sealing member

Abstract

To provide a seal member capable of suppressing the entry of foreign matters from the outside while suppressing the friction resistance with a rotary member.SOLUTION: A seal member 20 for suppressing the entry of foreign maters into a rolling bearing 10 which includes an outer ring 11 fixed to a housing 2, an inner ring 12 fixed to a rotary shaft 50 to be rotated relative to the housing 2, and a plurality of rolling elements 13 laid between the outer ring 11 and the inner ring 12, includes a toric base fabric 23 fixed to the housing 2, and a number of cut pile threads 28 which are woven in the base fabric 23 throughout its periphery and raised from the base fabric 23 to the rotary shaft 50 side and tips of which contact with an outer peripheral face 12b of the inner ring 12.SELECTED DRAWING: Figure 1

Claims

[Claim 1] A sealing member for preventing foreign matter from entering the interior of a rolling bearing having an outer ring fixed to a housing, an inner ring fixed to a rotating shaft that rotates relative to the housing, and a plurality of rolling elements interposed between the outer ring and the inner ring, An annular base fabric fixed to the housing or the outer ring, The system comprises numerous cut pile yarns woven around the entire circumference of the base fabric, which are raised from the base fabric toward the rotating shaft, with the tips of the piles in contact with the outer surface of the rotating shaft or the outer surface of the inner ring. The aforementioned cut pile yarn is coated with a lubricant to prevent liquid foreign matter from entering the inside of the rolling bearing, forming a sealing member. [Claim 2] The sealing member according to claim 1, wherein the napping direction of each of the cut pile yarns is inclined in the rotational direction of the rotation axis with respect to the radial direction of the rotation axis. [Claim 3] The sealing member according to claim 1, wherein the napping direction of each cut pile yarn is inclined in the axial direction of the rotating shaft so as to move away from the rolling bearing with respect to the radial direction of the rotating shaft. [Claim 4] The sealing member according to any one of claims 1 to 3, wherein the base fabric is a knitted or woven fabric. [Claim 5] The sealing member according to any one of claims 1 to 3, wherein the cut pile yarn includes at least one type of fiber from among polyester fiber, nylon fiber, fluorine-based fiber, acrylic fiber, cotton fiber, rayon fiber, and urethane fiber. [Claim 6] The cut pile yarn comprises a plurality of fibers, The fiber diameter of the aforementioned fiber is 7 μm or more and 60 μm or less. The fiber density of the cut pile yarn is 600 fibers / mm² or more and 2700 fibers / mm² or less. The sealing member according to any one of claims 1 to 3, wherein the amount of pressure applied to the cut pile yarn until the radial rebound load of the rotation axis in the cut pile yarn changes from 0 g / cm² to 100 g / cm² is 0.6 mm or more and 2.1 mm or less.

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