A Measuring Device for Static Sliding Friction Coefficient of Seeds Based on Tangent Mechanism

Abstract

The invention discloses a device for measuring static sliding friction coefficients of seeds on the basis of a tangent mechanism. A collecting box is arranged on the outer wall of a shell body, a first sliding groove and a second sliding groove are formed parallelly in the shell body, a motor rack is installed on a cylindrical boss, and a motor is arranged on the motor rack; a slidable first sliding strip is arranged in the first sliding groove, a slidable second sliding strip is arranged in the second sliding groove, and the two ends of a panel contact shaft are fixedly connected to the topsof the first sliding strip and second sliding strip respectively; a horizontal bearing is arranged on the lateral surface of the motor rack. A gear set includes a large gear and a small gear, a sliding block capable of moving along a swing rod sleeves the swinging rod, and the panel shaft is in interference fit with an inner ring of a vertical bearing and can rotate around an outer ring of the vertical bearing; two slots are formed on the panel and internally provided with an experiment board, and two movable converging plates are arranged on the experiment board. The device for measuring thestatic sliding friction coefficients of the seeds on the basis of the tangent mechanism is easy to operate, convenient and easy to carry and stable in running, and the precision of an experiment result is high.

Description

technical field [0001] The invention relates to the technical field of a seed static friction coefficient measuring device, in particular to a seed static sliding friction coefficient measuring device based on a tangent mechanism. Background technique [0002] Seed static sliding friction coefficient is one of the important physical characteristics of seeds, which provides friction characteristic parameters for the design of mechanized sowing, harvesting and processing components. At present, there is no relatively perfect instrument for measuring the static sliding friction coefficient of seeds at home and abroad. Generally, the angle of the inclined plate is controlled by pulling the rope. There is a problem that the friction coefficient of the material cannot be accurately obtained due to large errors. In the above method, the movement of the panel is controlled manually, which is labor-intensive and time-consuming, and the rotation is not stable. The changing angular ve...

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Problems solved by technology

At present, there is no relatively perfect instrument for measuring the static sliding friction coefficient of seeds at home and abroad. Generally, the angle of the inclined plate is controlled by pulling the rope. There is a problem that the error is large and the friction coefficient of the material cannot be accurately obtained

In the above method, the movement of the panel is controlled manually, which is labor-intensive and time-consuming, and the rotation is not stable. The changing angular velocity makes the panel often have angular acceleration, which makes the experimental data have errors.

On the other hand, because the above method can only manually read the value on the protractor, the measurement of the angle is very rough. At the same time, the seeds do not have a complete converging device, which makes the experimental process very cumbersome and cannot meet the needs of agricultural machinery and equipment design.

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