JP2546357Y2 - Bearing assembly - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing assembly for improving the assemblability of a pulsar ring.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, there is a bearing assembly in which a rolling bearing 3 is disposed between a shaft 1 and a main body 2. The rolling bearing 3 includes an inner ring 3a, a ball 3b, and an outer ring 3c. And body 2
, A sensor 4 is mounted, and a pulsar ring 5 is mounted on the shaft 1 side. The sensor 4 detects a rotation angle of the pulsar ring 5.

The pulsar ring 5 is press-fitted to a retainer ring 6 for locking the rolling bearing 3 and integrated with the retainer ring 6, and the retainer ring 6 is press-fitted to the shaft 1, so that the axial dimension is reduced. It can be made compact by suppressing it, and the assemblability is improved.

[0004]

However, when the pulsar ring 5 and the retainer ring 6 are integrated, when the retainer ring 6 is press-fitted to the shaft 1, the retainer ring 6 has a large tightening allowance. There is a problem that the ring 6 expands and an excessive circumferential stress acts on the pulsar ring 5, which may damage the pulsar ring 5. Further, for the same reason, there is a problem that the outer diameter of the pulsar ring 5 changes, and the detection accuracy of the pulsar ring 5 deteriorates.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bearing assembly which prevents damage to a pulsar ring, improves detection accuracy of the pulsar ring, and improves assemblability.

[0006]

In order to achieve the above object, a bearing assembly according to the present invention comprises a shaft, a body,
A rolling bearing disposed between the shaft and the main body, a retainer ring press-fitted to the shaft to axially support the rolling bearing; a pulsar ring press-fitted to the retainer ring; In a bearing assembly having a sensor attached to the pulsar ring and detecting a rotation angle of the pulsar ring, the retainer ring forms a cavity between the thick portion press-fitted to the shaft and the shaft, And a thin portion in which the pulsar ring is press-fitted. The bearing assembly according to claim 2 is a retainer for supporting the rolling bearing in the axial direction by press-fitting the shaft, a body, a rolling bearing disposed between the shaft and the body, and the shaft. In a bearing assembly having a ring, a pulsar ring press-fitted to the retainer ring, and a sensor attached to the main body and detecting a rotation angle of the pulsar ring, the retainer ring locks the pulsar ring. A pulsar ring fit that is a gap fit to the pulsar ring before being press-fitted to the shaft and a press fit to the pulsar ring when pressed to the shaft. It is characterized by having a part.

[0007]

According to the bearing assembly of the first aspect, a cavity is formed between the shaft and the thin portion of the retainer ring into which the pulsar ring is press-fitted. Therefore, when the retainer ring is press-fitted to the shaft, the thin portion does not contact the shaft. Therefore, the expansion of the thin portion is prevented,
The circumferential stress acting on the pulsar ring is suppressed.
According to the bearing assembly of the second aspect, the pulsar ring is gap-fitted to the retainer ring before being press-fitted to the shaft, and the pulsar ring is locked at the locking portion, and then the retainer ring is pressed to the shaft. Then, the retainer ring expands, the pulsar ring changes from the gap-fit state to the press-fit state, and the expansion of the retainer ring is absorbed by the gap, so that the circumferential stress acting on the pulsar ring is suppressed. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. Except for the retainer ring and the pulsar ring, the configuration is the same as that of the conventional example shown in FIG.

FIG. 1 shows a first embodiment. The thick portion 10e of the retainer ring 10 is press-fitted to the shaft 1. On the other hand, the thin portion 10 a of the retainer ring 10 forms a hollow portion 10 b having a depth d in the axial direction equal to or larger than the width w of the pulsar ring 11 between the shaft 1 and the thin portion 10 a.

According to the first embodiment, the pulsar ring 11 can be press-fitted into the thin portion 10a of the retainer ring 10 in advance and integrated, so that the assemblability of the pulsar ring 11 is improved. Thereafter, when the thick portion 10e of the retainer ring 10 is press-fitted onto the shaft 1, the retainer ring 1
0 expands. However, the thin portion 10a in which the pulsar ring 11 is press-fitted forms a hollow portion 10b with the shaft 1,
Since it does not directly contact the shaft 1, it hardly expands. Therefore, the circumferential stress acting on the pulsar ring 11 can be suppressed. Therefore, breakage of the pulsar ring 11 can be prevented. Further, the deformation of the pulsar ring 11 is suppressed, and the detection accuracy of the pulsar ring 11 can be improved.

FIG. 2 shows a second embodiment. Pulser ring fitting portion 12 of retainer ring 12 which is press fitted to shaft 1
The shoulder portion 12b is formed by forming a smaller in diameter than the outer diameter of the thick portion 12e of the retainer ring 12. A retaining ring groove 12c is provided on the outer periphery of the pulsar ring fitting portion 12a opposite to the shoulder portion 12b, and a retaining ring 14 as a locking portion is engaged with the retaining ring groove 12c.

According to the second embodiment, the pulsar ring 13 is previously fitted in the pulsar ring fitting portion 12a of the retainer ring 12 and locked by the shoulder portion 12b and the retaining ring 14, so that the retainer ring 12 Since they can be integrated, the assemblability of the pulsar ring 15 is improved. Thereafter, when the retainer ring 12 is press-fitted onto the shaft 1, the retainer ring 12 expands, and the pulsar ring 13 is brought into a press-fit state from the gap-fit state to the pulsar ring fitting portion 12a. At this time, the expansion of the retainer ring 12 is absorbed in the gap portion of the gap fitting, so that the circumferential stress acting on the pulsar ring 13 can be suppressed. Therefore, the pulsar ring 13 can be prevented from being damaged,
The deformation of the pulsar ring 13 is suppressed, and the detection accuracy of the pulsar ring 13 can be improved.

FIG. 3 shows a third embodiment. The shoulder portion 15b is formed by forming the thin pulsar ring fitting portion 15a of the retainer ring 15 that is press-fitted on the shaft 1 smaller in diameter than the outer diameter of the thick portion 15e of the retainer ring 15. A caulking groove 15c is provided on the outer periphery of the pulsar ring fitting portion 15a opposite to the shoulder portion 15b. The pulsar ring 16 is gap-fitted into the pulsar ring fitting portion 15a, and the pulsar ring 1 is inserted into the caulking groove 15c.
6 is engaged with a caulking portion 16a as a locking portion.

According to the third embodiment, the pulsar ring 16 is previously gap-fitted into the pulsar ring fitting portion 15a of the retainer ring 15, and the swaged end 16a of the pulsar ring 16 is swaged into the swage groove 15c. As described above, since the pulsar ring 16 is locked and integrated with the retainer ring 15 at the shoulder portion 15b and the swaged end portion 16a, the assemblability of the pulsar ring 16 is improved. Thereafter, when the retainer ring 15 is press-fitted to the shaft 1, the retainer ring 15 expands, and the pulsar ring 16 changes from the gap-fit state to the press-fit state. At this time, retainer ring 1
Since the expansion of 5 is absorbed by the gap fitting portion, the circumferential stress acting on the pulsar ring 16 can be suppressed. Thus, the pulsar ring 16 can be prevented from being damaged, the deformation of the pulsar ring 16 can be suppressed, and the detection accuracy of the pulsar ring 16 can be improved.

[0015]

As is apparent from the above description, the bearing assembly according to the first aspect of the present invention has a hollow portion formed between the thin portion of the retainer ring into which the pulsar ring is press-fitted and the shaft. It is. Therefore, when the retainer ring is press-fitted to the shaft, the thin portion does not contact the shaft, does not expand, and can suppress the circumferential stress acting on the pulsar ring. Damage can be prevented, and furthermore, deformation of the pulsar ring can be suppressed, and detection accuracy of the pulsar ring can be improved. Also, since the pulsar ring and the retainer ring can be integrated,
Improves pulsar ring assembly. Claim 2
In the bearing assembly of (1), the pulsar ring is gap-fitted to the retainer ring before being press-fitted to the shaft, and the pulsar ring is locked to the retainer ring by the locking portion of the retainer ring. When the retainer ring is press-fitted to the shaft, the expansion of the retainer ring causes the pulsar ring to change from the gap-fit state to the press-fit state, and the expansion of the retainer ring is absorbed by the gap portion of the gap fit. In addition, the circumferential stress acting on the pulsar ring can be suppressed. Therefore, the pulsar ring can be prevented from being damaged, and furthermore, the deformation of the pulsar ring can be suppressed, and the detection accuracy of the pulsar ring can be improved. In addition, since the pulsar ring and the retainer ring can be integrated, the assemblability of the pulsar ring is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a bearing assembly according to a first embodiment of the present invention;

FIG. 2 is a sectional view of a main part of a bearing assembly according to a second embodiment.

FIG. 3 is a sectional view of a main part of a bearing assembly according to a third embodiment;

FIG. 4 is a cross-sectional view of a conventional bearing assembly.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... shaft, 2 ... body, 3 ... rolling bearing, 4 ... sensor, 1
0,12,15 ... retainer ring, 10a ... thin part, 1
2a, 15a ... Pulsar ring fitting part, 11,13,16 ...
Pulsar ring, 12b, 15b ... shoulder, 14 ... retaining ring, 1
5c: caulked groove, 16a: caulked end.

Claims (2)

(57) [Scope of request for utility model registration] 1. A shaft, a main body, a rolling bearing disposed between the shaft and the main body, a retainer ring press-fitted to the shaft to support the rolling bearing in an axial direction, and the retainer ring. In a bearing assembly having a pulsar ring that is press-fitted onto the main body, and a sensor that is attached to the main body and detects a rotation angle of the pulsar ring, the retainer ring includes a thick portion press-fitted into the shaft, A hollow portion formed between the shaft and the shaft, and a thin-wall portion into which the pulsar ring is press-fitted. 2. A shaft, a main body, a rolling bearing disposed between the shaft and the main body, a retainer ring press-fitted to the shaft to axially support the rolling bearing, and a retainer ring. In a bearing assembly having a pulsar ring that is press-fitted onto the main body and a sensor that is attached to the main body and detects a rotation angle of the pulsar ring, the retainer ring includes a locking portion that locks the pulsar ring, Before being press-fitted to the shaft, the pulsar ring was provided with a pulsar ring fitting portion which was press-fitted to the pulsar ring while being press-fitted to the pulsar ring. A bearing assembly characterized by: