Hand-operated cam mechanism characteristic-curve drawing instrument

Abstract

The invention relates to a cam in the machine manufacturing field and in particular relates to a hand-operated cam mechanism characteristic-curve drawing instrument. The hand-operated cam mechanism characteristic-curve drawing instrument is mainly composed of a positioning plate, an eccentric wheel, a positioning block, a ball slide bar, a preload device, a drawing board, a guide rail I, a guide rail II, a movable slider group, a base, a roller pin assembly and a synchronous transmission mechanism; the positioning plate is vertically connected with the base; the drawing board is connected with the guide rail II; the guide rail I is horizontally fixed in front of the positioning plate; a rack is connected with the guide rail II and engaged with a gear; the gear is coaxially connected with an upper synchronous pulley; a lower synchronous pulley is coaxially connected with the eccentric wheel; the upper synchronous pulley, the lower synchronous pulley and a synchronous belt are located behind the positioning plate; the positioning block is located under the guide rail I; the movable slider group is fixed in the positioning block and can be adjusted; the ball slide bar is located in the ball slider and capable of sliding up and down; the upper end of the ball slide bar is connected to the preload device, while the lower end of the ball slide bar is hinged to a pin; a rolling bearing is in rolling contact with the eccentric wheel.

Description

technical field [0001] The invention relates to a cam design and educational teaching tool in the field of mechanical manufacturing, especially a manual cam mechanism that can adapt to modern teaching requirements in the teaching process of mechanical course design and allow students to master the principle and design process of the cam mechanism in a short time Characteristic curve plotter. Background technique [0002] In the teaching of mechanical course design, if combined with the demonstration of teaching aids, the classroom effect can be improved. The cam mechanism is a simple and practical mechanical transmission device. The design of the cam mechanism generally uses the inversion method to trace a limited number of points, and finally completes it through curve fitting technology. Draw the S-φ displacement curve of the cam mechanism. The disadvantages of this method are that the work intensity is high, the efficiency is low, and the obtained data are discrete points...

AI Technical Summary

Problems solved by technology

[0002] In the teaching of mechanical course design, if combined with the demonstration of teaching aids, the classroom effect can be improved. The cam mechanism is a simple and practical mechanical transmission device. The design of the cam mechanism generally uses the inversion method to trace a limited number of points, and finally completes it through curve fitting technology. Draw the S-φ displacement curve of the cam mechanism. The disadvantages of this method are that the work intensity is high, the efficiency is low, and the obtained data are discrete points and the number of points is limited. The accuracy of the curve profile design depends on the number of points. In order to improve the accuracy, it is necessary to increase the number of plot points, and the described a kind of manual cam mechanism characteristic curve drawing instrument can easily solve this problem

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