CN104157204A - Multifunctional mechanical principle display teaching aid - Google Patents
Multifunctional mechanical principle display teaching aid Download PDFInfo
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- CN104157204A CN104157204A CN201410414421.9A CN201410414421A CN104157204A CN 104157204 A CN104157204 A CN 104157204A CN 201410414421 A CN201410414421 A CN 201410414421A CN 104157204 A CN104157204 A CN 104157204A
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Abstract
The invention provides a multifunctional mechanical principle display teaching aid, relating to a mechanical principle display teaching aid. The multifunctional mechanical principle display teaching aid is provided with a crank rocker mechanism, a waterwheel, a bottom plate, a waterwheel transmission shaft, a vertical bevel gear, a horizontal bevel gear, a bevel gear shaft, a belt wheel, a grinding disc, a grinding disc base, a driven crank, a driving crank, a double-crank connecting rod, a double-rocker mechanism, a baffle plate, a disc cam, a cam shaft, a sieve disc, a speed changer, a well, a left supporting frame, a right supporting frame, a handle, a ratchet wheel, a ratchet pawl, a spring, and a vertical plate. The double-rocker mechanism is provided with a driving rocker, a driven rocker, and a double-rocker connecting rod. The speed changer is provided with an upper transmission shaft, a power cam shaft, a power input shaft and a speed changing handle. The crank rocker mechanism is provided with a connecting rod, a driven rod, a driving rod, a blender, a ramming tank, and a support frame. The multifunctional mechanical principle display teaching aid has the advantages of abundant functions and simple and reasonable structure, the simplification of the complicated mechanical knowledge can be realized, the abstract theory becomes concrete and vivid, the boring content becomes interesting, and the teaching effect is effectively improved.
Description
Technical field
The present invention relates to mechanical principle demonstration teaching aid, especially relate to a kind of multi-functional mechanical principle and show teaching aid.
Background technology
Along with developing rapidly of Chinese Industrialization, particularly manufacturing development, society is increasing to the demand for talent of mechanical relevant speciality.< < mechanical principle > > is one of most important Main Course of mechanical speciality, and the teaching of this course is significant, therefore needs suitable teaching aid as auxiliary.Current more existing teaching aid functions are more single, and structure is too complicated, do not break away from complexity and uninteresting theory, can not significantly improve the efficiency of teaching.
Chinese patent CN201984710U has introduced a kind of demonstration teaching aid of four-bar linkage principle, although this teaching aid can show that three kinds of four-bar linkage are dissimilar intuitively, but displaying process has only embodied the operational process of mechanism, the combination of unrealized and practical application scene, can not change the uninteresting character of < < mechanical principle > > this subject itself, therefore be difficult to obtain good teaching efficiency.Chinese patent CN103514796A has introduced a kind of crank and rocker mechanism demonstration teaching aid for imparting knowledge to students, although the scene of this teaching aid simulation recreation ground sea rover can increase interest to a certain extent, but the function of teaching aid is too single, and the scope of application is narrower, and economy is poor.Chinese patent CN103632604A and CN103745645A have introduced respectively a kind of Multifunctional teaching aid and a kind of multi-functional mechanical theory teaching demonstrator based on linkage assembly.Although these two described teaching aids of patent are all Multifunctional teaching aids, can show multiple physical construction and different knowledge points, their complicated structure, intuitive is poor.
Summary of the invention
The object of the present invention is to provide a kind of multi-functional mechanical principle to show teaching aid.
The present invention is provided with crank and rocker mechanism, waterwheel, base plate, waterwheel transmission shaft, vertical bevel gear, horizontal bevel gear, bevel gear shaft, belt wheel, mill, mill base, driven crank, driving crank, double-crank connecting rod, double rocker mechanism, baffle plate, disc cam, camshaft, screen tray, variator, well, left support frame, right support frame, handle, ratchet, ratchet, spring, riser;
Described double rocker mechanism is provided with drive crank, driven rocking bar, double rocking lever connecting rod;
Described variator is provided with top transmission shaft, power cam axle, power input shaft and gear change hand lever;
Described crank and rocker mechanism is provided with connecting link, follower lever, driving lever, stamping machine, smashes tank, bracing frame;
Described waterwheel is positioned at base plate right side, power resources as whole teaching aid, waterwheel transmission shaft one end is connected by pin with waterwheel, the waterwheel transmission shaft other end is connected with vertical bevel gear, vertically bevel gear and horizontal bevel gear engagement, thereby rotation direction is changed into, horizontally rotate, and rotate by bevel gear shaft band movable belt pulley;
Described mill is positioned at the base plate upper left corner, mill is arranged on mill base top, mill top is provided with driven crank, driving crank, double-crank connecting rod, driving crank and belt wheel are connected on same axis, belt wheel drives driving crank motion, and drive double-crank mechanism, thereby mill is normally worked;
Described double rocker mechanism is positioned at the base plate lower left corner, and drive crank is provided with baffle plate, and baffle plate below is a disc cam, disc cam is fixed on camshaft, by camshaft, rotate to drive disc cam to rotate, thereby drive drive crank motion, drive screen tray to move up and down;
Described crank and rocker mechanism is positioned at gearbox case left side, and driving link is connected with the top transmission shaft of variator, and stamping machine is pumped;
Described variator is positioned at the base plate lower right corner, top transmission shaft, power cam axle and power input shaft are located in gearbox case, power cam axle and power input shaft are provided with three groups of gears, variator below is provided with gear change hand lever, by gear change hand lever, change synchronizer position, thereby change gear combination, realizes speed change;
Described well is positioned at base plate left side central portion, well top is provided with left support frame and right support frame, handle is fixed on left support frame and right support frame by bearing, handle right side connects ratchet, ratchet contacts with ratchet, and ratchet is arranged on riser, and by spring connection board and ratchet afterbody, thereby realize the one-way movement of handle, play Anti-fall effect.
The number of teeth of described three groups of gears can be respectively 20,30,40, and module can be 2.0.
On described variator, synchronizer is housed, can realizes simply the conversion between rotating speed by synchronizer.
The number of teeth of described ratchet can be 12, and pressure angle can be 20 °, can allow anticlockwise rotation, and hinder clockwise rotation, thereby effectively realize the effect that prevents that bucket from falling.
The base radius of described disc cam can be 20mm, for promoting push rod, pumps, thus the swing of the driving link of promotion double rocking lever.
Waterwheel of the present invention is arranged on the right side of base as power resources; Velocity reversal throw-over gear is positioned at base first half right side, by transmission shaft, is connected with waterwheel, and inside is provided with bevel-gear sett, for by vertical direction rotational transform being horizontal direction rotation; Described mill is positioned at the first half left side of base, uses double-crank mechanism to drive; Wheel box is positioned at base Lower Half right side, fixed shaft gear train, consists of; Stamping machine is positioned at wheel box left side, uses crank and rocker mechanism to drive; Sieve is positioned at base Lower Half left side, uses double rocker mechanism to drive; Cam is positioned at double rocking lever driving link bottom, for promoting driving link to-and-fro movement; Well is positioned in the middle of mill and sieve; Ratchet is positioned at one end of well water lift handle, prevents that in water lift process, well drops; Above-mentioned various piece is respectively as a module, and whole teaching aid carries out modular design, can be comprised of modules splicing, also can dismantle as required.
As can be seen here, the present invention has following remarkable advantage:
1, by the environment of ancient water mill, show mechanical relevant knowledge, improve classroom interest, stimulating students ' interests, has reached the effect of teaching through lively activities.Meanwhile, function of the present invention is abundanter, and more specifically, structure is advantages of simple more for exhibition method, and teaching efficiency is better.
2, the operational process of showing respectively double-crank mechanism, crank and rocker mechanism, double rocker mechanism by mill, stamping machine, sieve three's the course of work.And San Zhong mechanism is identical respectively by four pole lengths of control variate method San Zhong mechanism, but the position difference at frame place is shown the formation condition of San Zhong mechanism.
3, in San Zhong of the present invention mechanism, four pole lengths are all made as respectively 55mm, 80mm, 85mm, 90mm, and meet 55+90<80+85, have both existed turn over secondary.The shelf position of San Zhong mechanism arranges difference, and in mill four-bar mechanism, quarter butt is frame, forms double-crank mechanism; In stamping machine four-bar mechanism, the adjacent side of quarter butt is frame, forms crank and rocker mechanism; In sieve four-bar mechanism, stock is frame, forms double rocker mechanism.So far, can show the three types of four-bar linkage and the condition that they form.
4, the position due to mill is provided with slide rail, can change by shift position the length of frame, and form parallelogram by changing the length of other bars, and then show the special circumstances of double-crank mechanism: parallel-crank mechanism and antiparallel-crank mechanism.
5, the function by wheel box realizes and specifically shows fixed shaft gear train, and its effect is too fast at waterwheel rotating speed or crosses when slow and regulate, guarantees that each function of mill can access desired rotating speed.Variator is provided with three groups of gears, and module is 2.0, and the number of teeth is respectively 20,30,40, can provide 1: 2,1: 0.5,1: 1 three kinds of ratio of gear, is respectively used to accelerate, slows down and keeps rotating speed constant.Synchronizer is housed on variator, can realizes simply the conversion between rotating speed by synchronizer.
6, by well anti-dropping apparatus, show ratchet, its main effect is to prevent that in water lift process, bucket falls.What this ratchet device adopted is external ratchet device, and the ratchet number of teeth is 12, and pressure angle is 20 °, can allow anticlockwise rotation, and hinder clockwise rotation, thereby effectively realize the effect that prevents that bucket from falling.
7, by the motion of double rocker mechanism driving link, show cam, a disc cam is installed on sieve place transmission shaft, base radius is 20mm, for promoting push rod, pump, thus the swing of the driving link of promotion double rocking lever.And, when lift reaches maximal value and minimum value, just in time make the swing of the double rocking lever position that reaches capacity, thereby make double rocking lever can normally realize reciprocally swinging.
8, the present invention relies on the functional structure of mill in ancient times, provides a kind of multi-functional mechanical principle to show teaching aid, can be named as " illusion " mill.The present invention, according to this specific background environment of the watermill having characteristic ancient times, uses mechanical knowledge to realize the function of mill, and then shows relevant mechanical knowledge.This teaching aid comprises power system, kinematic train, speed change system, four parts of executive system on the whole, the mechanical principle knowledge of showing comprises four-bar linkage three types double-crank mechanism, crank and rocker mechanism, double rocker mechanism, fixed shaft gear train, ratchet, cam.With existing teaching aid, compare, interest of the present invention is stronger, the better effects if of teaching through lively activities, and teaching efficiency is better; In addition, function of the present invention is abundanter, and more specifically, structure is advantages of simple more for exhibition method.
9, the present invention has taken into full account the feature of mechanical subject, utilizes ancient water mill environment as a setting, in conjunction with the correlation function of mill, shows mechanical relevant knowledge, has really accomplished to teach through lively activities.In addition, feature richness of the present invention, simple and reasonable, can realize complicated mechanical knowledge is simplified, make that abstract theory is specialized, imagery, make uninteresting content interest and appeal, effectively improve the effect of teaching.
Accompanying drawing explanation
Fig. 1 is that the structure of the embodiment of the present invention forms schematic diagram.
Fig. 2 is A place well enlarged diagram in Fig. 1.
Fig. 3 is the enlarged diagram of B place double rocker mechanism in Fig. 1.
Fig. 4 is the cut-open view of the vertical transmission shaft in D place in Fig. 1.
Fig. 5 is the enlarged diagram of C place synchronizer in Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described further.
As Fig. 1～5, the embodiment of the present invention is provided with crank and rocker mechanism, waterwheel 17, base plate 10, waterwheel transmission shaft 18, vertical bevel gear 38, horizontal bevel gear 37, bevel gear shaft 36, belt wheel 15, mill 12, mill base 11, driven crank 13, driving crank 16, double-crank connecting rod 14, double rocker mechanism, baffle plate 5, disc cam 4, camshaft 2, screen tray 6, variator 21, well 26, left support frame 25, right support frame 28, handle 27, ratchet 32, ratchet 31, spring 29, riser 30.
Described double rocker mechanism is provided with drive crank 34, driven rocking bar 33, double rocking lever connecting rod 35; Described variator 21 is provided with top transmission shaft 19, power cam axle 22, power input shaft 23 and gear change hand lever 20; Described crank and rocker mechanism is provided with connecting link 24, follower lever 3, driving lever 1, stamping machine 8, smashes tank 9, bracing frame 7.
Described waterwheel 17 is positioned at base plate 10 right sides, power resources as whole teaching aid, waterwheel transmission shaft 18 one end are connected by pin with waterwheel 17, waterwheel transmission shaft 18 other ends are connected with vertical bevel gear 38, vertically bevel gear 38 meshes with horizontal bevel gear 37, thereby rotation direction is changed into, horizontally rotate, and rotate by bevel gear shaft 36 band movable belt pulleys 15.
Described mill 12 is positioned at base plate 10 upper left corners, mill 12 is arranged on mill base 11 tops, mill 12 tops are provided with driven crank 13, driving crank 16, double-crank connecting rod 14, driving crank 16 is connected on same axis with belt wheel 15, belt wheel 15 drives driving crank 16 motions, and drive double-crank mechanism, thereby mill 12 is normally worked.
Described double rocker mechanism is positioned at base plate 10 lower left corners, and drive crank 34 is provided with baffle plate 5, and baffle plate 5 belows are a disc cam 4, disc cam 4 is fixed on camshaft 2, by camshaft 2, rotate and drive disc cam 4 rotations, thereby drive drive crank 34 motions, drive screen tray 6 to move up and down.
Described crank and rocker mechanism is positioned at variator 21 shell left sides, and driving link 24 is connected with the top transmission shaft 19 of variator 21, and stamping machine 8 is pumped.
Described variator 21 is positioned at base plate 10 lower right corner, top transmission shaft 19, power cam axle 22 are located in gearbox case with power input shaft 23, power cam axle 22 is provided with three groups of gears with power input shaft 23, variator 21 belows are provided with gear change hand lever 20, by gear change hand lever 20, change synchronizer position, thereby change gear combination, realizes speed change.
Described well 26 is positioned at base plate 10 left side central portion, well 26 tops are provided with left support frame 25 and right support frame 28, handle 27 is fixed on left support frame 25 and right support frame 28 by bearing, handle 27 right sides connect ratchet 32, ratchet 32 contacts with ratchet 31, and ratchet 31 is arranged on riser 30, and by spring 29 connection boards 30 and ratchet 27 afterbodys, thereby realize the one-way movement of handle, play Anti-fall effect.
The number of teeth of described three groups of gears can be respectively 20,30,40, and module can be 2.0.
On described variator, synchronizer is housed, can realizes simply the conversion between rotating speed by synchronizer.
The number of teeth of described ratchet can be 12, and pressure angle can be 20 °, can allow anticlockwise rotation, and hinder clockwise rotation, thereby effectively realize the effect that prevents that bucket from falling.
The base radius of described disc cam can be 20mm, for promoting push rod, pumps, thus the swing of the driving link of promotion double rocking lever.
The present invention uses ancient water mill environment displaying as a setting associated mechanical knowledge.Velocity reversal throw-over gear is that the function that horizontal direction is rotated is used bevel-gear sett to realize by vertical direction rotational transform.Double-crank mechanism is realized showing in conjunction with mill function.Described fixed shaft gear train is realized showing in conjunction with gearbox function.Crank and rocker mechanism is realized showing in conjunction with stamping machine function.Double rocker mechanism is realized showing in conjunction with sieve function.Cam is shown in conjunction with the to-and-fro movement of double rocking lever driving link.Ratchet is shown in conjunction with the requirement of well Anti-fall.Teaching aid is split as a plurality of parts and carries out modular design.
Principal feature of the present invention is as follows:
1, the present invention is dexterously by this background environment of ancient water mill, and multiple physical construction is integrated among mill, realizes the displaying of associated mechanical principle.Wherein, double-crank mechanism is realized showing in conjunction with mill function, crank and rocker mechanism is realized showing in conjunction with stamping machine function, double rocker mechanism is realized showing in conjunction with sieve function, fixed shaft gear train is realized showing in conjunction with gearbox function, cam shows in conjunction with the motion of double rocking lever driving link, and ratchet is shown in conjunction with the requirement of well Anti-fall.
2, adopt the theory of modular design, using various piece in feature 1, respectively as a module, whole teaching aid carries out modular design, can be comprised of modules splicing, also can dismantle as required, make teaching aid can reach better use value and teaching efficiency.
3, effectively improve classroom interest, stimulating students ' interests, has reached the effect of teaching through lively activities.
4, strong adaptability, the present invention is Multifunctional demonstration teaching aid, function is very abundant, can adapt to multiple teaching requirement.
5, workable, although the present invention is powerful simple and reasonable, be easy to the practical operation of teacher and student.
6,, by the demonstration of concrete function, reach the teaching purpose of specializing, complexity being simplified abstract.
7, economy of the present invention is strong, is beneficial to and promotes the use of.
Claims (4)
1. multi-functional mechanical principle is shown a teaching aid, it is characterized in that being provided with crank and rocker mechanism, waterwheel, base plate, waterwheel transmission shaft, vertical bevel gear, horizontal bevel gear, bevel gear shaft, belt wheel, mill, mill base, driven crank, driving crank, double-crank connecting rod, double rocker mechanism, baffle plate, disc cam, camshaft, screen tray, variator, well, left support frame, right support frame, handle, ratchet, ratchet, spring, riser;
Described double rocker mechanism is provided with drive crank, driven rocking bar, double rocking lever connecting rod;
Described variator is provided with top transmission shaft, power cam axle, power input shaft and gear change hand lever;
Described crank and rocker mechanism is provided with connecting link, follower lever, driving lever, stamping machine, smashes tank, bracing frame;
Described waterwheel is positioned at base plate right side, power resources as whole teaching aid, waterwheel transmission shaft one end is connected by pin with waterwheel, the waterwheel transmission shaft other end is connected with vertical bevel gear, vertically bevel gear and horizontal bevel gear engagement, thereby rotation direction is changed into, horizontally rotate, and rotate by bevel gear shaft band movable belt pulley;
Described mill is positioned at the base plate upper left corner, mill is arranged on mill base top, mill top is provided with driven crank, driving crank, double-crank connecting rod, driving crank and belt wheel are connected on same axis, belt wheel drives driving crank motion, and drive double-crank mechanism, thereby mill is normally worked;
Described double rocker mechanism is positioned at the base plate lower left corner, and drive crank is provided with baffle plate, and baffle plate below is a disc cam, disc cam is fixed on camshaft, by camshaft, rotate to drive disc cam to rotate, thereby drive drive crank motion, drive screen tray to move up and down;
Described crank and rocker mechanism is positioned at gearbox case left side, and driving link is connected with the top transmission shaft of variator, and stamping machine is pumped;
Described variator is positioned at the base plate lower right corner, top transmission shaft, power cam axle and power input shaft are located in gearbox case, power cam axle and power input shaft are provided with three groups of gears, variator below is provided with gear change hand lever, by gear change hand lever, change synchronizer position, thereby change gear combination, realizes speed change;
Described well is positioned at base plate left side central portion, and well top is provided with left support frame and right support frame, and handle is fixed on left support frame and right support frame by bearing, handle right side connects ratchet, ratchet contacts with ratchet, and ratchet is arranged on riser, and by spring connection board and ratchet afterbody.
2. a kind of multi-functional mechanical principle is shown teaching aid as claimed in claim 1, it is characterized in that the number of teeth of described three groups of gears is respectively 20,30,40, and module is 2.0.
3. a kind of multi-functional mechanical principle is shown teaching aid as claimed in claim 1, and the number of teeth that it is characterized in that described ratchet is 12, and pressure angle is 20 °.
4. a kind of multi-functional mechanical principle is shown teaching aid as claimed in claim 1, and the base radius that it is characterized in that described disc cam is 20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410414421.9A CN104157204B (en) | 2014-08-21 | 2014-08-21 | A kind of multi-functional mechanical principle shows teaching aid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410414421.9A CN104157204B (en) | 2014-08-21 | 2014-08-21 | A kind of multi-functional mechanical principle shows teaching aid |
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| CN104157204A true CN104157204A (en) | 2014-11-19 |
| CN104157204B CN104157204B (en) | 2016-03-02 |
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| CN201410414421.9A Expired - Fee Related CN104157204B (en) | 2014-08-21 | 2014-08-21 | A kind of multi-functional mechanical principle shows teaching aid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652752A (en) * | 2017-03-03 | 2017-05-10 | 西安石油大学 | Laboratory demonstration device for petroleum drilling and recovery machine |
| CN107036843A (en) * | 2017-04-07 | 2017-08-11 | 芜湖航飞科技股份有限公司 | A kind of hydrological observation device based on big-dipper satellite |
| CN108294461A (en) * | 2018-03-13 | 2018-07-20 | 扬州市海星数控制刷设备有限公司 | A kind of double end plant hair device |
| CN110648581A (en) * | 2019-10-17 | 2020-01-03 | 浙江大学城市学院 | Manual type plane cam profile acquisition experiment teaching device and experiment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107036843A (en) * | 2017-04-07 | 2017-08-11 | 芜湖航飞科技股份有限公司 | A kind of hydrological observation device based on big-dipper satellite |
| CN108294461A (en) * | 2018-03-13 | 2018-07-20 | 扬州市海星数控制刷设备有限公司 | A kind of double end plant hair device |
| CN110648581A (en) * | 2019-10-17 | 2020-01-03 | 浙江大学城市学院 | Manual type plane cam profile acquisition experiment teaching device and experiment method |
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| Publication number | Publication date |
|---|---|
| CN104157204B (en) | 2016-03-02 |
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