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发表于 2011-1-10 17:28:15
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本帖最后由 glazheng 于 2011-1-10 17:33 编辑
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这是NSK的一项专利设计,国内好像人本也申请了。其实说穿了,也没啥;就是在有些应用中,以轴承腔是铝合金为例,钢和铝热膨胀率不同,发热后,为了防止外圈在轴承腔内爬动,所以有意的做个偏心槽。这样一来靠制动环的偏心量来和轴承腔摩擦阻止轴承外圈的爬动。(好人做的底,下面是从网上找的,贴过来)& C+ J4 t# c: V' f7 X6 h" s
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BACKGROUND OF THE INVENTION5 B6 [8 p& R' Z9 h. j% R" w
The present invention relates to a rolling bearing creep prevention device, and particularly to a rolling bearing creep prevention device which is used to prevent the outer ring
; I& ~: y% a0 v# B3 U) wof a rolling bearing built in a rotation support section of each auxiliary machine for an automobile, such as an alternator or car air-conditioner compressor, from rotating in a housing.
1 t% R9 I; N. ? ^Various auxiliary machines for an automobile often have a housing made of an aluminum alloy within which a rolling bearing for supporting a rotation shaft built. In the case where the rolling bearing is built in the inside of the housing, the outer ring forming a part of the rolling bearing is stationary fixed to the inside of the housing by a fittingly inserting manner. However, the aluminum alloy
1 q5 @7 I& j! {& n! R. Q) Uforming the housing has a thermal expansion coefficient larger than bearing steel forming the outer ring of the rolling bearing. Thus, if no countermeasures are taken, when temperature rises, the interference of the outer ring relative to the housing is lowered (or is lost), so that a so-called creep where the outer ring rotates in the housing is occurred and a rattle is simultaneously occurred in the rotation support section because of the rolling bearing. Moreover, the inner peripheral surface of the housing wears with rotation of the outer ring, thus the rattle grows gradually......
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前言:本实用新型涉及一种含有偏心止动环的滚动轴承,包括:本体(1);在本体(1)的外径上车加工一个与轴承外径不同心的偏心槽(12);所述偏心槽(12)的圆心与轴承的圆心有个偏心量e;还包括一个止动环(11);所述止动环(11)安置在偏心槽(12)内;本实用新型的有益效果是:当轴承安装在轴承室内时由于有偏心量的存在,当轴承有旋转的趋势时,止动环卡紧量会随着增加阻止轴承外径跟随转动,防止了打滑转动的现象。
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