Measuring and testing – Dynamometers – Responsive to force
Patent
1996-03-14
1998-10-20
Dougherty, Elizabeth L.
Measuring and testing
Dynamometers
Responsive to force
73862625, 73862637, 73DIG4, G01L 104
Patent
active
058249176
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a force measuring device comprising a force sensor for measuring forces between mutually parallel machine parts, preferably in force bypass, in which the force measuring device has two parallel abutment faces having an adjustable distance between them.
DESCRIPTION OF THE PRIOR ART
Force measuring devices of the above type are used for the measurement of forces in machines, particularly machine tools, and preferably in force bypass. Measurement in force bypass is known from CH-PS 476 990 and DE 27 36 373 A1. If the measurement is performed in force bypass, the force sensor need measure only part of the generated forces so that the measurement range can be considerably widened.
Known from EP 0 433 535 A are force measuring devices which comprise at least one force sensor and, to perform measurement in force bypass, are clamped in pocket-sized recesses between two machine parts. For this purpose, it is known to provide the force measuring device with pairs of wedges which make it possible to install the force measuring device while providing with a bias. However, known measuring devices have such a constructional height that they cannot be mounted in partition plates having a thickness of 12 mm, since the pair of wedges together with the measuring element has a thickness of about 16 mm. On the other hand, the commonly used partition plates or respectively force measuring plates have a thickness of 12 mm. Such partition plates are installed, e.g., between the tool revolver and the tool carriage in turning machines so as to perform tool or process monitoring. To receive the force measuring device, the partition plates have corresponding recesses formed therein. Further, known force measuring devices disadvantageously consist of a plurality of constructional parts so that they are mounted with difficulties. Some of the known force measuring devices have to be fastened to the machine parts or be supported against them to allow the setting of the bias force. Also this is undesired with regard to a straightforward mounting process.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a force measuring device which has a reduced constructional height, can be mounted in an easier manner and is suited for a larger variety of uses.
The invention advantageously provides that the force sensor in a first measuring wedge is integrated in a recess in such a manner that the force sensor projects beyond the first measuring wedge, together with a first measuring surface forms a first abutment face, and with the second measuring surface, being parallel to the first measuring surface, is supported in the recess, that the first measuring wedge on the side opposite to the abutment face comprises a first force-transmitting inclined slide face, that a second flat measuring wedge comprises a second force-transmitting slide face being parallel to the first slide face and on the side opposite the second slide face comprises a second abutment face being parallel to the first abutment face, and that the measuring wedges are in parallel displaceable relative to each other on the abutment faces by use of an adjustment device and are connected to each other via said adjustment device.
Such a construction allows for a space-saving arrangement since the first measuring wedge need not be substantially higher than the force sensor, while the second measuring wedge can have a flat configuration. A further considerable advantage resides in that the force measuring device is arranged in one piece. Thereby, the mounting process can be performed in a very convenient manner and also can be easily performed subsequently. The inventive construction allows for a total height of the force measuring device which is not substantially larger than the minimum height determined by the force sensor. Thus, it is possible to produce force measuring devices having a constructional height of 12 mm, which can be used also in standardized partition plates to carry out force measurement between t
REFERENCES:
patent: 3410135 (1968-11-01), Reynaud
patent: 4744254 (1988-05-01), Barten
patent: 4770050 (1988-09-01), Hafner et al.
patent: 4827240 (1989-05-01), Hafner
patent: 5029483 (1991-07-01), Gautschi et al.
LandOfFree
Force measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Force measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Force measuring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-246371