Joints and connections – Having a joining piece extending through aligned openings in...
Patent
1999-01-11
2000-11-28
Browne, Lynne H.
Joints and connections
Having a joining piece extending through aligned openings in...
403334, 403329, E05F 1138
Patent
active
061526460
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for fastening a plastic housing of an adjuster device for motor vehicles on a supporting part of a vehicle body.
BACKGROUND OF THE INVENTION
The adjuster devices provided in a vehicle are as a rule fixed on supporting parts of the vehicle body. It is thereby often necessary to fix a plastic housing (e.g., a motor casing) on a structural part (e.g., a door inner panel) which consists of a more dimensionally stable material. These connections between the component parts are preferably formed as screw connections so that the components of the adjuster device can be removed from the supporting part of the vehicle body for the purposes of repair.
In the case of connections for component parts of this kind there is the problem that plastic shrinks through material ageing and deforms under the effects of temperature whereby the connection can become loose. Play then arises in the fixing of the corresponding structural assembly of the adjuster device. If this is for example the drive motor of a window lifter mounted in a plastic casing then the loosened fixing of the motor casing leads to premature wear and produces unacceptable knocking noises during operation.
In order to overcome this problem it is known from German Offenlegungsschrift DE 43 19 705 Al to press into the plastic structural element a press-in nut made of shape-stable material and to fix this on the vehicle body by means of screws and a distance member which likewise consists of a material of high shape stability and is supported on one side on the press-in nut and on the other side is supported on the supporting component part of the vehicle body.
This technical instruction does indeed allow a secure fastening of a structural element made of plastic on a supporting component part of the vehicle body but does however have the drawback that its manufacture is very expensive. More particularly it is necessary to use as fixing means in addition to the usual screws also additional spacers and press-in nuts which first have to be pressed into the plastic element.
SUMMARY OF THE INVENTION
The object of the invention is to provide a device for fixing a plastic housing of an adjuster device for motor vehicles on a supporting part of a vehicle body wherein the device is manufactured as simply and as cost-effectively as possible and with which at the same time a permanent long-lasting connection between the plastic housing and support part is obtained.
The invention is based on the surprising knowledge that a very durable connection can be produced between a plastic housing and a supporting part of a motor vehicle made of a more dimensionally stable material if the plastic housing and the supporting part are fixed against each other by using a second plastic housing. To this end it is proposed to mount the second plastic housing on the side of the supporting part of the vehicle body remote from the first plastic housing and to connect the two plastic housings together through a through hole in the supporting part by means of suitable connecting means so that the supporting part of the vehicle body is clamped between the two plastic housings. It is thereby additionally provided that one of the two plastic housings has a stud which engages through the through hole in the supporting part and is enclosed by a recess with which the other of the two plastic housings is provided.
By boxing the plastic housings inside each other (the stud of the one plastic housing is pushed into the recess of the other plastics housing) a very simple quick-fit closed connection is produced wherein the two plastic housings can be supported directly against one another axially and/or radially (dependent on the design of the stud, which is produced for example according to the stress on the connection between the two parts). The two plastic housings moreover react in the same way to the effects of temperature and ageing so that the connection remains permanently stable also for these reasons. Loosening of the connection t
REFERENCES:
patent: 4607456 (1986-08-01), Shiraishi et al.
patent: 5457384 (1995-10-01), Alfors
patent: 5502926 (1996-04-01), Grace et al.
patent: 5729930 (1998-03-01), Schust et al.
Buchta Christoph
Frobig Thomas
Hutter Ottmar
Langmann Erik
Muller-Blech Ralf
Brose Fahrzeugteile GmbH & Co. KG Coburg
Browne Lynne H.
Cottingham John R.
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