Rotational movement damper

摘要

The invention relates to a rotational movement damper (1) comprising an outer sleeve (2) and an axle which fits in the outer sleeve (2) and mounted to rotate in the outer sleeve. The axle comprises at least two discoidal flanges (7, 8, 17, 18) with flat flange surfaces (9, 10) and the same diameter, fitting in annular channels (12, 13, 14, 15) in the outer sleeve (2) such that the flanges contact with the planar flange surfaces (9, 10) thereof against the equally planar area on the counter surfaces of the annular channels (12, 13, 14, 15) unaffected by temperature variations and, on counter-rotation of the outer sleeve (2) and axle (3) act as a slipper clutch.

主权项

1. A rotational movement damper comprising:
an outer sleeve having an axial hole and at least two identical annular channels extending radially outward from the axial hole, each of the identical annular channels having flat upper and lower counter surfaces; and an axle having at least two identical discoidal flanges with flat upper and lower flange surfaces which fit into the outer sleeve and is mounted to rotate in the outer sleeve, wherein the identical discoidal flanges of the axle and the identical annular channels have outer diameters that are equal, and the flat upper and lower flange surfaces of the identical discoidal flanges and the flat upper and lower counter surfaces of the identical annular channels have planar areas that are equal, so that when the axle and the outer sleeve are mounted together, the axle is firmly engaged by the outer sleeve, in a way that the flat upper and lower flange surfaces of each of the identical discoidal flanges face against a corresponding one of the flat upper and lower counter surfaces of the corresponding identical annular channels, and on counter-rotation of the outer sleeve and the axle, the rotational movement damper acts as a slipper clutch, in which friction between the outer sleeve and the axle during mutual rotation is overcome when a torque on the rotational movement damper exceeds a predetermined amount, and wherein at least one of the outer sleeve and the axle of the rotational movement damper is formed of plastic and the outer sleeve comprises a plurality of teeth evenly spaced on an outer circumference of the outer sleeve.