Linkage mechanism experimental system

Abstract

The invention discloses a linkage mechanism experimental system which comprises a supporting platform, a crank support and a guide rail support, wherein cranks, connecting rods, slide blocks and slide block guide rails are sequentially arranged between the crank support and the guide rail support; a crankshaft is driven by a hand shank. Three cranks of different lengths, five connecting rods of different lengths and two slide block guide rails of different lengths are arranged in the system disclosed by the invention, and the slide block guide rails can be fixed in two positions of different heights by virtue of threaded holes of different heights in the guide rail support so as to be selected during assembling. The system disclosed by the invention is used for allowing students to select member sizes, assemble centered or biased crank slide bar (slide block) mechanisms, detect displacement errors and personally perceive mechanical properties of the mechanisms according to the specified slide bar (slide block) travel and other requirements. The experimental system disclosed by the invention contributes to allowing the students to cognize and understand the influences of kinematic pair structures and member sizes on mechanism motion output, the influences of kinematic accuracy and movement pair clearances on the mechanism motion accuracy, the influences of the member sizes on the mechanical properties of the mechanisms and the like.

Description

technical field [0001] When college students start to learn the courses of "mechanical principle" or "basic of mechanical design", they lack the necessary guiding experiments and have no perceptual understanding of the basic concepts of the course, which affects the learning effect. This lab system is intended for use as an introductory lab when starting a "Principles of Mechanics" course or similar. Background technique [0002] At present, the experimental device used in the teaching of the basic course "mechanical principle" or "mechanical design foundation" of science and engineering colleges and universities is like a " "Combined linkage mechanism experiment box", the structure of the disclosed technical solution is mainly: including the transmission part on the rear surface of the box body, the display part and the storage part on the front surface of the box body, the transmission part controls the movement of the display part through the control switch, the storage p...

AI Technical Summary

Problems solved by technology

[0003] None of the above-mentioned technical solutions can achieve the following functions: given the stroke of the slider (slider), the students can select the appropriate component length among the alternative components based on analysis, thinking, and trial assembly, and choose the centering or offset crank slider mechanism Assemble a crank-slider (slider) mechanism that moves according to a given stroke of the slider (slider); when selecting different pins, the hinge connection gap is different, and the movement accuracy of the mechanism is different (that is, the actual movement distance of the slider (slider) is different from the ideal The difference between the distances is different), and can be measured by general measuring tools; in the case of a given slider (slider) stroke, choose different lengths of connecting rods or guide rail lengths to assemble the crank slider (slider) mechanism, the experimenter Can personally experience the mechanical performance of the mechanism

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