the inner diameter Di> 81.9 mm of the annular part from the formula (2). Can be made.

  In each of the embodiments described above, the outer diameter surface and the inner diameter surface of the annular portion and the column portion of the roller bearing retainer have the same diameter, but the outer diameter surface and the inner diameter surface of the annular portion and the column portion have different diameters. Also good. The roller bearing retainer according to the present invention can also be used for a double row roller bearing in which three or more ring portions are coupled by a column portion.

Vertical front view showing a roller bearing using the roller bearing cage of the first embodiment The perspective view which shows the holder | retainer of FIG. a is a transverse side view showing a state before the rollers are press-fitted into the pocket of the cage of FIG. 2, and b is a sectional view taken along line IIIb-IIIb of a Longitudinal front view showing a roller bearing using the roller bearing retainer of the second embodiment The perspective view which shows the holder | retainer of FIG. a is a transverse side view showing a state before the roller is press-fitted into the pocket of the cage in FIG. Sectional drawing explaining the geometrical relationship when press-fitting rollers into the cage pocket from the inner diameter side Sectional drawing explaining the geometrical relationship when pressing the roller into the cage pocket from the outer diameter side

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 1a, 2a Raceway surface 1b, 2b 鍔 3 Roller 4 Cage 4a Ring part 4b Pillar part 5 Pocket

Claims (4)

  A plurality of annularly spaced annular portions whose outer diameter surfaces run along the collar of the outer ring are joined by a plurality of pillars in the circumferential direction, and pockets defined by these annular parts and pillars are combined. In a roller bearing retainer in which a roller is press-fitted from an inner diameter side and an opening width between pillars on the inner diameter side of a pocket into which the roller is press-fitted is narrower than the diameter of the roller, the roller is inserted into the inner diameter of the pocket. A roller bearing retainer characterized in that when pressed against the opening edge between the column parts on the side, the roller protrudes from the outer diameter surface of the annular part. When the diameter of the roller is d, the opening width on the inner diameter side of the pocket is W, and the pitch circle diameter of the opening on the inner diameter side of the pocket is Dpi, the outer diameter Do of the annular portion is (1) The roller bearing retainer according to claim 1, wherein the roller bearing retainer is within the range of the formula.

  A plurality of annularly spaced annular parts whose inner diameter faces along the inner ring collar are joined by a plurality of pillars in the circumferential direction, and are externally attached to pockets defined by these annular parts and pillars. In a roller bearing cage in which a roller is press-fitted from the radial side, and an opening width between columns on the outer diameter side of the pocket into which the roller is press-fitted is narrower than the diameter of the roller, the roller is inserted into the pocket. A roller bearing retainer characterized in that when pressed against an opening edge between columns on the outer diameter side, the roller protrudes from the inner diameter surface of the annular portion. When the diameter of the roller is d, the opening width on the outer diameter side of the pocket is W, and the pitch circle diameter of the opening on the outer diameter side of the pocket is Dpo, the inner diameter Di of the annular portion is (2 The roller bearing retainer according to claim 3, which is in the range of the formula.

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