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Sealing device for rolling bearing

A technology for sealing devices and rolling bearings, which is applied to engine seals, ball bearings, bearing components, etc., can solve problems such as difficulty in suppressing water and dust, achieve the effect of suppressing width changes and increasing water resistance

Active Publication Date: 2013-11-20
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot be said that sufficient sealing properties against water and dust that try to intrude from the outside are obtained only by covering the space between the outer ring and the inner ring with a seal, and it is difficult to suppress water and dust from entering between the sealing lip and the inner ring. The space between enters the interior of the bearing

Method used

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  • Sealing device for rolling bearing
  • Sealing device for rolling bearing
  • Sealing device for rolling bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Hereinafter, the best mode for carrying out the present invention will be described according to the embodiments.

[0088] figure 1 A partial sectional view of an idler 50 used in the rolling bearing 10 including the rolling bearing sealing device according to Embodiment 1 of the present invention is shown. figure 2 show figure 1 An enlarged view of the seal part of the rolling bearing 10 shown.

[0089] as in figure 1 and 2 As shown in , the outer ring rotating type double row ball bearing for idler 50 includes: inner ring 12; outer ring 14; cage 18 for holding double row balls 16, 16; for covering inner ring 12 and a seal 20 in a space defined between the outer ring 14 ; and an oil slinger 40 provided on the side of the seal 20 facing the outer side of the bearing or on the axially outer side of the seal 20 . Among these constituent elements, the inner ring 12 , the outer ring 14 , the seal 20 and the flinger 40 constitute the sealing device of the rolling be...

Embodiment 2

[0104] The configuration of Embodiment 2 of the present invention will be described.

[0105] In the sealing device according to this embodiment, the same reference numerals will be given to the same constituent parts as those of Embodiment 1 already described above, and repeated identical descriptions will be omitted. image 3 A partial sectional view showing an idler 50 using a rolling bearing 10 including a rolling bearing sealing device according to Embodiment 2 of the present invention. Figure 4 shown in image 3 An enlarged view of part of the sealing arrangement in the shown rolling bearing 10 .

[0106] as in image 3 and 4 As shown in , the rolling bearing 10 is an outer ring rolling type single row ball bearing used in an idler 50 .

[0107] as in Figure 4 As shown in , a tapered side lip 30 that expands outwardly of the bearing when radially outwardly and tilts outwardly of the bearing is formed on the side surface 28 of the seal 20 that is further radially o...

Embodiment 3

[0122] Next, Embodiment 3 of the present invention will be described.

[0123] Figure 6 A partial sectional view showing an idler gear 50A using a rolling bearing 10A including a rolling bearing sealing device according to Embodiment 3 of the present invention. as in Figure 6 As shown in , the rolling bearing 10A is an outer ring rotating type double row ball bearing used in an idler 50A and includes: an inner ring 12; an outer ring 14; a cage 18 for holding the double row balls 16, 16; the seal 20 in the space between the inner ring 12 and the outer ring 14 ; and the flinger 40 provided on the side of the seal 20 facing the outer side of the bearing or on the axially outer side of the seal 20 .

[0124] Embodiment 3 is characterized in that the sealing performance of the rolling bearing 10A is increased by using a partial configuration of the idler 50A for incorporating the rolling bearing 10A therein. That is, as in Figure 6 As shown in , the ribs 52 of the idler 50A ...

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Abstract

An axial lip is formed on a side surface of a seal of a rolling bearing which faces a slinger so as to expand outwards of the bearing. A projecting portion is formed on a flat surface of the slinger which faces the seal by flexing the slinger in an axial direction so as to cause the slinger to project inwards of the bearing, and a distal end of the axial lip is brought into contact with the flat surface of the slinger in a position lying further radially outwards than the projecting portion on the slinger. A radially inward inner surface of the axial lip of the axial lip and a radially outer side sloping surface formed radially outwards of the projecting portion on the slinger form a labyrinth, and a portion of the side surface of the seal which lies further radially inwards than the position where the axial lip is formed and an apex portion of the projecting portion on the slinger form a labyrinth.

Description

technical field [0001] The invention relates to a rolling bearing sealing device. More specifically, the present invention relates to a rolling bearing sealing device in which a space between an inner ring and an outer ring is covered with a seal and a flinger is provided on an outer side of the seal. Background technique [0002] Bearings for use in idler bearings used in auxiliary peripherals of automobile engines such as idlers include, for example, sealing means that cover the space between an outer ring and an inner ring with an annular seal to suppress intrusion of foreign matter such as water and dust into the bearing internal. In addition, because this type of bearing needs to allow relative rotation between the inner and outer rings, the outer periphery of the seal is fixed to the outer ring, and a sealing lip is provided on the inner periphery of the seal so as to be in contact with the inner ring. form a sliding contact. [0003] Because idler bearings are used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/78F16C33/80
CPCF16J15/3264F16C33/7853F16C33/7859F16C2361/63F16C33/80F16C19/04
Inventor 山口晋弘沼田阳一伊藤育夫
Owner JTEKT CORP
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