Teaching demonstration model for physical experiment
A technology of physical experiments and models, applied in the field of teaching demonstration models of physical experiments, can solve the problem of not having the ability to fully demonstrate positive pressure and friction, and achieve the effect of smooth demonstration and simplified changes.
Inactive Publication Date: 2022-05-27
CHONGQING THREE GORGES UNIV
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Problems solved by technology
[0004] In view of the deficiencies of the above-mentioned technologies, the purpose of the present invention is to provide a teaching demonstration model for physical experiments, in order to solve the friction teaching demonstration model in the prior art, which does not have the ability to correct the relationship between normal pressure and friction. Problems with full presentation ability
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[0030] The following is further detailed in detail by specific embodiments:
[0031] as Figure 1-Figure 8As shown, a teaching demonstration model for physical experiments, it should be noted that the circuit part of the present demonstration model is the prior art, not too much elaboration in this technical solution, and it needs to be noted that the sliding varistor 19 is only connected to the circuit connected to the electromagnet 23 in the first skateboard, including the housing 1, the housing 1 is provided with a first spindle 3 inside, the lower part of the first spindle 3 is provided with a mounting plate 2 fixed to the first spindle 3 mount, and the first spindle 3 is provided side by side with the first skateboard, the second skateboard and the third skateboard, The first skateboard, the second skateboard and the third skateboard are provided with a chute 4 in the middle of the front, the chute 4 of the first skateboard is provided with a friction plate 6 that is stuck wit...
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The invention relates to the technical field of teaching demonstration models, in particular to a teaching demonstration model for physical experiments. Comprising a shell, a rotating shaft is arranged in the shell, a first sliding plate, a second sliding plate and a third sliding plate are arranged on the rotating shaft side by side, sliding grooves are formed in the middles of the front faces of the first sliding plate, the second sliding plate and the third sliding plate, and a friction plate connected with the sliding groove in a clamped mode is arranged in the sliding groove of the first sliding plate; one end of the first sliding plate is fixedly connected to the first rotating shaft, a plurality of evenly-distributed rollers are arranged in a sliding groove of the second sliding plate, the two ends of each roller are rotationally connected to the side wall of the sliding groove, one end of the second sliding groove is rotationally connected with the first rotating shaft, and one end of the third sliding plate is rotationally connected to the first rotating shaft. The technical scheme is used for solving the problem that a friction force teaching demonstration model in the prior art cannot comprehensively demonstrate the relation between the positive pressure and the friction force.
Description
Technical field [0001] The invention relates to the field of teaching demonstration model technology, and in particular to a teaching demonstration model for physical experiments. Background [0002] Two objects that come into contact with each other and squeeze, when they have relative motion or have a relative motion trend, will produce a force on the contact surface that hinders the relative motion or relative motion trend, this force is called friction, and the direction of friction is opposite to the direction of the relative motion or relative motion trend of the object. Friction can be divided into dynamic friction and static friction, and dynamic friction can be divided into sliding friction and rolling friction. [0003] From the friction expression f = μ * Fn, the friction influencing factor is the friction coefficient of the contact surface surface and the pressure on the object, and the demonstration model in the prior art usually only demonstrates the different frict...
Claims
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IPC IPC(8): G09B23/10
CPCG09B23/10
Inventor 许刚谢先姣王超群宋明欢
Owner CHONGQING THREE GORGES UNIV