Bearings – Rotary bearing – Antifriction bearing
Reexamination Certificate
1999-03-01
2001-01-30
Lorence, Richard M. (Department: 3682)
Bearings
Rotary bearing
Antifriction bearing
Reexamination Certificate
active
06179471
ABSTRACT:
DESCRIPTION
The present invention refers to a device for mounting a sensor to a railway axle bearing unit of the type equipped with an annular sealing insert fast with the stationary outer race of the bearing on the axially outer side thereof. The present invention also relates to a railway axle bearing unit equipped with such a sensor mounting device.
As is well known, railway bogies rest on the stationary outer races of axle bearings by means of saddle-shaped elements that leave uncovered the lower half of the axially outer face of the axle, where a sealing device is usually fitted to close from the outside the annular gap between the inner and outer races of the axle bearing.
It is an object of the present invention to provide a device enabling to easily fit in the upper parts of said bearing units a sensor for monitoring the operational conditions of the bearing, particularly but not exclusively a temperature sensor.
The above and further objects are accomplished, in accordance with one aspect of the invention, by the provision of a device for mounting at least one sensor to a railway axle bearing unit having an annular sealing insert fast with the stationary outer race of the bearing from the axially outer side, characterised by comprising a mounting means of substantially annular shape adapted for mounting to an axial cylindrical surface of said insert, said mounting means being adapted for supporting:
a sensor to be positioned at the upper half of the annular insert;
electrical connecting means to be located at the lower half of the annular insert and adapted for providing electrical connection of first conductor means connected to the sensor, to second conductor means connected to a further point remote from the bearing.
According to another aspect of the invention, there is provided a bearing unit for a railway axle of the type equipped with an annular sealing insert integral with the stationary outer race of the bearing at the axially outer side thereof, characterised by comprising a sensor mounting device as defined herein above.
REFERENCES:
patent: 3500091 (1970-03-01), Jones
patent: 5289120 (1994-02-01), Moretti et al.
patent: 5458420 (1995-10-01), Otto
patent: 5547290 (1996-08-01), Ouchi et al.
patent: 5594334 (1997-01-01), Sonnerat et al.
patent: 5622437 (1997-04-01), Alff
patent: 0 571 875 (1993-12-01), None
patent: 2 669 598 (1992-05-01), None
De Ponte Aniello
Genero Matteo
Moretti Roberto
Sozzi Fabrizio
Lorence Richard M.
Merchant & Gould P.C.
SKF Industrie S.P.A.
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