Parallel guide system for electronic balances

摘要

In a parallel guide system (1) for top-pan electronic precision balances made of a one-piece cast block with a system base (15, 18) which can be fixed to fixed points or forms fixed points, integrated parallel guide with upper and lower guides (4, 5) which have thin places (7) between their centre sections for a load pick-up (2) which can move vertically under load relative to the system base (15, 18), and a pick-up bearing for means (M/SP) for measurement conversion and/or load compensation which is arranged in the system base (15, 18), the system base (15, 18), the broad base, the load pick-up (2, 10), the small base and the upper and lower guides (4, 5) forming the sides of a symmetrical trapezium and the load pick-up (2) having pick-up bearings (11) for the load pan in side extensions (10), to increase the torsional stiffness and to improve the corner load behaviour, the system base (15, 18) and the load pick-up (2, 10) are formed as a box profile open at the side and the side extensions (10) of the load pick-up (2, 10) are extended somewhat into the side outline of the system base (15, 18) and fastening bearings (11) are arranged on their ends for a load pick-up frame (12, 28) enclosing the system base (15, 18) in a free-floating manner (Fig. 1). <IMAGE>