JP7256933B2 - How to install bearings. - Google Patents

Description

The present invention relates to a method of mounting bearings.

In conventional bearing mounting, either the inner ring or the outer ring was directly fixed to the housing.

Patent application 2019-114099

In the bearing of the patent document, when the bearing rotates, the number of revolutions at which the large-diameter portion of the rolling element inscribed in the outer ring rotates once around the outer ring, and the small-diameter portion of the rolling element in contact with the inner ring rotates the inner ring. Since the number of revolutions for one revolution is the same, the position of the rolling elements does not move even after one revolution of the bearing ring, so there is no rotational resistance to the rolling elements.
In conventional bearings, the diameter of the rolling elements is the same, but the length of the outer and inner rings is different. When the bearing ring is fixed, the rolling elements move in the direction of rotation of the outer bearing ring, which has a long distance between the bearing rings, so there is a problem that rotational resistance is generated in the bearing.

SUMMARY OF THE INVENTION The present invention solves the above problems and provides a method of mounting a bearing so that both the inner and outer races of the bearing are rotatable with respect to the housing.

According to the present invention, the mounting of the raceway rings of the bearing, which has conventionally been directly fixed to the housing, can be changed so that both the inner raceway ring and the outer raceway ring are rotatable relative to the housing. As a result, the moving distances of the inner ring and the outer ring, in which the rolling elements rotate, can be made the same, so that the rotational resistance generated in the bearing can be prevented.

Side cross-sectional view of a state in which the ball bearing is rotatably attached to the housing using metal. Front view of a state in which a bearing is rotatably attached to a housing using metal. FIG. 2 is a side cross-sectional view of a state in which a roller bearing is rotatably attached to a housing using a needle bearing; A cross-sectional side view of a state in which a pulley with a bearing is rotatably attached using metal. A front view of a state in which a pulley with a bearing is rotatably attached using metal. A cross-sectional side view of a state in which a pulley with a bearing is rotatably attached using a needle bearing. Schematic front view of the bearing showing the direction of movement of the rolling elements Vector diagram showing the moving direction of the rolling elements

In FIG. 7, the diameter of the inner ring is 50, the diameter of the rolling elements is 10, and the diameter of the outer ring is 70. FIG. (Numbers are ratios, not lengths.) Let pi be the circumference. Since the moving distance of the rolling elements is only half the moving distance of the bearing ring, when the outer bearing ring diameter 70 rotates twice and moves by a distance of 140π, the inscribed rolling element diameter 10 rotates 7 times to reach the outer bearing ring. is moved by 70π. When the inner ring diameter 50 rotates twice and moves a distance of 100π, the circumscribed rolling element diameter 10 rotates five times and the inner ring moves 50π. When the outer ring is fixed and the inner ring rotates clockwise, the rolling elements move counterclockwise by a distance of 10π for one rotation of the rolling element as shown in [Fig. 7] and [Fig. 8]. has rotational resistance. When mounting the bearing in the housing, if both the inner and outer rings are rotatable, the distances traveled by the inner and outer rings, in which the rolling elements rotate, will be the same. Since it is possible to prevent the movement of the rolling elements in the direction opposite to the driven bearing ring, it is possible to prevent the occurrence of rotational resistance in the bearing.
FIG. 1 is a cross-sectional side view showing a state in which 3 outer races of a bearing are rotatably attached to 5 housings by 4 metals (sliding bearings) . Both the 3 outer rings and 1 inner ring of the bearing are pivotally attached to the 5 housing .
FIG. 2 is a front view of FIG. 1, in which the 3 outer races of the bearing are rotatably attached to the 5 housing;
[Fig. 3] Fig. 3 is a cross-sectional side view of a state in which 3 outer rings of a bearing are rotatably attached to 5 housings by 9 needle bearings (rolling bearings). Both the 3 outer and 1 inner rings of the bearing are pivotally mounted to the 5 housing by means of 10 needles of the bearing .
[Fig. 4] Fig. 4 is a side cross-sectional view showing a state in which 13 pulleys with 3 outer races of a bearing integrally fitted are rotatably attached to 5 housings by means of 4 metals (slide bearings). Even if the 3rd outer ring of the bearing rotates , both the 1st inner ring and the 3rd outer ring of the bearing are rotatably attached to the housing 5 by the 4 metal (slide bearing) .
FIG. 5 is a front view of a state in which one inner race of pulley 13, in which three outer races are integrally fitted, is rotatably attached to housing 5 by means of metal 4 (slide bearing) ;
[Fig. 6] Fig. 6 is a cross-sectional side view showing a state in which 13 pulleys with 3 outer races of the bearings fitted together are rotatably attached to 5 housings by means of 9 needle bearings (rolling bearings). Both the 1st inner ring and the 3rd outer ring of the bearing are rotatably attached to the housing 5 by the 10 needles of the 9 needle bearing (rolling bearing) even if the 3rd outer ring of the mounted bearing rotates.

Although the embodiments have been described in detail above, the present invention is not limited to such embodiments, and can be arbitrarily changed in details such as configuration, shape, arrangement, materials, etc. within the scope of the present invention. can.

1 Inner race 2 Rolling element 3 Outer race 4 Metal 5 Housing 6 Shaft 7 Metal clamp 8 Metal clamp mounting bolt 9 Needle bearing 10 Needle 11 Mounting bolt 12 Mounting washer 13 Pulley

Claims (1)

A bearing having an outer ring , an inner ring , and rolling elements in contact with the outer ring and in contact with the inner ring ,
A method of arranging a metal or needle bearing in the housing on the side of the bearing ring that is conventionally fixed to the driven bearing ring so that both the inner and outer bearing rings are rotatable relative to the housing.

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