Weighing force transmission mechanism of hanging scale

Abstract

The invention relates to a weighing force transmission mechanism of a hanging scale, wherein a scale seat is of a box shape with an open front end face, in-flanges are arranged at the periphery of thefront end face of the scale seat, and the upper part and the lower part at the same side of the scale seat are provided with an upper bracket and a lower bracket which extend outwards; one side of aweighing sensor is arranged at the bottom of the scale seat by a fixing bracket, the other side of the weighing sensor is connected with a transfer rack, the lower part of the transfer rack is connected with a suspension shaft provided with a ball head at the bottom, a reverse ball hole joint at the top of a suspension arm is connected with the ball head of the suspension shaft, the suspension shaft and a hanger rod are arranged at the same side of the scale seat, a limit threaded rod passes through the transfer rack and the lower bracket and is rotatably connected with an upper stop nut and alower stop nut, the lower stop nut is arranged between the transfer rack and the lower bracket, the upper stop nut is arranged at the upper part of the lower bracket, an overload protection distanceAlpha exists between the upper stop nut and the upper end face of the lower bracket, and an underload protection distance Beta exists between the lower stop nut and the bottom surface of the lower bracket. The invention has compact structure and reasonable stress, and can fully protect the weighing sensor.

Description

technical field [0001] The invention relates to a weighing force transmission mechanism of a hanging scale, belonging to the technical field of electronic weighing. Background technique [0002] The hanging scale is mainly composed of a boom, a scale body, a suspension arm and connecting parts. The scale body is mainly composed of a scale base, a load cell, a display instrument, an operation panel, a printer, etc., and the suspension rod is fixed on the top of the scale base. The sensor is installed at the bottom of the inner side of the rectangular frame-shaped weighing base, and the connecting force transmission shaft on the load cell passes through the weighing base and is connected with the suspension arm. When weighing, when the object is placed on the suspension arm, the weight of the object deforms the load cell through the suspension arm, and the weight value is converted into a measurable analog signal through the change of the resistance of the Wheatstone bridge, a...

AI Technical Summary

Problems solved by technology

The scale seat of the hanging scale needs to be installed with a circuit printed board, and the force transmission shaft connected to the load cell must pass through the scale seat. Because the scale seat is not easy to seal, rain, dust, water vapor and harmful gases will affect the hanging scale. Weighing accuracy and working life

Furthermore, the scale base of the hanging scale is a rectangular frame structure, which is prone to parallelogram deformation under stress, and the mechanical strength of the scale base is not high, which affects the measurement accuracy of the hanging scale

Furthermore, although there is an overload protection distance between the load cell and the scale base, the load cell will not be damaged when the load exceeds the set weight requirement during weighing. This structure makes it difficult to control and adjust the protection distance during production, and During the handling, placement and use of the scale body, when the force transmission shaft is subjected to an upward force, similarly, the load cell will be damaged after being impacted

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