Comprehensive experimental device for linkage mechanism

Abstract

A linkage mechanism comprehensive experimental device includes a frame, a disc, two sliding blocks, three rod members, four hinge pins and a plurality of locking members, the three rod pieces are connected in series and hinged, outer ends of the two rods at the head and the tail are each hinged to one sliding block, and the two sliding blocks are respectively embedded in two chutes which are perpendicular to each other on the frame. The linkage mechanism comprehensive experimental device is characterized in that the four hinge pins are all convenient to assemble and disassemble, the center of the disc and the position of a point to which the distance from the center of the disc is equal to pitch of the two hinge pins on one rod member are respectively provided with one through hole or gap matched with the hinge pin, the disc can be hinged to one sliding block and another rod member after being overlapped with the rod member, the locking members are arranged on side surfaces of the chutes on the frame or the sliding blocks for locking or releasing the sliding blocks, thereby forbidding or allowing the sliding blocks to slide freely along the chutes, and therefore, the linkage mechanism comprehensive experimental device can realize various mechanism deformations, and can help students to understand the evolution of the mechanism, a technique of drawing an eccentric circle mechanism kinematic diagram, conditions for the mechanism to have determined motion, etc.

Description

technical field [0001] The invention relates to a teaching experiment tool, in particular to a comprehensive demonstration experiment device of a connecting rod mechanism, which can be transformed into a five-bar mechanism, a four-bar mechanism, an eccentric wheel mechanism, a crank slider mechanism or an elliptical mechanism and the like. Background technique [0002] The linkage mechanism is widely used, and it often appears in many industrial and agricultural machinery and construction machinery. Therefore, the linkage mechanism is one of the most important mechanisms to study in the principles of mechanics or the basics of mechanical design. The basic knowledge of planar linkages such as the conditions for the existence of cranks, the basic types of planar four-bar mechanisms and their evolution methods have become important and difficult points in teaching. [0003] For this reason, some people have developed some experimental devices to assist teaching and learning. ...

AI Technical Summary

Problems solved by technology

Such as ZL201220000685.6 and ZL201310501665.6, but the devices disclosed in these patents can either simply change the length of the rod to demonstrate the basic type of crank, or use complex methods and structures to directly overlap various evolution results, It is not very helpful for students to understand the process of evolution and draw a schematic diagram of the movement of the eccentric wheel mechanism

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