密封型転がり軸受

Sealed rolling bearing

Abstract

PROBLEM TO BE SOLVED: To provide a sealed rolling bearing capable of preventing the reverse rotation of a second lip in attaching a sealing plate and preventing interference between the second lip, and a rolling element and a cage without enlarging bearing width. SOLUTION: In this sealed rolling bearing, the sealing plate 35 mounted to the end part inner peripheral surface of an outer ring is provided with a first lip 36 extending radially inward so that the tip part 36a contacts, with an interference, a seal sliding surface 32a formed at the end part outer peripheral surface of an inner ring 32, and the second lip 37 extending axially inward so that the tip part 37a contacts, with an interference, a shoulder face 32b of the inner ring 32. The radial dimension a1 and axial dimension a2 of a chamfered part R at the end part of the shoulder surface 32b of the inner ring 32 are respectively set into a range of 0.2-0.5 mm, and the inner diameter dimension d1 before assembly of an arm part 37b of the second lip 37 is made larger than the outer diameter dimension D of the shoulder surface 32b of the inner ring 32. COPYRIGHT: (C)2004,JPO
【課題】密封板を組み付ける際の第2のリップの反転を防止すると共に、軸受幅を広げることなく該第2のリップと転動体及び保持器との干渉を防止することができる密封型転がり軸受を提供する。 【解決手段】密封型転がり軸受は、外輪の端部内周面に取り付けられた密封板35が、半径方向内方に延びてその先端部36aが内輪32の端部外周面に形成されたシール摺動面32aに締め代をもって接触する第1のリップ36と、軸方向内方に延びてその先端部37aが内輪32の肩面32bに締め代をもって接触する第2のリップ37とを備える。内輪32の肩面32bの端部における面取部Rの径方向寸法a1と軸方向寸法a2とをそれぞれ0 .2 〜0.5mmの範囲とし、且つ第2のリップ37の腕部37bの組立前の内径寸法d1を内輪32の肩面32bの外径寸法Dより大きくする。 【選択図】   図2

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