Patent ID: 8684643
Filing Date: 2014-04-01
Classification: B23Q,H02K,Y10T

Abstract:
1. Shaft cooling system for a tool motor spindle, the system comprising a rotating shaft configured to support a tool at a front end of the system, at least one cooling bore in the rotating shaft, a stationary lance, located at a rear end of the system, for supplying a cooling medium, and at least one cooling circuit having a cooling medium intake and a cooling medium outlet, and having a forward flow path through which the cooling medium flows in a direction from the rear of the system towards the front of the system, and also having a return flow path through which the cooling medium flows in a direction from the front of the system towards the rear of the system, wherein, in the at least one cooling circuit, the cooling medium is fed into the stationary lance and into the at least one cooling bore in the rotating shaft, and is fed from the at least one cooling bore in the rotating shaft back into the stationary lance, and wherein a plurality of lip-seals are arranged in a sealing manner on the stationary lance between the shaft and the lance, and the plurality of lip-seals delimit the forward and return flow ahs of the cooling medium from each other.