Lubrication – Bearing packer
Patent
1998-07-31
2000-12-05
Bucci, David A.
Lubrication
Bearing packer
184 74, 1841052, 310 90, 384473, 222 58, 222 77, F16C 124
Patent
active
061553808
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a grease filling device for an electric motor which can fill a bearing of the electric motor with grease, particularly to a grease filling device for an electric motor suit able for filling a bearing with new grease after cleaning the bearing of a main motor for a railroad car whose bearing needs to be periodically cleaned and filled with grease.
BACKGROUND ART
The bearing of the main motor for the railroad car is heretofore cleaned periodically. In many cases, since the bearing of the main motor is in a position in which only by removing a cover outside the main motor, an outer end face of the bearing is exposed to the outside, the bearing can be cleaned by spraying cleaning liquid from an injection nozzle onto the bearing without removing the bearing from the main motor.
However, to fill the cleaned bearing with new grease, there has been no appropriate means for filling the bearing with a proper amount of grease while the bearing is not detached from the main motor. Therefore, the bearing was manually filled with grease, and the process from the cleaning to the filling of the bearing with grease could not be automated.
The present invention has been developed to solve the problem, and an object of the invention is to provide a grease filling device for an electric motor which can fill a bearing with a proper amount of grease without detaching the bearing from the electric motor.
DISCLOSURE OF THE INVENTION
A constitution of the invention will be described in detail.
The present invention provides a grease filling device for a bearing of an electric motor which can fill the bearing with grease without removing the bearing from said electric motor, the bearing having a structure constituted of an outer ring fixed on the electric motor, an inner ring disposed inside the outer ring and a rolling element interposed between said outer ring and the inner ring, being disposed in a position in which an outer end face can be exposed outside the electric motor and rotatably supporting a rotation shaft of said electric motor in the position, comprising: a nozzle being able to inject the grease supplied from a grease supply source via at least one injection hole in a tip-end face; a first packing projected from the tip-end face of the nozzle for adhering to the outer ring of said bearing when the tip-end face of the nozzle is pushed against the outer end face of said bearing; and a second packing projected from the tip-end face of said nozzle for adhering to the inner ring of said bearing when the tip-end face of the nozzle is pushed against the outer end face of said bearing, wherein said first packing, the second packing and the tip-end face of said nozzle form an annular groove and said injection hole is formed in the annular groove.
In the grease filling device having this constitution, when the tip-end face of the nozzle is pushed against the outer end face of the bearing, the first packing closely contacts to the outer ring of the bearing while the second packing closely contacts to the inner ring of the bearing. In the condition, the annular groove formed by the first packing, the second packing and the nozzle tip-end face is connected only to the operation space of the rolling element of the bearing. When the grease is supplied from the grease supply source, the grease injected from the injection hole is pushed into the operation space of the rolling element of the bearing or pushed out into the annular groove to flow into the operation space of the rolling element of the bearing and further into the grease pocket in the position adjacent to the inner end face of the bearing. In either case, the grease does not leak outside the bearing.
Therefore, when such grease filling device is used, the outer covering of the electric motor is not made dirty by the grease even if the filling operation is performed without removing the bearing from the electric motor. Also, when the supply of the grease to the nozzle is controlled by the control device, the grease fi
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Horie Koichi
Ichikawa Hachiro
Katagiri Masatoshi
Uchida Mitsunori
Yoshikawa Keizo
Bucci David A.
Central Japan Railway Company
Kim Chong H.
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