Rail grinding machine displaceable manually on the rails of a track

Abstract

A rail grinding machine, which is displaceable manually on the rails of a track in a longitudinal direction with a machine frame supportable on a rail by way of guide rolls and a grinding apparatus mounted on the machine frame in such a way as to be pivotable about a pivoting axis running in the longitudinal direction has a grinding drive motor with a drive shaft for a grinding tool to be arranged below the drive motor, the grinding tool being drivable for rotation. A blower is arranged above the grinding tool which moves air downwardly past the drive motor and the grinding tool.

1 - 7 . (canceled) 
     
     
         8 . A rail grinding machine for grinding rails of a track, the grinding machine comprising:
 a machine frame with guide rolls for supporting said machine frame on a rail and for enabling the rail grinding machine to be manually displaced on the rail of a track in a longitudinal direction;   a grinding apparatus pivotally mounted on said machine frame about a pivoting axis running in the longitudinal direction;   said grinding apparatus having a grinding drive motor with a drive shaft for a grinding tool to be arranged below said drive motor, wherein said grinding tool is drivable for rotation; and   a blower arranged above the grinding tool and disposed to move air downwardly past said drive motor and said grinding tool.   
     
     
         9 . The grinding machine according to  claim 8 , further comprising a jacket disposed to surround said drive motor and said grinding tool at least partly, air ducts formed between said jacket and said drive motor on one hand and said grinding tool on the other hand, said air ducts communicating with said blower. 
     
     
         10 . The grinding machine according to  claim 9 , wherein:
 said blower is arranged between said drive motor and said grinding tool; and   said air duct between said drive motor and said jacket is an air intake duct and said duct between said grinding tool and said jacket is an exhaust air duct.   
     
     
         11 . The grinding machine according to  claim 9 , wherein said blower has an impeller, which is provided with a cover formed with a central intake opening, said impeller being coupled to said drive shaft for co-rotation therewith. 
     
     
         12 . The grinding machine according to  claim 11 , wherein said air intake duct is extended towards said intake opening radially in a direction of said drive shaft between said cover and said drive motor. 
     
     
         13 . The grinding machine according to  claim 12 , wherein said cover has a deflecting portion at an outer edge thereof, said deflecting portion leading to said exhaust air duct. 
     
     
         14 . The grinding machine according to  claim 9 , wherein:
 said grinding apparatus has a servo-motor arranged above said drive motor for an axial displacement of said drive shaft; and   said blower is fastened to said drive shaft so as not to be displaceable axially relative to said drive shaft.