CN204332178U - Force balance law experimental provision - Google Patents
Force balance law experimental provision Download PDFInfo
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- CN204332178U CN204332178U CN201420824692.7U CN201420824692U CN204332178U CN 204332178 U CN204332178 U CN 204332178U CN 201420824692 U CN201420824692 U CN 201420824692U CN 204332178 U CN204332178 U CN 204332178U
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- protractor
- experimental provision
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- balance
- support ring
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Abstract
The utility model relates to a kind of force balance law experimental provision, particularly adopts the force balance law experimental provision of the circular all-round protractor of lightweight, belongs to experimental tool, teaching aid or study article.This experimental provision is made up of circular protractor, fine rule, spring balance and support ring, and support ring has hanging hole, and protractor has a center drilling; One end of fine rule is fixed together through the center drilling of protractor, and one end of the other end linking springs scale of fine rule, the other end of spring balance is hooked in the hanging hole on support ring.Experimental provision can connect many fine rules and spring balance, and the position being hooked in support ring upper hanging hole by adjusting the length of fine rule and spring balance changes size and the direction of power.The size of power directly reads from spring balance, the direction of power directly reads from protractor.This experimental provision has the features such as structure is simple, with low cost, easy to use, has a wide range of applications in Experiments of Machanics, the checking of force balance law and Learning Studies.
Description
Technical field
The utility model relates to a kind of force balance law experimental provision, particularly adopts the force balance law experimental provision of the circular all-round protractor of lightweight, belongs to experimental tool, teaching aid or study article.
Background technology
Power is vector, and existing size has direction again, and the synthesis of power or balance meet the vector of mathematics, and the computing of vector meets parallelogram law or Vector triangle.
Often run into vector or the equilibrium problem of multiple power in Physics Course, the synthesis due to multiple power be not very intuitively, comparatively abstract, the relation of its vector is also comparatively complicated, therefore needs to carry out by experiment demonstrating, verifying force balance principle.
Usual this kind of experiment can only do the test of two power relations, and needs usually also can only adopt easy manual operations when carrying out the experiment of multiple dynamic balance, and measure difficulty, precision is inaccurate, effect is very undesirable, affects quality of instruction and results of learning.
Summary of the invention
Technical problem to be solved in the utility model is:
1, the experimental provision simultaneously can measured multiple equilibrant;
2, experimental provision can change size and the direction of power easily;
3, the size of power and direction can directly read on experimental provision.
The utility model provides a kind of force balance law experimental provision.
Technical problem to be solved in the utility model is achieved through the following technical solutions.
A kind of force balance law experimental provision, tests for force balance; Force balance law experimental provision forms primarily of circular protractor, fine rule, spring balance and support ring, support ring has the hanging hole of distribution, and circular protractor has a center drilling; One end of many fine rules is fixed together through the center drilling of circular protractor, and one end of the other end linking springs scale of every root fine rule, the other end of spring balance is hooked in the hanging hole on support ring.
Circular protractor also can have multiple, and all or part of circular protractor is interconnected by fine rule and spring balance between center drilling, or part circular protractor is all connected with the circular protractor of spring balance and other by fine rule.
Support ring is circular rings, vesica piscis, polygon ring or irregularly shaped ring; Circular protractor adopts the circular all-round protractor of the lightweight of 360 calibration or 100 calibration; Fine rule also can adopt lightweight cord or lightweight bungee; Spring balance adopts lightweight mechanical spring scale or lightweight digital-display electronic weigher.
Force balance law experimental provision has two kinds of forms: the form of single circular protractor and the form of multiple circular protractor.In volume hornwork form, its multiple protractor forms a mechanical system, the circular protractor be connected with support ring in complicated mechanical system is called the outer protractor of mechanical system, and the protractor that only protractor circular with other is connected is called protractor in mechanical system.
The external force suffered by mechanical system that multiple circular protractor is formed is shown by the spring balance between circular protractor and support ring, and the inside interaction force between mechanical system inner circular protractor is shown by the spring balance between circular protractor.
Force balance law experimental provision is by connecting many fine rules at the hanging hole of support ring diverse location and spring balance is measured multiple power, tested.Force balance law experimental provision can be hooked in support ring upper hanging hole position by adjusting the length of fine rule and spring balance changes size and the direction of power easily.The size of power can directly read from spring balance, the direction of power can directly read from the all-round protractor of circle.
Form by multiple circular protractor the interaction force that force balance law experimental provision even can measure display mechanical system inside, show with making the interaction of invisible, abstract power and the mutual relationship simple, intuitive between inertial forces and applied external force.
Power is vector, meets vector calculus rule.But the computing of multiple power---vector then more complicated is abstract, force balance law experimental provision is a kind of instrument that image observation, accurately measurement and equilibrium law can be provided to verify.
Can be reached a conclusion by force balance experiment: one does not have the power perseverance suffered by the object of quality to balance, that is: the vector perseverance that zero mass object is stressed is zero.This conclusion is called zero mass stress balance law, is called for short stress balance law.
An inference can also be drawn thus: one does not have the perseverance of the moment of couple suffered by object of inertia to balance, that is: suffered by zero inertia object, the vector perseverance of the moment of couple is zero.This conclusion is called zero inertia moment of couple equilibrium law, is called for short moment of couple equilibrium law.
Inertia due to zero mass object is zero naturally, therefore zero mass object had not only met stress balance law, but also had met moment of couple equilibrium law, then two law unified presentation for: one does not have the perseverance of the power suffered by the object of quality balance, suffered moment of couple perseverance balance, that is: the vector perseverance that zero mass object is stressed is zero, the vector perseverance of the suffered moment of couple is zero.This conclusion is called: zero mass force balance law, is called for short: force balance law or power homeostasis rule.
Choosing any point for turning the heart or any dead axle, another one inference can be obtained: one does not have the perseverance of the moment suffered by object of inertia to balance, that is: the vector perseverance of zero inertia object Moment is zero.This conclusion is called zero moment of inertia equilibrium law, is called for short equalising torque law.Because the measurement of moment is more easier than the measurement of the moment of couple, therefore equalising torque law is more conventional.
Force balance law can also be expressed as thus: one does not have the perseverance of the power suffered by the object of quality balance, suffered moment perseverance balance, that is: the vector perseverance that zero mass object is stressed is zero, the vector perseverance of Moment is zero.
The circular protractor of force balance law experimental provision, fine rule and spring balance are lightweight object, and quality very I is approximately zero, forms the stressed relation character joint force equilibrium law of mechanical system thus.Because moment is product that is stressed and counter stress arm lengths, therefore pass through the analysis to force balance experimental data and calculating, force balance law can be verified.
Force balance law experimental provision is the measurement mechanism in the strong size of band and direction, there is the features such as structure is simple, with low cost, easy to use, have a wide range of applications in Experiments of Machanics, the checking of force balance law, Learning Studies and teaching practice activity.
Accompanying drawing explanation
The force balance law experimental provision that Fig. 1 is made up of circular support ring and single circular protractor.
The force balance law experimental provision that Fig. 2 is made up of square support ring and single circular protractor.
The force balance law experimental provision that Fig. 3 is made up of oval-shaped support ring and two circular protractors.
The force balance law experimental provision that Fig. 4 is made up of rectangle support ring and two circular protractors.
The force balance law experimental provision that Fig. 5 is made up of circular support ring and three circular protractors.
The force balance law experimental provision that Fig. 6 is made up of irregularly shaped support ring and four circular protractors.
The force balance law experimental provision that Fig. 7 is made up of irregularly shaped support ring and four circular protractors.
The object that in figure, each digital code mark represents is as follows:
1, circular protractor 2, fine rule 3, spring balance 4, center drilling 5, support ring 6, hanging hole
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
Embodiment
A kind of force balance law experimental provision, for force balance experiment, also may be used for Experiments of Machanics, the checking of force balance law and Learning Studies simultaneously.
The structure of the force balance law experimental provision be made up of circular support ring and single circular protractor as shown in Figure 1.
The structure of the force balance law experimental provision be made up of square support ring and single circular protractor as shown in Figure 2.
The structure of the force balance law experimental provision be made up of oval-shaped support ring and two circular protractors as shown in Figure 3.
The structure of the force balance law experimental provision be made up of rectangle support ring and two circular protractors as shown in Figure 4.
The structure of the force balance law experimental provision be made up of circular support ring and three circular protractors as shown in Figure 5.
The structure of the force balance law experimental provision be made up of irregularly shaped support ring and four circular protractors as shown in Figures 6 and 7.
Force balance law experimental provision forms primarily of circular protractor 1, fine rule 2, spring balance 3, support ring 5.Support ring 5 adopts becket or plastic hoop, support ring 5 has the single row or multiple rows hanging hole 6 of distribution.Circular protractor 1 has a less center drilling 4, center drilling 4 is also known as line concentration hole, one end of many fine rules 2 is passed the center drilling 4 of circular protractor 1 and passes through knotting, adhesion or tie up the forms such as a small articles to be fixed together, the other end of every root fine rule 2 is connected to one end of corresponding spring balance 3 by modes such as knottings, the other end of spring balance 3 is hooked in the hanging hole 6 li on support ring 5.
Circular protractor 1 can have multiple, be interconnected by fine rule 2 and spring balance 3 between the whole circular protractor 1 of some experimental provision, be interconnected by fine rule 2 and spring balance 3 between the part circular protractor 1 of some experimental provision, some experimental provision has part circular protractor 1 to be all connected by the circular protractor 1 of fine rule 2 and spring balance 3 and other.
Support ring 5 adopts circular rings, vesica piscis, polygon ring or irregularly shaped ring.
Fine rule 2 adopts lightweight cord or lightweight bungee, the size of adjustment pulling force of being more convenient for whippy bungee.
Circular protractor 1 adopts the all-round protractor of the circle of 360 calibration or 100 calibration, and 100 calibration are relatively more directly perceived.
Circular protractor 1 adopts the circular protractor of lightweight, can reduce because the deadweight of protractor 1 is on the impact of measurement result.
Spring balance 3 adopts lightweight mechanical spring scale or lightweight digital-display electronic weigher, can reduce because the deadweight of spring balance 3 is on the impact of measurement result.
Due to all high resiliences of mechanical spring scale and bungee, mechanical spring scale and bungee stressed time all can produce tensile deformation, mechanical spring scale coordinates with lightweight cord, digital-display electronic weigher coordinates with bungee, particularly mechanical spring scale coordinate with bungee, during use the adjustment of pulling force size be very easy to, convenient.
Force balance law experimental provision carries out experiments of measuring by many fine rules 2 and multiple spring balance 3 to multiple pulling force simultaneously, and can by changing the size of the length adjustment pulling force of fine rule 2.
Support ring 5 is circular rings, vesica piscis or polygon ring, also can be irregularly shaped ring, and on support ring 5, the hanging hole 6 of distribution is convenient to spring balance 3 and is fixed on diverse location on support ring 5 by making hook, the Impact direction of adjustment fine rule 2.
Force balance law experimental provision due to the position in spring balance 3 hook holes 6 different time its hanging hole 6 also different to the distance of circular protractor 1 center drilling 4, thus spring balance 3 also naturally have adjusted the pulling force size of fine rule 2 while adjustment hanging hole 6 position, contributes to producing rich and varied stress data.
The size that its fine rule 2 of force balance law experimental provision of single circular protractor is stressed can directly read from the spring balance 3 be attached thereto, stressed direction can directly read from the circular protractor 1 be attached thereto.
The size that its fine rule 2 of force balance law experimental provision of multiple circular protractor is stressed also can directly read from the spring balance 3 be attached thereto.Between two adjacent circular protractors 1 be directly connected by fine rule 2 and spring balance 3, the differential seat angle of reference direction is the angular readings sum of fine rule 2 on two adjacent circular protractors 1 and the difference of half cycle angle.All circular protractors 1 can be corrected to same direction by unified for references angle accordingly, and the stressed direction of fine rule 2 can directly from circular protractor 1 reading be attached thereto; Or the direction that circular protractor 1 records carries out superposing the direction being institute's dynamometry relative to certain differential seat angle with reference to circular protractor reference direction with this circular protractor reference direction.
Making a concerted effort suffered by object
for making a concerted effort suffered by zero mass object
resultant couple square suffered by object or resultant moment
for the resultant couple square suffered by zero inertia object or resultant moment
The circular protractor of force balance law experimental provision, fine rule and spring balance are all lightweight object, therefore less to the stressing influence on fine rule, special in the pulling force on fine rule is larger, the deadweight of circular protractor, fine rule and spring balance can be ignored the impact of stressed measurement.
Stress balance law and equalising torque law and force balance law can be verified comparatively accurately by the experiment of force balance law experimental provision and calculating.
The inertia of zero mass object is zero, and lightweight object can be considered that quality is zero, and therefore the force analysis of lightweight object, moment of couple analysis or torque analysis meet force balance law principle.
Because in mechanical analysis with research, the use of lightweight object is very general, therefore, the application of force balance law widely, thus also has very large using value for force balance experiment, the checking of force balance law with the force balance law experimental provision of research.
Claims (3)
1. a force balance law experimental provision, tests for force balance; It is characterized in that:
Force balance law experimental provision forms primarily of circular protractor, fine rule, spring balance and support ring, support ring has the hanging hole of distribution, and circular protractor has a center drilling; One end of many fine rules is fixed together through the center drilling of circular protractor, and one end of the other end linking springs scale of every root fine rule, the other end of spring balance is hooked in the hanging hole on support ring.
2., by force balance law experimental provision according to claim 1, it is characterized in that:
Described circular protractor also can have multiple, and all or part of circular protractor is interconnected by fine rule and spring balance between center drilling, or part circular protractor is all connected with the circular protractor of spring balance and other by fine rule.
3., by force balance law experimental provision according to claim 1 or claim 2, it is characterized in that:
Described support ring is circular rings, vesica piscis, polygon ring or irregularly shaped ring;
Described circular protractor adopts the circular all-round protractor of the lightweight of 360 calibration or 100 calibration;
Described fine rule also can adopt lightweight cord or lightweight bungee;
Described spring balance adopts lightweight mechanical spring scale or lightweight digital-display electronic weigher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420824692.7U CN204332178U (en) | 2014-12-23 | 2014-12-23 | Force balance law experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420824692.7U CN204332178U (en) | 2014-12-23 | 2014-12-23 | Force balance law experimental provision |
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| CN204332178U true CN204332178U (en) | 2015-05-13 |
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| CN201420824692.7U Expired - Fee Related CN204332178U (en) | 2014-12-23 | 2014-12-23 | Force balance law experimental provision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485039A (en) * | 2014-12-23 | 2015-04-01 | 朱嘉慧 | Acting force equilibrium law experimental device |
-
2014
- 2014-12-23 CN CN201420824692.7U patent/CN204332178U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485039A (en) * | 2014-12-23 | 2015-04-01 | 朱嘉慧 | Acting force equilibrium law experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20151223 |
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| EXPY | Termination of patent right or utility model |