Weights of standard machine loading device

Abstract

The present invention discloses a weight of standard machine loading device which comprises weight groups comprising a plurality of weights; each weight is step cylinder with circle center via; bottom circumference of small diameter section of each weight is evenly distributed with several lower spigots extending outwardly; the upper port of the first weight is evenly distributed with several upper spigots extending to the circle center; the circle center via of each weight from the second weight is step hole; the upper port at the big diameter end of the step hole is evenly distributed with several upper spigots extending to the circle center; the upper end face at the big diameter section of each weight from the second weight is evenly equipped with locating pins; the big diameter section of each weight from the first weight is further equipped with locating hole; the locating pins and locating holes of the adjacent weights are corresponding; the big diameter section of the lower weight is sleeved with the small diameter section of the upper weight in turn through the spigot. The weight is able to avoid the mutual dislocation of the upper and lower weights in the loading or unloading process, prevent the weight from swinging after loading and affect the indicating value of torque or force so as to improve the repeatability of the indicating valve.

Description

technical field [0001] The invention relates to a weight, in particular to a weight of a standard machine loading device. Background technique [0002] In industrial production, it is often necessary to use torque measuring instruments and dynamometers to measure the torque, force and other indicators of manufactured products, while torque measuring instruments and dynamometers need to be calibrated with standard force weights on the standard machine to ensure their The value is accurate and reliable. see Figure 9 , the standard force value weight of the loading device of the existing standard machine is composed of a plurality of weights, each weight is a cylindrical structure with a central through hole, and each weight is evenly distributed with four axial Pin holes 12, the adjacent upper and lower weights are respectively inserted into the pin holes by four live pins 11 and connected in series to form a weight group, the weight group is held by the tray 9 of the loadin...

AI Technical Summary

Problems solved by technology

However, since this kind of weight is connected by a live pin, there is a large gap between the live pin and the small hole of the weight. When unloading, the live pin cannot make the serially connected weights stably fixed, resulting in the weight not being reset accurately. Offset is prone to occur, that is, there is a misalignment between the upper weight and the lower weight. When the weight is loaded again for verification, the suspended weight will swing, causing the torque indication value to be unable to stabilize in a short time, and the indication value is accurate. In this way, the torque value of the standard machine, especially the repeatability of the small torque value, is greatly affected. Therefore, it is necessary to wait for the weight to stop swinging when using it, which seriously affects the detection efficiency and is extremely inconvenient to use.

Since the repeatability index of the indication value in the verification regulations of the national torque standard machine is less than a few ten-thousandths, the weight of the above-mentioned existing structure is used as the force loading device on the 1000N.m torque standard machine, and its actual repeatability index is 3×10 -4 ~7×10 -4 range, the repeatability index of the indication value is only ten thousand, and it is not convenient to use

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