Rotational potentiometer having high lubrication performance

Abstract

The invention discloses a rotational potentiometer having high lubrication performance. The rotational potentiometer comprises a lower shell and an upper shell, wherein a cavity is formed between the lower shell and the upper shell, a rotary shaft, a conductive rotation sheet, a first fixed pin piece, a second fixed pin piece, a movable pin piece and a circular arc resistor body are arranged in the cavity, the first fixed pin piece and the second fixed pin piece are respectively connected at the two ends of the circular arc resistor body, a shaft sleeve is arranged on the upper shell, the rotary shaft is matched with the shaft sleeve, a first polytetrafluoroethylene coating layer is arranged on the inner surface of the shaft sleeve, a second polytetrafluoroethylene coating layer is arranged on the side surface of a circular groove, a third polytetrafluoroethylene coating layer is arranged on the bottom surface of the rotary shaft, an air inlet through hole is arranged in each of the upper shell and the lower shell, an air outlet through hole is arranged in each of the upper shell and the lower shell, and the air inlet through holes and the air outlet through holes both are threaded holes and are blocked and sealed through bolts. Through the above mode, the rotational potentiometer has high automatic lubrication performance, is flexible to rotate and has no frictional noise.

Description

technical field [0001] The invention relates to the technical field of potentiometers, in particular to a rotary potentiometer with good lubrication performance. Background technique [0002] The potentiometer is a resistive element with three terminals and the resistance value can be adjusted according to a certain change rule. A potentiometer usually consists of a resistor body and a movable brush. [0003] Potentiometers are installed on various devices for adjustment. The rotating shaft of the existing rotary potentiometer will encounter the situation of inflexible rotation, which will cause wear and tear, and is accompanied by friction noise. It needs to drop a small amount of gasoline from the rotating shaft for lubrication, which is troublesome. Contents of the invention [0004] The technical problem mainly solved by the present invention is to provide a rotary potentiometer with good lubricating performance, which has a simple and reasonable structure, good self...

AI Technical Summary

Problems solved by technology

The rotating shaft of the existing rotary potentiometer will encounter the situation of inflexible rotation, which will cause wear and tear, and accompanied by friction noise. It is necessary to drip a small amount of gasoline from the rotating shaft for lubrication, which is troublesome

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