Expansible chamber devices – Abutment connection between working member and power...
Patent
1994-11-14
1996-06-04
Ryznic, John E.
Expansible chamber devices
Abutment connection between working member and power...
74105, 417360, 403375, F16J 110, F04B 1700
Patent
active
055223044
DESCRIPTION:
BRIEF SUMMARY
This application is a Rule 371 of PCT/EP94/00508 filed on Feb. 23, 1994.
BACKGROUND OF THE INVENTION
The invention relates to a driver as a connection between the piston of an injection pump and a driving element moved loosely against the end of the piston nearest the drive in accordance with the lift of the piston, the piston end being formed by a widened base plate and the driver being pivotably fastened to the driving element.
Such a driver is disclosed in the DE-C-2723969. It has a sliding groove, into which the prepared base plate of the piston of the injection pump is introduced without clearance. The driver comprises a push rod, which runs in a longitudinal guide and is connected over a connecting rod in a hinged fashion with a rocking lever. The cost of manufacturing of a driver, so guided, is appreciable.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a special driver, with which a direct connection can be produced in a simple manner between the piston end and a driving element, which is provided on the engine side. The driver is to consist of a component, which can easily be produced and installed and ensures reliable functioning even when the plunger return spring of the injection pump is replaced by an appropriately elastic driving element pressing against the driver.
According to the invention, the above object is accomplished by that, for establishing the connection, the driver, fastened to the driving element, can be swiveled over the rear of the base plate until it reaches an end position, in which it is secured by embracing the piston. In its end position, the driver sees to it that the connection between the piston and the driving element, which acts directly on the piston, which in turn is guided in the pump cylinder, is almost free of play.
Because the driver is fastened to the driving element and as a result of the possibility of establishing its connection with the piston end by a simple swiveling of the driver, the installation of the injection pump at the engine is particularly simple. After the widened base plate of the piston is brought into a position in which it is in contact with the driving element, the driver, pivotably fastened to the driving element, is simply swiveled over the base plate, so that it grips over the rear of the base plate and prevents the latter from being lifted from the driving element when the engine is operating.
The invention is suitable particularly for small diesel engines, for which great importance is attached to being able to use injection pumps of particularly simple construction, for example, those which make do without the usual driving push rod with spring-loaded linear guidance.
In a further development of the invention, the driver has a transverse part, which grips behind the base plate of the piston and is provided with slots or openings for the entry of the piston end between the transverse part and the driving element. Such a transverse part enables the piston end, which is constructed with the widened base plate, and the driving element to be assembled in a simple manner in that the piston end passes through the slots or openings in the transverse part of the driver, before the driver is swiveled into the end position.
To secure the connection, spring-mounted projections are provided on the transverse part and, in the end position of the swiveling motion, laterally grip behind the piston and hold it in position by the spring-mounted projections. These projections thus are deformed during the swiveling motion, in that they are expanded appropriately by the piston in order then to grip the piston once again by the spring action, so that the driver is fixed in the final swiveling position corresponding to its working position.
A driver of particularly simple construction, at least, as far as the transverse part is concerned, is constructed as a sheet metal stamping. The transverse part advantageously consists of two sheet metal brackets, which are bent into a parallel position with little distance between
REFERENCES:
patent: 1957669 (1934-05-01), Rockwell
patent: 1957753 (1934-05-01), Babitch
patent: 1995507 (1935-03-01), Harry et al.
patent: 3186350 (1965-06-01), Fitzgerald
patent: 3741022 (1973-05-01), Olson et al.
patent: 4234292 (1980-11-01), Berg
patent: 4352586 (1982-10-01), Hayden
patent: 4535641 (1985-08-01), Kriz et al.
patent: 5174734 (1992-12-01), Thomas et al.
Geier Herbert
Kampichler Gunter
Motorenfabrik Hatz GmbH & Co. KG
Ryznic John E.
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