CN103578343A - Comprehensive multi-rod mechanism teaching demonstration platform - Google Patents
Comprehensive multi-rod mechanism teaching demonstration platform Download PDFInfo
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- CN103578343A CN103578343A CN201310501665.6A CN201310501665A CN103578343A CN 103578343 A CN103578343 A CN 103578343A CN 201310501665 A CN201310501665 A CN 201310501665A CN 103578343 A CN103578343 A CN 103578343A
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Abstract
The invention discloses a comprehensive multi-rod mechanism teaching demonstration platform. The comprehensive multi-rod mechanism teaching demonstration platform has the advantages of being strong in universality, small in structural size, flexible to splice and the like and mainly comprises a teaching demonstration board and five different-length rods. The demonstration board is composed of four demonstration regions, hinge points are fixedly arrayed on the demonstration board at 50mm*40mm intervals, and accordingly three or four mechanisms can be simultaneously demonstrated. Movable components mainly comprise five different-length components and three moving pairs and can be freely combined to form more than thirty kinds of normal mechanisms. The comprehensive multi-rod mechanism teaching demonstration platform can demonstrate properties of a four-rod mechanism, evolution processes of a multi-rod mechanism and normal mechanisms like conveyors, gear shapers, pressing machines, slotting machines, shaping machines and six-rod toggle levers, can carry out rod set disassembling and splicing experiments, can achieve automatic motion of the mechanisms after being provided with a small-sized motor and a transmission, and can be used for student mechanism splicing innovation experiments. The comprehensive multi-rod mechanism teaching demonstration platform makes abstract teaching content concrete, changes cramming methods of teaching in the former theory teaching process, and improves manipulative ability of students.
Description
Technical field
The present invention relates to mechanical subject theory of mechanisms technical field, exactly it is the comprehensive teaching platform of a kind of multi-bar linkage.
background technology
Mechanical principle is a special kind of skill basic course in mechanical each specialty (undergraduate course) teaching programme, play from basic course excessively to specialized course, from theoretical property course excessively to the effect of taking over from the past and setting a new course for the future with the actual combination of engineering, be one of trunk class in series of machine course and degree class.In all kinds of engineering goods of INTRODUCTION OF THE COURSE STRUCTURE, ABC, basic theories and the basic skills of common mechanism design, cultivate emphatically creative ability for students, mechanical system scheme designed capacity.Change in the past the "Duck-stuffing" type of teaching in theory teaching process, the Patterns in Teaching that adopt heuristic, problem formula, autonomous learning, initiatively participates in, actively discusses, encourage student to think more, see more and hear often, ask more, do more, become numerous educators' common recognition.
Planar linkage mechanism is one of body matter of theory of mechanisms research, and main contents comprise: the fundamental property of four-bar linkage, planar linkage mechanism evolution and motion analysis and comprehensive.Wherein, it is the soul of planar linkage mechanism that the fundamental property of four-bar linkage and linkage assembly develop, and only has thoroughly and understands, expertly grasps, and could provide favourable help for study and the production practices of follow-up specialized course.Therefore this part is the emphasis of this chapter.Wherein such as the knowledge points such as evolution of Grashof's criterion, linkage assembly, usually need student to there is certain Fundamentals of Mathematics and space imagining ability, this is for the student of foundation is weak, all some is had too many difficulties to cope with to analyze, understand, conclude summary, so this part of Students ' Learning has certain difficulty.
The multimedia education producing along with computer technology, is to traditional teaching pattern, the challenge of teaching method, also to educational reform, has brought opportunity, both, for student classroom has increased teaching resource, has expanded teaching means, has enriched again class teaching content.Mechanical principle course has been introduced the theory and design method of various common mechanisms, in conjunction with multimedia courseware, can show the application in productive life of various mechanism kinematic forms and this mechanism, the distance of the theory and practice that furthers vividly.But although multimedia technology has been brought facility to education and instruction, can not abuse, otherwise can have a negative impact such as, multimedia is dominated teaching, from the beginning teacher reads tail according to courseware, ignores the reaction of student on classroom, lacks specific aim and dirigibility; Multimedia teaching teaching speed is fast, and content is too much, absonant with student thought rhythm, the understanding of impact to knowledge.
Mechanical principle is a course that practicality is very strong, and Link of Practice Teaching is very important, can not only make student that knowwhy is converted into application expertise, can also strengthen Engineering Awareness, improves manipulative ability and cultivates creative thinking ability.Classroom instruction and practical teaching are the Liang Ge branch of this Teaching, on a par.In order to strengthen the cultivation of innovative consciousness of students and the ability of practice, must strengthen Link of Practice Teaching.Creative thinking and to put into practice manipulative ability be that student moves towards the basis that society succeeds, manipulative ability is exactly the comprehensive of knowledge thinking and practice.Practical teaching link need to launch by certain means and equipment, and the detailed process organizational form of education activities and teaching efficiency are all relevant with the equipment tool of using in education activities.
In mechanical course teaching, in order to demonstrate different forms, simple structure and the movement mechanism of various mechanical motions, for the convenience of studying, usually need some real experiment platforms, certain specific motion model is specialized, though in existing laboratory existing experiment porch platform can realize this object carry out mechanism demonstration bulky because of it, extremely heavy, be inconvenient to carry and cannot climb up daily classroom and carry out teaching demonstration.
Summary of the invention
Object of the present invention is exactly to solve the problem and shortage that existing test platform exists, and is simplified and is innovated, be presented in classmates in face of, strengthen sense organ impression personal understanding, deepen knowledge point to dissect and understanding.Provide a kind of flexible for installation, be easy to dismounting, be convenient to mobile, applicable classroom instruction, the reliable and stable comprehensive teaching platform of multi-bar linkage.
Wood of the present invention be to realize like this, the comprehensive teaching platform of a kind of multi-bar linkage comprises main demo and basic rod member, it is characterized in that: main demo is provided with four demonstration districts, in every demonstration district, be provided with hinge point, mounting nuts in hinge point, basic rod member is provided with pan, and basic rod member comprises the rod member of five kinds of length; Four kinds of basic rod members the shortest in five kinds of basic rod member length do not meet the shortest basic rod member and the longest basic rod member sum, be less than all the other two basic rod member sums, four kinds of the longest basic rod members meet the shortest basic rod member and are less than all the other two basic rod member sums with the longest basic rod member sum; Demo meets with basic rod member elongate member: basic rod member long 0.5 times or integral multiple for fixed hinge point on demonstration board, meet and take the interchangeability requirement of different component during as frame.
Advantage of the present invention is, convenient, flexible, can be used for demonstrating the character of four-bar mechanism: condition, quick return characteristic, dead-centre position that crank exists.The evolutionary process of demonstration multi-bar linkage: crank and rocker mechanism, double-crank mechanism, double rocker mechanism, sliding guide mechanism, oscillating guidebar mechanism, turning-block linkage that conversion principal and subordinate moving part is realized; Slider-crank mechanism, sine mechanism, tangent mechanism that conversion kinematic pair form and size realize; The eccentric mechanism of conversion kinematic pair size.The common mechanisms such as demonstration conveyor, gear shaping, press, slotting machine, transverse planing machine, six bar toggle links; Can carry out the fractionation and splicing experiment of bar group.Demonstration cam mechanism: translation cam, swing cam.
Accompanying drawing explanation
Fig. 1 is arrangement of boring holes figure of the present invention.
Fig. 2 is five kinds of basic rod members of the present invention.
Fig. 3 is the citation form of four-bar mechanism of the present invention.
Fig. 4 is that mechanism's conversion that different component is that frame realizes is take in the present invention.
Fig. 5 is that the present invention changes Components Shape and size realizes mechanism alternation.
Fig. 6 is that the present invention changes kinematic pair size and realizes mechanism alternation.
Fig. 7 is four kinds of common mechanisms of the present invention.
Fig. 8 is two kinds of common mechanisms of the present invention and cam mechanism.
Embodiment
embodiment 1:
Demonstration board of the present invention is comprised of the demonstration district of four 250mm * 138mm, the hinge point that on it, stationary arrangement spacing is 50mm * 40mm, the round nut of installation M5 in hinge point, fixing and being connected for rod member hinge point.Basic rod member of the present invention comprises that both sides hinge point spacing is respectively the rod member of five kinds of length of 25mm, 50mm, 80mm, 150mm, 160mm, and derivative rod member: the eccentric wheel that the curvilinear guide that curvature is 80mm and offset or dish are 50mm.Five kinds of bar length are subject to the constraint of the pacing items that crank exists, the four-bar mechanism wherein being formed by 25mm, 50mm, 80mm, 150mm, and quarter butt and stock sum are greater than all the other two bars; The four-bar mechanism being comprised of 50mm, 80mm, 150mm, 160 mm, quarter butt is less than all the other two bar sums with stock sum.The bar of 50mm and 150mm is directly proportional to the spacing of main demo 50mm; The rod member of 80mm and 160mm is directly proportional to the spacing of main demo 40mm, has guaranteed to take interchangeability when different component is as frame.When forming four-bar mechanism with 25mm, 50mm, 80mm, 150mm, there is not crank; While there is crank with 50mm, 80mm, 150mm, 160 mm composition four-bar mechanisms, demonstrated the condition that crank exists.
embodiment 2:
Shown in Fig. 3, the four-bar mechanism forming with 50mm, 80mm, 150mm, 160 mm, take respectively 80mm bar as frame, is double rocker mechanism (curvilinear guide); Take 50mm bar as frame, is double-crank mechanism (top right plot); Take 50mm bar as side link, is slider-crank mechanism (lower-left figure).So demonstrated the citation form of four-bar mechanism.
embodiment 3:
Shown in Fig. 4, slider-crank mechanism (the picture left above), take respectively different component as frame, is converted to turning-block linkage (top right plot), oscillating guidebar mechanism (lower-left figure) and he Moving Leader Mechanism (bottom-right graph).
embodiment 3:
Shown in Fig. 5,80mm bar is replaced with the curvilinear guide of iso-curvature, crank and rocker mechanism becomes curve crank slide block mechanism (the picture left above); When curvature is infinitely great, become slider-crank mechanism (top right plot); Same variation can be converted to respectively curve sine mechanism (lower-left figure) and sine mechanism (bottom-right graph).Thereby demonstration is changed by changing the mechanism of Components Shape and size realization.
embodiment 4:
Fig. 6 left side illustrates, and slider-crank mechanism, by expanding revolute pair radius, becomes 50mm bar the eccentric wheel of 50mm, forms eccentric mechanism (middle figure); By expanding moving sets size, be converted to built-in eccentric mechanism (right figure).
embodiment 5:
Fig. 7 has demonstrated the multi-bar linkage consisting of different component, is followed successively by: stack pallet mechanism (the picture left above), slotting machine (top right plot), press (lower-left figure), gear shaping (bottom-right graph).
embodiment 5:
The multi-bar linkage that Fig. 8 demonstration consists of different component, is followed successively by: six bar elbow-bar mechanism (the picture left above), transverse planing machine (top right plot).And two kinds of cam mechanisms: swing cam mechanism (lower-left figure) and translating cam mechanism (bottom-right graph).
Demo and various rod member, all scribed by laser engraving machine by Ya Geli plate as mentioned above.Wherein demonstration board adopts white, and driving link adopts yellow, and driven member adopts red, and fixed frame adopts black.Make this teaching platform there is feature light, flexible, attractive in appearance.
Claims (6)
1. the comprehensive teaching platform of multi-bar linkage, it comprises, main demo and basic rod member, is characterized in that: on main demo, arrange the hinge point of constant spacing, basic rod member is provided with pan.
2. according to the comprehensive teaching platform of a kind of multi-bar linkage described in claim, it is characterized in that: main demo is provided with four demonstration districts.
3. according to the comprehensive teaching platform of a kind of multi-bar linkage described in claim, it is characterized in that: in the hinge point on main demo, nut is housed.
4. according to the comprehensive teaching platform of a kind of multi-bar linkage described in claim, it is characterized in that: the length of basic rod member has five kinds.
5. according to the comprehensive teaching platform of a kind of multi-bar linkage described in claim, it is characterized in that: four kinds of basic rod members the shortest in five kinds of basic rod member length do not meet the shortest basic rod member and the longest basic rod member sum, be less than all the other two basic rod member sums, four kinds of the longest basic rod members meet the shortest basic rod member and are less than all the other two basic rod member sums with the longest basic rod member sum.
6. according to the comprehensive teaching platform of a kind of multi-bar linkage described in claim, it is characterized in that: basic rod member long 0.5 times or integral multiple for fixed hinge point on demonstration board, meet and take the interchangeability requirement of different component during as frame.
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| CN201310501665.6A CN103578343A (en) | 2013-10-23 | 2013-10-23 | Comprehensive multi-rod mechanism teaching demonstration platform |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871311A (en) * | 2014-03-15 | 2014-06-18 | 金华职业技术学院 | Parabolic demonstration teaching aid |
| CN103943022A (en) * | 2014-05-09 | 2014-07-23 | 中国地质大学（武汉） | Combined teaching aid for simulating reversal |
| CN103985304A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Folding type six-rod mechanism |
| CN104021719A (en) * | 2014-05-12 | 2014-09-03 | 南昌大学 | Planar linkage mechanism combined teaching aid |
| CN104036684A (en) * | 2014-05-22 | 2014-09-10 | 杭州电子科技大学 | Typical transmission mechanism comprehensive demonstration teaching aid |
| CN104167144A (en) * | 2014-04-22 | 2014-11-26 | 雷康 | Mechanical tower demonstration mechanism |
| CN104240581A (en) * | 2014-05-08 | 2014-12-24 | 韶关学院 | Bar mechanism teaching model |
| CN104332097A (en) * | 2014-09-29 | 2015-02-04 | 桂林航天工业学院 | Two-sided teaching appliance |
| CN104504989A (en) * | 2014-12-31 | 2015-04-08 | 天津大学 | Typical mechanism motion analysis modular teaching device |
| CN104575231A (en) * | 2014-12-19 | 2015-04-29 | 福建工程学院 | Mechanism freedom degree calculating and analyzing teaching tool |
| CN104599576A (en) * | 2014-07-05 | 2015-05-06 | 黄建明 | Four-bar mechanism teaching tool for mechanical motion principle teaching |
| CN105390051A (en) * | 2015-11-16 | 2016-03-09 | 浙江工业大学之江学院 | Portable assembled theoretical mechanics teaching aid |
| CN105788436A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal plane linkage combined type teaching aid |
| CN105788437A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal plane mechanism combined type teaching aid |
| CN105788435A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal crank guide rod slide block mechanism combined type teaching aid |
| CN106157793A (en) * | 2016-08-30 | 2016-11-23 | 合肥磐石自动化科技有限公司 | A kind of separate type many rod members combined demonstration device |
| CN108269485A (en) * | 2018-01-17 | 2018-07-10 | 吴文英 | A kind of machinery course link transmission apparatus for demonstrating |
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| KR20110132016A (en) * | 2010-06-01 | 2011-12-07 | 한국원자력연구원 | Disk-type periodic wave control instrument |
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Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871311A (en) * | 2014-03-15 | 2014-06-18 | 金华职业技术学院 | Parabolic demonstration teaching aid |
| CN104167144A (en) * | 2014-04-22 | 2014-11-26 | 雷康 | Mechanical tower demonstration mechanism |
| CN104167144B (en) * | 2014-04-22 | 2019-04-23 | 新昌县澄潭镇艺林机械厂 | Mechanical tower demonstrates mechanism |
| CN104240581B (en) * | 2014-05-08 | 2016-08-17 | 韶关学院 | A kind of linkage teaching mode |
| CN104240581A (en) * | 2014-05-08 | 2014-12-24 | 韶关学院 | Bar mechanism teaching model |
| CN103943022A (en) * | 2014-05-09 | 2014-07-23 | 中国地质大学（武汉） | Combined teaching aid for simulating reversal |
| CN103943022B (en) * | 2014-05-09 | 2016-01-06 | 中国地质大学（武汉） | A kind of combined appliance for teaching for simulating reversal process |
| CN104021719A (en) * | 2014-05-12 | 2014-09-03 | 南昌大学 | Planar linkage mechanism combined teaching aid |
| CN104021719B (en) * | 2014-05-12 | 2016-04-13 | 南昌大学 | A kind of planar linkage mechanism combined teaching aid |
| CN103985304A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Folding type six-rod mechanism |
| CN104036684A (en) * | 2014-05-22 | 2014-09-10 | 杭州电子科技大学 | Typical transmission mechanism comprehensive demonstration teaching aid |
| CN104036684B (en) * | 2014-05-22 | 2016-04-06 | 杭州电子科技大学 | A kind of gear train overview display teaching aid |
| CN104599576A (en) * | 2014-07-05 | 2015-05-06 | 黄建明 | Four-bar mechanism teaching tool for mechanical motion principle teaching |
| CN104599576B (en) * | 2014-07-05 | 2017-06-20 | 黄建明 | A kind of four-bar mechanism teaching aid for mechanical movement theory teaching |
| CN104332097A (en) * | 2014-09-29 | 2015-02-04 | 桂林航天工业学院 | Two-sided teaching appliance |
| CN104332097B (en) * | 2014-09-29 | 2017-03-15 | 桂林航天工业学院 | A kind of two-sided teaching aid |
| CN104575231A (en) * | 2014-12-19 | 2015-04-29 | 福建工程学院 | Mechanism freedom degree calculating and analyzing teaching tool |
| CN104504989B (en) * | 2014-12-31 | 2017-06-06 | 天津大学 | A kind of typical mechanism mechanism module instructional device |
| CN104504989A (en) * | 2014-12-31 | 2015-04-08 | 天津大学 | Typical mechanism motion analysis modular teaching device |
| CN105390051A (en) * | 2015-11-16 | 2016-03-09 | 浙江工业大学之江学院 | Portable assembled theoretical mechanics teaching aid |
| CN105390051B (en) * | 2015-11-16 | 2017-10-03 | 浙江工业大学之江学院 | Portable assembly rational mechanics teaching aid |
| CN105788435A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal crank guide rod slide block mechanism combined type teaching aid |
| CN105788437A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal plane mechanism combined type teaching aid |
| CN105788436A (en) * | 2016-02-16 | 2016-07-20 | 南昌大学 | Horizontal plane linkage combined type teaching aid |
| CN106157793A (en) * | 2016-08-30 | 2016-11-23 | 合肥磐石自动化科技有限公司 | A kind of separate type many rod members combined demonstration device |
| CN106157793B (en) * | 2016-08-30 | 2022-07-22 | 合肥磐石智能科技股份有限公司 | Separated multi-rod combined demonstration device |
| CN108269485A (en) * | 2018-01-17 | 2018-07-10 | 吴文英 | A kind of machinery course link transmission apparatus for demonstrating |
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Application publication date: 20140212 |