Ring-shaped limiting device of weighing instrument

Abstract

The invention relates to a ring-shaped limiting device of a weighing instrument, comprising an upper connecting plate, a lower connecting plate and a weighing sensor, wherein the upper end and the lower end of the weighing sensor are respectively connected with the upper connecting plate and the lower connecting plate; the lower connecting plate is provided with a limiting piece; the upper connecting plate is provided with a limiting ring which is provided with a limiting groove; the limiting groove of the limiting ring is arranged at the periphery of the limiting piece; a limiting interval is arranged between the inner wall of the limiting groove and the periphery of the limiting piece; in carrying or / and installation, a connecting rod is arranged on the upper connecting plate and the lower connecting plate; and a locking rod penetrates through an outer radial pin hole of the limiting ring and an inner radial pin hole of the limiting piece and is fixed by a nut. The ring-shaped limiting device has the advantages that the structure is reasonable, and the limiting interval does not need to be adjusted in use, so that the maintenance cost can be reduced.

Description

technical field [0001] The invention relates to a ring-shaped limiting device for a weighing apparatus, which belongs to the field of electronic weighing. Background technique [0002] Electronic weighing instruments are composed of a scale body, a load cell and a weighing instrument. Usually, the load cell is installed on the foundation, and the weighing platform is set on the upper part of the load cell. The output signal of the load cell is wired or wireless to the weighing instrument. , when the load enters the scale body, under the action of the gravity of the object, the elastic body on the load cell will be deformed, so that the bridge impedance of the strain gauge pasted on the elastic body will be out of balance, and the output will be proportional to the weight value. The signal is processed by the weighing instrument to display the weight and other data. [0003] In order to limit the shaking range of the scale platform of the weighing instrument, a limit piece f...

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Problems solved by technology

[0004] At present, a limit mechanism on the weighing platform only limits the degree of freedom in one direction, that is, limits the movement range of the weighing platform in one direction, but the weighing platform needs to be restricted in the longitudinal, horizontal and even height directions to ensure the safety of the weighing instrument. Therefore, there are longitudinal limiters, transverse limiters and height limiters installed on the weighing platform. In particular, the installation position of the limiter is basically set on the weighing platform in the foundation pit, which is limited by the installation space. , there are problems of inconvenient operation such as installation and debugging

At the same time, due to the influence of external temperature changes and usage conditions, the limit distance between the weighing platform and the foundation is changing all the time, so it is necessary to adjust the limit distance frequently, which causes inconvenience to installation and debugging. In particular, it is necessary to adjust the limit mechanisms in all directions in time. require high maintenance costs

And it is often necessary to adjust the limit distance, which will also affect the reliability of the limit work of the load cell, causing the adjustment mechanism to be easily damaged

At the same time, because the limit mechanism needs to be adjusted, the requirements for the adjustment space are relatively high, which increases the complexity of product design

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