JP2009233777A - Ball distribution apparatus of ball bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball distribution apparatus of a ball bearing which is simple in configuration and is easily miniaturized. <P>SOLUTION: The ball distribution apparatus of the ball bearing is provided with: an apparatus body 10 having at its upper part a bearing set part 35 in which the ball bearing 1 is fitted so that it can be taken out from the above; a plurality of stick members 50 having the same number as that of the plurality of balls 6 of the ball bearing 1, being annularly arranged with an equal interval, vertically movably installed in the apparatus body 10, and having at upper ends ball sorting parts 51 which are each thrust between the adjacent balls 6 of the ball bearing 1 and sort these balls 6; and cam mechanisms 70 which distribute the plurality of the balls 6 with a uniform interval by sequentially vertically moving the plurality of the stick members 50. The plurality of the balls 6 installed between the outer ring 2 and the inner ring 4 of the ball bearing 1 are distributed with an equal interval. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ball distribution device for a ball bearing that distributes a plurality of balls incorporated between an outer ring and an inner ring of the ball bearing at equal intervals.

Conventionally, this type of ball bearing device for ball bearings is disclosed in Patent Document 1, for example.
In this, in a ball distribution device for arranging a plurality of balls inserted between an inner ring and an outer ring of a ball bearing at a predetermined interval, the ball bearing device has a vertical rotation shaft and the balls of the ball bearing one by one. A turntable having the same number of comb teeth as the number of balls arranged around the rotation axis at an accommodable interval; and a driving means for rotating the turntable around the rotation axis and moving up and down in the vertical direction. Vertical direction pressing means for elastically pressing the ball bearing from above in the vertical direction, and horizontal direction pressing means for pressing the outer periphery of the outer ring of the ball bearing horizontally toward the rotating shaft of the turntable. Is provided.
JP 2002-266884 A

By the way, in the above-described conventional ball dispensing device, the number of components is large, and the device tends to be complicated and large.
In view of the above problems, an object of the present invention is to provide a ball distribution device for a ball bearing that has a simple structure and can be easily downsized.

In order to solve the above-described problem, a ball distribution device for a ball bearing according to claim 1 of the present invention distributes a plurality of balls incorporated between an outer ring and an inner ring of the ball bearing at equal intervals. A dispensing device,
An apparatus main body in which the ball bearing is installed so that the ball bearing can be taken out from above is formed on the upper part,
The same number of balls as the plurality of balls, arranged in an annular shape at equal intervals, and assembled to the apparatus main body so as to be able to move up and down. A plurality of skewer members having
And a cam mechanism that distributes the plurality of balls at equal intervals by sequentially moving the plurality of skewer members up and down.

According to the said structure, a ball bearing is first inserted and installed in the bearing set part of an apparatus main body from upper direction. Next, the same number of skewer members as the ball bearings are moved up and down sequentially by the cam mechanism, so that the ball splitting portion at the upper end of each skewer member sequentially enters between adjacent balls of the ball bearings. Is done. Thereby, a plurality of balls are distributed at equal intervals between the skewer members.
As described above, since the ball distribution device for ball bearings can be configured by including the device main body, the plurality of skewer members, and the cam mechanism, the structure is simple and the size can be easily reduced.
As a result, it can be provided at a low cost and the installation space can be easily secured.

The ball distribution device for a ball bearing according to claim 2 is the ball distribution device for a ball bearing according to claim 1,
The cam mechanism is a cylindrical cam member that is rotatably assembled around the apparatus body and has an annular cam surface;
A cam follower that is assembled to each of the plurality of skewer members and moves along the annular cam surface is provided.

According to the said structure, when a cylindrical cam member rotates around an apparatus main body, the cam follower of a some skewer member moves along a cyclic | annular cam surface. Then, each skewer member is moved up and down sequentially in the circumferential direction, and the ball dividing portion at the upper end portion of each skewer member is sequentially inserted between adjacent balls of the ball bearing, so that a plurality of balls are distributed at equal intervals. The
In this way, the cam mechanism can be easily configured by the cam follower of one cylindrical cam member and a plurality of skewer members, which is highly effective for cost reduction.

The ball distribution device for a ball bearing according to claim 3 is the ball distribution device for a ball bearing according to claim 2,
The cylindrical cam member is rotated by an endless conductive belt having a motor as a drive source on the outer peripheral surface thereof, and when a load of a predetermined value or more is applied to the cylindrical cam member, It is set so that slip may occur in the mutual contact portion between the belt and the outer peripheral surface of the cylindrical cam member.

  According to the above configuration, at the time of ball distribution in which the cylindrical cam member rotates, for example, when a lifting or lowering failure occurs in the skewer member and a load of a predetermined value or more is applied to the cylindrical cam member, the conductive belt and the cylindrical shape When the mutual contact portion with the outer peripheral surface of the cam member slides relatively, the rotation of the cylindrical cam member is stopped. Thereby, damage to the skewer member and the member that interferes with the skewer member can be prevented.

  The best mode for carrying out the present invention will be described in accordance with an embodiment.

[Example 1]
A first embodiment of the present invention will be described with reference to FIGS.
1 is a perspective view showing a ball distributor for a ball bearing according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a ball distribution device for ball bearings. FIG. 3 is a perspective view showing the skewer member. FIG. 4 is a plan view showing a state in which a plurality of balls of the ball bearing are distributed at equal intervals by the same number of skewer members.

As shown in FIGS. 1 and 2, the ball distribution device for a ball bearing according to the first embodiment includes a device main body 10, a plurality of skewer members 50, a cam mechanism 70, and a drive mechanism 80.
The apparatus main body 10 includes a base member 11, a lower guide member 20, and an upper guide member 30, and the base member 11 includes a base 12 fixed to a bolt or the like on the installation surface, and a center of the upper surface of the base 12. And a planar support 13 having a planar shape projecting in the vertical direction.

  The lower guide member 20 is formed with a disk portion 20a having a diameter larger than that of the support base 13 below the support guide 13. The disk portion 20a is fixed on the support base 13 of the base member 11 on the same center line. In the disk portion 20a of the lower guide member 20, a plurality of lower guide holes 21 for guiding the skewer members 50 in the same number as the plurality of skewer members 50 are provided at predetermined intervals in the circumferential direction. Yes. A cylindrical guide tube 25 protrudes at a predetermined height on the outer peripheral portion of the upper surface of the disk portion 20a. In the guide tube 25, the same number of vertically long sliding holes 26 as the number of the plurality of skewer members 50 are formed at equal intervals in the circumferential direction.

As shown in FIG. 1 and FIG. 2, the upper guide member 30 has a bottom plate portion 31 and a cylindrical body 32 that are appropriately smaller in diameter than the disk portion 20a of the lower guide member 20 at the bottom thereof, and has a bottomed cylinder. It is formed in a shape. And the upper guide member 30 is being fixed on the same center line on the disk part 20a of the lower guide member 20 in the baseplate part 31. As shown in FIG.
In addition, a bearing set portion 35 into which the inner ring 4 of the ball bearing 1 can be taken out from above is formed on the outer peripheral surface of the cylindrical body 32 of the upper guide member 30.

In the first embodiment, as shown in FIGS. 1 and 2, an outer diameter dimension slightly smaller than the inner diameter dimension of the inner ring 4 of the ball bearing 1 is formed on the outer peripheral surface of the cylindrical body 32 of the upper guide member 30. The fitting cylinder part 36 which has and the large diameter collar part 38 which is located in the lower end of this fitting cylinder part 36 and has the cyclic | annular bearing installation surface 39 on the upper surface are formed in the step shape.
And the bearing set part 35 is comprised by the outer peripheral surface 37 of the fitting cylinder part 36, and the bearing installation surface 39 of the upper surface of the collar part 38. As shown in FIG.
Further, the flange portion 38 of the upper guide member 30 is formed to have substantially the same outer dimension as the outer diameter size of the disk portion 20a of the lower guide member 20, and is on the same center line as the plurality of lower guide holes 21 of the lower guide member 20. A plurality of upper guide holes 34 are provided in the top.

As shown in FIGS. 1 and 2, a holding cylinder 40 made of an air cylinder or the like is fixed inside the cylindrical body 32 of the upper guide member 30 with its cylinder rod 41 facing upward. A pressing plate 42 for holding the ball bearing 1 on the bearing set portion 35 via a pressing plate 45 is attached to the upper end of the cylinder rod 41.
Further, between the holding cylinder 40 and the pressing plate 42, a return spring 43 made of a compression coil spring that repels the pressing plate 42 toward the rising end position together with the cylinder rod 41 is wound around the outer periphery of the cylinder rod 41. It is arranged in a state.

Further, the pressing plate 42 is formed smaller than the inner diameter dimension of the fitting cylindrical portion 37 of the bearing set portion 35, and the inner ring 4 of the ball bearing 1 passes through the pressing plate 42 and the outer peripheral surface of the fitting cylindrical portion 37 of the bearing set portion 35. It is set to be inserted into.
As shown in FIG. 1, the pressing plate 45 is formed with an outer diameter that is substantially the same as the outer diameter of the outer ring 2 of the ball bearing 1, and the outer diameter of the return spring 43 extends from the center to the outer peripheral surface. An insertion groove 46 having a groove width larger than the dimension is formed.
Further, a projecting wheel that presses the upper end face of the inner ring 4 of the ball bearing 1 protrudes from the lower surface of the pressing plate 45, and an operation handle 47 is formed on the upper surface of the pressing plate 45.

As shown in FIGS. 2 and 3, the plurality of skewer members 50 are formed by shaft members that are long in the vertical direction, and are inserted so as to be movable up and down from the lower guide hole 21 to the upper guide hole 34. They are assembled in an array of intervals.
At the upper end portions of the plurality of skewer members 50, a flat-plate-shaped ball dividing portion 51 that is inserted between the adjacent balls 6 of the ball bearing 1 and distributes the balls 6 is formed. Moreover, in this Example 1, the ball division part 51 is formed with a ball division inclined surface 52 inclined to one side (see FIG. 3).

The cam mechanism 70 moves up and down the plurality of skewer members 50 in order to distribute the balls 6 of the ball bearings 1 of the bearing set portion 35 at equal intervals, and includes one cylindrical cam member 71 and a plurality of skewer members. The number of roller-like cam followers 75 is the same as that of 50.
The cylindrical cam member 71 is rotatably assembled along the outer periphery of the support base 13 of the base member 11 and on the base 12 of the base member 11 via a thrust ball bearing 60 (see FIG. 2).
An annular cam surface 72 is formed along the cylindrical upper end surface of the cylindrical cam member 71.

On the other hand, the plurality of cam followers 75 are assembled so as to be rotatable around the axis of the slide shaft 55 integrated by being screwed into each skewer member 50 through each slide hole 26 formed in the guide tube 25 of the lower guide member 20. It has been. The cam followers 75 are moved along the cam surface 72 of the cylindrical cam member 71 so that the skewer members 50 are moved up and down.
Further, in the first embodiment, at a predetermined position on the outer peripheral surface of the cylindrical cam member 71, a pressing plate 77 having an upper end portion which is a pressing plate 77 for forcibly pressing down the cam follower 75 along the cam surface 72 of the cylindrical cam member 71. A guide member 76 is attached.
Further, in the first embodiment, as shown in FIGS. 1 and 2, two adjacent skewer members 50 out of the plurality of skewer members 50 always protrude from the bearing installation surface 39 of the bearing set portion 35. The shape of the cam surface 72 of the cylindrical cam member 71 is set. Thereby, the plurality of balls 6 are sequentially distributed at equal intervals in the circumferential direction.

The drive mechanism 80 that rotationally drives the cylindrical cam member 71 includes a motor (air motor in the first embodiment) 83 and an endless conductive belt 86.
As shown in FIG. 1, the motor 83 is mounted downward on a support plate 82 at the tip of an arm-like support member 81 fixed on the base 12 of the base member 11, and the tip of the output shaft of the motor 83. A drive pulley 85 is assembled to the portion, and a conductive belt 86 is stretched over the outer periphery of the drive pulley 85 and the cylindrical cam member 71.

In the first embodiment, the supply of air to the motor 83 and the holding cylinder 40 is set to be performed by a switch operation (for example, a foot switch operation) by an operator.
Further, when a load greater than or equal to a predetermined value is applied to the cylindrical cam member 71, the mutual contact portion between the conductive belt 86 and the outer peripheral surface of the cylindrical cam member 71 is set to slip.
Further, in the first embodiment, in order to adjust the tension of the conductive belt 86, the support member 81 can swing in the horizontal direction around the fulcrum screw 87 on the base 12 of the base member 11 at one end thereof. It is supported and fixed at a required swing angle by a fixing screw 88 screwed into the base 12 of the base member 11 and an arc-shaped long hole centered on the fulcrum screw 87.
Furthermore, an adjustment screw 89 whose tip is in contact with the shaft portion of the fixing screw 88 is screwed into the side surface of the support member 81. Then, by adjusting the adjustment screw 89 in a state where the fixing screw 88 is appropriately loosened, the support member 81 is swung in the horizontal direction around the fulcrum screw 87 with respect to the base 12 of the base member 11, thereby The tension of the conduction belt 86 is adjusted by changing the distance between the center of the base member 11 and the driving pulley 85.

The ball distribution device for ball bearings according to the first embodiment is configured as described above.
Therefore, as shown in FIG. 1, when distributing a plurality of balls 6 that are assembled in an eccentric manner between the outer ring 2 and the inner ring 4 of the ball bearing 1 at equal intervals, first, the upper guide member 30 of the apparatus main body 10 is distributed. The inner ring 4 of the ball bearing 1 is fitted from above the fitting cylinder portion 36 of the formed bearing set portion 35, and the lower surface of the ball bearing 1 (the lower surface of the inner ring 4 or the lower surface of the outer ring 2) is on the bearing installation surface 39. Installed.
Next, with the pressing plate 42 at the upper end of the cylinder rod 41 of the holding cylinder 40 placed at the rising end position, the pressing plate 45 is inserted into the upper portion of the cylinder rod 41 of the holding cylinder 40 in the insertion groove 46. It is mounted on the upper surface of the ball bearing 1 (the upper surface of the inner ring 4 or the upper surface of the outer ring 2).
Thereafter, as shown in FIG. 2, the holding cylinder 40 is operated to lower the pressing plate 42 together with the cylinder rod 41 against the urging force of the return spring 43. As a result, the ball bearing 1 is fixed to the bearing set portion 35.
In the first embodiment, with the lower end surface of the inner ring 4 of the ball bearing 1 being installed on the bearing installation surface 39, the upper end surface of the inner ring 4 of the ball bearing 1 is pressed by the projecting wheel on the lower surface of the pressing plate 45, The outer ring 2 of the ball bearing 1 is held rotatably.

Here, after the motor 83 is actuated and the cylindrical cam member 71 is rotated once or twice via the conductive belt 86, the cylindrical cam member 71 is stopped together with the motor 83.
The rotation of the cylindrical cam member 71 moves the cam followers 75 of the skewer members 50 along the cam surface 72, and the skewer members 50 are sequentially moved up and down in the circumferential direction.
Then, the ball dividing portion 51 at the upper end of each skewer member 50 is sequentially inserted between the adjacent balls 6 of the ball bearing 1. Thereby, the plurality of balls 6 are distributed at equal intervals between the skewer members 50 (see FIG. 4).

  Thereafter, the cylinder rod 41 of the holding cylinder 40 is raised to the original rising end position, the push plate 45 is pulled out, and then the ball bearing 1 is lifted upward to be taken out, whereby a plurality of balls 6 of the ball bearing 1 are distributed. Is completed. In addition, a retainer is assembled between the outer ring 2 and the inner ring 4 of the ball bearing 1 in which the plurality of balls 6 are distributed at equal intervals, and the plurality of balls 6 are distributed at equal intervals by the retainer. Retained.

As described above, in the first embodiment, since the device main body 10, the plurality of skewer members 50, and the cam mechanism 70 can be provided to form a ball distribution device for ball bearings, the structure is simple and small. Can be easily achieved. As a result, it can be provided at a low cost and the installation space can be easily secured.
In the first embodiment, the cam mechanism 70 is easily configured by one cylindrical cam member 71 rotatably assembled around the lower guide member 20 of the apparatus main body 10 and the cam followers 75 of the plurality of skewer members 50. Can be effective in reducing costs.

  Further, in the first embodiment, at the time of ball distribution in which the cylindrical cam member 71 rotates, for example, when a rise or fall failure occurs in the skewer member 50 and a load of a predetermined value or more is applied to the cylindrical cam member 71. The rotation of the cylindrical cam member 71 is stopped when the contact portions of the conductive belt 86 and the outer peripheral surface of the cylindrical cam member 71 slide relative to each other. As a result, damage to the skewer member 50 and the members that interfere with the skewer member 50 can be prevented.

In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.
For example, in the first embodiment, the case where the apparatus main body 10 is configured by connecting the three parts of the base member 11, the lower guide member 20, and the upper guide member 30 in the vertical direction is illustrated. It is also possible to configure with one part or one part.
In the first embodiment, the cylindrical cam member 71 constituting the cam mechanism 70 is rotated by the transmission belt 86 using the motor 83 as a drive source. However, the cylindrical cam member 71 is connected via a gear train. You may make it rotate by connecting with a motor. Furthermore, the cylindrical cam member 71 may be configured to be rotatable by manual operation.
The cam mechanism 70 may adopt any structure as long as the skewer members 50 are sequentially moved up and down in the circumferential direction.

It is a perspective view which shows the ball distribution apparatus of the ball bearing which concerns on Example 1 of this invention. It is a longitudinal section showing a ball distribution device of a ball bearing similarly. It is a perspective view which similarly shows a skewer member. It is a top view which shows the state by which the ball | bowl of the same ball bearing was equally distributed by the same number of skewer members at equal intervals.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ball bearing 2 Outer ring 4 Inner ring 6 Ball 10 Apparatus main body 11 Base member 20 Lower guide member 30 Upper guide member 35 Bearing set part 36 Fitting cylinder part 39 Bearing installation surface 40 Holding cylinder 50 Skewer member 51 Ball dividing part 70 Cam mechanism 71 Cylindrical cam member 72 Cam surface 75 Cam follower 80 Drive mechanism 83 Motor 86 Conductive belt

Claims (3)

A ball distribution device for a ball bearing that distributes a plurality of balls incorporated between an outer ring and an inner ring of the ball bearing at equal intervals,
An apparatus main body in which the ball bearing is installed so that the ball bearing can be taken out from above is formed on the upper part,
The same number of balls as the plurality of balls, arranged in an annular shape at equal intervals, and assembled to the apparatus main body so as to be able to move up and down. A plurality of skewer members having
A ball distribution device for a ball bearing, comprising: a cam mechanism that sequentially moves the plurality of skewer members up and down to distribute the plurality of balls at equal intervals. A ball distribution device for a ball bearing according to claim 1,
The cam mechanism is a cylindrical cam member that is rotatably assembled around the apparatus body and has an annular cam surface;
A ball distribution device for ball bearings, comprising: a cam follower that is assembled to each of the plurality of skewer members and moves along the annular cam surface. A ball distribution device for ball bearings according to claim 2,
The cylindrical cam member is rotated by an endless conductive belt having a motor as a drive source on the outer peripheral surface thereof, and when a load of a predetermined value or more is applied to the cylindrical cam member, A ball distribution device for a ball bearing, wherein the ball distribution device is set such that slip occurs at a contact portion between the belt and the outer peripheral surface of the cylindrical cam member.

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