Multifunctional four-bar mechanism demonstrator

Abstract

The invention discloses a multifunctional four-bar mechanism demonstrator, and relates to a teaching aid. The multifunctional four-bar mechanism demonstrator comprises a wooden box, a rack, a frame connecting rod, a telescopic connecting rod, a sliding block, a sliding block guide rail, a guide rail rotating bracket, a drawing board and a paintbrush, wherein the wooden box comprises a box body; the upper and lower halves of the box body are connected together through hinges; demonstration boards are arranged on the inner bottom surfaces of the upper and lower halves of the box body; magnetic strips for sucking the wooden box onto a blackboard are arranged on the demonstration boards; the rack is arranged on the demonstration boards, and is hinged to the telescopic connecting rod through the frame connecting rod; the sliding block is arranged on the telescopic connecting rod, and is matched with the sliding rod guide rail in a sliding manner; one end of the sliding block guide rail is a free end, and the other end of the sliding block guide rail is hinged to one end of the guide rail rotating bracket; the other end of the guide rail rotating bracket is hinged to the demonstration boards through dowels. The multifunctional four-bar mechanism demonstrator has the characteristics of convenience in carrying and operation, functional diversity, good demonstration effects and low cost, and is easy to popularize and use.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a multifunctional four-bar mechanism demonstrator. Background technique [0002] With the improvement of people's living standards, people pay more and more attention to the quality of life. Learning is no exception, pure theory teaching has become boring, teachers and students look forward to the combination of theory and practice. During the learning process, it can be found that students are not very easy to understand when learning the relevant knowledge of the hinged four-bar mechanism. Especially when it comes to "designing the four-bar mechanism according to the predetermined corresponding positions of the two connecting rods", they do not understand how the inversion method works. This requires the use of some auxiliary teaching aids that can be demonstrated directly in the classroom. However, the existing related teaching aids are inconvenient to carry, complicated to operate and si...

AI Technical Summary

Problems solved by technology

However, the existing relevant teaching aids are inconvenient to carry, complicated to operate and single in function.

For example, there is a teaching instrument with a hinged four-bar mechanism that is easy to carry (patent announcement number CN202075903U). When the bar is rotated, the teaching instrument needs to hold the frame by hand, and at the same time it is impossible to use a paintbrush to draw the movement track; in addition, there are some easy-to-operate The planar four-bar mechanism demonstrator (patent publication number CN102034388A), but this demonstrator has a mounting frame, occupies a large area, and is not easy to carry. Of course, it is impossible to use a paintbrush to draw the motion track

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