CN2311034Y

CN2311034Y - Simple lever principle display

Info

Publication number: CN2311034Y
Application number: CN 97235410
Authority: CN
Inventors: 黄月异; 黄曾新; 戴文科
Original assignee: 黄月异
Priority date: 1997-09-02
Filing date: 1997-09-02
Publication date: 1999-03-17
Anticipated expiration: 2007-09-02

Abstract

The utility model relates to a simple and easy lever principle display, key feature include that central authorities have a lever in V type edge groove and a set of S type flat body structure law sign indicating number that is, on the lever on the upper fringe face of V type edge groove both sides each equidistance liftoff be equipped with law sign indicating number string groove, the lever both ends respectively are provided with a fine setting screw. The utility model has the advantages of simple structure, convenient adjustment, easy manufacture, easy weight unification, superposable storage and convenient carrying, and especially, the French code is S-shaped flat. Therefore, the device is particularly suitable for being made into laboratory instruments in laboratory type experimental boxes, and is used for hands of a great number of middle school students to learn various physicochemical principle experiments.

Description

Simple and easy lever principle display

The utility model relates to torgue measurement, is a kind of simple and easy lever principle display.

In physics,, when study has the equilibrium condition of object of fixed rotating shaft and chapters and sections such as simple and mechanical, all use physical concepts such as moment, lever principle when the balance of acquiring object.The simple title: the product of power F and arm of force L is moment M, and the equilibrium condition that the object of fixed rotating shaft is arranged is that the resultant couple that acts on the object equals zero.Lever principle mathematical expression FL ₂=PL ₁Represent that meaning is promptly being disregarded under the situation of useless resistance, the moment of power F equals the moment of effective resistance P.In the formula, L ₂Be the vertical range that power F is ordered to O, be called power arm; L ₁Be the vertical range that resistance P is ordered to O, be called resistance arm.In school, when learning this principle, generally all deepen understanding to do experiment, still, existing this class experimental apparatus or too simple, intuitive is not strong, or member is complicated, carries and use comparatively trouble.

The purpose of this utility model provide a kind of simple in structure, carry easy to operate, cheap simple and easy lever principle display, a large amount of experiments are used when learning moment and lever principle to be suitable for middle school student.

The utility model of realizing above-mentioned purpose includes lever and one group of weights that central authorities have a V-knife mouth groove, the pinnacle of V-knife mouth groove is the O point, the utility model respectively is being provided with the weights hanging groove on the lever equidistantly on the upper limb face of V-knife mouth groove both sides, the lever two ends respectively are provided with a fine adjustment screw; The S-type bluff body structure of weights.The effect of fine adjustment screw is to do the lever balance adjustment.When the utility model uses, at first the ogival of lever with its V-type groove is erected on the edge of a knife support, adjust the quality of balance of lever again with fine adjustment screw, the both sides of V-knife mouth groove all hang with S type bluff body weights on lever then, wherein the weights of a side is represented power, and the weights of opposite side is represented resistance.Like this, lever principle has just performed to have come out very intuitively.

Above-mentioned lever can be made horizontal, and promptly the shank portion of the V-knife mouth groove both sides of this lever is positioned on the same surface level, also can be made into tilting, and promptly the shank portion of the V-knife mouth groove both sides of this lever is mutually an angle.

The utility model has the advantages that simple in structurely, easy to adjust, particularly the S-type flat of weights is easy to manufacture, and weight is easily unified, hangs (two all can hang) easily, can stackedly deposit, and is easy to carry.So be particularly suitable for making the experimental apparatus in the Laboratary type experimental box,, do various mathematics, physics and chemistry original reason experiment study and use for numerous middle school student's staff one case.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of another embodiment of the utility model.

Embodiment of the present utility model as shown in drawings.See that by figure the lever 1 that central authorities have a V-knife mouth groove 3 is erected on the edge of a knife support 6 with the ogival of its V-knife mouth groove.Each is provided with weights hanging groove 2 equidistantly on the upper limb face of V-knife mouth groove 3 both sides on the lever 1; The two ends of lever 1 respectively are provided with a fine adjustment screw 5.Weights 4 S-type bluff body structures in the utility model, good putting all can be implemented in the inboard, two ends of this S type weights, and the promptly same weights company of enforcement is mutually hung.

Another embodiment of the present utility model shown in Figure 2 sees that lever 1 is made tilting, and the shank portion of V-knife mouth groove 3 both sides of lever 1 is mutually 150 degree angles.

Claims

1, a kind of central authorities that include have the lever of a V-knife mouth groove and the simple and easy lever principle display of one group of weights, it is characterized in that: each is provided with the weights hanging groove equidistantly on the upper limb face of V-knife mouth groove both sides on the lever, and the lever two ends respectively are provided with a fine adjustment screw; The S-type bluff body structure of weights.

2, according to the described simple and easy lever principle display of claim 1, it is characterized in that: the shank portion of the V-knife mouth groove both sides of lever is positioned on the same surface level, also is mutually an angle.