Rolling bearing and sealing component for rolling bearing

Abstract

The invention provides a cheap bearing with excellent rustproof capability and excellent appearance, which is capable of being made compactly without damaging waterproof and dustproof function. The sealing component (7) comprises an approximately cylindric embedded part extending to external circumstance side of a perforated circular plate shaped base (71). An embedded part (73) is embedded into the external circumstance side of a grain wheel (3), for fixing the sealing component (7). A most easily rusty chamfered part (38) completely covers the grain wheel (3) of the rolling bearing (1) from the side face (31) to the external circumstance. As a result, excellent rust prevention effect can be achieved even if expensive stainless steel is not used. The embedded part (73) is not inserted into an annular space (4). Therefore, embedded depth of the embedded part (73) need not to be decreased and the width of the grain wheel (3) need not to be enlarged for avoiding interference between the steel balls in the annular space (4) and a retainer (6). The compact rolling bearing with the sealing component can be implemented without reducing waterproof and dustproof function.

Description

technical field [0001] The present invention relates to a rolling bearing and a sealing member for the rolling bearing. Background technique [0002] Among rolling bearings, rolling bearings with seals are used in order to seal grease inside or to prevent intrusion of water or dust from the outside. [0003] Figure 8 It is a sectional view showing an appropriate part of an example of a conventional sealed rolling bearing 901 . The rolling bearing 901 includes an inner ring 902, an outer ring 903, and a plurality of steel balls 905 arranged in an annular space 904 between the inner ring 902 and the outer ring 903. In order to maintain a constant distance between the steel balls 905 in the annular space 904, A cage 906 that rotatably supports steel balls 905, and a pair of seal members 907 that close the annular space 904 from both ends. [0004] The sealing member 907 includes a substantially disk-shaped base 971 with a hole in the center, an annular flange 972 extending t...

AI Technical Summary

Problems solved by technology

[0013] However, if the embedding depth of the embedding portion 973 is too shallow, the fixing force of the sealing member 907 on the outer ring 903 will be insufficient, and the waterproof function and dustproof function will also be reduced.

On the other hand, if the width of the outer wheel 903 is increased, although this problem can be solved, it cannot be used in products requiring compactness.

[0014] Third, in the conventional sealed rolling bearing 901, when viewed from the side, the side 921 of the inner ring 902, the side 974 of the seal member 907, and the side 931 of the outer ring 903 are arranged in concentric circles, but the seal member 907 The side surface 974 and the side surface 931 of the outer ring 903 may not be visible from the outside when the rolling bearing 901 is assembled in the product, which causes the appearance of the product to become complicated.

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