JP2006125500A - Bearing with resin pulley - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing with a resin pulley, whose creep is surely prevented by an inexpensive means. <P>SOLUTION: A hole 6 is provided in an outer diameter face 2a of an outer ring 2, in which a resin to be molded is filled. Thus, relative slippage between the outer ring 2 and the resin pulley 5 is prevented by the engagement of the hole 6 with the resin filled and solidified in the hole and the creep is surely prevented by the inexpensive means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bearing with a resin pulley in which a resin pulley is integrated with the bearing.

  Many bearings with a resin pulley in which a resin pulley is integrated with a bearing have a resin pulley integrated with the outer diameter surface of a metal bearing outer ring by molding. In such a bearing with a resin pulley, the coupling strength between the outer ring and the resin pulley decreases due to the difference in the coefficient of thermal expansion between the metal and the resin as the bearing temperature rises, and there is a relative slip called creep between them. May occur.

  Means for preventing such creep include means for forming two circumferential grooves extending in the circumferential direction on the outer diameter surface of the outer ring and inclined in opposite directions in the depth direction (see, for example, Patent Document 1), Means for forming a circumferential groove whose width and depth change in the circumferential direction (see, for example, Patent Document 2), and a circumferential groove provided on the outer diameter surface of the outer ring. Means for forming irregularities on the bottom surface by knurling or the like (see, for example, Patent Document 3), Means for forming spiral grooves and a plurality of circumferential grooves on the outer diameter surface of the outer ring (for example, see Patent Document 4) Etc. have been proposed.

  These creep prevention means are all designed to increase the bonding strength between the outer ring and the resin pulley by filling the circumferential groove with resin molded on the outer diameter surface of the outer ring. Creeping cannot be reliably prevented simply by forming a circumferential groove with a uniform cross section that extends straight in the circumferential direction. Therefore, the circumferential groove may have a deformed circumferential groove whose sectional shape in the extending direction or circumferential direction is changed, or the bottom surface of the circumferential groove. Concavities and convexities are formed on the surface.

JP 2002-372131 A JP 2003-65424 A Japanese Patent Laid-Open No. 11-148550 JP 2003-207032 A

  The above-described conventional creep prevention means has a deformed circumferential groove formed on the outer diameter surface of the outer ring or has irregularities formed on the bottom surface of the circumferential groove. There is a problem that costs increase.

  Therefore, an object of the present invention is to reliably prevent creep of a bearing with a resin pulley by an inexpensive means.

  In order to solve the above problems, the present invention provides a bearing with a resin pulley in which a resin pulley is integrated with an outer diameter surface of an outer ring of a bearing by molding, and the resin to be molded is formed on the outer diameter surface of the outer ring. A configuration with holes to be filled was adopted.

  That is, by providing a hole filled with the resin to be molded on the outer diameter surface of the outer ring, the relative slip between the outer ring and the resin pulley is caused by the engagement between the hole and the resin filled and solidified. In order to prevent creep, it was possible to reliably prevent creep by inexpensive means.

  Creeping can be more reliably prevented by providing the holes at a plurality of locations where the circumferential position and the axial position of the outer diameter surface of the outer ring are different.

  The bearing with a resin pulley according to the present invention has a hole filled with resin to be molded on the outer diameter surface of the outer ring, and the outer ring and the resin pulley are engaged with the hole and the resin to be filled and solidified. Since relative slip does not occur between the two, creep can be reliably prevented by inexpensive means.

  Creeping can be more reliably prevented by providing the holes at a plurality of locations where the circumferential position and the axial position of the outer diameter surface of the outer ring are different.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, this bearing with a resin pulley is obtained by integrating a resin pulley 5 with an outer diameter surface 2a of an outer ring 2 of a rolling bearing 1 by molding. Round holes 6 are provided at two locations whose circumferential positions are different by a phase of 180 ° and whose axial positions are different, and these holes 6 are filled with a molded resin and solidified.

  The rolling bearing 1 is a ball bearing in which balls 4 are arranged between an outer ring 2 and an inner ring 3, and the inner ring 3 is fitted on a fixed shaft (not shown). In addition, a flat belt (not shown) is wound around the outer diameter surface 5 a of the resin pulley 5, and a driving force is transmitted from the belt to rotate integrally with the outer ring 2.

  The resin pulley 5 tries to rotate before the outer ring 2 by the driving force transmitted from the belt, but the outer ring 2 and the resin pulley 5 are firmly formed by the hole 6 and the resin solidified in the hole 6. Since they are engaged, there is no relative slip between the two, and creep is reliably prevented. Further, it is possible to prevent the resin pulley 5 from being displaced in the axial direction with respect to the outer ring 2 due to a belt swing or the like.

  In the above-described embodiment, the bearing is a ball bearing and the resin pulley is for a flat belt, but the type of the bearing and the resin pulley is not limited to that of the embodiment, and any type is adopted. can do.

  Further, in the above-described embodiment, the holes filled with the molding resin are round, and these are provided in two places on the outer diameter surface of the outer ring. However, the shape of the holes can be arbitrarily selected, and the number of places to be provided May be one or three or more.

Front view showing an embodiment of a bearing with a resin pulley Sectional view along the line II-II in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling bearing 2 Outer ring 2a Outer surface 3 Inner ring 4 Ball 5 Resin pulley 5a Outer surface 6 Hole

Claims (2)

  In a bearing with a resin pulley in which a resin pulley is integrated on the outer diameter surface of the outer ring of the bearing by molding, the resin is characterized in that a hole filled with the resin to be molded is provided on the outer diameter surface of the outer ring. Bearing with pulley.   2. The bearing with a resin pulley according to claim 1, wherein the holes are provided at a plurality of locations where a circumferential position and an axial position of the outer diameter surface of the outer ring are different.

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