JP2008196666A - Ball bearing, its assembly method, and its assembly device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly method and an assembly device of a ball bearing capable of smoothly inserting all balls between inner and outer rings, and of forcibly arranging the balls to easily align the centers of the inner and outer rings after ball insertion; and a ball bearing using the method. <P>SOLUTION: This assembly device 10 has an inner ring-side and outer ring-side tools 12 and 13 each having a nearly-crescent shape, and moving forward and backward independently of each other in a space S between eccentrically-arranged inner and outer rings 2 and 3, and a nozzle 14 swingable in the space S. In a state where the inner ring-side and outer ring-side tools 12 and 13 are arranged on the lower side in the space S at heights different from each other, the balls 4 are incorporated while rocking the nozzle 14 along the inner diameter of the outer ring 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ball bearing, an assembling method thereof, and an assembling apparatus thereof.

  Conventionally, when assembling rolling elements of a bearing, in particular when assembling balls of a deep groove type ball bearing, the outer ring and the inner ring with the plane placed horizontally are arranged eccentrically, and the crescent-shaped jig is arranged with the eccentric inner and outer Place in the gap between the rings. Then, drop the ball from the nozzle for inserting the ball located on this jig so that the ball fits in the track position of the inner and outer rings, and after inserting the ball, align the center of the inner and outer rings and assemble the bearing (For example, refer to Patent Documents 1 to 3.)

In the ball insertion method described in Patent Document 1, a center pin is protruded from a swinging crescent-shaped ball receiver, and the inserted balls are arranged in a gap.
Japanese Patent No. 2756008 (Figs. 1 and 2) JP 2006-177507 A Japanese Patent Laid-Open No. 2004-068985

  However, in the method using the jig described in Patent Document 1, that is, the ball receiver and the center pin, balls are randomly arranged in the gaps between the inner and outer rings. When the center of the inner and outer rings is adjusted after the ball is inserted, the inserted ball is bitten by the inner ring and the outer ring in the gap between the inner and outer rings, and the centers of the inner and outer rings are not aligned. Furthermore, when a ball is inserted into the gap between the inner and outer rings using a nozzle, the ball from the nozzle is poorly ejected, or depending on the number of balls inserted, the last ball may be difficult to insert. There is a problem that not all balls can be inserted in time.

  The present invention has been made in view of the above-described problems, and its purpose is to allow all balls to be smoothly inserted between the inner and outer rings, and to easily align the centers of the inner and outer rings after the balls are inserted. An object of the present invention is to provide a ball bearing assembling method and an assembling apparatus capable of forcibly arranging balls, and a ball bearing using the method.

(1) a step of relatively eccentrically arranging the inner ring and the outer ring in the same plane, and forming a substantially crescent-shaped gap between the inner and outer rings;
The inner ring side and outer ring side jigs each having a substantially crescent shape are arranged at different heights below the gap, and the nozzles for storing a plurality of balls are arranged above the gap. From the step of incorporating the plurality of balls in the gap,
With either one of the inner ring side and outer ring side jigs removed from the gap and the other ball supported on the other side, the inner and outer rings are relatively moved to a position where the centers of the inner and outer rings coincide. Process,
A ball bearing assembling method comprising:
(2) One of the inner ring side and outer ring side jigs protrudes from the other of the inner ring side and outer ring side jigs in a state of being disposed in the gap, and inclines in a direction away from the other toward the tip. The assembly method according to (1), further comprising an inclined surface.
(3) The assembling method according to (1) or (2), wherein, in the assembling step, the plurality of balls are incorporated in the gap while the nozzle is swung in the gap.
(4) a step of relatively eccentrically arranging the inner ring and the outer ring in the same plane, and forming a substantially crescent-shaped gap between the inner and outer rings;
In a state where a substantially crescent-shaped jig is disposed below the gap and a nozzle for storing a plurality of balls is disposed above the gap, the nozzle is swung within the gap while the nozzle is swung from the nozzle. Incorporating the plurality of balls in the gap;
A step of relatively moving the inner and outer rings to a position where the centers of the inner and outer rings coincide with each other with the jig supporting the plurality of balls;
A ball bearing assembling method comprising:
(5) A ball bearing characterized by being assembled using the assembly method according to any one of (1) to (4).
(6) A jig that can be placed in a substantially crescent-shaped gap formed between the inner and outer rings formed by placing the inner ring and the outer ring relatively eccentric in the same plane;
A nozzle disposed above the gap and capable of storing the plurality of balls;
A ball bearing assembly device comprising:
A ball bearing assembling apparatus characterized in that the jigs can move forward and backward independently from each other in the gap and can be arranged at different heights, and have substantially crescent-shaped inner ring side and outer ring side jigs, respectively. .
(7) The ball bearing assembly apparatus according to (6), wherein the nozzle is swingable in the gap.
(8) a substantially crescent-shaped jig that can be disposed in a substantially crescent-shaped gap formed between the inner and outer rings formed by disposing the inner and outer rings relatively eccentrically in the same plane;
A nozzle disposed above the gap and capable of storing the plurality of balls;
A ball bearing assembly device comprising:
An assembly apparatus for a ball bearing, wherein the nozzle is swingable in the gap.

  According to the ball bearing assembling method and apparatus of the present invention, the inner ring and the outer ring side jigs each having a substantially crescent-shaped inner ring side and an outer ring side jig, which advance and retract independently from each other in a gap between the inner and outer rings arranged eccentrically, Since the balls are assembled with the side and outer ring side jigs arranged at different heights below the gap, all the balls can be smoothly inserted between the inner and outer rings, The balls can be forcibly arranged so that the center of the ring can be easily aligned.

  In addition, according to another ball bearing assembly method and apparatus of the present invention, since the nozzle can be swung in the gap and the ball is incorporated while the nozzle is swung, the ball is smoothly discharged from the nozzle. Thus, all the balls can be smoothly and quickly inserted between the inner and outer rings.

  Hereinafter, a ball bearing assembling method and an assembling apparatus according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1A, an assembling apparatus 10 according to an embodiment of the present invention is an apparatus for incorporating a plurality of balls 4 between an inner ring 2 and an outer ring 3 of a ball bearing 1. The assembling apparatus 10 is formed between a relative movement mechanism 11 that moves the inner ring 2 so that the inner ring 2 and the outer ring 3 are relatively eccentrically arranged in the same plane, and the inner and outer rings 2 and 3 that are eccentrically arranged. Metal inner ring side and outer ring side jigs 12 and 13 that can be disposed in a substantially crescent-shaped gap S, nozzles 14 that are disposed above the gap S and that can accommodate a plurality of balls 4, Is provided. The relative movement mechanism 11 may be a mechanism that moves the inner and outer rings 2 and 3 relatively, and may be a mechanism that moves the outer ring 3 or both the inner and outer rings 2 and 3.

  As shown in FIG. 2, the inner ring side and outer ring side jigs 12, 13 extend in a direction perpendicular to the inner ring side and outer ring side base portions 21, 22 and the inner ring side and outer ring side base portions 21, 22, respectively. Are provided with inner ring side and outer ring side crescent-shaped portions 23 and 24 each having a substantially crescent shape. The outward-facing side surface 23a of the inner ring-side crescent-shaped portion 23 is curved so that both ends thereof are separated from the inward-facing side surface 24a of the outer-ring-side crescent-shaped portion 24, and the space for arranging the balls 4 near both ends is secured. Yes. Specifically, as shown in FIG. 2C, the inward side surface 24a is configured by a combination of a plurality of curved surfaces, and the curvature radius R ′ of the curved surface near the upper end is the curvature radius R ″ of the curved surface near the center. It is set larger. Further, as shown in FIG. 3B, the curvature radius R of the outward side surface 23a is set to be smaller than any of the curvature radii R ′ and R ″ of the inward side surface 24a.

  Further, as shown in FIGS. 1C and 3A, the inner ring side crescent shaped part 23 has an outer ring side crescent shaped part 24 in a state where the outer ring side base part 22 is disposed on the upper surface of the inner ring side base part 21. It is formed higher than the upper surface of the outer ring-side crescent-shaped part 24 so as to protrude from the outer ring side crescent-shaped part 23, and the upper part of the outward-facing side surface 23 a is away from the outer ring-side jig 13 toward the tip. It has the inclined surface 23b which inclines.

  Further, as shown in FIG. 1B, the nozzle 14 is advanced and retracted vertically by the drive mechanism 15 so as to be disposed above the substantially crescent-shaped gap S, and along the inner diameter of the outer ring 3. It is swung.

  Next, an assembly method for the ball bearing 1 will be described with reference to FIGS. First, the inner ring 2 is moved relative to the outer ring 3 using the relative movement mechanism 11, and the inner ring 2 and the outer ring 3 are arranged relatively eccentric in the same plane as shown in FIG. . As a result, a substantially crescent-shaped gap S is formed between the inner and outer rings 2 and 3.

  Next, the inner ring side and outer ring side jigs 12 and 13 are advanced from below in the substantially crescent-shaped gap S between the inner and outer rings 2 and 3, and as shown in FIGS. 1 (c) and 3 (a), The inner ring-side crescent-shaped portion 23 is disposed below the gap S in a state where the upper surface of the inner-ring-side crescent-shaped portion 23 is higher than the upper surface of the outer ring-side crescent-shaped portion 24. The nozzle 14 is moved downward by the drive mechanism 15 and is disposed above the gap S.

  In this state, as shown in FIG. 1B and FIG. 4A, a plurality of balls 4 are moved from the nozzle 14 into the gap S while the nozzle 14 is swung along the inner diameter of the outer ring 3 in the gap S. Incorporate At this time, the balls 4 are actively scattered in the gap S between the inner and outer rings 2 and 3 by the swing of the nozzle 14, so that the balls 4 stay in the vicinity of the outlet of the nozzle 14, or the balls 4 enter the nozzle 14 from the outlet. Is prevented from clogging vertically, and the insertion time of the balls 4 can be shortened. The swing range of the nozzle 14 is set as appropriate according to the swing speed, ball size, and the like.

  Further, the plurality of balls 4 incorporated are supported on the inner ring side and outer ring side jigs 12 and 13 in the clearance S, but the outwardly inclined surface 23b of the inner ring side jig 12 causes the FIG. ), The arrangement is regulated. Thereby, it is prevented that the balls 4 cannot be fully inserted by arranging the balls 4 to the inner ring 2 side, and when the centers of the inner and outer rings 2 and 3 are made to coincide with each other after the balls 4 are inserted, The ball 4 is bitten by the outer ring 3 to prevent the center from being disabled.

  Thereafter, as shown in FIG. 4B, the nozzle 14 is moved upward by the drive mechanism 15 to be retracted from the gap S, and the ball 4 is supported by the outer ring side jig 13, and the inner ring side The jig 12 is retracted from the gap S. Then, as shown in FIG. 4C, the inner ring 2 is moved to the position where the centers of the inner and outer rings 2 and 3 coincide with each other by the relative movement mechanism 11 with the plurality of balls 4 supported by the outer ring side jig 13. 3 is moved relatively. Thereby, the plurality of balls 4 can come into contact with the raceway surfaces between the inner and outer rings 2 and 3. When the outer ring 3 is moved relative to the inner ring 2, the outer ring side jig 13 is moved together with the outer ring 3.

  Therefore, according to the assembling method and the assembling apparatus 10 for the ball bearing 1 of the present embodiment, the inner ring side having a substantially crescent shape that moves forward and backward independently from each other in the gap S between the inner and outer rings 2 and 3 arranged eccentrically. And the outer ring side jigs 12 and 13, and the balls 4 are assembled in a state where the inner ring side and outer ring side jigs 12 and 13 are arranged at different heights below the gap S. The balls 4 can be inserted between the inner and outer rings 2 and 3 smoothly, and the balls 4 can be forcibly arranged so that the centers of the inner and outer rings 2 and 3 can be easily aligned after the balls are inserted.

  Further, since only the inner ring side jig 12 can be retracted from the gap S while the outer ring side jig 13 supports the balls 4, the inner ring side can be used when the centers of the inner and outer rings 2, 3 are made coincident after the balls are inserted. It is possible to prevent the jig 12 from interfering with the inner ring 2.

  Further, the inner ring side jig 12 has an inclined surface 23b that protrudes from the outer ring side jig 13 and inclines in a direction away from the outer ring side jig 13 toward the tip, in a state where it is disposed in the gap S. The balls 4 can be forcibly arranged on the outer ring side.

  Moreover, according to the assembly method and the assembly apparatus 10 of the ball bearing 1 of the present embodiment, the ball 14 has the nozzle 14 that can swing in the gap S, and swings the nozzle 14 along the inner diameter of the outer ring 3. Therefore, the balls 4 can be smoothly discharged from the nozzle 14 and all the balls 4 can be smoothly inserted between the inner and outer rings 2 and 3 in a short time.

  Furthermore, according to the assembly method and the assembly apparatus 10 of the ball bearing 1 of the present embodiment, all the balls can be obtained by using the inner ring side and outer ring side jigs 12 and 13 and the swingable nozzle 14 in combination. 4 can be inserted more smoothly between the inner and outer rings 2 and 3, and the balls 4 can be forcibly arranged more easily so that the centers of the inner and outer rings 2 and 3 can be easily aligned after the balls are inserted.

  The ball bearing assembling method and the assembling apparatus of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

  For example, as shown in the first modification of FIG. 5, the inner ring side jig 12 may lower the inclination angle of the inclined surface 23 b in the vicinity of the insertion portion of the ball 4. Thereby, the space near the ball insertion part directly under the nozzle 14 can be expanded, and the insertability of the ball 4 can be improved while maintaining the effect of bringing the ball 4 to the outer ring side.

  Moreover, as shown in the 2nd modification of FIG. 6, the inner ring | wheel side jig | tool 12 has the some hollow 25 in the inclined surface, arrange | positions some balls 4 in this hollow 25, and brings it closer to the inner ring side. You may do it. Thereby, depending on the inner ring dimensions, outer ring dimensions, and the number of balls of the ball bearing 1, when the balls 4 cannot all be arranged on the outer ring side by the inner ring side jig 12, or when arranged, the centers of the inner and outer rings 2, 3 are arranged. Even in the case where it is not possible to align, by bringing some balls 4 closer to the inner ring side, it is possible to perform the aligning operation centering on the assembling work without any trouble.

It is a figure for demonstrating the assembly method and assembly apparatus of the ball bearing which concern on one Embodiment of this invention, (a) is a top view, (b) is the cross section along the II line | wire of (a). It is a figure, (c) is sectional drawing along the I'-I 'line of (a). (A) is a perspective view of an inner ring side jig, (b) is a perspective view of an outer ring side jig, and (c) is a perspective view as seen from an inward side surface side of the outer ring side jig. is there. The inner ring side and outer ring side jigs are shown in a state where they are arranged in the eccentric gap of the ball bearing, (a) is a transparent view thereof, and (b) is a top view of the inner ring side and outer ring side jigs. It is a figure for demonstrating the assembly procedure of a ball bearing, (a) shows the state in which a ball is inserted from a nozzle, (b) shows the state by which the nozzle and the inner ring | side jig | tool were evacuated from the clearance gap. (C) shows a state in which the inner ring is moved relative to the outer ring. It is a perspective view of the inner ring | wheel side and outer ring | wheel side jig | tool which concerns on a 1st modification. It is a perspective view of the inner ring | wheel side and outer ring | wheel side jig | tool which concerns on a 2nd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ball bearing 2 Inner ring 3 Outer ring 10 Assembly apparatus 12 Inner ring side jig 13 Outer ring side jig 14 Nozzle 23b Inclined surface

Claims (8)

Placing the inner ring and the outer ring relatively eccentric in the same plane, and forming a substantially crescent-shaped gap between the inner and outer rings;
The inner ring side and outer ring side jigs each having a substantially crescent shape are arranged at different heights below the gap, and the nozzles for storing a plurality of balls are arranged above the gap. From the step of incorporating the plurality of balls in the gap,
With either one of the inner ring side and outer ring side jigs removed from the gap and the other ball supported on the other side, the inner and outer rings are relatively moved to a position where the centers of the inner and outer rings coincide. Process,
A ball bearing assembling method comprising:   One of the inner ring side and outer ring side jigs has an inclined surface that protrudes from the other of the inner ring side and outer ring side jigs and is inclined toward the tip in a direction away from the other while being disposed in the gap. The assembly method according to claim 1, further comprising:   The assembling method according to claim 1 or 2, wherein in the assembling step, the plurality of balls are incorporated in the gap while the nozzle is swung in the gap. Placing the inner ring and the outer ring relatively eccentric in the same plane, and forming a substantially crescent-shaped gap between the inner and outer rings;
In a state where a substantially crescent-shaped jig is disposed below the gap and a nozzle for storing a plurality of balls is disposed above the gap, the nozzle is swung within the gap while the nozzle is swung from the nozzle. Incorporating the plurality of balls in the gap;
A step of relatively moving the inner and outer rings to a position where the centers of the inner and outer rings coincide with each other with the jig supporting the plurality of balls;
A ball bearing assembling method comprising:   A ball bearing assembled using the assembling method according to claim 1. A jig that can be placed in a substantially crescent-shaped gap formed between the inner and outer rings formed by relatively eccentrically arranging the inner ring and the outer ring in the same plane;
A nozzle disposed above the gap and capable of storing the plurality of balls;
A ball bearing assembly device comprising:
A ball bearing assembling apparatus characterized in that the jigs can move forward and backward independently from each other in the gap and can be arranged at different heights, and have substantially crescent-shaped inner ring side and outer ring side jigs, respectively. .   The ball bearing assembly apparatus according to claim 6, wherein the nozzle is swingable in the gap. A substantially crescent-shaped jig that can be disposed in a substantially crescent-shaped gap formed between the inner and outer rings formed by disposing the inner ring and the outer ring relatively eccentrically in the same plane;
A nozzle disposed above the gap and capable of storing the plurality of balls;
A ball bearing assembly device comprising:
An assembly apparatus for a ball bearing, wherein the nozzle is swingable in the gap.

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