JPH0741065U - Cage for separate type angular contact ball bearing - Google Patents

Abstract

(57) [Summary] [Purpose] With either the inner ring 1 or the outer ring 2 separated,
Provided is a cage structure in which the other race, the ball 3, and the cage 5 are integrally assembled. [Structure] The cage 5 has an annular portion 7 on both sides in the axial direction and column portions 8 on both sides in the circumferential direction that partition the pockets. The inner diameter of the annular portion 7 is guided to the outer diameter surface of the inner ring 1. The column portion 8 extends continuously from the annular portions 7 on both sides in the axial direction in the outer diameter side inclining direction and beyond the pitch circle P of the ball 3 arranged on the raceway surface of the inner ring 1.
And an axial direction portion 8b that connects the inclined portions 8a in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cage of a separable angular ball bearing in which an inner ring or an outer ring can be separated.

[0002]

[Prior art]

 For example, tapered roller bearings are mainly used on the diff side of automobiles, but angular ball bearings as shown in FIG. 6 may be used to reduce friction. Angular contact ball bearings are used because they have a larger number of balls to accommodate than deep groove ball bearings and allow a large distance between operating points, which is advantageous in terms of load capacity and rigidity.

On the other hand, in tapered roller bearings, the outer ring can be separated, and usually the peripheral portion of the bearing is also designed on the premise of this, so the separate type of angular contact ball bearings is not used. Therefore, there is a possibility that the bearing cannot be assembled.

[0004]

[Problems to be solved by the device]

 By the way, in the case of a tapered roller bearing, the inner ring, the rollers and the retainer become an integrated assembly with the outer ring separated, but in the case of the angular ball bearing, if the outer ring 12 is separated as shown in FIG. , The inner ring 11, the balls 13, and the cage 15 are separated. This is because when the ball 13 is pressed against the wall surface of the pocket of the cage 15 with the outer ring 12 separated (when the ball 13 is moved to the outer diameter side by the pocket gap), the inscribed circle diameter F of the ball 13 is Is larger than the diameter E of the outer diameter surface of the inner ring 11, and the ball 13 comes off the inner ring 11. Therefore, compared to the case of using tapered roller bearings, there is a concern that the number of assembly steps will increase and the parts management will be troublesome. In this case, as shown in FIG. 7, there is a structure in which the machined cage 15 is used and the outer diameter portion A is caulked from both sides to prevent the balls 13 from falling off, but caulking work is separately required. Therefore, it is not economical and is not suitable for mass production.

In view of the above, the present invention provides a cage structure in which one of the inner ring and the outer ring is separated, and the other ring, the ball, and the cage are integrated, and the economy and mass productivity are excellent. It is the one we are trying to provide.

[0006]

[Means for Solving the Problems]

 The retainer of the present invention is a retainer incorporated in a separable angular ball bearing whose outer ring is separable. In the retainer, a plurality of pockets for accommodating balls are formed at equal intervals around the circumference, and both sides in the axial direction of the pocket are the inner ring. An annular part that is guided by the outer diameter surface of the, and a column part that separates the pockets on both sides in the circumferential direction. The minimum distance between the inclined part that extends in the inclination direction and beyond the pitch circle of the ball arranged on the raceway surface of the inner ring and the inclined part that is continuous in the axial direction and that faces each other in the circumferential direction. Is an axial portion smaller than the diameter of the ball, and the inscribed circle diameter of the ball in contact with the axial portion is smaller than the outer diameter surface of the inner ring.

The retainer of the present invention is a retainer in which an inner ring is incorporated in a separable angular ball bearing, in which a plurality of pockets for accommodating balls are formed at equal intervals around the circumference, and both sides of the pocket in the axial direction are formed. Is an annular part that is guided by the inner diameter surface of the outer ring, and both sides in the circumferential direction are pillars that partition between the pockets. Direction, and the slope between the ball and the pitch circle of the ball arranged on the raceway of the outer ring, and the minimum distance between the slopes that are continuous in the axial direction and that face each other in the circumferential direction. It consists of an axial portion whose distance is smaller than the diameter of the ball, and the circumscribed circle diameter of the ball in contact with the axial portion is larger than the inner diameter surface of the outer ring.

[0008]

[Action]

 The minimum distance between circumferentially opposed axial portions is less than the diameter of the ball. Therefore, in the type in which the outer ring is separable, when the ball is moved to the outer diameter side by the pocket gap, the ball comes into contact with and engages in the axial direction, thereby preventing the ball from falling off the retainer. The diameter of the inscribed circle of the ball at this time is smaller than the diameter of the outer diameter surface of the inner ring, so that the ball cannot come off from the inner ring. As a result, the inner ring, balls, and cage are integrated into a unit with the outer ring separated.

In the type in which the inner ring is separable, when the ball is moved toward the inner diameter side by the pocket gap, the ball comes into contact with and engages with the axial direction portion, thereby preventing the ball from falling off the retainer. The circumscribed circle diameter of the ball at this time is larger than the diameter of the inner diameter surface of the outer ring, so that the ball cannot come off the outer ring. As described above, the outer ring, the ball and the cage are integrated into a unit with the inner ring separated.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The angular ball bearing shown in FIG. 1 includes an inner ring 1, an outer ring 2, a plurality of balls 3 interposed between the inner and outer rings 1, 2 and an annular cage 5 for holding the balls 3 at equal intervals around the circumference. As shown in the figure, the inner ring 1, the ball 3 and the cage 5 are a single assembly with the outer ring 2 separated.

A plurality of pockets 6 (see FIG. 2) are formed in the cage 5 at equal intervals around the circumference, and the balls 3 are accommodated in the pocket 6 so as to be rollable with a predetermined pocket clearance. The cage 5 is, for example, press-molded from an annular steel plate material, and as shown in FIG. 2, the pocket 6 has an annular portion 7 on both sides in the axial direction and a column portion that partitions the pockets 6 on both sides in the circumferential direction. It is 8. The inner diameter of the annular portion 7 is guided to the outer diameter surface of the inner ring 1. The column portion 8 has an inclined portion 8a extending continuously from the annular portions 7 on both sides in the axial direction in the outer diameter side inclination direction and beyond the pitch circle P of the ball 3 arranged on the raceway surface of the inner ring 1. , And an axial portion 8b that connects the inclined portions 8a to each other in the axial direction, and the longitudinal section thereof has a substantially trapezoidal shape.

The diameter of the pocket 6 in the annular portion 7 and the inclined portion 8a is larger than the diameter D 0 of the ball 3 by the pocket gap (both sides) (D1> D0), and in the axial portion 8b, It is slightly smaller than the diameter D0 of the ball 3 (D2 <D0). Therefore, as shown in FIG. 3, when the ball 3 is moved to the outer diameter side by the pocket gap, the ball 3 comes into contact with and engages with the axial portion 8b, which prevents the ball 3 from falling off the retainer 5. . The inscribed circle diameter F of the ball 3 at this time is smaller than the diameter E of the outer diameter surface of the inner ring 1, so that the ball 3 is prevented from coming off the inner ring 1. As described above, the inner ring 1, the ball 3, and the cage 5 are integrated into an assembly with the outer ring 2 separated. In this assembly, after the cage 5 is set on the inner ring 1, the ball 3 is pressed from the outer diameter side to the axial portion 8b, and the axial portion 8b is elastically expanded in the circumferential direction to form a pocket. It is housed in 6.

The angular ball bearing shown in FIG. 4 has a basic structure similar to that described above, but with the inner ring 1 separated, the assembly of the outer ring 2, the ball 3, and the cage 5 is integrated. It will be. The outer diameter of the annular portion 7 of the cage 5 is set in the inner diameter surface of the outer ring 2. Further, the pillar portion 8 of the cage 5 extends continuously from the annular portions 7 on both sides in the axial direction in the inclining direction on the inner diameter side and beyond the pitch circle P 1 of the balls 3 arranged on the raceway surface of the outer ring 2. The inclined portion 8a and the axial portion 8b that connects the inclined portions 8a in the axial direction. As shown in FIG. 5, when the ball 3 is moved toward the inner diameter side by the gap between the pockets, the ball 3 comes into contact with and engages with the axial portion 8b, which prevents the ball 3 from falling off the cage 5. The circumscribed circle diameter H of the ball 3 at this time is larger than the diameter G of the inner diameter surface of the outer ring 2, so that the ball 3 is prevented from coming off the outer ring 2. As described above, the outer ring 2, the ball 3, and the cage 5 are integrated into an assembly with the inner ring 1 separated. In this assembly, after the cage 5 is set on the outer ring 2, the ball 3 is pressed from the inner diameter side to the axial direction portion 8b, and the axial direction portion 8b is elastically expanded in the circumferential direction to form a pocket. It is housed in 6.

In the cage 5 ′ shown in FIG. 8, the diameter of the pocket 6 is larger than the diameter D 0 of the ball 3 by the pocket gap (both sides) for the annular portion 7, the inclined portion 8 a, and the axial portion 8 b ( D1> D0), and the projection 8b1 is provided on the wall surface of the axial portion 8b. The distance D2 between the protrusions 8b1 facing each other in the circumferential direction is smaller than the diameter D0 of the ball 3. Therefore, when the ball 3 is moved toward the inner diameter side by the gap between the pockets, the ball 3 comes into contact with and engages with the protrusion 8b1. Other configurations and effects are similar to those of the cage 5 described above, and in the same manner as the cage 5, the invention can be applied to both the inner ring separated type and outer ring separated type angular contact ball bearings.

[0016]

[Effect of device]

 As described above, according to the cage of the present invention, in the type in which the outer ring is separable, the inscribed circle diameter of the ball when the outer ring is in contact with the axial direction is the outer diameter surface of the inner ring. Since the diameter is smaller than the diameter, the inner ring, balls, and cage become an integrated assembly with the outer ring separated. When the inner ring is separable, the circumscribed circle diameter of the ball when it is brought into contact with and engaged in the axial direction is larger than the diameter of the inner diameter surface of the outer ring. , The cage is an integral assembly.

Therefore, according to the present invention, it is possible to reduce the assembly man-hours and facilitate the management of parts in the separable angular ball bearing, and in particular, in order to reduce friction, etc., the tapered roller bearing can be used instead. This is an effective means when using angular contact ball bearings.

[Brief description of drawings]

FIG. 1 is a sectional view of an outer ring separation type angular contact ball bearing using a retainer of the present invention.

2 is a plan view (FIG. A) viewed from the outer diameter side of the cage in FIG. 1, a bb sectional view (FIG. 2b) in FIG. 2a, and c-
It is c sectional drawing (FIG. c).

FIG. 3 is a cross-sectional view showing a state when the ball is engaged with the axial portion of the cage.

FIG. 4 is a sectional view of an inner ring separation type angular contact ball bearing using the cage of the present invention.

FIG. 5 is a cross-sectional view showing a state when the ball is engaged with the axial portion of the cage.

FIG. 6 is a sectional view of an outer ring separation type angular contact ball bearing using a conventional cage (FIG. A), and a sectional view showing a state when the outer ring is separated (FIG. B).

FIG. 7 is a cross-sectional view of an outer ring separation type angular contact ball bearing using a conventional cage.

FIG. 8 is a plan view of a cage according to another embodiment of the present invention as viewed from the outer diameter side.

[Explanation of symbols]

 1 Inner ring 2 Outer ring 3 Ball 5 Cage 6 Pocket 7 Annular part 8 Column part 8a Inclined part 8b Axial part

Claims (2)

[Scope of utility model registration request] 1. In a cage incorporated in a separable angular ball bearing in which an outer ring can be separated, a plurality of pockets for accommodating balls are formed at equal intervals around the circumference, and both axial sides of the pocket are on the outer diameter surface of the inner ring. An annular portion to be guided, a column portion on both sides in the circumferential direction partitioning between the pockets, wherein the column portion is continuous from the annular portion on both sides in the axial direction in the outer diameter side inclining direction, respectively, and , A sloped portion extending over the pitch circle of the ball arranged on the raceway surface of the inner ring and the sloped portion being continuous in the axial direction, and having a minimum distance between the sloped portions facing each other in the circumferential direction, the diameter of the ball And a smaller axial direction portion, and a diameter of an inscribed circle of the ball in contact with the axial direction portion is smaller than an outer diameter surface of the inner ring. 2. In a cage incorporated in a separable angular ball bearing whose inner ring is separable, a plurality of pockets for accommodating balls are formed at equal intervals around the circumference, and both axial sides of the pocket are guided to the inner diameter surface of the outer ring. An annular portion formed on both sides in the circumferential direction to partition between the pockets, wherein the column portion is continuous from the annular portions on both sides in the axial direction in the inclining direction on the inner diameter side and the outer ring, respectively. Of the ball disposed on the raceway surface of the ball and the inclined part that extends in the axial direction and the minimum distance between the inclined parts that are continuous in the circumferential direction is greater than the diameter of the ball. A cage for a separable angular ball bearing, comprising a small axial portion, and a circumscribed circle diameter of the ball in a state of being in contact with the axial portion is larger than an inner diameter surface of the outer ring.