Force transducer, mounting arrangement for a force transducer, and weighing scale

Abstract

An exemplary mounting arrangement serves for the mounting of a force transducer that has a sensor-equipped core part connecting a support part to a force-application part. The support part can be bolted to a fastening part by mounting screws, and the force-application part can be bolted to a weighing pan carrier by means of mounting screws. The support part and the force-application part of the force transducer can each have a triplet of threaded holes serving to receive the mounting screws. Each triplet forms an isosceles triangle whose apex points towards the deformable body. The symmetry axes of the triangles lie in a plane that is parallel to the displacement travel of the force transducer. The mounting arrangement can be further configured to provide an effective overload protection in a low-profile design and to provide a thermally uncoupled fixation.

1 . A force transducer for a measuring device, comprising: 
 a force-application part;    a support part; and    a core part between the force-application part and the support part, decoupled by grooves from the force-application part and the support part, and equipped with at least one sensor, wherein at least the support part has three threaded holes running in a direction of a force application and serving to receive mounting screws, and wherein in a plane that intersects the holes orthogonally, centers of the threaded holes form an isosceles triangle whose apex points towards the core part.    
   
   
       2 . The force transducer of  claim 1 , wherein the support part and the force-application part each have three threaded holes running in the direction of the force application and serving to receive mounting screws, and wherein in a plane that intersects the holes orthogonally, centers of the threaded holes form isosceles triangles whose apices point towards the core part and whose symmetry axes are substantially parallel to each other and coplanar with the direction of the force application.  
   
   
       3 . The force transducer of  claim 1 , wherein distances between the three threaded holes are at least approximately equal.  
   
   
       4 . The force transducer of  claim 1 , wherein a distance between the centers of the threaded holes forming a baseline of the isosceles triangle is approximately twice as long as a distance of the centers of the threaded holes from a border of an attachment surface of the threaded holes.  
   
   
       5 . The force transducer of  claim 1 , wherein the core part comprises: 
 a deformable body configured as a parallelogram-shaped measuring element that guides the force-application part in a parallel translatory motion relative to the support part, wherein the at least one sensor is a strain gauge installed in a deformation zone of the deformable body.    
   
   
       6 . The force transducer of  claim 1 , comprising: 
 a circuit module mechanically and thermally coupled to the force transducer, wherein the circuit module includes a memory module as well as at least one converter circuit for conversion of analog signals produced by the sensor of the force transducer.    
   
   
       7 . The force transducer of  claim 1 , wherein the force application part is attached to a load receiving part configured as a weighing pan carrier, and the support part is attached with a fastening part used to fasten the force transducer to the weighing scale.  
   
   
       8 . The force transducer of  claim 2 , wherein distances between the three threaded holes are at least approximately equal.  
   
   
       9 . The force transducer of  claim 8 , wherein a distance between the centers of the threaded holes forming a baseline of the isosceles triangle is approximately twice as long as a distance of the centers of the threaded holes from a border of an attachment surface of the threaded holes.  
   
   
       10 . The force transducer of  claim 9 , wherein the core part comprises: 
 a deformable body configured as a parallelogram-shaped measuring element that guides the force-application part in a parallel translatory motion relative to the support part, wherein the at least one sensor is a strain gauge installed in a deformation zone of the deformable body.    
   
   
       11 . The force transducer of  claim 10 , comprising: 
 a circuit module mechanically and thermally coupled to the force transducer, wherein the circuit module includes a memory module as well as at least one converter circuit for conversion of analog signals produced by the sensor of the force transducer.    
   
   
       12 . A measuring device with a force transducer according to  claim 1.