Patent ID: 9115519
Filing Date: 2015-08-25
Classification: A47K,E05D,E05F,E05Y,F16F,Y10T

Abstract:
1. A damping mechanism, pivotally connecting a pivotal element and a stationary element, comprising: a body connected to one of the pivotal element and the stationary element, the body defining a cavity having a central axis, the cavity comprising a threaded section disposed with female threads revolving about the central axis, and a smooth section; a rotating shaft, one end of the rotating shaft being inserted into the cavity, the other end of the rotating shaft being connected to the other one of the pivotal element and stationary element, the rotating shaft being provided with a radially outwardly-opening and axially-extending oiling slot, the depth and/or width of the oiling slot changing gradually; and piston having a threaded section disposed with male threads revolving about the central axis, and a piston head, the threaded section of the cavity and the threaded section of the piston constitute a screw-on fit relationship between the female and male threads, the piston being slidable on the rotating shaft along the central axis, the piston head being radially clearance-fitted or seal-fitted with the smooth section of the cavity, an axial hole section of the piston being clearance-fitted or seal-fitted with the rotating shaft, thereby dividing the cavity along a central axial direction into a first sub cavity containing the threaded section of the cavity and a second sub cavity axially opposite to the first sub cavity; wherein when the piston revolves along with the rotating shaft and shifts axially, the fluid filled in the first and second sub cavities is forced to flow from one sub cavity to another through the radial clearance between the axial hole section of the piston and the rotating shaft, and/or through the radial clearance between the piston head and the smooth section of the cavity, to provide a damping effect on the relative rotation between the rotating shaft and the body and wherein the radially outwardly-opening and axially-extending oiling slot is on the sliding path of the piston head.