Balance Load Change Device with Height-Adjustable Scales
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Solution Overview
Problem
Existing scale devices with load changing mechanisms face high costs and complexity due to demands for minimal play and low-friction movability in both rotational and linear movements, which are necessary for precise test weight positioning but are difficult to achieve with current bearing technologies.
Innovation Solution
The scale device is designed with a magazine table fixed at a height relative to the base, and the scales are height-adjustable, allowing only simple bearings for movement, with the scales being raised towards the turntable instead of the turntable being lowered, and incorporating a three-point stop system for precise height adjustment and reduced play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the turntable is made height-adjustable with minimal play and low-friction movability in both rotational and linear directions, then precise test weight positioning is achieved, but device complexity and cost increase due to extremely high demands on bearing technology
Solution Approach 1:
The patent inverts the traditional approach by making the scales height-adjustable relative to the fixed magazine table, rather than making the magazine table height-adjustable. This inversion transfers the movement requirements from the magazine table to the scales, allowing the use of simple, cost-effective bearing technology while maintaining precise positioning capability.
2Measurement precision
If the turntable is made height-adjustable with minimal play, then precise test weight positioning is achieved, but costs increase due to extremely high demands on bearing technology
Solution Approach 1:
The patent inverts the traditional approach by making the scales height-adjustable relative to the fixed magazine table, rather than making the magazine table height-adjustable. This inversion transfers the movement requirements from the magazine table to the scales, allowing the use of simple, cost-effective bearing technology while maintaining precise positioning capability.
Data Source
Figure 1~3
AI summary
The invention relates to a balance having a load change device, wherein the load change device (14) has a magazine table which is mounted so as to be horizontally movable and has a plurality of vertical openings (26) arranged in groups, and the balance (12) has a weighing cell (34) and a load receptacle (42) having a carrier arrangement (44) corresponding to each group of openings in the magazine table, and wherein the magazine table and the balance (12) are height-adjustable relative to one another, with the result that a group of openings in the magazine table positioned above the load receptacle (42) in a weighing position is penetrated by the carrier arrangement (44) of the load receptacle (42), and the carrier arrangement (44) of the load receptacle (42) is positioned lower than the vertical openings (26) in the magazine table in a changing position. The invention is distinguished by the fact that the magazine table is mounted at a fixed height relative to a base (16), and the balance (12) is height-adjustable relative to the base (16), wherein the travel of the balance (12) is upwardly limited by a stop (32) which is at a fixed height relative to the base (16).