JPH06200933A - Supporting structure of rolling bearing - Google Patents

Abstract

PURPOSE:To constantly and surely suppress the vibration irrespective of the change in the environmental temperature by forming a U-shaped elastic body of spring steel or of shape memory alloy in an integrated manner in a roller bearing where the U-shaped elastic body is arranged at least on either of the counter track surface and the end surface of the inner/outer rings. CONSTITUTION:A roller body 4 is interposed in a rotational manner between an inner ring 2 and an outer ring 3 which are the bearing rings of a roller bearing 1. The inner ring 2 is fitted with a rotary shaft 5. Further, the outer ring 3 is fitted with a housing 6 through the specified clearance 7. A plurality of U-shaped elastic bodies 10 which are formed so as to cover the counter track surface 8 of the outer ring 3 and its following end surface 9 and the housing 6 are mounted on the circumference of the clearance 7. On this case the U-shaped elastic bodies 10 are formed in an integrated manner by using the shape memory alloy. When the clearance 7 is changed according to the change of the environmental temperature, the U-shaped elastic bodies 10 is transformed so as to absorb this change, preventing the looseness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing support structure used in space-related equipment and the like.

[0002]

2. Description of the Related Art A conventional rolling bearing support structure is a bearing formed by rolling elements between an inner ring and an outer ring,
Insert the inner ring anti-raceway surface into the rotating shaft and fit the outer ring anti-raceway surface into the housing. The inner ring anti-raceway surface of the bearing and the rotary shaft are attached by interference fit, and the other outer ring anti-raceway surface is attached by a clearance fit that fits with a support structure such as a housing with a certain clearance. . This is to prevent an excessive load from being applied to the rolling elements due to the interference.

When such a support structure is used in an environment having a wide operating temperature range such as outer space, a difference in coefficient of thermal expansion occurs between the material of the outer ring and the material of the support structure, so that the clearance varies depending on the temperature. Since it changes, it must be installed with some clearance. That is, there is a problem that rattling occurs.

Further, when the bearing is operated as described above, it may vibrate. If such vibration is left as it is, the vibration eventually grows due to resonance and the like, and the operation of the bearing support structure is not smoothly performed.

As disclosed in Japanese Unexamined Patent Publication (Kokai) No. 3-92618, a rolling bearing in which two ceramic coating layers having a low thermal conductivity are formed on either the outer surface of the rolling bearing or the inner surface of the inner bearing is known. It is known.

[0006]

The above-mentioned conventional supporting device is effective for supporting heat insulation in an environment such as outer space having a wide operating temperature range, but is not effective for suppressing vibration when it receives vibration. Not in.

It is an object of the present invention to provide a rolling bearing support structure which realizes both adiabatic support under a wide operating temperature environment and vibration suppression during operation.

[0008]

According to the present invention, a U-shaped or L-shaped elastic body that covers at least one of the inner and outer races on the side opposite to the raceway surface and the end surface and the housing is integrally molded to insulate the rolling bearing. , And a vibration suppressing effect.

[0009]

With the above-described support structure, the anti-raceway surface of the inner ring or outer ring to which the rotary shaft is not fitted is U-shaped or L-shaped.
It is always pressed against the support structure by being pressed by the elastic body in a radial shape in the radial and axial directions by a spring force. Therefore, even if the clearance between the anti-raceway surface of the inner ring or outer ring and the support structure changes, the same heat insulation,
A vibration suppressing effect is provided and a clearance is prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a support structure of a rolling bearing, in which a rotatable rolling element 4 is interposed between an inner ring 2 and an outer ring 3 which are races of a rolling bearing 1. The inner ring 2 is fitted to the rotating shaft 5. The outer ring 3 is the housing 6 of the support structure.
Is fitted with a predetermined clearance, and the U-shape is formed in this clearance 7 so as to cover the anti-raceway surface 8 of the outer ring 3 which is a component of the rolling bearing 1, the end surface 9 following this, and the housing 6. Several mold elastic bodies 10 are attached on the circumference.

The clearance 7 and the amount of deflection of the U-shaped elastic body 10 are set in consideration of the difference in the coefficient of thermal expansion between the rolling bearing 1 and the housing 6 and the operating environment temperature.

The anti-raceway surface 8 and the end surface 9 of the rolling bearing 1 are U
It is pressed against the housing 6 by the spring force of the V-shaped elastic body 10. When the environmental temperature changes, the clearance 7 changes due to the difference in thermal expansion between the rolling bearing 1 and the housing 6.
However, since the anti-raceway surface 8 and the end surface 9 of the rolling bearing 1 are elastically supported by the U-shaped elastic body 10, they are pressed against the housing 6. Further, even when vibration occurs during operation, it is elastically supported similarly to the above.

As described above, the support structure can absorb the change in clearance by the U-shaped elastic body 10 installed in the clearance 7 between the anti-raceway surface 8 and the end surface 9 and the housing 6 as the temperature changes. It is possible to prevent rattling.

FIG. 2 shows another example of the support structure of the rolling bearing, in which a rotatable rolling element 4 is interposed between an inner ring 2 and an outer ring 3 which are race rings of the rolling bearing 1. There is.
The inner ring 2 is fitted to the rotating shaft 5. The outer ring 3 is fitted into the housing 6 of the support structure with a predetermined clearance, and in this clearance 7, the anti-raceway surface 8 and the end surface 9 of the outer ring 3 and the housing 6 are fitted.
Several L-shaped elastic bodies 10 ', which are attached so as to press a part of them, are attached on the circumference.

The clearance 7 and the amount of deflection of the L-shaped elastic body 10 'are set in consideration of the difference in the coefficient of thermal expansion and the operating environment temperature, as described above.

The anti-raceway surface 8 and the end surface 9 of the rolling bearing 1 are L
It is pressed against the housing 6 by the spring force of the V-shaped elastic body 10 '. When the environmental temperature changes, the clearance 7 changes due to the difference in thermal expansion between the rolling bearing 1 and the housing 6. However, the anti-raceway surface 8 and the end surface 9 of the rolling bearing 1 are L
Since it is elastically supported by the character-shaped elastic body 10 ′, it is pressed against the housing 6. Further, even when vibration occurs during operation, it is elastically supported similarly.

As described above, the support structure can absorb the amount of change in the clearance due to the L-shaped elastic body 10 'installed in the clearance 7 between the housing 6 and the anti-raceway surface 8 and the end surface 9 as the temperature changes. Therefore, rattling can be prevented.

Further, the present invention can be applied not only to space-related equipment but also to various temperature environments such as on the ground.

[0019]

According to the present invention, it is possible to provide a support structure for a rolling bearing which realizes adiabatic support in an environment having a wide operating temperature range and vibration suppression during operation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a rolling bearing support structure of the present invention.

FIG. 2 is a longitudinal sectional view of a rolling bearing support structure of the present invention.

[Explanation of symbols]

1 ... Rolling bearing, 2 ... Inner ring, 3 ... Outer ring, 4 ... Rolling element, 5
... rotary shaft, 6 ... housing, 7 ... clearance, 8 ... anti-raceway surface, 9 ... end face, 10 ... U-shaped elastic body, 10 '... L-shaped elastic body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Sato 502 Jinritsu-cho, Tsuchiura-shi, Ibaraki Hiritsu Seisakusho Co., Ltd.Mechanical Research Laboratory (72) Inventor Yoichi Murai 502 Jinritsu-cho, Tsuchiura-shi, Ibaraki Niritsu Seisakusho Co., Ltd. Inside the Mechanical Research Laboratory (72) Inventor Taro Iwamoto 3-1-1 Sachimachi, Hitachi City, Ibaraki Hitachi Ltd., Hitachi Works

Claims (1)

[Claims] 1. A rolling bearing having a U-shaped elastic body on the opposite raceway surface side and the end surface of at least one of the inner and outer races,
A support structure for a rolling bearing, wherein the U-shaped elastic body is made of a spring steel material or a shape memory alloy and is formed in a U-shaped integral structure.