Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1990-07-30
1992-11-24
Rosenbaum, Mark
Metal working
Method of mechanical manufacture
Assembling or joining
29469, 295251, 1525031, 1525034, B23P 1100
Patent
active
051651599
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a process of assembling a wiper system as well as to a wiper system for motor vehicles.
BACKGROUND OF THE INVENTION
Normally a wiper system includes a support frame onto which an electric motor is fixed and which, furthermore, carries three bearing bushes for a wiper shaft, each bearing bush being driven by the motor via appropriate gearing elements, namely cranks and push rods. Usually these parts are pre-assembled as a unit by the manufacturer of the wiper system, and the unit is then delivered to the manufacturer of motor vehicles.
A wiper system also includes the wiper arm-and-blade assemblies which can be fastened to the wiper shafts. These wiper arm-and-blade assemblies have a wiper arm and a wiper blade mounted thereto. Each of these parts is also separately delivered to the manufacturer of motor vehicles by the manufacturer of wiper systems and, there, they are mounted onto the car body of the motor vehicle after the assembly of the support frame.
Such assembly of a wiper system to a motor vehicle is awkward. Moreover, there is a danger of assembling it wrongly, if one does not take care--by making increased logistic efforts--to put the parts, which belong together, but have been delivered separately, together again on the assembly line of the motor vehicle. Since in some motor vehicles the left wiper arm-and-blade assembly differs from the right one, for instance the wiper blade on the driver's side often has a spoiler for increasing the pressure, even when making increased logistic efforts mistakes regarding the assembly cannot totally be excluded.
SUMMARY OF THE INVENTION
Therefore the object of the present invention is to provide a process of assembling a wiper system in such a way that--by using easy means--a correct assignment of the separate parts is ensured. Thus a wrong assembly is avoided to a large extent so that operational reliability of the motor vehicle is improved. This object is achieved according to the invention by providing at least the wiper arms, and, if possible, the complete wiper arm-and-blade assemblies, fixed to a member of the wiper system in a transport position that can easily be released. Then the unit combined as such is to be transported to the motor vehicle, where the wiper arms are moved from their transport position into their operational position and are fixed onto the wiper shaft. Thus, in any case, it is ensured that the wiper arms or the wiper arm-and-blade assemblies are mounted onto the respective wiper shafts of the wiper systems.
One embodiment of the present invention provides that the wiper arms are locked within fastening pins which are attached to the support frame of a wiper system. Then the mechanical engineer can assemble the support frame to the car body at the motor vehicle manufacturer's location and can remove the wiper arms from these additional fastening pins and put them onto the wiper shafts. As to such an embodiment, additional, auxiliary elements just require for transport are thus necessary for fixing the wiper arms on the support frame or on another gearing member.
However, a far simpler and cheaper solution is provided by another advantageous embodiment of the invention the wiper arms are directly fixed onto the wiper shafts in a transport position that can easily be released. Thus the wiper arms are pushed, as usual, onto the conical and knurled section of the wiper shaft and the fastening nut, is slightly tightened. Then at the motor vehicle manufacturer's location the fastening nut is loosened to a certain extent so that the wiper arm can easily be moved into the operational position. Afterwards, the fastening nut is tightened again and thus the wiper arm is permanently fixed onto the wiper shaft in the operational position. Thus, without any doubt, the manufacturer of wiper systems can match the wiper arm or the wiper arm-and-blade assembly to the proper wiper shaft.
Since, according to the present invention, the wiper arms or the wiper arm-and-blade assemblies are transported
REFERENCES:
patent: 1839175 (1931-12-01), Hueber
patent: 3793671 (1974-02-01), Gebhard
patent: 3874249 (1975-04-01), Carpenter
patent: 4009502 (1977-03-01), Tamaki et al.
Egner-Walter Bruno
Prohaska Hans
Schmid Eckhardt
Bryant David P.
Lewis J. Gordon
Rosenbaum Mark
Seitter Robert P.
SWF Auto Electric GmbH
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