Mechanical multiple torque damping device for a horizontal spindle

A mechanical multiple torque damping device connected with an end of a horizontal spindle, comprising:

• a support module including
• a mounting seat which has a base wall to permit an axis of the horizontal spindle to be normal to said base wall, said base wall having inner and outer wall surfaces opposite to each other,
• a tubular support axle which is securely connected with said base wall and extends from said inner wall surface to have a terminal end,
• an elastomer friction ring which is securely sleeved on said terminal end of said support axle, and
• a screw shaft which coaxially extends through said tubular support axle and which has a threaded portion that extends outwardly of said terminal end of said tubular support axle;
• a spindle coupling sleeve connectable and rotatable with the horizontal spindle, said spindle coupling sleeve being rotatably and coaxially sleeved on said tubular support axle and adjacent to said base wall;
• and
• a damping cylinder coaxial with said tubular support axle and said spindle coupling sleeve, and rotatable with the horizontal spindle, said damping cylinder having a cylinder body which extends axially to terminate at opened and closed end portions, said opened end portion being disposed proximate to said friction ring, said closed end portion having a screw hole which is threadedly engaged with said threaded portion of said screw shaft such that said damping cylinder is axially displaceable along said screw shaft relative to said friction ring during rotation with the horizontal spindle, said cylinder body having a plurality of inner frictional surface sections which are formed axially and which have different inner diameters such that said inner frictional surface sections are in frictional contact with said friction ring during axial displacement of said damping cylinder to generate multiple frictional torques.