CN204706235U - A kind of relative motion demonstrator - Google Patents
A kind of relative motion demonstrator Download PDFInfo
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- CN204706235U CN204706235U CN201520346111.8U CN201520346111U CN204706235U CN 204706235 U CN204706235 U CN 204706235U CN 201520346111 U CN201520346111 U CN 201520346111U CN 204706235 U CN204706235 U CN 204706235U
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- driving wheel
- wheel
- car
- relative motion
- cotton rope
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- 230000033001 locomotion Effects 0.000 title claims abstract description 75
- 229920000742 Cotton Polymers 0.000 claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001633942 Dais Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model embodiment discloses a kind of relative motion demonstrator, relate to teaching equipment field, comprise: showing stand and N number of dolly, described showing stand comprises display platform, described display platform is provided with the combination of N number of power wheel, described display platform is provided with traction wheel, described traction wheel comprises the driving wheel of the coaxial rotation of N number of different radii, described traction wheel drives described moving of car by the cotton rope walking around the combination of described power wheel, each driving wheel group crossed belt moves a moving of car, the driving wheel of different radii connects a power wheel combination respectively, wherein, N is more than or equal to 2.The purpose of this utility model is to provide a kind of relative motion demonstrator, to improve the ability that student understands and grasps relative motion knowledge.
Description
Technical field
The utility model relates to teaching equipment field, in particular to a kind of relative motion demonstrator.
Background technology
The motion of any object all changes along with the change of time relative to the position of another (supposing motionless) object.To the research of same object, due to the difference that reference frame is chosen, the conclusion often obtained is also different, and this is called motion composition.That is, when studying the motion of A object, selection B is reference, assuming that B is motionless.When the position of A object and B object has changed, be just A relative to B in motion; If the position of A object and B object does not change, just make A static relative to B.
Present teaching method still adopts traditional teaching method, i.e. method of lecture.This method seems abstract to " relative motion " and the instruction of " motion composition ", student can not be allowed to understand phenomenon intuitively, make teaching efficiency not good.
Utility model content
The purpose of this utility model is to provide a kind of relative motion demonstrator, directly perceived with it, vivid demonstration, improves student to the understanding of relative motion and grasp.
First aspect, a kind of relative motion demonstrator that the utility model embodiment provides, comprise: showing stand and N number of dolly, described showing stand comprises display platform, described display platform is provided with the combination of N number of power wheel, described display platform is provided with traction wheel, described traction wheel comprises the driving wheel of the coaxial rotation of N number of different radii, described traction wheel drives described moving of car by the cotton rope walking around the combination of described power wheel, each driving wheel group crossed belt moves a moving of car, the driving wheel of different radii connects a power wheel combination respectively, and wherein, N is more than or equal to 2.
In conjunction with first aspect, the utility model embodiment still provides the first possibility embodiment of first aspect, wherein, described power wheel combination comprises two fixed pulleys, two fixed pulleys are arranged on the two ends of the length direction of described display platform respectively, described traction wheel drives described dolly to move along the length direction of described display platform by the cotton rope walking around the combination of described power wheel, and the direction of motion of different dolly is parallel to each other.
In conjunction with the first possibility embodiment of first aspect, the utility model embodiment still provides the second possibility embodiment of first aspect, wherein, described N equals 3, the center of each driving wheel is provided with annulus, three described driving wheels are respectively the first driving wheel, the second driving wheel and the 3rd driving wheel, the radius of described first driving wheel, the second driving wheel and the 3rd driving wheel increases gradually, the center of three described driving wheels is fixedly mounted in rotating shaft, and described rotating shaft drives the equidirectional rotation simultaneously of three driving wheels.
The second in conjunction with first aspect may embodiment, and the utility model embodiment still provides the third of first aspect may embodiment, wherein, each described driving wheel edge be equipped with Baltimore groove.
In conjunction with the third possibility embodiment of first aspect, the utility model embodiment still provides the 4th kind of possibility embodiment of first aspect, and wherein, described rotating shaft is provided with the handle for shaking described axis of rotation.
In conjunction with the 4th kind of possibility embodiment of first aspect, the utility model embodiment still provides the 5th kind of possibility embodiment of first aspect, wherein, described showing stand comprises the support for supporting described display platform, and described traction wheel is installed on the bracket.
In conjunction with the 5th kind of possibility embodiment of first aspect, the utility model embodiment still provides the 6th kind of possibility embodiment of first aspect, wherein, described N equals 3, three dollies are respectively the first dolly, second dolly, 3rd dolly, three transmission group combinations are respectively the first power wheel combination, second power wheel combination, 3rd power wheel combination, described first driving wheel is by driving described first moving of car around the cotton rope of described first power wheel combination, described second driving wheel is by driving described second moving of car around the cotton rope of described second power wheel combination, 3rd driving wheel is by driving described 3rd moving of car around the cotton rope of described 3rd power wheel combination.
In conjunction with the 6th kind of possibility embodiment of first aspect, the utility model embodiment still provides the 7th kind of possibility embodiment of first aspect, wherein, the point of contact of the cotton rope of described first moving of car and described first driving wheel is driven to be positioned at the below of the central point of described first driving wheel, drive the point of contact of the cotton rope of described second moving of car and described second driving wheel to be positioned at the below of the central point of described second driving wheel, drive the point of contact of the cotton rope of described 3rd moving of car and described 3rd driving wheel to be positioned at the top of the central point of described 3rd driving wheel.
In conjunction with the 7th kind of possibility embodiment of first aspect, the utility model embodiment still provides the 8th kind of possibility embodiment of first aspect, wherein, the point of contact of the cotton rope of described first moving of car and described first driving wheel is driven to be positioned at the below of the central point of described first driving wheel, drive the point of contact of the cotton rope of described second moving of car and described second driving wheel to be positioned at the top of the central point of described second driving wheel, drive the point of contact of the cotton rope of described 3rd moving of car and described 3rd driving wheel to be positioned at the top of the central point of described 3rd driving wheel.
In conjunction with the third possibility embodiment of first aspect, the utility model embodiment still provides the 9th kind of possibility embodiment of first aspect, and wherein, the degree of depth of described Baltimore groove is 0.5 centimetre.
The utility model embodiment realizes the demonstration of relative motion by the connection of the driving wheel with different radii, such as, the radius of the driving wheel be connected with the cotton rope of the dolly in front motion is less than the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes the demonstration of catching up with, surmounting (more and more nearer in the same way) coming up with motion; Such as, the radius of the driving wheel be connected with the cotton rope of the dolly in front motion is greater than the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes the time delay away from motion (more and more far away); The radius of the driving wheel be connected with the cotton rope of the dolly in front motion equals the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes the demonstration of synchronized in the same way motion (geo-stationary).In addition, the direction of motion of two dollies can also be realized by the change of the connected mode of cotton rope and driving wheel inconsistent, thus realize the demonstration that (oppositely more and more nearer) in opposite directions move.
Therefore, compared with the mode of imparting knowledge to students with the instruction of prior art, by the demonstration of described demonstrator, have expressed principle and the form of expression of relative motion more intuitively, effectively improve the efficiency of the knowledge point of student's understanding and grasp relative motion.
Other feature and advantage of the present utility model are set forth at instructions subsequently, and, partly become apparent from instructions, or understand by implementing the utility model embodiment.The purpose of this utility model and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Shown in accompanying drawing, above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing by physical size equal proportion convergent-divergent, focus on purport of the present utility model is shown.
Fig. 1 shows the structural drawing of a kind of relative motion demonstrator that the utility model embodiment provides;
Fig. 2 shows the structural drawing of the another kind of relative motion demonstrator that the utility model embodiment provides;
Fig. 3 shows the structural drawing of the traction wheel of a kind of relative motion demonstrator that the utility model embodiment provides;
Fig. 4 shows the structural drawing of the display platform of a kind of relative motion demonstrator that the utility model embodiment provides.
Accompanying drawing marks: display platform 101, support 102, traction wheel 200, dolly 300, the first driving wheel 201, second driving wheel the 202, three driving wheel 203, first dolly 301, second dolly 302,3rd dolly 303, first fixed pulley 401, second fixed pulley 402, the 3rd fixed pulley 403, the 4th fixed pulley 404, the 5th fixed pulley the 405, six fixed pulley 406.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, carry out clear, complete description to the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The motion of any object all changes along with the change of time relative to the position of another (supposing motionless) object.To the research of same object of which movement, due to the difference that reference frame is chosen, the conclusion often obtained is also different, and this is called motion composition.That is, study the motion of A object, selection B is reference, assuming that B is motionless.When the position of A object and B object has changed, be just A relative to B in motion; If the position of A object and B object does not change, just make A static relative to B.
Present teaching method still adopts traditional teaching method, i.e. method of lecture.This method seems abstract to " relative motion " and the instruction of " motion composition ", student can not be allowed to understand physical phenomenon intuitively, make teaching efficiency not good.
In order to overcome the problems referred to above, as shown in Figure 1, the utility model embodiment provides a kind of relative motion demonstrator, comprise: showing stand and N number of dolly 300, described showing stand comprises display platform 101, described display platform 101 is provided with the combination of N number of power wheel, described display platform 101 is provided with traction wheel 200, described traction wheel 200 comprises the driving wheel of the coaxial rotation of N number of different radii, described traction wheel 200 drives described dolly 300 to move by the cotton rope walking around the combination of described power wheel, each driving wheel group crossed belt moves a moving of car, the driving wheel of different radii connects a power wheel combination respectively, wherein, N is more than or equal to 2, the utility model embodiment N equals 3.Described showing stand comprises the support 102 for supporting described display platform, and described traction wheel 200 is arranged on described support 102.
Described power wheel combination comprises two fixed pulleys, as shown in Figure 4, one has six fixed pulleys, be respectively the first fixed pulley 401, second fixed pulley 402, the 3rd fixed pulley 403, the 4th fixed pulley 404, the 5th fixed pulley 405 and the 6th fixed pulley 406, described dolly is three, is respectively the first dolly 301, second dolly 302 and the 3rd dolly 303.
The left end of the length direction of described display platform 101 installs described first fixed pulley 401, 3rd fixed pulley 403 and the 5th fixed pulley 405, the right-hand member of the length direction of described display platform 101 installs described second fixed pulley 402, 4th fixed pulley 404 and the 6th fixed pulley 406, described first fixed pulley 401 and described second fixed pulley 402 are wound with a cotton rope, cotton rope between described first fixed pulley 401 and described second fixed pulley 402 drives the first dolly 301, described 3rd fixed pulley 403 and the 4th fixed pulley 404 are wound with one bar of cotton rope, cotton rope between described 3rd fixed pulley 403 and the 4th fixed pulley 404 drives described second dolly 302, one bar of cotton rope is full of by described 5th fixed pulley 405 and the 6th fixed pulley 406, cotton rope between described 5th fixed pulley 405 and the 6th fixed pulley 406 drives described 3rd dolly 303.
As shown in Figure 3, described traction wheel 200 comprises three driving wheels, described three driving wheels are respectively the first driving wheel 201, second driving wheel 202 and the 3rd driving wheel 203, the radius of described first driving wheel 201, second driving wheel 202 and the 3rd driving wheel 203 increases gradually, the center of three described driving wheels is fixedly mounted in rotating shaft, and described rotating shaft drives the equidirectional rotation simultaneously of three driving wheels.
Such as, in the utility model embodiment, be processed into three planks or round log that diameter is respectively 5 centimetres, 10 centimetres, three circular wheel of 15 cm do driving wheel, each edge of taking turns is processed into the groove that the degree of depth is about 0.5 centimetre, then does axis hole in the hole that centre drill width of three driving wheels is suitable.
Circular wheel different for three diameters is stacked together according to the order that diameter is ascending, axle is done in the center pit penetrating three driving wheels with one end of a Z-shaped Metallic rod, the one end penetrating the Metallic rod of three driving wheels is provided with screw thread, with nut, three circle wheels are fixed together with rotating shaft, the other end of described Z-shaped metal tube is provided with crank handle, handle 204 as shown in Figure 2, preferably, described handle 204 can arrange antiskid thread.
Again three little automobile-used three cotton ropes are connected respectively.One end of every root cotton rope is fixed on dolly, the other end walks around a fixed pulley, walking around a driving wheel, after driving wheel Shangrao one is enclosed, the fixed pulley walking around the other end of described display platform 101 connects described dolly, degree of tightness adjustment is suitable, and then, remaining two dolly adopts mode identical therewith to connect.Shake rotary handle, three driving wheel equidirectional rotations simultaneously, drive three dollies to move with different speed together.
The embodiment of the utility model embodiment can be:
(1) homodromous demonstration.In the utility model embodiment, by the first dolly 301 called after A, by the second dolly called after B, by the 3rd dolly called after C.
Relative motion demonstrator the utility model embodiment provided is placed on dais, reconciles the position of three dollies.Such as, A car is (the most right side) up front, and be connected by driving wheel minimum to A car and radius, namely A car connects the first driving wheel 201; B car, in centre, is connected the second driving wheel 202 by B car; C car is face (most the left side) in the end, and C car is connected the 3rd driving wheel 203.
Then rotate to drive three dollies to move right together with different speed with three driving wheels that swinging handle makes diameter different simultaneously.At this moment, C vehicle speed is the fastest, and A vehicle speed is the slowest, and B vehicle speed is between therebetween, and this motion is exactly " pursuing and attacking " problem.In fact dolly can be placed in different positions, then dolly is connected with the driving wheel of different-diameter, just can demonstrate various having moved.
(2) demonstration of move toward one another.On the homodromous basis of above-mentioned demonstration, the coiling be connected is connected on B car after the second driving wheel 202 superinverse is rich, as shown in Figure 2 with B car.Swinging handle, now the direction of motion of B car is contrary with the direction of A car and C car, therefore just achieves the demonstration of relative motion.
In sum, utilize the relative motion demonstrator that the utility model embodiment provides, the demonstration of the various phenomenons of the relative motions such as object moves in the same way, counter motion, rapid movement, microinching can be realized.Not only directly perceived but also understand with this cover demonstrator demonstration relative motion, student is readily appreciated that the various problems such as relative motion.
Therefore, the utility model embodiment realizes the demonstration of relative motion by the connection of the driving wheel with different radii, such as, the radius of the driving wheel be connected with the cotton rope of the dolly in front motion is less than the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes the demonstration coming up with motion (more and more nearer in the same way); Such as, the radius of the driving wheel be connected with the cotton rope of the dolly in front motion is greater than the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes relatively away from the demonstration of motion (more and more far away in the same way); The radius of the driving wheel be connected with the cotton rope of the dolly in front motion equals the radius of the driving wheel connected at the cotton rope of the dolly of rear motion, realizes the demonstration of synchronized in the same way motion (geo-stationary).In addition, the direction of motion of two dollies can also be realized by the change of the connected mode of cotton rope and driving wheel inconsistent, thus realize the demonstration that (oppositely more and more nearer) in opposite directions move.
Therefore, compared with the mode of imparting knowledge to students with the instruction of prior art, by the demonstration of described demonstrator, have expressed principle and the form of expression of relative motion more intuitively, effectively improve student to the understanding of relative motion and grasp.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a relative motion demonstrator, it is characterized in that, comprise: showing stand and N number of dolly, described showing stand comprises display platform, described display platform is provided with the combination of N number of power wheel, described display platform is provided with traction wheel, described traction wheel comprises the driving wheel of the coaxial rotation of N number of different radii, described traction wheel drives described moving of car by the cotton rope walking around the combination of described power wheel, each driving wheel group crossed belt moves a moving of car, the driving wheel of different radii connects a power wheel combination respectively, and wherein, N is more than or equal to 2.
2. relative motion demonstrator according to claim 1, it is characterized in that, described power wheel combination comprises two fixed pulleys, two fixed pulleys are arranged on the two ends of the length direction of described display platform respectively, described traction wheel drives described dolly to move along the length direction of described display platform by the cotton rope walking around the combination of described power wheel, and the direction of motion of different dolly is parallel to each other.
3. relative motion demonstrator according to claim 2, it is characterized in that, described N equals 3, the center of each driving wheel is provided with annulus, three described driving wheels are respectively the first driving wheel, the second driving wheel and the 3rd driving wheel, the radius of described first driving wheel, the second driving wheel and the 3rd driving wheel increases gradually, and the center of three described driving wheels is fixedly mounted in rotating shaft, and described rotating shaft drives the equidirectional rotation simultaneously of three driving wheels.
4. relative motion demonstrator according to claim 3, is characterized in that, each described driving wheel edge be equipped with Baltimore groove.
5. relative motion demonstrator according to claim 4, is characterized in that, described rotating shaft is provided with the handle for shaking described axis of rotation.
6. relative motion demonstrator according to claim 5, is characterized in that, described showing stand comprises the support for supporting described display platform, and described traction wheel is installed on the bracket.
7. relative motion demonstrator according to claim 6, it is characterized in that, described N equals 3, three dollies are respectively the first dolly, second dolly, 3rd dolly, three transmission group combinations are respectively the first power wheel combination, second power wheel combination, 3rd power wheel combination, described first driving wheel is by driving described first moving of car around the cotton rope of described first power wheel combination, described second driving wheel is by driving described second moving of car around the cotton rope of described second power wheel combination, 3rd driving wheel is by driving described 3rd moving of car around the cotton rope of described 3rd power wheel combination.
8. relative motion demonstrator according to claim 7, it is characterized in that, the point of contact of the cotton rope of described first moving of car and described first driving wheel is driven to be positioned at the below of the central point of described first driving wheel, drive the point of contact of the cotton rope of described second moving of car and described second driving wheel to be positioned at the below of the central point of described second driving wheel, drive the point of contact of the cotton rope of described 3rd moving of car and described 3rd driving wheel to be positioned at the top of the central point of described 3rd driving wheel.
9. relative motion demonstrator according to claim 7, it is characterized in that, the point of contact of the cotton rope of described first moving of car and described first driving wheel is driven to be positioned at the below of the central point of described first driving wheel, drive the point of contact of the cotton rope of described second moving of car and described second driving wheel to be positioned at the top of the central point of described second driving wheel, drive the point of contact of the cotton rope of described 3rd moving of car and described 3rd driving wheel to be positioned at the top of the central point of described 3rd driving wheel.
10. relative motion demonstrator according to claim 4, is characterized in that, the degree of depth of described Baltimore groove is 0.5 centimetre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346111.8U CN204706235U (en) | 2015-05-26 | 2015-05-26 | A kind of relative motion demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346111.8U CN204706235U (en) | 2015-05-26 | 2015-05-26 | A kind of relative motion demonstrator |
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| Publication Number | Publication Date |
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| CN204706235U true CN204706235U (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520346111.8U Expired - Fee Related CN204706235U (en) | 2015-05-26 | 2015-05-26 | A kind of relative motion demonstrator |
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| CN (1) | CN204706235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370200A (en) * | 2016-10-11 | 2017-02-01 | 张远程 | Motion parameter measurement device of car |
-
2015
- 2015-05-26 CN CN201520346111.8U patent/CN204706235U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370200A (en) * | 2016-10-11 | 2017-02-01 | 张远程 | Motion parameter measurement device of car |
| CN106370200B (en) * | 2016-10-11 | 2023-08-15 | 南京南华航空产业有限公司 | Motion parameter measuring device of vehicle |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 |