JP2597520Y2 - Anti-creep device for rolling bearings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a creep preventing device for a rolling bearing in which an elastic ring is interposed between the outer ring of the rolling bearing and the housing to prevent creep between the two.

[0002]

2. Description of the Related Art An eccentric groove is used as a creep preventing device for a rolling bearing (see Japanese Patent Publication No. 38-16404). Further, an eccentric groove is formed on the outer peripheral surface of an outer ring of a rolling bearing, There is known a configuration in which an elastic ring having a special shape is fitted and inserted into a minimum gap portion in a wedge shape. (See Japanese Utility Model Publication No. 59-490)

[0003]

However, since the elastic ring inserted between the eccentric groove of the outer ring of the rolling bearing and the housing and the outer periphery of both ends are in contact with the inner peripheral surface of the housing which has been machined smoothly, The elastic ring slips due to external factors such as severe vibration, and has a defect of sliding with the outer ring of the rolling bearing.

[0004] In order to eliminate these defects, in order to securely hold the elastic ring with respect to the housing, in order to increase the frictional resistance, it is important to form an arbitrary shape roughness on the inner peripheral surface of the housing. It is a technical task of the invention.

[0005]

The components required to solve the technical problems of the present invention are as follows. That is, in an apparatus in which an elastic ring is inserted into an eccentric circumferential groove provided on an outer peripheral surface of an outer ring of a rolling bearing and creep of the rolling bearing is prevented by frictional resistance between the elastic ring outer peripheral surface and a housing inner peripheral surface, The eccentric circumferential groove provided on the outer peripheral surface of the outer ring of the rolling bearing is formed smoothly over the entire peripheral surface and has a minimum depth formed shallower than the cross section of the elastic ring. At least one bulging portion having an inner peripheral surface and projecting radially from a maximum depth portion of the eccentric peripheral groove is formed.
That is, the inner peripheral surface is formed with a roughness of an arbitrary shape for increasing the frictional resistance with the outer peripheral surface of the elastic ring.

[0006]

The inner peripheral surface of the housing has a matte finish or a rough or jagged surface formed by ultrasonic machining, shot blasting, sand blasting, or the like, or is machined. A minimum gap between the groove having a smaller depth of the eccentric peripheral groove of the outer ring and the inner peripheral surface of the housing so that the inner peripheral surface of the housing engages with the matte finished surface or the jagged surface of the outer ring. And the frictional resistance between the two increases particularly, thereby preventing the outer ring from creeping.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which an elastic ring is inserted between an eccentric circumferential groove of a rolling bearing and a housing.

FIG. 2 is a partially omitted AA sectional view showing the relationship between the elastic ring and the eccentric peripheral groove inserted in FIG. 1 and the roughness formed on the inner peripheral surface of the housing. Reference numeral 10 denotes the entire rolling bearing.

Reference numeral 103 denotes rolling elements disposed between the inner and outer rings 102 and 101. The rolling elements 103 are arranged at predetermined intervals by a retainer 104. Reference numeral 105 denotes a housing made of a light alloy such as aluminum.
Are formed.

The housing 105 is provided with an elastic ring 10.
Outer peripheral surface 1011 of outer ring 101 fitted and held through
Has an eccentric circumferential groove 10 eccentric to the outer peripheral surface 1011.
As shown in FIGS. 1 and 2, the eccentric peripheral groove 1012 is formed to be smooth over the entire peripheral groove, and the minimum depth of the peripheral groove is smaller than the thickness of the elastic ring 106. .

As can be seen from FIGS. 1 and 2, the elastic ring 106 has an inner peripheral surface formed so as to be smooth over the entire area, has a thickness greater than the minimum depth of the peripheral groove 1012, and has a planar shape of: For example, as shown in FIG.
Arc portions 1061, ₁₀ with radius r ₁ centered at ₁
Has 62, further smaller diameter than the radius _{r 1} of the arcuate portion 1061 and 1062 is between the arc portion 1061 and 1062, the radius _{r 2} around the point _{P 2} is bulged portion 1063 at small circular arc It is formed.

The elastic ring 106 formed as described above
For example, as shown in FIG. 2, the eccentric peripheral groove 1012 is attached in a state of being elastically in contact with the eccentric peripheral groove 1012 of the outer ring 101 such that the bulging portion 1063 of the elastic ring 106 is located at the largest position of the eccentric peripheral groove 1012. Later, this is represented by 1052
When it is incorporated into the inner peripheral surface 1051 of the housing 105 in which is formed, the bulging portion 1063 of the elastic ring 106 is elastically compressed and deformed, and the central portion thereof is pressed against the roughness 1052 of the inner peripheral surface 1051 of the housing 105. And one or both edges 1064 of the wide elastic ring 106
Is combined with the depth of the groove of the eccentric circumferential groove 1012 to effectively prevent creeping into a small wedge.

Reference numeral 107 in the drawing denotes a seal plate, 10
Reference numeral 8 denotes a shaft. FIG. 3 is a sectional view showing another embodiment of the present invention. The difference from the above embodiment is that a metallic elastic ring 109 such as a wire is coated with a synthetic resin material, and an inner peripheral surface 1051 of a housing 105 is formed.
It is sufficient that only the portion where the roughness 1052 formed on the surface corresponds to the width of the elastic ring 109 is formed.

Therefore, the eccentric circumferential groove 1012 of the outer race 101
May be equivalent to the width of the elastic ring covered with the synthetic resin material, and the depth of the eccentric circumferential groove 1012, the bulging portion 1093, the end edge 1094, etc. are substantially the same as those in the above embodiment, and are the same parts. Are denoted by the same reference numerals, and the description of the operation is omitted.

[0015]

According to the present invention, the elastic ring is integrally molded with a material which elastically melts, or the wire is covered with a synthetic resin material, and the outer peripheral surface of the elastic ring and one or both edges are formed on the inner peripheral surface of the housing. By locking and contacting the roughness formed on the surface and wedge-like biting toward the minimum gap between the groove on the side of the eccentric peripheral groove of the outer ring with the smaller depth of the groove and the peripheral surface of the housing, The creep function between them works more effectively. Therefore, it is possible to prevent the fritting corrosion on the raceway surface of the rolling bearing, so that the effects unique to the present invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which an elastic ring is inserted between an eccentric circumferential groove of a rolling bearing and a housing.

FIG. 2 is a partially omitted AA sectional view showing a relationship between an elastic ring and an eccentric peripheral groove inserted in FIG. 1 and roughness formed on an inner peripheral surface of a housing.

FIG. 3 is a sectional view showing another embodiment of the present invention.

4 is a partially omitted AA cross-sectional view showing a relationship between an elastic ring and an eccentric peripheral groove inserted in FIG. 3 and roughness formed on an inner peripheral surface of a housing.

[Explanation of symbols]

 101: outer ring 102: inner ring 1012: eccentric peripheral groove 103: rolling element 104: retainer 105: housing 1051: inner peripheral surface 1052: roughness 106, 109: elastic ring

Claims (1)

(57) [Scope of request for utility model registration] An apparatus in which an elastic ring is inserted into an eccentric circumferential groove provided on an outer peripheral surface of an outer ring of a rolling bearing, and creep of the rolling bearing is prevented by frictional resistance between the outer peripheral surface of the elastic ring and an inner peripheral surface of a housing. In the above, the eccentric circumferential groove provided on the outer peripheral surface of the outer ring of the rolling bearing is formed smooth over the entire peripheral surface, and has a minimum depth formed shallower than the cross section of the elastic ring. A swelling portion having a smooth inner peripheral surface and projecting radially from a maximum depth portion of the eccentric peripheral groove is formed,
A creep preventing device for a rolling bearing, wherein a rough surface of an arbitrary shape is formed on an inner peripheral surface of a housing to increase frictional resistance with an outer peripheral surface of an elastic ring.