JP2002235761A - Adapter for rolling bearing and method for mounting rolling bearing using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter capable of easily securing a proper fastening amount when mounting the rolling bearing having the inner diameter surface of an inner race formed into a tapered hole on a shaft and a method for mounting the rolling bearing, using the adapter. SOLUTION: In this adapter for the rolling bearing in which the inner diameter surface of an inner race 2 constituted of an adapter sleeve 3 having the outer diameter surface forming a male screw 6 at one end side and a zoning part 7 in the shaft direction formed into a tapered shape, a lock nut 4 screwed into the male screw 6 and a washer 5 is formed into the tapered hole, angle indexes 14a and 14b showing a proper fastening angle of the lock nut 4 from a reference position set in the zoning part 7 are provided on the end face of the adapter sleeve 3, a position index 12 corresponding to the reference position is marked on the end face of the lock nut 4 at a retightening starting position, and the fastening amount is made proper by retightening and adjusting the position index 12 between the angle indexes 14a and 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adapter for a rolling bearing for mounting a rolling bearing having a tapered inner ring inner surface to a shaft, and a mounting method using the adapter.

[0002]

2. Description of the Related Art Generally, a self-aligning rolling bearing in which the outer raceway and the rolling element make a normal contact with each other even when the outer race is inclined with respect to a roller or an inner race with a ball has a cylindrical bore bearing directly mounted on the shaft. The advantage is that the dimensional tolerance of the shaft can be increased compared to that of the above, and it is convenient for attachment and detachment.Therefore, the inner ring inner diameter surface which is attached to the shaft via a taper sleeve, that is, an adapter sleeve or a removal sleeve, is tapered. Hole bearings are often used.

[0003] Conventionally, an example in which a self-aligning rolling bearing having a tapered inner ring inner surface is mounted on a shaft is as follows.
The inner diameter surface is cylindrical, the outer diameter surface is a tapered surface, and a male screw is formed on the small end diameter side. An adapter sleeve having a single split in the axial direction is fitted to the shaft. Next, the self-aligning rolling bearing is mounted on the adapter sleeve, and a lock nut is screwed into a male screw on the small end diameter side of the adapter sleeve via a washer for preventing rotation, so that a radial internal clearance of the bearing, that is, an inner diameter of the outer ring. The lock nut is tightened until the amount of change in the clearance between the surface and the rolling element before and after the tightening or the amount of relative axial movement between the bearing and the adapter sleeve reaches a predetermined value. Then, the locking pawl provided on the peripheral edge of the washer is bent into a cutout provided on the lock nut, and if necessary, the bent pawl is locked with a clasp to complete the mounting.

The amount of change in the radial internal gap is calculated based on the measured value of the gap between the inner surface of the outer ring and the rolling element by a thickness gauge before and after the tightening. The relative axial movement amount is based on the tightening angle of the lock nut, and the following formula is used. Relative axial movement amount = (pitch of female screw of lock nut) × (tightening angle of lock nut (°)) / 360 (°) Calculated by (1).

[0005] In the equation (1), the tightening angle of the lock nut is a rotation angle from a position where the lock nut is turned until there is no play in the washer.

Thus, using the adapter sleeve,
As a management item for properly mounting a self-aligning rolling bearing having a tapered inner ring inner surface to a shaft, a change amount of a radial internal gap before and after tightening a lock nut or a relative axial movement amount is used.

[0007]

However, according to the method of managing and changing the amount of change in the radial internal clearance, when the rolling element and the outer ring are not in a normal position, that is, when the rollers or balls and the outer ring are settled down. Otherwise, the radial internal clearance cannot be measured accurately, which may cause insufficient tightening of the lock nut, that is, insufficient pushing of the bearing into the adapter sleeve. Due to the insufficient tightening of the lock nut, relative slippage occurs between the adapter sleeve and the bearing inner ring, causing wear and seizure at the interface between them and the radial internal clearance becoming larger than appropriate, resulting in vibration and acoustic noise. And the bearing load is applied by a small number of rolling elements, which may cause adverse effects such as shortening of the bearing life.

On the other hand, in the method of controlling and mounting the relative axial movement amount of the adapter sleeve and the bearing, the tightening angle of the lock nut is usually grasped by visual measurement, and the relative axial movement amount is calculated by the above equation (1). In some cases, the relative axial movement amount cannot be accurately grasped due to errors in the tightening angle due to visual measurement or erroneous calculations. For this reason, the above-mentioned adverse effect due to insufficient tightening of the lock nut, or the adverse effect due to excessive tightening, that is, excessive pressing of the bearing into the adapter sleeve causes the radial internal gap to be smaller than an appropriate value, causing heat generation and seizure. There is a possibility that adverse effects such as shortening of the bearing life will occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide an adapter which can easily secure an appropriate amount of tightening when a rolling bearing having an inner ring inner surface with a tapered hole is mounted on a shaft, and a rolling bearing using the adapter. Is to provide a mounting method.

[0010]

In order to solve the above-mentioned problems, the present invention employs the following configuration.

That is, a male screw is formed at one end, and a cut portion is formed at one location in the axial direction. In a rolling bearing adapter comprising a lock nut for fastening a rolling bearing having an inner ring inner diameter surface to a tapered hole and fixing the shaft to a shaft, and a locking member for preventing the lock nut from rotating, a required reference is provided to an end of the tapered sleeve. The position was set, and an angle index indicating an appropriate tightening angle of the lock nut from the reference position was provided at the end.

As described above, the proper rotation angle of the tapered sleeve from the reference position, that is, the proper tightening angle, which is necessary for optimizing the tightening amount, is determined by measuring the change amount of the radial gap before and after the tightening and the tightening angle. If it is grasped in advance from the relationship and marked on the end of the taper sleeve, at the time of mounting, at the retightening start position, a position index corresponding to the reference position is marked on the outer surface of the lock nut, and The tightening amount of the lock nut can be easily adjusted simply by increasing the position index to the angle index and adjusting it.
As a result, as described above, it is not necessary to actually measure the radial internal gap or to calculate the relative axial movement amount, and it is possible to prevent the above-described adverse effects due to insufficient or excessive tightening of the lock nut.

Here, the taper sleeve is fitted to the shaft, and the bearing is fastened by a lock nut to be mounted, and the taper sleeve is fastened by a lock nut between the bearing inserted into the shaft and the shaft. Include both removal sleeves.

The retightening start position is a position where the lock nut is turned until there is no play in the rotation preventing member such as a washer, and the tightening angle of the lock nut is:
This is the angle of retightening.

It is preferable that the reference position is set at the slit, and the angle index is provided at a position indicating a maximum value and a minimum value of an appropriate tightening angle of the lock nut from the reference position.

With this configuration, the reference position can be easily set, and the locking is performed such that the position index marked on the lock nut falls between the two angle indexes corresponding to the maximum value and the minimum value of the appropriate tightening angle. Since it is sufficient to retighten the nut, even if there is some variation in the tightening angle of the lock nut, an appropriate amount of tightening can be easily secured, and workability at the time of mounting the bearing is remarkably improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rolling bearing adapter according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a configuration in which a self-aligning roller bearing 1 is mounted on a shaft using the rolling bearing adapter. The inner diameter surface of an inner ring 2 of the bearing 1 is a tapered hole. I have. The adapter is a combination of a taper sleeve, that is, an adapter sleeve 3, a lock nut 4, and a washer 5 as a rotation preventing member. An outer diameter surface of the adapter sleeve 3 is formed in a tapered shape.
Are formed respectively. Notches 8 are formed on the outer peripheral edge of the lock nut 4 at 90 ° intervals.
A locking claw 5a radially provided on the outer periphery of the washer 5 is fitted. On the inner peripheral surface of the washer 5, a detent claw 5 b that fits into the slit 7 is formed. The spherical roller bearing 1 is attached to the shaft 9 by these adapters.

FIGS. 2 and 3 show the self-aligning roller bearing 1.
Is attached to the shaft 9. The adapter sleeve 3 has its notch 7 widened by a wedge jig and is easily fitted on the shaft 9. The self-aligning roller bearing 1 is fitted on the adapter sleeve 3 through the washer 5 before and after tightening. , That is, the amount of change in the gap between the radial inner surface of the bearing 1 and the inner surface 11 of the outer ring 10 falls within a predetermined range.
Then, the detent claw 5a of the washer 5 is bent into the notch 8 of the lock nut 4, and the bearing 1 is fastened to the adapter sleeve 3 and fixed to the shaft 9 to complete the mounting.

When tightening the lock nut 4, first, the lock nut 4 is turned until there is no play in the washer.
At this position, that is, the retightening start position, a linear position index 12 is marked on the end face of the lock nut 4 corresponding to the reference position set at the center of the cut portion 7 in the width direction. An appropriate rotation angle of the lock nut 4 from the reference position, that is, an appropriate tightening, is provided on the end surface 13 of the adapter sleeve 3 where the male screw 6 is formed, in accordance with a predetermined range of a change amount before and after the tightening of the radial internal gap. Angle indicators 14a and 14b indicating the maximum value and the minimum value of the angle are provided. The angle indices 14a and 14b are obtained by grasping in advance the relationship between the measured value of the amount of change in the radial internal gap before and after the tightening of the lock nut 4 by a thickness gauge and the tightening angle of the lock nut 4 from the position index 12. be able to.

As described above, the tightening angle of the lock nut 4 is the additional tightening angle from the reference position. Further, the reference position may be set on a wall surface of the slit 7.

The embodiment of the present invention is configured as described above, and its operation will be described below.

As described above, in order to optimize the amount of tightening of the lock nut 4, the angle indicators 14a and 14b indicating the proper range of the tightening angle from the reference position set at the center of the slit 7 in the width direction are used. As shown in FIG. 3, the position index 12 marked on the lock nut 4 at the retightening start position corresponding to the reference position is located between these two angle indexes 14a and 14b. By simply tightening the lock nut 4, the appropriate amount of tightening to keep the radial internal clearance within an appropriate range can be realized very easily.
As a result, it is not necessary to actually measure the radial internal gap or calculate the relative axial movement amount, so that the workability at the time of mounting the bearing is improved, and the above-described adverse effect due to insufficient or excessive tightening of the lock nut is prevented. be able to.

The inner diameter of the adapter sleeve 7 is 2
In the case of 00 mm or more, as shown in FIG. 4, instead of the washer 5 as a detent member, a lock 15 is fitted to the slit 7 and the lock nut properly tightened as described above. 4, and the bolt 16 is screwed into a screw hole formed in the end surface to prevent rotation.

FIG. 5 shows a rolling bearing adapter according to another embodiment of the present invention. The tapered sleeve is replaced with the adapter sleeve 3 used in the embodiment (see FIGS. 1 and 2). The removal sleeve 17 shown in FIG. 6 is used. The detachable sleeve 17 has a male thread 6 formed on the large end diameter side, and similarly to the adapter sleeve 3, a single cut portion 7 is formed in the axial direction. Then, similarly to the case of the adapter sleeve 3, a notch-shaped angle index 14c indicating the maximum value and the minimum value of the proper tightening angle of the lock nut 4 is provided on the end surface of the removal sleeve 17.
14d is provided.

When using the removal sleeve 17,
First, the bearing 1 and the removal sleeve 17 are provided with the male screw 6 at the end.
a is inserted into the shaft 9 on which the shaft a is formed, and the end surface of the inner ring 2 of the bearing 1 abuts on a shoulder 18 provided on the shaft 9. Then, as in the case of the above-described embodiment, the lock nut 4 is screwed into the male screw 6a and turned until the play of the washer 5 is eliminated. A linear position indicator is marked on the side surface of the lock nut 4 corresponding to the position, and this position indicator is
7, the notch-shaped angle indicators 14c, 14
By tightening the lock nut 4 so as to enter the space d, the radial gap of the bearing 1 can be kept within an appropriate range. In this case, the lock nut 4 is in contact with the end surface of the detaching sleeve 17 where the angle indicators 14c and 14d are provided. However, since the angle indicators 14c and 14d are formed in a notch shape, the These angle indicators 14c and 14d can be confirmed from the side. Further, the removal sleeve 17 can be removed by removing the lock nut 4, fitting a removal sleeve nut (not shown) into the male screw 6 on the large end diameter side, and tightening.

As the above-mentioned bearing adapter, it is also possible to use a hydraulic bearing adapter which has been subjected to processing such as providing an oil supply hole and an oil groove in the tapered sleeve. These bearing adapters can be used not only for self-aligning rolling bearings, but also for rolling bearings such as tapered roller bearings and cylindrical roller bearings in which the inner ring inner surface has a tapered hole.

[0028]

[Example] The inner diameter of the inner ring is φ90 mm, and the inner diameter is 1/12
The angle indicators 14a, 14b indicating the proper tightening angle range of the lock nut 4 of the double row spherical roller bearing 1 having the taper described above, ie, the maximum value and the minimum value of the appropriate tightening angle.
Is determined from the relationship between the measured value of the change amount of the radial internal gap before and after the tightening and the tightening angle from the reference position set at the center in the width direction of the slit 7 as described above,
The end faces of the adapter sleeve 3 are provided at positions of 126 ° and 162 ° from the reference position, respectively. First, the lock nut 4 is turned until the play of the washer 5 disappears. At this position, that is, at the re-tightening start position, the position index 12 corresponding to the reference position is marked on the end face of the lock nut 4, and the angle index 14a is obtained. , 14b was turned by 6 ° more than the position of the position index marked. However, the range of the proper tightening angle of the lock nut 4 is 126 ° to 162 ° as described above, and there is an allowable range of ± 18 ° with respect to the median value. Fits. in this way,
If the lock nut 4 is tightened so that the position index 12 is positioned at the center of the angle indexes 14a and 14b, even if the retightening start position slightly changes during the mounting operation, a tightening amount capable of securing an appropriate radial internal clearance. It has been confirmed that can be realized.

[0029]

As described above, according to the present invention, when a rolling bearing such as a self-aligning roller bearing having a tapered bore on the inner ring inner surface is attached to a shaft by tightening a lock nut through a tapered sleeve, the taper is reduced. At the end of the sleeve, an angle index indicating the maximum value and the minimum value of the proper tightening angle of the lock nut from the reference position set in the slit portion is provided, and at the retightening start position corresponding to the reference position, the locking is performed. A position indicator is marked on the outer surface of the nut, and the lock nut is tightened so that the position indicator falls between the angle indicators.Therefore, a proper tightening amount can be easily secured, and workability at the time of mounting the bearing is remarkable. improves.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rolling bearing adapter and a bearing according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view showing a mounting state of a bearing using the above-mentioned rolling bearing adapter.

FIG. 3 is a cross-sectional front view of the mounted state shown in FIG. 2;

FIG. 4 is a longitudinal sectional side view when a stopper is used as a rotation preventing member of a lock nut in a mounting state of the bearing shown in FIG. 2;

FIG. 5 is a longitudinal sectional side view showing a mounting state of a bearing using a rolling bearing adapter according to another embodiment of the present invention.

FIG. 6 is a perspective view of a detachment sleeve used in the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-aligning roller bearing 2 Inner ring 3 Adapter sleeve 4 Lock nut 5 Washer 5a, 5b Claw 6 Male screw 7 Notch part 8 Notch part 9 Axis 10 Outer ring 11 Roller 12 Position index 13 End face 14a, 14b, 14c, 14d Angle index 15 Clasp 16 Bolt 17 Removal sleeve 18 Shoulder

Claims (3)

[Claims] An external thread is formed at one end, and a cut portion is formed at one position in the axial direction. The tapered sleeve has a tapered outer diameter surface, the tapered sleeve fitted to the shaft, and the tapered sleeve. In a rolling bearing adapter comprising a lock nut for fastening a rolling bearing having an inner ring inner diameter surface to a tapered hole and fixing the shaft to a shaft, and a locking member for preventing the lock nut from rotating, a required reference is provided to an end of the tapered sleeve. A rolling bearing adapter, wherein a position is set, and an angle index indicating an appropriate tightening angle of the lock nut from the reference position is provided at the end. 2. The method according to claim 1, wherein the reference position is set at the cut portion.
The rolling bearing adapter according to claim 1, wherein the angle index is provided at a position indicating a maximum value and a minimum value of an appropriate tightening angle of the lock nut from the reference position. 3. A rolling bearing adapter according to claim 1 or 2, further comprising:
The outer surface is marked with a position index corresponding to the reference position set at the end of the tapered sleeve, and the position index is additionally tightened to the angle index provided at the end of the tapered sleeve, thereby tightening the lock nut. The method of mounting the rolling bearing so that it is optimized.