Patent ID: 9062753
Filing Date: 2015-06-23
Classification: F16D,F16H,Y10T

Abstract:
1. A connection structure comprising: a hollow output shaft of a speed reducer, which is provided with the hollow output shaft including a hollow portion, a driven shaft of a counterpart machine inserted into the hollow portion of the hollow output shaft, and a communication passage through which the hollow portion of the hollow output shaft communicates with an internal space of the speed reducer, wherein a space, which includes a clearance between the hollow output shaft and the driven shaft, is formed as a closed space, wherein the hollow output shaft and the driven shaft are connected to each other so that power is transmitted by a key fitted to a keyway formed on at least one shaft of the hollow output shaft and the driven shaft, wherein the communication passage is opened to the bottom of the keyway, so that the hollow portion communicates, through the communication passage, with the internal space of the speed reducer, wherein an axial end face of the hollow output shaft and a stepped portion of the driven shaft come into contact with each other, and wherein a seal member is disposed between the axial end face of the hollow output shaft and the stepped portion of the driven shaft.