JPH0635661U - Rolling bearing sealing device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is intended to prevent water from entering the rolling bearing from the outside, such as when a vehicle enters a water pool. [Structure] A first cored bar having a flange is fixed to an inner diameter end of an outer ring, and a second cored bar having a flange facing the flange of the cored bar is fixed to an outer diameter end of an inner ring. Then, a seal lip is provided on one core bar to form a seal part between the core bar and the other core bar. A sealing device for a rolling bearing, characterized in that a water-absorbing polymer member is attached to one side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rolling bearing sealing device that prevents water from entering the rolling bearing from the outside.

[0002]

[Prior art]

 Conventionally, as a sealing device for a rolling bearing, as shown in FIG. 5, a seal member 12 is arranged between the inner diameter surface 10a end portion of the outer ring 10 and the outer diameter surface 11a end portion of the inner ring 11, or as shown in FIG. As shown in FIG. 3, a seal metal core 21 having a flange 21a is provided at the end of the inner ring surface 20a of the outer ring 20, and a core metal 23 having a flange 23a is provided at the end of the outer ring surface 22a of the inner ring 22. It is known that a seal lip 24 is attached to the lower end of the metal 21 and the lower surface thereof is pressed against the flange 23a of the cored bar 23.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned prior art, the seal part is designed to prevent oil and grease from leaking and to prevent foreign matter from entering from the outside. However, the footing of automobiles is harsh, and the above seal alone may not be enough to prevent water from entering, especially when immersed in a pool of water.

[0004]

[Means for Solving the Problems]

 The present invention is intended to solve the above-mentioned problems, and a first core metal having a flange is fixed to the end of the inner ring of the outer ring, and the end of the outer ring of the inner ring is opposed to the flange of the core. A second cored bar having a flange, and a seal lip is provided on one cored bar to form a seal part between the cored bar and the other cored bar. On the side, a water-absorbing polymer member is attached to one of the facing surfaces of the two cored bars.

[0005]

Embodiments will be described in detail based on the first embodiment of the present invention shown in FIGS. Reference numeral 1 is an outer ring. A first core metal 2 having a flange 2a at the end of the inner diameter surface 1a is fixed, and a second core having a flange 4a facing the flange 2a at the end of the outer diameter surface 3a of the inner ring 3. After fixing the gold 4 and attaching the seal lip 5 to one of the cored bar 2 and press-contacting it with the flange 4a of the cored bar 4 to form a seal part, it is located outside the bearing from the above-mentioned seal part. The water-absorbent polymer member 6 is fixed to one core metal 4 on one of the facing surfaces of the two core metals 2 and 4 with a predetermined gap 7 between the core metal 2 and the opposing core metal 2. The water-absorbent polymer member 6 is a heat-sensitive gel whose state changes at 20 ° C to 30 ° C, absorbs water and swells in a low temperature range, and releases and contracts water in a high temperature range.

Next, the operation will be described. When the automobile is immersed in the water pool, the water-absorbing polymer member 6 absorbs the water that has entered through the gap at the upper end of the core metal 4 in FIG. 1, and the water-absorbing polymer member 6 swells as shown in FIG. Seal with a seal to prevent water from entering the bearing. When the vehicle runs out of the water pool and runs and the temperature rises, the water-absorbing polymer member 6 contracts and releases water, becoming water vapor and flowing out. Then, the contraction causes a gap 7 as shown in FIG. 1 to reduce the rotational friction.

3 and 4 show a second embodiment of the present invention. The water-absorbent polymer member 6 is held in place by the flange 8a of the cored bar 8 and the flange 9a of the cored bar 9 fixed integrally with the cored bar 8 and is covered by the stretchable permeable membrane 6a. ing. The permeable membrane allows water but not gel. Other structural actions are similar to those of the first embodiment.

[0008]

[Effect of device]

 According to the present invention, since the water-absorbent polymer member is attached to one of the facing surfaces of the two cored bars on the outer side of the bearing of the seal portion, the water-absorbent polymer member absorbs water and swells, so that the automobile accumulates water. Even if it enters, it is possible to prevent water from entering the bearing, and normally the water-absorbing polymer member shrinks to form a gap with the core metal, thereby reducing the rotational friction.

[Brief description of drawings]

FIG. 1 is a front sectional view of a first embodiment of the present invention when not in operation.

2 is a front sectional view of FIG. 1 in operation.

FIG. 3 is a front sectional view of a second embodiment of the present invention when not in operation.

4 is a front cross-sectional view of FIG. 3 during operation.

FIG. 5 is a front sectional view of a conventional first comparative example.

FIG. 6 is a front cross-sectional view of a second conventional comparative example.

[Explanation of symbols]

 1 Outer ring 1a Outer ring inner diameter surface 2 Core metal 2a Flange 3 Inner ring 3a Inner ring outer diameter surface 4 Core metal 4a Flange 5 Seal lip 6 Water absorbing polymer member 6a Permeable film 7 Gap

Claims (1)

[Scope of utility model registration request] 1. A second cored bar having a first cored bar having a flange fixed to the inner diameter end of the outer ring, and a flange opposed to the flange of the cored bar at the outer diameterd end of the inner ring. Fixed,
A seal lip is provided on one core bar to form a seal part between the core bar and the other core bar. A rolling bearing sealing device comprising a water absorbent polymer member.