Abstract:
This invention relates to a frictional vibration damper, especially used in washing machines with a spinning drum. The damper of the invention comprises two shette metals (9) bent and assembled together to form a piston rod (3), in order to facilitate the manufacture, and overcome the typical heat problem encountered by dampers.
Abstract:
A surface effect damper (10) comprising a housing (14) having a wall (20) that defines a chamber (22), the housing having a first end (16), a second end (18) and an axis; at least one contact element (42a,b,c) movable through the chamber between the housing ends in a first direction and in a second direction; and at least two damping elements (48a,b) substantially surrounding each contact element, each of the at least two damping elements being movable away from the axis and into frictional engagement with the wall as the at least one contact element is moved in a first direction and each of the at least two damping elements being movable toward the axis as the at least one contact element is moved in a second direction.
Abstract:
The invention relates to a method for making a friction damper (1) for linen washing machines, comprising a first molding step, in which a male element of the mold, by operating in an axial direction, provides a hole for housing therein the damper rod (4), the housing plane (88) of the friction element (3) and a plurality of recesses (7), upwardly open, and comprising a second operating step for making the restraining undercuts (6) for holding the friction element, said first and second steps being carried out either simultaneously or in succession. The present invention relates, moreover, to a friction damper for linen washing machines made by the inventive method.
Abstract:
In the damper of the invention, consisting of a tubular body (1) and a coaxial piston rod (13) slidably disposed inside the said body (1), a graduation (7) has been formed. In addition to this graduation (7) which causes an enlargement of the body diameter, a second graduation (17) is provided at the lower end of the pipe. Two friction elements (8, 32) are placed between these graduations (7, 17) with defined internals between them. Two oiling rings (segments) (9, 10), placed between the said friction elements (8, 32) provide the reduction of the friction heat generated during the operation of the damper. The generated heat, furthermore, is discharged through two rectangular ventilation openings (30, 31) opened on the tubular body, thus the cooling of the piston rod (13) is facilitated. The oiling rings (9, 10) serve as the oil reservoirs by forming the necessary oil reserve cell (11) between the upper (8) and lower friction elements (32) while at the same time they prevent the friction elements (8, 32) to move towards each other, thus keeping the distance between the said elements, unchanged.