JP2006038107A - Rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent abnormal noise from being transmitted by covering the outer ring of a bearing with a heat resisting elastic body to absorb chattering noise by the elastic body even if the chattering noise occurs on the bearing. <P>SOLUTION: The heat resisting elastic body 5 is fitted to the outer ring 4 of the rolling bearing 1. The heat resisting elastic body 5 is formed of a rubber or resin material, and either one of a silicon rubber and a fluoro rubber is selected as the rubber material. Thus, the chattering noise transmitted from rollers can be reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bearing used in a vehicle, in particular, a crankshaft bearing of an engine and a radial bearing of a transmission.

Conventionally, as a technique for preventing abnormal noise in a bearing, a bearing in which resin is provided at a contact portion between the race and the cage in order to prevent the occurrence of abnormal noise due to contact between the race and the cage (JP, A 2002-227851) and a bearing (Japanese Patent Laid-Open No. 2004-011657) that secures a sufficient film thickness of the lubricating oil by regulating the surface roughness of the cage.
JP 2002-227851 A JP 2004-011657 A

  However, in the conventional configuration, there has been no disclosure about the reduction of abnormal noise generated between the bearing supporting the bearing and the bearing. Also, when cylindrical roller bearings and needle bearings are used for engine crankshaft bearings, radial bearings for transmissions, etc., it was very difficult to smooth the surface of the shaft, so the surface shape of the shaft was somewhat distorted. If this is the case, it is difficult to take measures against a phenomenon that causes noise as an abnormal sound such as chatter noise due to vibration of the bearing.

  This invention provides the rolling bearing which solved the said subject.

  In order to solve the above problems, a rolling bearing according to the present invention includes an outer ring of a bearing supported by a support and a heat-resistant elastic body covering the outer periphery of the outer ring.

  As a result, even if chatter noise is generated in the bearing, it is possible to provide a vibration isolation effect.

  The heat resistant elastic body may be rubber or resin.

  In the rolling bearing according to the present invention, since the outer ring of the bearing is covered with a heat-resistant elastic body, even if chatter noise is generated in the bearing, it is absorbed by this elastic body, so that abnormal noise is hardly transmitted.

  Embodiments of the present invention will be described below with reference to FIGS.

  FIG. 1 is a sectional view of a bearing according to the present invention. FIG. 2 is an enlarged cross-sectional view of FIG.

  The rolling bearing 1 includes a cage 3 for holding the roller 2 on the circumference and an annular outer ring 4 that covers the roller 2 on the outer periphery thereof.

  The outer surface of the outer ring 4 is coated with a heat resistant elastic body 5 with a thickness of about 20 to 30 μm. The heat-resistant elastic body 5 is formed from a rubber-based or resin-based material, and when a rubber-based material is selected, it is selected from a silicon-based rubber and a fluorine-based rubber. In addition, when selecting a resin system, engineering plastic materials include polyamide resins, polyacetal resins, etc., and polymer composite resin materials mainly include polytetrafluoroethylene and polyetheretherketone thermoplastic resins, In order to improve mechanical strength, sliding characteristics, and wear resistance, glass fibers, graphite, molybdenum disulfide, and the like are added, and one of these may be selected and used.

  A crankshaft 6 is attached to the inner surface side of the rolling bearing 1 in contact with the roller 2. An outer ring 4 of the rolling bearing 1 is attached to a support body 7 formed on a cylinder block of the engine.

  As a result, the rolling bearing 1 is attached to the outer ring 4 and the support 7 with the heat-resistant elastic body 5 interposed therebetween, and chatter generated from the rollers 2 even if the surface of the crankshaft 6 is somewhat distorted. Sound is absorbed by the heat resistant elastic body 5, and abnormal sound and vibration can be blocked from the support body 7.

  As lubrication of the rolling bearing 1, engine hydraulic pressure is guided from the hydraulic hole 8 of the support 7 to the outer ring 4 of the rolling bearing 1, and is formed on the outer ring 4 on the circumference and penetrates to the roller 2 side at a plurality of locations. It is supplied through the oil hole 9.

In the above embodiment, the heat-resistant elastic body 5 is coated, but may be coated by press fitting.
Further, the heat-resistant elastic body 5 is not particularly limited to the specific material as in the embodiment as long as it is rubber-based or resin-based.

  Although the description has been given of the rolling bearing as a structure for supporting the crankshaft of the engine, the rolling bearing can be used as a support for the shaft of the transmission.

It is sectional drawing which shows embodiment of this invention. It is a principal part expanded sectional view of FIG.

Explanation of symbols

1 Rolling bearing 4 Outer ring 5 Heat-resistant elastic body 7 Support

Claims (6)

  A rolling bearing comprising an outer ring of a bearing supported by a support and a heat-resistant elastic body covering the outer periphery of the outer ring.   2. The rolling bearing according to claim 1, wherein the heat-resistant elastic body is formed of a rubber-based or resin-based material.   3. The rolling bearing support structure according to claim 2, wherein the rubber-based heat-resistant elastic body is selected from any one of silicon rubber and fluorine rubber.   The rolling bearing according to claim 2, wherein the resin-based heat-resistant elastic body is selected from any one of an engineering plastic material and a polymer composite resin material.   The rolling bearing according to claim 1, wherein the rolling bearing is used for supporting a crankshaft of an engine.   3. The rolling bearing according to claim 1, wherein the rolling bearing is used for supporting a shaft of a transmission.

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