JP6558041B2 - Roller bearing cage and roller bearing - Google Patents

Description

  The present invention relates to a roller bearing retainer that holds a roller in a rollable manner, and a roller bearing.

  Conventionally, a pair of annular parts provided with a pair of annular parts opposed to each other in the axial direction and a plurality of pillars that are provided apart from each other in the circumferential direction of the annular part and connect the pair of annular parts 2. Description of the Related Art A roller bearing retainer is known in which a roller is rotatably held in a holding hole surrounded by a portion and an adjacent column portion (see, for example, Patent Document 1).

  In the roller bearing retainer of Patent Document 1, the column portion includes a large-diameter portion disposed at both axial end portions, and a small-diameter portion having a smaller outer diameter than the large-diameter portion disposed at the central portion in the axial direction. And a connecting portion that connects the small-diameter portion and the large-diameter portion, and is formed in a substantially M shape in a cross-sectional view perpendicular to the circumferential direction as a whole.

  In the roller bearing retainer of Patent Document 1, the distance between the large diameter portions of the adjacent column portions is formed so as to be narrower toward the radially outer side, thereby restricting the movement of the roller to the radially outer side. It is configured as follows. Further, in the roller bearing cage of Patent Document 1, the interval between the small diameter portions of the adjacent column portions is formed so as to be narrower toward the radially inner side, thereby restricting the movement of the roller inward in the radial direction. It is configured as follows.

  A roller bearing using such a roller bearing retainer is attached, for example, between a shaft and a gear in a vehicle transmission, and is used to smoothly rotate the shaft and the gear.

JP 2009-156337 A

  However, in the above-described roller bearing, when the roller bearing is rotated at a high speed, for example, when the vehicle is operated at a high speed, the central portion of the column portion of the roller bearing retainer is deflected radially outward by the centrifugal force (bow). There was a risk that the center part of the pillar part would come into contact with the roller and the lubricity deteriorated, resulting in wear.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a roller bearing retainer and a roller bearing that can suppress deformation of a column portion during high-speed rotation and suppress the occurrence of wear.

In order to achieve the above-mentioned object, the present invention provides a pair of annular portions arranged opposite to each other in the axial direction, and a plurality of annular portions that are provided apart from each other in the circumferential direction of the annular portion and connect the pair of annular portions. A roller bearing retainer that holds the roller in a rollable manner in a holding hole surrounded by the pair of annular portions and the column portion adjacent to the pair of annular portions. A large-diameter portion disposed at both axial ends, a small-diameter portion having an outer diameter smaller than that of the large-diameter portion disposed at the central portion in the axial direction, and a connection that connects the small-diameter portion and the large-diameter portion. And a beam portion that reinforces the small-diameter portion, and the beam portion protrudes radially outward from the outer peripheral surface of the small-diameter portion, and is formed along the axial direction. The small-diameter portion and the beam Provided is a roller bearing retainer in which a radial thickness of the pillar portion combined with a portion is larger than a radial thickness of the large diameter portion .

In order to achieve the above object, the present invention is a roller bearing comprising a roller and a roller bearing retainer that holds the roller in a rollable manner, and the roller bearing retainer includes: A pair of circular portions disposed opposite to each other in the axial direction; and a plurality of column portions that are provided apart from each other in the circumferential direction of the circular portion and connect the pair of circular portions, and the pair of circles The roller is configured to be able to roll in a holding hole surrounded by the ring portion and the column portion adjacent to the ring portion, and the column portion includes a large-diameter portion disposed at both ends in the axial direction, and a shaft A small-diameter portion having an outer diameter smaller than the large-diameter portion disposed in the central portion in the direction, a connecting portion that connects the small-diameter portion and the large-diameter portion, and a beam portion that reinforces the small-diameter portion. , the beam portion, the is formed along the axial direction and protrudes from the outer peripheral surface of the small diameter portion radially outward, and the small diameter portion and the beam portion The thickness of the combined radial direction of the pillar portion, said thicker than the radial thickness of the large diameter portion, to provide a roller bearing.

  According to the present invention, it is possible to provide a roller bearing retainer and a roller bearing capable of suppressing deformation of a column portion during high-speed rotation and suppressing occurrence of wear.

It is a perspective view which shows the roller bearing retainer which concerns on this Embodiment. It is a top view which shows the holding | maintenance state of the roller in the roller bearing retainer of FIG. It is sectional drawing which shows the holding | maintenance state of the roller in the roller bearing retainer of FIG. (A) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of (a). It is sectional drawing of the cage for roller bearings which concerns on one modification of this invention.

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

(Overall configuration of roller bearing cage)
FIG. 1 is a perspective view in which a part of a roller bearing retainer according to the present embodiment is broken.

  As shown in FIG. 1, the roller bearing retainer 1 is provided with a pair of annular portions 2 and 3 that are opposed to each other in the axial direction, and spaced apart in the circumferential direction of the annular portions 2 and 3. A plurality of pillars 4 that connect the annular parts 2 and 3 are integrally provided, and the rollers can roll in the holding holes 5 surrounded by the pair of annular parts 2 and 3 and the neighboring pillars 4. Configured to hold. The roller bearing cage 1 is made of a metal such as iron or a resin such as 66 nylon or 46 nylon.

  The pair of annular portions 2 and 3 are arranged in parallel with each other at a predetermined interval in the axial direction, and are arranged at both axial ends of the roller bearing retainer 1.

  The plurality of column portions 4 are arranged in parallel at equal intervals along the circumferential direction of the annular portions 2 and 3. The column portion 4 is formed integrally with the annular portions 2 and 3, and is configured to connect the outer peripheral edge portions of the annular portions 2 and 3.

  The column part 4 includes two large-diameter parts 4a arranged at both ends in the axial direction, one small-diameter part 4b having a smaller outer diameter than the large-diameter part 4a arranged in the central part in the axial direction, and a small-diameter part. 4b and the large-diameter portion 4a, and two connecting portions 4c that connect the large-diameter portion 4a. As a whole, the connecting portions 4c are formed in a substantially M shape in a cross-sectional view perpendicular to the circumferential direction.

  The large-diameter portion 4a has an outer diameter that is equal to the outer diameter of the annular portions 2 and 3, and is formed parallel to the axial direction. One end of the large diameter portion 4a is connected to the annular portions 2 and 3, and the other end of the large diameter portion 4a is connected to the connection portion 4c. In addition, the length along the axial direction of the two large diameter parts 4a is made equal.

  The small-diameter portion 4b is formed so that its inner and outer diameters are smaller than the inner and outer diameters of the large-diameter portion 4a, and is formed parallel to the axial direction. The small diameter portion 4 b is disposed at the central portion in the axial direction of the column portion 4.

  One end of the connecting portion 4c is connected to the large diameter portion 4a, and the other end is connected to the small diameter portion 4b. The connecting portion 4c is formed so as to be inclined with respect to the axial direction so that the inner and outer diameters become smaller as it approaches the small diameter portion 4b.

  The large-diameter portion 4a, the small-diameter portion 4b, and the connecting portion 4c are formed to have substantially the same width and thickness along the circumferential direction. Moreover, the large diameter part 4a, the small diameter part 4b, and the connection part 4c are formed in the circular arc shape along the circumferential direction in the cross section perpendicular | vertical to an axial direction.

(Description of structure to hold the rollers)
FIG. 2 is a plan view showing a holding state of the roller 6 in the roller bearing retainer 1, and FIG. 3 is a cross-sectional view thereof.

  As shown in FIGS. 2 and 3, in this embodiment, a cylindrical needle roller is used as the roller 6. The roller bearing 100 according to the present embodiment is one in which the roller 6 is accommodated in the holding hole 5 of the roller bearing cage 1. For example, the roller bearing 100 is attached between a shaft and a gear in a vehicle transmission, and is used to smoothly rotate the shaft and the gear.

  The large-diameter portion 4a is integrally formed with a claw portion 7 that projects into the holding hole 5 from both side surfaces in the circumferential direction. The claw portions 7 protruding from both side surfaces of the large diameter portion 4 a are formed at the same position in the axial direction, and are formed so that the claw portions 7 of the adjacent large diameter portions 4 a face each other in the holding hole 5. Claw portions 7 are formed on the two large diameter portions 4 a constituting the column portion 4, and the claw portions 7 are opposed to each other at two locations in the holding hole 5 in the axial direction.

  The distance d1 between the claw portions 7 facing each other in the holding hole 5 is set to be smaller than the outer diameter D of the roller 6. With this configuration, the claw portion 7 restricts the movement of the roller 6 to the radially outer side. Here, the claw portion 7 restricts the movement of the roller 6 outward in the radial direction. However, for example, the large diameter portion 4a is set so that the distance between the adjacent large diameter portions 4a becomes narrower toward the radially outer side. It may be configured to restrict the movement of the roller 6 outward in the radial direction on the side surface of the large diameter portion 4a.

Moreover, in this Embodiment, it is comprised so that the distance between the adjacent small diameter parts 4b may become narrow toward the radial direction inner side. The shortest distance between the adjacent small diameter portions 4 b, that is, the distance d 2 between the adjacent small diameter portions 4 b at the radially inner end is set to be smaller than the outer diameter D of the roller 6. With such a configuration, the side surface in the circumferential direction of the small diameter portion 4b, the roller movement 6 to the radial inner side of is restricted. Here, although so as to restrict the movement of the radial inner side of the roller 6 by the side of the small diameter portion 4b, for example, to form a claw portion projecting from both sides of the small diameter portion 4b in the holding hole 5 , it may be configured to restrict the movement of the radial inner side of the roller 6 by the claw portion.

(Description of beam)
4A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A.

  As shown in FIGS. 1 and 4, the roller bearing retainer 1 is provided on the outer peripheral surface S of the small-diameter portion 4 b of the column portion 4 along the axial direction and protrudes radially outward from the outer peripheral surface S. 8 is further provided.

  The beam portion 8 reinforces the column portion 4 to suppress deformation at high speed rotation, and at least the central portion of the column portion 4 that is likely to be deformed at high speed rotation, that is, the outer peripheral surface S of the small diameter portion 4b. It is provided along. The beam portion 8 is formed in a rectangular shape in a cross-sectional view perpendicular to the axial direction.

  Although it is possible to suppress the deformation of the column part 4 at high speed rotation by simply increasing the thickness of the small diameter part 4b, in this case, the thickened part increases and the roller bearing retainer 1 as a whole increases. Mass will increase. By providing the beam portion 8 as in the present embodiment, deformation at high speed rotation can be suppressed with a minimum increase in thickness, and the roller bearing cage 1 that is lightweight and suitable for high speed rotation applications can be realized. .

  The thickness (height) along the radial direction of the beam portion 8 and the width along the circumferential direction take into consideration the material of the roller bearing retainer 1, the strength of the column portion 4, the rotational speed during use, and the like. The thickness and the width are set so that the deformation of the column part 4 can be sufficiently suppressed during use. In the present embodiment, the width of the beam portion 8 is set to about 1/3 of the width of the column portion 4. In addition, since it will lead to the increase in mass when the width | variety of the beam part 8 is too large, it is desirable that the width | variety of the beam part 8 shall be 1/2 or less of the width | variety of the column part 4. FIG.

  In this Embodiment, in order to suppress the deformation | transformation of the column part 4 at the time of high speed rotation, the beam part 8 is formed so that it may continue over the small diameter part 4b and the connection part 4c. The beam portion 8 is formed at a central portion in the circumferential direction of the small diameter portion 4b and the connecting portion 4c.

  In the present embodiment, one beam portion 8 is formed, but a plurality of beam portions 8 may be formed. In this case, a plurality of beam portions 8 may be formed in parallel along the axial direction. The cross-sectional shape of the beam portion 8 is not limited to a rectangular shape, and may be an arbitrary shape such as a semicircular shape.

  If the beam portion 8 is protruded radially outward from the large-diameter portion 4a, the beam portion 8 may interfere with surrounding members and wear may occur. Therefore, the beam portion 8 is connected to the small-diameter portion 4b. It is formed in a trapezoidal space surrounded by the portion 4c. Although it is conceivable to form the beam portion 8 on the inner peripheral surface of the small-diameter portion 4b, in this case, the beam portion 8 interferes with a member such as a shaft inserted through the annular portions 2 and 3, and wear occurs. This is not preferable. However, it is possible to further increase the strength of the column portion 4 by providing a beam portion on the inner peripheral surface of the connecting portion 4c so as not to protrude radially inward from the inner peripheral surface of the small diameter portion 4b.

  Further, as shown in FIG. 5, the beam portion 8 may be formed so as to fill the entire trapezoidal space surrounded by the small diameter portion 4b and the connecting portion 4c. In this case, the outer diameter of the beam portion 8 is equal to the outer diameter of the large diameter portion 4a and the annular portions 2 and 3. Thereby, the strength of the column part 4 can be further improved, and the deformation of the column part 4 during high-speed rotation can be further suppressed.

(Operation and effect of the embodiment)
As described above, in the roller bearing retainer 1 according to the present embodiment, the beam portion 8 provided along the axial direction on the outer peripheral surface S of the small diameter portion 4b and projecting radially outward from the outer peripheral surface S is provided. I have.

  By providing the beam portion 8, it becomes possible to reinforce the central portion of the column portion 4 that is easily deformed during high-speed rotation, that is, the small-diameter portion 4 b, thereby suppressing deformation of the column portion 4 during high-speed rotation. It is possible to suppress the occurrence of wear due to deformation. Moreover, by providing the beam part 8, the weight reduction is possible compared with the case where the whole pillar part 4 is thickened, and the roller bearing retainer 1 that is lightweight and suitable for high-speed rotation can be realized.

  Moreover, in this Embodiment, since the beam part 8 was formed over the small diameter part 4b and the connection part 4c, it becomes possible to suppress the deformation | transformation at the time of the high speed rotation of the pillar part 4 more.

  Furthermore, in the present embodiment, since the beam portion 8 is formed in the space surrounded by the small diameter portion 4b and the connecting portion 4c, it is possible to prevent the beam portion 8 from interfering with surrounding members and causing wear. it can.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  Further, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention. For example, in the above embodiment, the material of the beam portion 8 is not mentioned, but the beam portion 8 does not have to be made of the same material as the column portion 4 and may be made of a material different from that of the column portion 4. Good. For example, when the roller bearing cage 1 including the column part 4 is made of resin, the beam part 8 made of metal such as iron may be provided.

DESCRIPTION OF SYMBOLS 1 ... Roller bearing cage, 2, 3 ... Ring part, 4 ... Column part, 4a ... Large diameter part, 4b ... Small diameter part, 4c ... Connection part, 5 ... Holding hole, 6 ... Roller, 7 ... Claw part , 8 ... Beam part, 100 ... Roller bearing, S ... Outer peripheral surface

Claims (6)

A pair of circular portions disposed opposite to each other in the axial direction; and a plurality of column portions that are provided apart from each other in the circumferential direction of the circular portion and connect the pair of circular portions, and the pair of circles A roller bearing retainer that holds a roller in a rollable manner in a holding hole surrounded by the ring portion and the column portion adjacent to the ring portion,
The column part includes a large-diameter part disposed at both axial end parts, a small-diameter part having an outer diameter smaller than the large-diameter part disposed in the central part in the axial direction, the small-diameter part, and the large-diameter part. And a beam portion for reinforcing the small diameter portion ,
The beam portion protrudes radially outward from the outer peripheral surface of the small-diameter portion and is formed along the axial direction.
The radial thickness of the small diameter portion and the beam portion combined is thicker than the radial thickness of the large diameter portion,
Roller bearing cage.   The large-diameter portion and the small-diameter portion are formed so that the radial thickness is substantially the same.
  The roller bearing retainer according to claim 1.   The width of the beam portion along the circumferential direction is ½ or less of the width of the small diameter portion,
  The roller bearing retainer according to claim 1 or 2. The beam portion is formed across the small diameter portion and the connecting portion.
The roller bearing retainer according to any one of claims 1 to 3 . The beam portion is formed in a space surrounded by the small diameter portion and the connecting portion.
The cage for roller bearings according to any one of claims 1 to 4 . A roller bearing comprising a roller and a roller bearing retainer that holds the roller in a rollable manner,
The roller bearing cage is:
A pair of circular portions disposed opposite to each other in the axial direction; and a plurality of column portions that are provided apart from each other in the circumferential direction of the circular portion and connect the pair of circular portions, and the pair of circles It is configured to hold the roller in a rollable manner in a holding hole surrounded by the ring portion and the column portion adjacent to the ring portion,
The column part includes a large-diameter part disposed at both axial end parts, a small-diameter part having an outer diameter smaller than the large-diameter part disposed in the central part in the axial direction, the small-diameter part, and the large-diameter part. And a beam portion for reinforcing the small diameter portion ,
The beam portion protrudes radially outward from the outer peripheral surface of the small-diameter portion and is formed along the axial direction.
The radial thickness of the small diameter portion and the beam portion combined is thicker than the radial thickness of the large diameter portion ,
Roller bearing.

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