JP2009299899A - Shell-type roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shell-type roller bearing easily manufactured and having good assembling performance, large strength and a long service life. <P>SOLUTION: In the shell-type roller bearing, a cage 10 in which rollers 5 are fitted into pockets provided in the circumferential direction is incorporated in an outer ring 1. The cage 10 is formed by providing a plurality of projecting parts 14a, 14b protruded outwardly by caulking at approximately even intervals in both edge parts of a cylindrical body comprising a steel plate. The projecting parts 14a, 14b are formed so that the tip parts are located in approximately the same position as that of an edge part 13a of the outer ring 1 or in a position outwardly from the edge part 13a when incorporated into the outer ring 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shell-type roller bearing, and more particularly to the structure of a cage of a shell-type roller bearing.

Solid type bearings have been used in the past for electrical accessories such as automotive starters and car cooler compressors, and automatic transmissions. However, due to cost problems, shell type roller bearings are often used in recent years. .
In such a shell-shaped roller bearing, a plurality of axially opposite ends of the cylindrical body are bent radially inward over the entire circumference to form a flange portion, and a plurality of the entire circumference is provided. Needle rollers are arranged, and these needle rollers are rotatably supported by a window hole of a cage having a window hole provided at equal intervals in the circumferential direction and inserted in the outer ring. Yes (see, for example, Patent Document 1).

Japanese Patent No. 3073937 (page 1-2, Fig. 1-2)

  In the shell-type roller bearing of Patent Document 1, one end edge portion of a cylindrical body is bent in the radial direction to form a collar portion, and the needle roller is fitted into the window hole from the other end edge portion. After the cage is inserted, the other end edge is bent in the radial direction to form a flange to restrict the movement of the cage in the axial direction, but the flange extends over the entire circumference of the outer ring by drawing. Therefore, there is a problem that a volume change occurs during processing, and thus wrinkles are generated or cracks or cracks are easily generated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a shell-type roller bearing that is easy to manufacture and has good assemblability.

  The present invention provides a shell-type roller bearing in which an outer ring is assembled with a cage in which rollers are fitted in pockets provided in a circumferential direction, and the cage is attached to both end edges of a cylindrical body made of a steel plate. A plurality of projecting portions projecting outward by processing are provided at substantially equal intervals.

  In the above-described shell-type roller bearing, the protruding portion has a tip end portion substantially equal to an end edge portion of the outer ring when the retainer is incorporated in the outer ring or positioned outward from the end edge portion. Formed.

  According to the present invention, a cage is formed by providing protrusions outwardly by caulking at substantially equal intervals on both end edges of the cylindrical body without providing flanges over the entire circumference of both end edges of the outer ring. Since the protrusions restrict the movement of the cage in the axial direction, it is possible to obtain a shell-type roller bearing that is easy to manufacture and easy to assemble.

It is a front view of the shell type roller bearing which concerns on Embodiment 1 of this invention. It is AA sectional drawing of FIG. It is a perspective view of the outer ring | wheel and holder | retainer of FIG. It is a front view of the shell type roller bearing which concerns on Embodiment 2 of this invention. It is BB sectional drawing of FIG. It is a perspective view of the outer ring | wheel and holder | retainer of FIG.

[Embodiment 1]
1 is a front view of a shell-type roller bearing according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a perspective view of an outer ring and a cage of FIG.
In the figure, reference numeral 1 denotes an outer ring. For example, both end edges 3a and 3b in the axial direction of the cylindrical body 2 obtained by carburizing, quenching, and tempering a low carbon steel plate are caulked at substantially equal intervals toward the center. Protruding protrusions 4a and 4b, 4c and 4d are provided.

Reference numeral 5 denotes a roller in which a needle-shaped steel material is heat-treated and is rotatably arranged at equal intervals along the inner wall surface of the outer ring 1.
Reference numeral 10 denotes an elastic retainer obtained by heat-treating a cylindrical body 11 made of a steel plate. The outer diameter D ₁ is smaller than the inner diameter d of the outer ring 1, and the axial length L ₁ is the axial length of the outer ring 1. It is shorter than the length L. Further, a plurality of window holes (pockets) 12 are provided at equal intervals in the circumferential direction, and the axial length of the pocket 12 is slightly longer than the length of the rollers 5, and the circumferential width is the width of the rollers 5. It is formed slightly smaller than the outer diameter.

The distance H between the tip portion of the protruding portion 4a and 4b, 4c and 4d of the outer ring 1 is substantially equal to or narrower than forming the inner diameter d ₁ of the retainer 10. In other words, when the retainer 10 in which the rollers are fitted in the pocket 12 is assembled in the outer ring 1, the tips of the protrusions 4 a and 4 b, 4 c and 4 d are substantially the same as the both end edges 13 a and 13 b of the retainer 10. They are at the same position or slightly closer to the center.

Next, an example of a manufacturing procedure of the shell roller bearing configured as described above will be described.
First, the center part is formed by caulking at the equally spaced positions (the positions facing each other at an interval of 180 ° in the figure) of both end edges 3a and 3b in the axial direction of the cylindrical body 2 made of a low carbon steel plate. After forming projecting portions 4a and 4b, 4c and 4d projecting to the side, the whole is heat-treated to constitute the outer ring 1.

Next, the rollers 5 are respectively inserted into the pockets 12 of the cage 10, the cage 10 is elastically deformed so as not to interfere with the protrusions 4 a to 4 d of the outer ring 1, and from one end (opening) of the outer ring 1. , Inserted between the protrusions 4a, 4b (or 4c, 4d) into the outer ring 1 and assembled. When the cage 10 is assembled at a predetermined position, it returns to its original state, and each roller 5 abuts against the inner wall surface of the outer ring 1 and is rotatably supported by the cage 10.
At this time, both end edges 13a and 13b in the axial direction of the retainer 10 are positioned in contact with or close to the inner walls of the protrusions 4a to 4d of the outer ring 1, and thus the movement in the axial direction is restricted. The vessel 10 does not come off or fall off.

In the above description, the case where the outer ring 1 is configured by heat treatment after the protrusions 4a to 4d are formed on both edge portions 3a and 3b of the cylindrical body 2 by caulking is shown. First, the cylindrical body 2 is heat treated. After that, the vicinity of the position where the protrusions 4a to 4d are formed may be made into a non-hardened part by, for example, induction annealing, and the non-hardened part may be crimped to form the protrusions 4a to 4d.
Further, when the cylindrical body 2 is heat-treated, for example, when quenching is performed at a position to be caulked by carburizing, a non-cured portion is provided in advance by performing a carbon-proof treatment, and the non-cured portion is caulked after the heat treatment. The protrusions 4a to 4d may be formed by processing.

  According to the present embodiment, the protrusions 4a and 4b that hold the retainer 10 by caulking at equal intervals between both end edges 3a and 3b of the cylindrical body 2 without providing flanges at both end edges of the outer ring. Since the outer ring 1 is configured by providing 4c and 4d, it is easy to manufacture and is easy to assemble. In addition, it does not wrinkle or crack or crack as in the conventional case. A long and long-life shell roller bearing can be obtained.

[Embodiment 2]
4 is a front view of a shell-type roller bearing according to Embodiment 2 of the present invention, FIG. 5 is a sectional view taken along line BB in FIG. 4, and FIG. 6 is a perspective view of the outer ring and the cage in FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first embodiment, the case where the outer ring 1 is configured by providing the projecting portions 4a to 4d facing the central portion direction by caulking at both end edge portions 3a and 3b of the cylindrical body 2 is shown. In FIG. 6, the outer ring 1 is not processed as the heat treated cylinder 2, and the cylindrical body 11 constituting the cage 10 is substantially equal to both end edges 13 a and 13 b in the axial direction as shown in FIG. 6. The retainer 10 is configured by providing protrusions 14a and 14b and 14c and 14d that protrude toward the outside (on the opposite side to the center part) by caulking at the position of the interval.

The cage 10 according to the present embodiment is formed such that the axial length L ₁ is longer than the axial length L of the outer ring 1, and the tips of the projecting portions 14 a and 14 b and 14 c and 14 d of the cage 10. The interval H ₁ between the parts is formed to be approximately equal to or larger than the outer diameter D of the outer ring 1. In other words, when the cage 10 in which the rollers 5 are fitted in the pocket 12 is assembled into the outer ring 1, the tip ends of the protrusions 14 a to 14 d are in positions substantially equal to the both end edges 3 a and 3 b of the outer ring 1. Or slightly outside.

  In the manufacture of the shell roller bearing according to the present embodiment, first, both end edges 13a and 13b in the axial direction of the cylindrical body 11 made of a steel plate and provided with the pockets 12 are respectively directed outward by caulking. The projecting portions 14a and 14b, 14c and 14d are formed, and then the cylindrical body 11 is heat-treated to constitute the retainer 10 having elasticity. Also in the present embodiment, as in the case of the first embodiment, non-hardened portions are formed at predetermined positions on both end edges 13a and 13b of the cylindrical body 11 provided with the pocket 12 and heat-treated. The protrusions 14a to 14d may be formed on the non-cured portion by caulking.

Then, the roller 5 is inserted into the pocket 12 of the cage 10, and the cage 10 is inserted from one opening of the outer ring 1 while being elastically deformed so that the protruding portions 14 a to 14 d do not interfere with the inner wall of the outer ring 1. Incorporate into the outer ring 1. When assembled in a predetermined position, the cage 10 returns to its original state, and the rollers 5 abut against the inner wall surface of the outer ring 1 and are rotatably supported by the cage 10.
At this time, the outer ring 1 is positioned between the protrusions 14a and 14c, 14b and 14d of the retainer 10, and the edge portions 3a and 3b abut against or be held close to the protrusions 14a to 14d. Since the movement of 10 in the axial direction is restricted, there is no possibility that the cage 10 comes off from the outer ring 1 or falls off.
Also in the present embodiment, substantially the same effect as in the first embodiment can be obtained.

  In the above description, the case where the protrusions 4a to 4d or 14a to 14d are provided at two locations at almost equal intervals on the edge portions 3a, 3b, 13a, and 13b of the outer ring 1 or the cage 10 is shown. You may provide 4a-4d or 14a-14d in three or more places at substantially equal intervals. However, if too many protrusions 4a to 4d or 14a to 14d are provided, it is difficult to incorporate the protrusions 4a to 4d or 14a to 14d into the outer ring 1, and therefore it is desirable to set them appropriately.

  DESCRIPTION OF SYMBOLS 1 Outer ring, 2 Cylindrical body, 3a, 3b End edge part, 4a, 4b Protruding part by caulking process, 5 Roller, 10 Cage, 11 Cylindrical body, 12 Pocket, 13a, 13b End edge part, 14a, 14b By caulking process Protrusion.

Claims (2)

In the shell-type roller bearing in which the outer ring is assembled with a cage in which rollers are inserted into pockets provided in the circumferential direction,
A shell-type roller bearing in which the retainer is formed by providing a plurality of projecting portions projecting outward by caulking at both end edges of a cylindrical body made of a steel plate at substantially equal intervals.   The protruding portion is formed such that a tip portion thereof is substantially equal to an end edge portion of the outer ring or positioned outward from the end edge portion when the retainer is incorporated in the outer ring. The shell-type roller bearing according to claim 1.

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