JPS6113772Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for fixing a bearing ring of a rolling bearing.

In precision spildons and the like that use rolling bearings, it is common practice to fix the outer ring to the housing by pressing the side surface of the outer ring fitted into the inner hole of the housing with a lid. This type of fixing means for rolling bearings has the disadvantage that it requires a large amount of man-hours to assemble the bearing because it is necessary to match the lid for each spiel don to be assembled and adjust the tightening allowance of the lid to the housing to a predetermined value. It was hot.

If the tightening allowance of the lid body against the housing is too small, there will be insufficient force to press the outer ring in the axial direction, which tends to reduce the supporting rigidity of the outer ring in the axial direction.If the tightening allowance is too large, the outer ring If you tighten the lid with an appropriate force, the housing and the lid will not come into close contact with each other. In such a situation, when using the Spirudon, the tightening bolts on the lid will loosen, which will easily impair the performance of the Spirudon, and if you tighten the lid too tightly, the outer ring will The pressing force is excessive and tends to deform the outer ring, causing problems such as vibration and heat generation in the spill-don.

This invention was made to eliminate the above-mentioned conventional drawbacks, and its purpose is to maintain the bearing raceway in the optimal axial direction even if there are variations in dimensions of the raceway pressing member such as the lid. To provide a bearing ring fixing device that can be fixed by pressing.

In order to achieve this objective, this invention interposes a special spacer between the bearing ring and a member such as a lid that presses the bearing ring from the axial direction.

Next, an embodiment of the bearing ring fixing device according to this invention will be described with reference to the drawings.

This embodiment shows that a shaft 3 is supported by two rolling bearings 1 and 2. Bearing 1 has a ball 6 that can freely roll between an outer ring 4 and an inner ring 5, and bearing 2 has a ball 6 that can freely roll between an outer ring 4 and an inner ring 5. A freely rolling ball 9 is provided between an outer ring 7 and an inner ring 8. Outer rings 4 and 7 are housing 1
0, and are spaced apart in the axial direction by a spacer 12.

The inner rings 6 and 9 fit onto the shaft 3 and are separated in the axial direction by a spacer 13.

One end surface of the outer ring 7 is in contact with a stepped portion 14 of the housing 10.

One end surface of the inner ring 6 is in contact with a stepped portion 15 of the shaft. One end of the inner ring 9 is pressed by a spacer 16, and the inner rings 6 and 9 are pressed against the shaft 3.
is fixed.

An inner hole 11 of the housing is provided on one end surface of the outer ring 4.
The end face of the ring body 17 which is loosely fitted in is in contact with the ring body 17. A groove 18 with a narrow inner side is formed in the circumferential direction on the side surface of the annular body 17, and a number of balls 19 are engaged with this groove 18, and the balls 19 protrude laterally from the annular body 17. The body 17 and the ball 19 constitute a spacer 20. The ball 19 of the ring body 17 is
The inner end surface 23 of the lid body 22 is fixed to the end surface of the housing 10 by bolts 21 .

With this configuration, the shaft 3 is supported by the housing 10 by the bearings 1 and 2 and is rotatable.

The assembled height of the spacer 20 in its free state is greater than the distance between the outer ring 4 and the lid 22, and when the lid 22 and the bolts 21 are tightened to the housing, from the point where there is no play, ball 1
9 widens the groove 18 which is narrowed on the inside of the ring body 17, and the ring body 17 bulges outward and inside.

By expanding the outer surface of the ring body 17, the ring body 1
7 exerts pressure on the inner surface 10 of the housing, so that a frictional resistance acts between the housing 10 and the ring body 17. Even if the pushing amount of the balls 19 varies, the ring body 17 elastically deforms inwardly, so the axial bearing ring pressing force that presses the outer rings 4 and 7 of the bearing will never exceed a predetermined value. do not have.

By appropriately selecting the wall thickness of the annular body 17, the angle of the groove 18 having a narrowed inner side, etc., the raceway ring can be fixed with approximately the desired axial pressing force.

Although this embodiment shows an example in which the outer ring of a rolling bearing is fixed, it is of course applicable to the case where the inner ring is fixed.

The rolling bearing raceway fixing device of this invention constructed as described above includes an annular body having a side surface in which a groove with a narrow inner side is formed in the circumferential direction, and a large number of rings that engage with the grooves of this annular body. A spacer equipped with a ball is placed between the raceway ring and the member that presses the raceway ring to secure the bearing raceway, so even if there are slight variations in the tightening distance of the raceway ring tightening member, it will be almost the same. The bearing ring can be fixed with a uniform force, there is no need to assemble the bearing ring tightening member like in the past, and assembly is easy, so it has the effect of making it possible to assemble the bearing ring of a rolling bearing at low cost. have

Furthermore, since a frictional force acts on the circumferential surface of the annular body, there is an effect that even if the mounting bolts of the raceway tightening member such as the lid body are made small, there is no problem of bolt loosening.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a bearing ring fixing device for a rolling bearing according to this invention, and FIG. 2 is a perspective view of the parts shown in FIG. 1. 1, 2...Rolling bearing, 3...Shaft, 10...
Housing, 7... Ring body, 18... Groove with narrowed inside, 19... Ball, 22... Lid body.

Claims (1)

[Scope of utility model registration request] A spacer comprising a ring body having a side surface with a groove formed in the circumferential direction with a narrow inner side, and a number of balls that engage with the groove of the ring body and protrude from the ring body is connected to the bearing raceway. A bearing ring fixing device for a rolling bearing, characterized in that the bearing ring of the rolling bearing is fixed by being disposed between the bearing ring pressing member that presses the bearing ring.