Magnetic four-bar mechanism tester
The technology of a four-bar mechanism and an experimental instrument, which is applied in the field of teaching experimental appliances, can solve the problems of inconvenient structure fixing and complex structure, and achieve the effects of simple structure, low cost and convenient disassembly.
Inactive Publication Date: 2020-02-04
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology
Such as ZL201220000685.6 and ZL201310501665.6, but the devices disclosed in these patents generally have disadvantages such as complex structure, fixed structure and inconvenient disassembly and storage.
Method used
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[0028] like figure 1 , 2 As shown in and 3, the center distance between the magnets at both ends of the rod 1 is 300mm, the length of the bar magnet 5 is 260, and it is in the middle of the magnets at both ends, and the center distance between the magnets at the two ends on the rod 2 is 120mm. The center distance between the two ends of the magnets on 3 is 350mm, the distance from the center of the third magnet to the centers of the two ends of the magnets is 280mm and 70mm respectively, the center distance between the two ends of the magnets on rod 4 is 160mm, and the four rods are Made of plastic or aluminum alloy or wood, the magnets are all embedded in the rod or pasted on the surface of the rod with glue.
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A magnetic four-bar mechanism experiment instrument comprises four bar pieces; a round magnet is fixed on the same head-tail surface of each bar piece; head and tail magnets of the four bar pieces are attracted to form a four-bar mechanism; the surface of the round magnet of one bar piece is also fixed with a strip-shaped magnet, and a round magnet is also fixed between two magnets on the surface of the round magnet of another bar piece. Thus, the four-bar mechanism experiment can be used for research discussion teaching in a condition of a turnover pair existing in the four-bar mechanism, can be used for demonstrating various basic four-bar mechanisms and also demonstrating a slider-crank mechanism; as the magnets are applied delicately, articulated motion in a condition of no mechanical hinge pin is realized, linear sliding motion is realized in a condition of no sliding block, the structure is simple, the operation is convenient, storage is facilitated, and after the magnetic four-bar mechanism experiment instrument is disassembled, the experiment instrument can still serve as a magnet for fixing an article on an iron surface.
Description
technical field [0001] The invention relates to a teaching experiment tool, in particular to a four-bar mechanism experimental device, which can be used to demonstrate the conditions for the existence of epicyclic pairs, crank-rocker mechanism, double crank mechanism, double rocker mechanism, crank-slider 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. Such as ZL2...
Claims
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IPC IPC(8): G09B25/02
Inventor 周永清
Owner NANJING AGRICULTURAL UNIVERSITY