Spring devices – Resilient shock or vibration absorber
Patent
1991-02-26
1993-01-19
Oberleitner, Robert J.
Spring devices
Resilient shock or vibration absorber
188379, F16F 700
Patent
active
051801477
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a vibration damper for damping vibrations in a surface of an object, which damper comprises at least one oscillating body which is movably connected to said surface such that it is brought to oscillate so that the oscillating body transmits forces to the object which are principally oppositely directed to the forces which, through vibration, act on the object.
BACKGROUND
For damping vibration in a surface of an object, it has been previously known to employ a principle according to which a relatively heavy body is resiliently supported such that the body is brought to oscillate due to the object's vibrations, whereby the body and its support are so adapted in relation to the vibrations' parameters, that the body is brought to oscillate principally in opposition and thereby generates force components which are oppositely directed to the force components which produce the vibrations. Up until now, however, no satisfactory technical device has emerged which can be manufactured to achieve desired damping properties.
The object of the present invention is to provide a simple and effectively functioning device with easily adaptable damping properties and a long life span.
SOLUTION
Said object is achieved by means of a vibration damper which is characterized in that the vibration damper presents a locating part made from a shape-permanent material and intended to be fixedly attached to said surface of the object, that the locating part displays one or several inwardly facing vibration-transmitting support walls, that the oscillating body is supported at a distance from the support walls via damping elements of an elastic material, and that said damping elements are held in position in the locating part through cooperation with said inwardly facing wall or walls.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more closely described in the following with several embodiments and with reference to the attached drawings in which
FIG. 1 shows in a partly sectioned perspective view a part of the vibration damper according to the invention,
FIG. 2 shows a cross-section through a complete vibration damper according to the first embodiment shown in FIG. 1,
FIGS. 3 and 4 show the vibration damper in a second and a third embodiment.
FIGS. 5 and 6 show a fourth embodiment of the vibration damper in partly sectioned views.
PREFERRED EMBODIMENTS
As is evident from the embodiment according to FIGS. 1 and 2, the vibration damper is formed with an oscillating body 1 made from a material of high specific weight, such as steel, copper, tungsten or similar. In the shown example, the oscillating body 1 is formed as a parallelepiped, i.e. with six plane surfaces 2, 3, 4, at right angles to each other. The oscillating body is located in a cavity 5 adapted to the shape of the oscillating body, with a plurality of support surfaces 6, 7, 8, 9 inwardly directed towards the oscillating body 1. As illustrated in FIGS. 1 and 2, six support surfaces are included in this embodiment. The cavity is formed in a damping body 10 which is made from an elastic, suitably highly elastic material, for example rubber, such as natural rubber or synthetic rubber or silicon rubber. The damping body is formed as a housing for the oscillating body 1, in which the latter is suitably moulded. The damping body accordingly completely envelops the oscillating body 1 in the shown example, though in FIG. 1 this is partially sectioned in order to show the location of the oscillating body in the damping body. In the shown example this has enclosing wall parts 12, 13, 14, 15, 16, one wall part for each side surface 6, 7, 8, 9 of the oscillating body. Outwardly projecting spacing elements from the damping body's wall parts, which in the example shown in FIGS. 1 and 2 are made as circumferentially extending inclined flanges 17, 18, more accurately, an upper and a lower flange, which extend all the way around the damping body's two opposed wall parts 13, 15.
The vibration damper further comprises a locat
REFERENCES:
patent: 989958 (1911-04-01), Frahm
patent: 2797931 (1957-07-01), Hans
patent: 3432127 (1967-05-01), Philipp
patent: 3436042 (1969-04-01), Van Goubergen
patent: 3972119 (1976-08-01), Bailey
patent: 5024425 (1991-06-01), Schwerdt
Andersson Joachim
Gustafsson Bengt-Goran
Forsheda AB
Oberleitner Robert J.
Schwartz Chris
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