Pipe joints or couplings – Swivel – Transverse cylinder in socket
Patent
1990-11-16
1992-07-14
Nicholson, Eric K.
Pipe joints or couplings
Swivel
Transverse cylinder in socket
384296, 384215, F16K 4100, F16C 2700
Patent
active
051296870
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a swivelable conduit particularly for an air-conditioning system of passenger space of motor vehicles. A conduit of this type is already known, in which axial play is accepted as unavoidable and in which a felt ring is arranged in order to eliminate the radial play of the pivot mounting, which felt ring is supposed to compensate for this play. In addition to the costs incurred because of the mounting of the felt ring, the wall must comprise an opening, since the felt ring can only be mounted from the outside. However, such an opening can then no longer be sealed at a reasonable cost. In many cases, the axial play which cannot be eliminated also leads to rattling noises which should be prevented.
SUMMARY OF THE INVENTION
In accordance with the invention, a swivelable conduit is provided which is guided at a stationary structural element via two pivot mountings which are flush with one another and arranged at a distance from one another, wherein the pivot mountings comprise a bearing bush connected with one of the two elements in a bearing pin connected with the other element and in which the two bearing elements are provided with should surfaces and counter-shoulder surfaces facing one another and defining a relative movement of the two bearing elements which is directed in the direction of the swivel axis, wherein in accordance with the present invention at least one of the surfaces of the bearing elements, which surfaces cooperate with one another has at least one elastically deformable portion which in a relaxed state projects over the contour which is occupied in an installed state and accordingly in a tensioned state.
The swivelable conduit according to the invention has the advantage that the elastically deformable portions, when pretensioned in the assembled state of the pivot mounting and supported at the other bearing surface, eliminate all unwanted bearing play, so that the mounting e.g. of a felt ring can be dispensed with.
Therefore, the mounting opening can also be dispensed with, so that the air duct in the area of the pivot mounting for the swiveling element can be constructed so as to be absolutely tight.
In accordance with another feature of the present invention, the elastically deformable portion of one surface is opposed by a relatively inelastic portion of the area of the other surface cooperating with this surface.
The bearing pin can be constructed as a separate structural component part which is connectable with the elements, and can be rotatably supported in a bearing bush of the stationary structural element.
On the other hand, the bearing pin can be provided with an annular collar which comprises at least one portion which can deflect elastically in the direction of the rotating axis of the pin. This portion of the annular collar can be constructed as an arm extending along a predetermined angle around the rotating axis of the pin, securely connected at one end with the annular collar, and cooperating with an annular surface of the bearing bush acting as a counter shoulder.
The arm can be provided at its free end with a cam which projects over the annular end face forming a shoulder surface and facing in the direction of the rotating axis of the pin. The arm, with its surface located opposite the cam, can jump back relative to a plane which is formed by the end face of the annular collar remote of the outer surface area of the bearing pin.
The bearing pin can have a projection at the end face of the annular collar remote of the outer surface area of the bearing pin.
The bearing pin can have a projection at the end of the annular collar remote of its outer surface area, which projecting is provided with a rotating drive for the conduit. The bearing pin can also have at its annular collar two diametrically opposite elastically deformable portions. Finally, the bearing pin can have at its outer surface area at least one portion which can deflect elastically radially relative to the rotating axis of the pin.
The above me
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patent: 4887331 (1989-12-01), Thomas
Scheidel Wolfgang
Stenger Jurgen
Van Wijhe Albert
Nicholson Eric K.
Robert & Bosch GmbH
Striker Michael J.
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