JP4888969B2 - Bearing rolling element distribution device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling element uniformly arranging device and a rolling element uniformly arranging method capable of performing uniformly arranging processing with small energy consumption without contact. <P>SOLUTION: This rolling element uniformly arranging device 1 used in manufacturing a rolling bearing constituted by arranging the plurality of rolling elements between an inner ring and an outer ring coaxially disposed, has a holding portion 2 for coaxially holding the inner ring IR and the outer ring OR retaining the rolling elements R therebetween, in a state that an axis O is vertically directed, and a magnet 3 disposed on at least one side of the axial O direction of the inner ring IR and the outer ring OR held by the holding portion 2, in a state that one of magnetic poles is opposed to at least one side of the inner ring IR and the outer ring OR. A rotating device 12 is disposed to relatively rotate the inner ring IR and the outer ring OR held by the holding portion 2 around the axis O. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

The present invention relates to a rolling element such HaiSo location used for the production of a rolling bearing with rolling elements of the steel ball or the like.

The rolling bearing is composed of an inner ring and an outer ring, a plurality of rolling elements interposed between the inner and outer rings to allow relative rotation between the inner ring and the outer ring, and inserted between the inner and outer rings so that each rolling element is rotated around the axis of the inner and outer rings. And a retainer for holding in a state of being arranged at equal angular intervals.
The thus configured rolling bearing is manufactured by arranging an inner ring on the inner peripheral side of the outer ring, installing a rolling element between the inner and outer rings, and then inserting a retainer between the inner and outer rings.
In the manufacturing process of this rolling bearing, after installing rolling elements between the inner and outer rings, a process (equal distribution process) for arranging the rolling elements at equal angles around the axis of the inner and outer rings is performed. The retainer is inserted between the inner and outer rings.

As an apparatus for performing equal distribution processing of rolling elements, for example, a bearing assembly apparatus described in Patent Document 1 described later and an equal distribution apparatus described in Patent Document 2 are known.
The bearing assembly apparatus described in Patent Document 1 inserts a comb-like jig between inner and outer rings, and directly operates the balls (rolling elements) with the jig to perform equal distribution of the balls.
The equal distribution device described in Patent Document 2 has a nozzle opposed to one end opening of an annular space between an inner ring and an outer ring, and moves balls (rolling elements) by the force of compressed air discharged from the nozzle. It is.

JP-A-9-225757 JP 2001-241458 A

  However, in the bearing assembly device described in Patent Document 1, the rolling element is directly operated by a jig, so that the rolling element may be damaged. If the rolling element is damaged in this way, vibration and noise may occur during the operation of the rolling bearing. For this reason, it is desirable to perform the equal distribution processing of the rolling elements in a non-contact manner.

On the other hand, in the equal distribution apparatus described in Patent Document 2, the rolling elements are moved in a non-contact manner using air pressure, so that the rolling elements are not damaged.
Here, in recent years, there has been a strong demand for reduction of energy consumption due to increasing interest in environmental problems, and therefore, it has been required to perform equal distribution processing of rolling elements using a device with lower power consumption. Yes.
However, in the equal distribution apparatus described in Patent Document 2, a large amount of compressed air is consumed to move the rolling elements by air pressure. In order to obtain such a large amount of compressed air, it is necessary to use a large-capacity compressor with large power consumption. Further, the provision of a large-capacity compressor in this way increases the size of the equal distribution device.

  The present invention has been made in view of such circumstances, and provides a rolling element equalizing device and a rolling element equalizing method capable of performing equalizing treatment in a non-contact manner and with low energy consumption. With the goal.

In order to solve the above problems, the present invention employs the following means.
A rolling element equalizing device used for manufacturing a rolling bearing in which a plurality of rolling elements are arranged between an inner ring and an outer ring arranged coaxially, wherein the inner ring has the rolling elements arranged therebetween. And a holding part that supports the outer ring coaxially in a direction in which the respective axes are vertical, and magnets that are arranged on both sides in the axial direction of the inner ring and the outer ring that are held by the holding part. The magnet disposed on one side in the axial direction is formed in a columnar shape facing the inner ring, and the magnet disposed on the other side in the axial direction is formed in an annular shape facing the outer ring. A moving body equalizing device is provided.

  In the rolling element equalizing device configured as described above, the inner ring and the outer ring are held by the holding unit so as to be substantially coaxial with each other in a direction in which the axes thereof are substantially vertical. In this state, the track of the rolling element formed between the inner ring and the outer ring becomes substantially horizontal (that is, the inclination of the track with respect to the horizontal plane is eliminated). For this reason, in this state, each rolling element disposed between the inner ring and the outer ring does not move due to the action of gravity, and remains in place unless it receives an external force other than gravity.

In this rolling element equal distribution device, the rolling elements are arranged on both sides in the axial direction of the inner ring and the outer ring held by the holding portion .
Thereby, the magnetic force line which this magnet emits passes each rolling element arranged between the inner ring and the outer ring. Thus, a repulsive force acts between adjacent rolling elements, when the magnetic force line which a magnet emits passes through each rolling element. Each rolling element moves to a position (position where the distance between the rolling elements becomes equal) where the repulsive force acting between the rolling elements is balanced by the repulsive force. Thereby, each rolling element is arrange | positioned at equal angles around the axis line of an inner ring | wheel and an outer ring | wheel.

  Normally, in the rolling bearing manufacturing process, the rolling element may be magnetized in a process other than the equal distribution process. Therefore, in order to prevent adverse effects due to the magnetization of the rolling element, the rolling element in the final stage of the manufacturing process. Degaussing is performed. For this reason, even if a magnetic force is applied to the rolling elements during the equal distribution treatment, the performance of the completed rolling bearing does not deteriorate.

  Here, when the pair of magnets are arranged with the different magnetic poles facing each other so that the inner ring and the outer ring held by the holding portion are sandwiched from both sides in the axial direction, the magnet is placed in one of the inner ring and the outer ring in the axial direction The magnetic force acting on each rolling element is greater than that provided only in the case. For this reason, the force which moves each rolling element becomes larger, and the equal distribution process of a rolling element can be performed more reliably.

  In particular, the magnet arranged on one side in the axial direction is formed in a columnar shape facing the inner ring, and the magnet arranged on the other side in the axial direction is formed in an annular shape facing the outer ring, so that the columnar magnet From the inner ring, the rolling element and the outer ring, magnetic lines of force are formed into an annular magnet, all the rolling elements are magnetized to the same magnetic pole by a relatively large magnetic force, and the rolling elements are equally distributed by the mutual repulsive force. Is done.

  In this case, there is no obstacle on the side of the magnet formed in an annular shape, and the arrangement of the rolling elements between the inner ring and the outer ring can be easily observed through the central hole of the magnet. Therefore, it is possible to confirm that the equal distribution process has been sufficiently performed, and to prevent the occurrence of inconvenience that the rolling bearing with poor distribution flows to the subsequent process. Further, as soon as the equal distribution process is sufficiently performed, the process can be cut off, and the equal distribution process can be made efficient and the time required for the process can be shortened.

In the rolling element equalizing device of the present invention, the magnet may be an electromagnet.
In this case, the magnetic force of the electromagnet can be turned on / off by turning on / off the power supply to the electromagnet. For this reason, by stopping the generation of the magnetic force of the electromagnet after the equalizing treatment, the action of the magnetic force on the rolling elements is eliminated, and the inner ring and the outer ring can be moved without destroying the uniform arrangement state of the rolling elements.

The magnet formed in a columnar shape may be formed in a columnar shape having a dimension in the magnetic pole direction larger than a dimension in a direction orthogonal to the direction of the magnetic pole.
In this case, since the magnetic force which acts on a rolling element can be earned, the magnetic force added to a rolling element becomes large, and a rolling element can be easily moved to a predetermined position.
In order to further increase the magnetic flux density of the magnet, the dimension (outer diameter dimension) in the direction orthogonal to the direction of the magnetic pole of the magnet is preferably the same as or slightly smaller than the outer diameter of the outer ring.

In addition, the end of the magnet formed in the columnar shape that faces the inner ring may have a circular shape when viewed from a cross section perpendicular to the direction of the magnetic pole.
In this case, a magnetic field that is rotationally symmetric about the axis of the inner ring and the outer ring is formed in the vicinity of the end portions of the magnet facing the inner ring and the outer ring. That is, the magnitude of the magnetic field formed between the inner ring and the outer ring is substantially uniform over the entire region between the inner ring and the outer ring. Thereby, the magnetic force which acts on each rolling element becomes uniform, and the rolling elements are evenly distributed with higher accuracy.

The rolling element equalizing device of the present invention may include a rotating device that relatively rotates the inner ring and the outer ring held by the holding unit around the axis.
In this case, by rotating the inner ring and the outer ring relative to each other by the rotating device, the rolling elements installed between the inner and outer rings are rotated to be in a dynamic friction state with respect to the inner ring and the outer ring. In the dynamic friction state, the frictional resistance generated between the inner and outer rings and the rolling elements is smaller than that in the stationary state, so that the rolling elements are easy to move, and the equalizing process can be performed easily and reliably. And since a rolling element becomes easy to move in this way, the magnetic force required for an equal distribution process may be small, and it is possible to achieve size reduction of a magnet or to use an inexpensive magnet with weak magnetic force.
Furthermore, by rotating the inner ring and the outer ring relative to each other, the rolling elements that are extremely close to each other between the inner ring and the outer ring are separated from each other, so that the equalizing process is more reliably performed.

Moreover, in the said invention, the said magnet is arrange | positioned only at one side of the said axial direction of the said inner ring | wheel and the outer ring | wheel, and the imaging device which image | photographs the said rolling element between the said inner ring | wheel and the said outer ring | wheel on the other of the said axial direction. It is good also as a structure which has.
Also with this configuration, it is possible to confirm the arrangement of the rolling elements using an image acquired by the imaging device, and it is possible to automate the equal distribution process.

Moreover, in the said invention, it is good also as a structure provided with the control apparatus which controls the said rotation apparatus based on the image acquired by the said imaging device.
With this configuration, the rotating device is operated by the operation of the control device, and the equalizing process is performed in a state where dynamic friction acts on the inner ring, the outer ring, and the rolling elements, and the equal distribution is sufficient based on the acquired image. When it is confirmed that the rolling element is stopped, the rotating device is stopped so that the static friction acts, so that the rolling elements are held at equal intervals to finish the equalizing process. Can do. Thereby, the equal distribution process can be easily automated, the end of the equal distribution process can be reliably determined in a short time, and the time required for the process can be shortened.

  According to the rolling element equalizing device and the rolling element equalizing method according to the present invention, it is possible to perform the equalizing process of the rolling elements in a non-contact manner and with a small energy consumption.

[First Embodiment]
Below, 1st Embodiment of the rolling element equal distribution apparatus which concerns on this invention is described with reference to drawings.
As shown in FIG. 1, the rolling element equalizing device 1 shown in the present embodiment is a production of a rolling bearing B in which a plurality of rolling elements R are arranged between an inner ring IR and an outer ring OR arranged coaxially. This constitutes a part of the bearing manufacturing apparatus used in the above. This rolling element distribution device 1 is intended for a ball bearing using a steel ball as the rolling element R.
The rolling element equalizing device 1 includes a holding unit 2 that supports the inner ring IR and the outer ring OR, in which the rolling elements R are disposed between them, coaxially in a direction in which the respective axes O are substantially vertical, and the holding unit 2. A magnet 3 is disposed on at least one of the held inner ring IR and outer ring OR in the direction of the axis O, with one magnetic pole facing the inner ring IR.

In the present embodiment, the pair of magnets 3 are arranged so as to sandwich the inner ring IR from both sides in the axis O direction. The pair of magnets 3 are arranged so that different magnetic poles face each other.
Of the pair of magnets 3, the magnet 3 positioned above the inner ring IR and the outer ring OR is referred to as an upper magnet 3a, and the magnet 3 positioned below the inner ring IR and the outer ring OR is referred to as a lower magnet 3b.
In the present embodiment, the upper magnet 3a and the lower magnet 3b are both permanent magnets.

This rolling element equalizing device 1 has a moving device 11 that relatively moves the inner ring IR and outer ring OR and the magnet 3 in the direction of the axis O of the inner ring IR and outer ring OR. In the present embodiment, the moving device 11 is configured to displace the upper magnet 3a in the vertical direction.
Here, as the moving device 11, for example, an actuator that moves the magnet 3 using hydraulic pressure, air pressure, magnetic force, or the like is used.
In the present embodiment, the pair of magnets 3 are configured to hold the inner ring IR of the rolling bearing B from above and below by operating the moving device 11. That is, in this rolling element equalizing device 1, the pair of magnets 3 functions as the holding unit 2.

The upper magnet 3a and the lower magnet 3b are formed in a columnar shape whose dimension in the magnetic pole direction is larger than the dimension (outer diameter dimension) in the direction orthogonal to the direction of the magnetic pole. Here, the dimensions of the upper magnet 3a and the lower magnet 3b in the magnetic pole direction are preferably the same as or slightly smaller than the outer diameter of the outer ring.
The upper magnet 3a and the lower magnet 3b are circular at least at the end facing the inner ring IR when viewed from a cross section perpendicular to the direction of the magnetic pole.

The rolling element equalizing device 1 includes a rotating device 12 that relatively rotates the inner ring IR and the outer ring OR held by the holding unit 2 around the axis O.
In the present embodiment, the rotating device 12 includes a roller 13 whose outer peripheral surface is brought into contact with the outer ring OR held by the holding unit 2, and a driving device 14 that rotationally drives the roller 13 around its axis. The outer ring OR is rotated with respect to the inner ring IR by operating the device 14 to rotationally drive the roller 13.
Here, in order not to damage the outer ring OR, it is preferable that at least the outer peripheral portion of the roller 13 that contacts the outer ring OR is made of a flexible material such as rubber.

Hereinafter, the equalizing process of the rolling element R by the rolling element equalizing apparatus 1 comprised in this way is demonstrated. Here, normally, in the rolling bearing B before the equal distribution treatment, each rolling element R is irregularly arranged between the inner ring IR and the outer ring OR as shown in FIG.
In performing such an equal distribution process of the rolling bearings B, first, the moving device 11 is operated to raise the upper magnet 3a and to sufficiently separate the upper magnet 3a from the lower magnet 3b.
In this state, the inner ring IR and the outer ring OR, in which the rolling elements R are disposed between each other, are placed on the lower magnet 3b with their respective axis lines O oriented vertically. At this time, the inner ring IR and the outer ring OR are arranged coaxially with the lower magnet 3b having a cylindrical shape. Thereby, only the inner ring IR is supported by the lower magnet 3b. In this state, the outer ring OR is supported by the inner ring IR via the rolling elements R, and relative rotation about the axis O is allowed with respect to the inner ring IR.

  Thus, in a state where the inner ring IR and the outer ring OR are held in such a direction that the axis O is substantially vertical, the trajectory of the rolling element R formed between the inner ring IR and the outer ring OR becomes substantially horizontal ( That is, there is no inclination of the trajectory with respect to the horizontal plane). For this reason, in this state, each rolling element R disposed between the inner ring IR and the outer ring OR does not move due to the action of gravity, and remains in place unless it receives an external force other than gravity.

Next, the moving device 3 is operated to lower the upper magnet 3a, and the inner ring IR is sandwiched from above and below by the upper magnet 3a and the lower magnet 3b.
As a result, the inner ring IR is securely held, and the magnetic lines of force M generated by the pair of magnets 3 pass through the rolling elements R arranged between the inner ring IR and the outer ring OR in the vertical direction.

  Thus, when the magnetic force line M which a pair of magnet 3 emits passes through each rolling element, the repulsive force F acts on adjacent rolling elements R as shown in FIG. Each rolling element R moves to a position (position where the distance between the rolling elements R becomes equal) where the repulsive force acting between the rolling elements R is balanced by the repulsive force. As a result, as shown in FIG. 4, the rolling elements R are arranged at equal angles around the axis O of the inner ring IR and the outer ring OR.

  In this embodiment, the inner ring IR and the outer ring OR are sandwiched from both sides in the axis O direction, and the pair of magnets 3 are arranged so that different magnetic poles face each other. For this reason, compared with the case where the magnet 3 is provided only in one of the inner ring IR and the outer ring OR in the direction of the axis O, the magnetic force acting on each rolling element R is larger, and the repulsive force F acting between the rolling elements R is also greater. Since it becomes large, each rolling element R can be moved to a predetermined position more reliably.

The pair of magnets 3 is formed in a columnar shape having a dimension in the magnetic pole direction larger than a dimension in the direction orthogonal to the direction of the magnetic pole. For this reason, the magnetic force which acts on the rolling element R can be earned, and the magnetic force added to the rolling element R becomes large. Thereby, in this rolling element equal distribution apparatus 1, the rolling element R can be easily moved to a predetermined position.
Further, the dimension (outer diameter dimension) in the direction orthogonal to the direction of the magnetic poles of the pair of magnets 3 is the same as or slightly smaller than the outer diameter of the outer ring. The moving body R can be easily moved to a predetermined position.

In addition, the pair of magnets 3 have a circular shape when viewed from a cross section perpendicular to the direction of the magnetic poles, at least at the ends facing the inner ring IR and the outer ring OR.
Therefore, a magnetic field that is rotationally symmetric around the axis O of the inner ring IR and the outer ring OR is formed in the vicinity of the end of the magnet 3 facing the inner ring IR and the outer ring OR. That is, the magnitude of the magnetic field formed between the inner ring IR and the outer ring OR is substantially uniform over the entire region between the inner ring IR and the outer ring OR. Thereby, the magnetic force acting on each rolling element R becomes uniform, and the rolling elements OR are evenly arranged with higher accuracy.

Further, in this rolling element equalizing device 1, the equalizing process by the pair of magnets 3 is performed in a state in which the inner ring IR and the outer ring OR held by the holding unit 2 are relatively rotated around the axis O by the rotating device 12. Done.
By rotating the inner ring IR and the outer ring OR relative to each other in this way, the rolling elements R installed between the inner and outer rings are rotated to be in a dynamic friction state with respect to the inner ring IR and the outer ring OR.

In the dynamic friction state, the frictional resistance generated between the inner and outer rings and the rolling element R is smaller than that in the stationary state. Therefore, the rolling element R is easy to move, and the equalizing process can be performed easily and reliably.
And since the rolling element R becomes easy to move in this way, the magnetic force required for the equal distribution processing is small, and it is possible to reduce the size of the pair of magnets 3 or to use an inexpensive magnet with weak magnetic force. Is possible.
Further, by rotating the inner ring IR and the outer ring OR relative to each other in this way, the rolling elements R that are extremely close to each other between the inner ring IR and the outer ring OR are separated from each other, so that the equalizing process is more reliably performed. Done.

  Normally, in the manufacturing process of the rolling bearing B, the rolling element R may be magnetized in a process other than the equal distribution process. Therefore, at the final stage of the manufacturing process, the adverse effect due to the magnetization of the rolling element R does not occur. The rolling element R is demagnetized. For this reason, even if a magnetic force is applied to the rolling elements R during the equal distribution treatment, the performance of the completed rolling bearing B does not deteriorate.

As described above, according to the rolling element equalizing device 1 according to the present embodiment, since a device with high power consumption such as a compressor is not used for the equalizing process, the rolling element R and the like is non-contact and has a small energy consumption. Distribution processing can be performed.
Furthermore, in this embodiment, since the upper magnet 3a and the lower magnet 3b are permanent magnets, a magnetic force can be generated without consuming electric power, except that energy is consumed when the magnets 3 are manufactured.
For this reason, magnetic force can be applied to the rolling elements R without consuming electric power, and less energy is consumed during the equalizing process.

Here, when the magnet 3 used for the equal distribution processing is a permanent magnet, the magnetic force generated by the magnet 3 cannot be stopped. Therefore, after the equal distribution process, the moving device 11 is operated to raise the upper magnet 3a, and the inner ring IR and outer ring OR and the upper magnet 3a are sufficiently separated in the direction of the axis O of the inner ring IR and outer ring OR. After that, the inner ring IR and the outer ring OR are moved upward and moved from above the lower magnet 3b.
Thus, by separating the inner ring IR and the outer ring OR and the magnet 3 in the axial direction of the inner ring IR and the outer ring OR, the rolling element R can be applied to the rolling element R without breaking the balance of the magnetic force acting on each of the equally distributed rolling elements R. Since the acting magnetic force can be greatly reduced, the inner ring IR and the outer ring OR can be moved without breaking the equidistant state of the rolling elements R.

In the above-described embodiment, the example in which both of the pair of magnets 3 are permanent magnets is shown. However, the present invention is not limited to this, and only one of these magnets 3 may be a permanent magnet and the other may be an electromagnet. Both may be electromagnets.
When both of the pair of magnets 3 are electromagnets, the magnetic force of the magnet 3 can be turned on / off by turning on / off the power supply to the magnet 3. For this reason, by stopping the magnetic force generation of the magnet 3 after the equal distribution treatment, the magnetic force is not applied to the rolling elements R, and the inner ring IR and the outer ring OR can be moved without breaking the equal distribution state of the rolling elements R. it can.

Moreover, in the said embodiment, although the example which provided a pair of magnet 3 was shown, it is not restricted to this, You may provide only one magnet 3 like the rolling element equal distribution apparatus 21 shown in FIG. . The rolling element equalizing device 21 is obtained by omitting the upper magnet 3a and the moving device 11 from the rolling element equalizing device 1 described above.
In this case, the line of magnetic force M generated by the lower magnet 3b passes through the rolling element R of the rolling bearing B on the lower magnet 3b from the upper end of the lower magnet 3b and then the lower magnet 3b. It goes to the lower end of the lower magnet 3b on the outside in the radial direction, and also in this case, the rolling elements R are equally distributed by magnetic force.

[Second Embodiment]
Next, a rolling element equalizing device 31 according to a second embodiment of the present invention will be described below with reference to FIG.
In the description of the present embodiment, portions having the same configuration as those of the rolling element equalizing device 1 according to the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In the rolling element equalizing device 31 according to the present embodiment, an annular upper magnet 32 is disposed instead of the upper magnet 3a of the rolling element equalizing device 1 according to the first embodiment, and an inner ring IR and an outer ring OR are arranged. Is provided with a camera (photographing device) 33 for photographing the entire plurality of rolling elements R in the track formed between the inner ring IR and the outer ring OR. A control device 34 is connected to the camera 33. The control device 34 processes the image acquired by the camera 33 and controls the rotation device 12. In the figure, reference numeral 35 denotes a lighting device.

  The annular upper magnet 32 includes a central hole 32a into which a part of the outer peripheral surface of the outer ring OR is fitted. The lower magnetic pole of the annular upper magnet 32 has a magnetic pole different from the magnetic pole on the upper end surface of the lower magnet 3b, and the magnetic lines of force M are formed as shown in FIG. That is, the magnetic lines of force M are formed so as to pass from the lower magnet 3b through the inner ring IR, the rolling elements R and the outer ring OR, enter the upper magnet 32, pass through the air, and return to the lower end surface side of the lower magnet 3b. .

The camera 33 captures the entire plurality of rolling elements R between the inner ring IR and the outer ring OR arranged inside the central hole 32a of the upper magnet 32.
Further, the control device 34 processes the image of the rolling element R in the trajectory acquired by being photographed by the camera 33, and for example, recognizes the contour shape of the rolling element R to recognize the image of the rolling element R. The position of the center of gravity is obtained, and it is determined whether or not the distance between the centers of gravity of all adjacent rolling elements R is substantially equal.

Specifically, the control device 34 determines whether or not the distance between the centroids of all the adjacent rolling elements R is within a predetermined threshold range with respect to the target value. When it is arranged within the range, a stop signal is output to the rotating device 12.
According to the rolling element equalizing device 31 according to the present embodiment configured as described above, the entire arrangement of the plurality of rolling elements R can be observed from above by forming the upper magnet 32 in an annular shape. Thereby, the inconvenience which flows to a post process with the rolling elements R being inadequately arranged can be prevented more reliably.

In addition, the camera 33 shoots the evenly distributed state of the rolling elements R and stops the rotating device 12 when it is determined that the rolling elements are sufficiently arranged, so that the equalizing process is terminated. Equal distribution processing can be performed efficiently without waiting for the passage of time. As a result, there is an advantage that the time required for processing can be shortened and the cycle time can be shortened.
In the case where the equality state is determined by photographing with the camera 33 after a predetermined time has elapsed, the equality process can be performed again in the case of a poor distribution.

In the present embodiment, the upper magnet 32 has an annular shape to provide a space for observing the arrangement of the rolling elements R. Instead, as shown in FIG. 5, the lower magnet 3b is provided. Alternatively, the camera 33 may be provided above.
Further, as the illumination device 35, the transmitted illumination disposed on the opposite side of the camera 33 with the rolling element R interposed therebetween is illustrated, but instead, the illumination apparatus 35 is disposed on the same side as the camera 33 with respect to the rolling element R. Then, the reflected light may be photographed.
Further, the upper magnet 32 may be a permanent magnet or an electromagnet. In the case of an electromagnet, the start and stop of the equalizing process may be switched by turning the electromagnet ON / OFF.

It is a longitudinal cross-sectional view which shows the structure of the rolling element equal distribution apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows typically the principle of the equal distribution process by the rolling element equal distribution apparatus of this invention. It is a figure which shows typically the principle of the equal distribution process by the rolling element equal distribution apparatus of this invention. It is a figure which shows typically the principle of the equal distribution process by the rolling element equal distribution apparatus of this invention. It is a longitudinal cross-sectional view which shows the other structural example of the rolling element equal distribution apparatus of this invention. It is a longitudinal cross-sectional view which shows the structure of the rolling element equal distribution apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Rolling element equal distribution apparatus 2 Holding part 3 Magnet 11 Moving apparatus 12 Rotating apparatus B Rolling bearing IR Inner ring O Axis OR Outer ring R Rolling element

Claims (7)

A rolling element equalizing device used for manufacturing a rolling bearing in which a plurality of rolling elements are arranged between an inner ring and an outer ring arranged coaxially,
A holding part that supports the inner ring and the outer ring, in which the rolling elements are arranged between each other, in a direction in which the respective axes are perpendicular to each other, and supports the inner ring and the outer ring,
Magnets disposed on both sides in the axial direction of the inner ring and the outer ring held by the holding part ,
A magnet disposed on one side in the axial direction is formed in a columnar shape facing the inner ring,
A rolling element equalizing device in which a magnet disposed on the other side in the axial direction is formed in an annular shape facing the outer ring . The rolling element equalizing device according to claim 1, wherein the magnet is an electromagnet.   3. The rolling element distribution device according to claim 1, wherein the columnar magnet is formed in a columnar shape having a dimension in the magnetic pole direction larger than a dimension in a direction orthogonal to the direction of the magnetic pole. .   4. The rolling element according to claim 1, wherein an end portion of the magnet formed in a columnar shape that faces the inner ring is circular as viewed from a cross section perpendicular to the direction of the magnetic pole. 5. Uniform equipment. 5. The rolling element distribution device according to claim 1, further comprising: a rotation device that relatively rotates the inner ring and the outer ring held by the holding unit around the axis. 6. The rolling element equidistant arrangement according to any one of claims 1 to 5, further comprising an imaging device that photographs the rolling element between the inner ring and the outer ring through a central hole of the magnet formed in an annular shape. apparatus.   The rolling element equalizing device according to claim 6, further comprising: a control device that controls the rotating device based on an image acquired by the imaging device.

Images