CN104637390A - Four-bar mechanism demonstration assembly - Google Patents
Four-bar mechanism demonstration assembly Download PDFInfo
- Publication number
- CN104637390A CN104637390A CN201510038385.5A CN201510038385A CN104637390A CN 104637390 A CN104637390 A CN 104637390A CN 201510038385 A CN201510038385 A CN 201510038385A CN 104637390 A CN104637390 A CN 104637390A
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- CN
- China
- Prior art keywords
- gear
- rod member
- gears
- bottom plate
- bar mechanism
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Toys (AREA)
Abstract
The invention discloses a four-bar mechanism demonstration assembly for teaching. The four-bar mechanism demonstration assembly comprises two pairs of engaging gears, a crank, a rocking rod, a connecting rod, a bottom plate and a transparent cover plate, wherein the gears are respectively arranged on the bottom plate, one pair of gears are arranged at the part near the upper edge of the bottom plate, the other pair of gears are arranged at the part near the right edge of the bottom plate, the two pairs of gears are used for respectively driving the crank and the rocking rod, and the crank and the rocking rod are respectively arranged on the gears which are used for driving the crank and the rocking rod, and are moved along with the rotation of the gears. The four-bar mechanism demonstration assembly has the advantages that one part of teeth of one gear of each pair of gears is exposed out of the bottom plate, and can be shifted by a hand; when the different gears are shifted, the crank and the rocking rod are respectively used as prime parts; the transparent cover plate and the bottom plate are connected by a convex part, and are positioned above the gears and rods, so as to write characters and tracks; while a student learns knowledge, the student can operate by hands to verify.
Description
Technical field
The present invention relates to a kind of four-bar mechanism presentation component.
Background technology
Book is the carrier of knowledge, is the requisite companion of Students ' Learning.For the student of mechanical major, at this kind of subject based on schematic diagram of study mechanical principle, often feel gruelling, indigestion, because the figure on book is all that simple two dimension is static, student often needs to go to understand according to the imagination of oneself, but for mechanism uncommon in some daily lifes, in understanding, difficulty is just very large.Teacher is when upper this kind of course, simple explanation often can not be dealt with problems, class can be made on the contrary to become uninteresting, their common way puts some ppt animations to assist understanding, but be confined to see, listen, the participation of student is low, enthusiasm is poor, but also easily allows people produce dependence to electronic product.
There is the three-dimensional book for learning front initiation in the market, being that paper folding is glued in book, mixing some pictures aside, totally merge relatively good.But just can not continue to have moved again after opening.This book obviously can not be used for rote teaching.
Summary of the invention
In order to overcome the existing shortcoming that the understanding difficulty that exists is large when learning mechanical principle, ppt teaching is directly perceived not, students' participation is low etc., the invention provides and a kind ofly can solve common book and can not represent the drawback of dynamic effect, ppt can be improved again and to impart knowledge to students the participation be short of and a kind of four-bar mechanism presentation component be convenient for carrying.
The technical solution used in the present invention is: a kind of four-bar mechanism presentation component, comprise base plate, the first gear, the second gear, the 3rd gear, the 4th gear, the first rod member, the second rod member, the 3rd rod member, the 4th rod member, coupling shaft and with the transparent cover plate of base plate same shape size, four projections; Transparent cover plate is arranged on base plate by four projections, and described first gear, the second gear, the 3rd gear, the 4th gear are installed on base plate, and between base plate and transparent cover plate; Wherein, the edge of the first gear and the 4th gear all exceeds the edge of base plate and transparent cover plate; The ratio of the number of teeth of the first gear, the second gear, the 3rd gear, the 4th gear is: 1:4:2:2; The length L8 of the length L6 of the first rod member, the length L7 of the second rod member, the 3rd rod member, the length L9 of the 4th rod member meet L6+L9 < L7+L8; Described first gear and the second gears meshing, the 3rd gear and the 4th gears meshing; Described second gear is fixed with the first rod member, and the first rod member is along with the second pinion rotation; 3rd gear is fixed with the 3rd rod member, the 3rd rod member is along with the 3rd pinion rotation; The end of the first rod member and the 3rd rod member is hinged respectively at the two ends of the second rod member, and the two ends of the 4th rod member are separately fixed on the center of circle of the second gear, the 3rd gear.
Benefit of the present invention is: when stirring left margin gear, and four bars there will be dieback phenomenon, namely runs at " dead point ", and when stirring upper edge gear, quickreturn characteristics phenomenon appears in four bars.Like this while learning knowledge, operation of can taking action on one's own, is put into practice.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is the integrally-built side schematic view of the present invention;
In figure, base plate 1, first gear 2, second gear 3, the 3rd gear 4, the 4th gear 5, first rod member 6, second rod member 7, the 3rd rod member 8, the 4th rod member 9, transparent cover plate 10, protruding 11.
Embodiment
As shown in Figure 1, a kind of four-bar mechanism presentation component, comprise base plate 1, first gear 2, second gear 3, the 3rd gear 4, the 4th gear 5, first rod member 6, second rod member 7, the 3rd rod member 8, the 4th rod member 9, coupling shaft and transparent cover plate 10, four projections 11 with base plate 1 same shape size; Transparent cover plate 10 is arranged on base plate 1 by four projections 11, described first gear 2, second gear 3, the 3rd gear 4, the 4th gear 5 are installed on base plate 1, and between base plate 1 and transparent cover plate 10, by the motion state of transparent cover plate 10 energy clear view four-bar mechanism, and the movement locus of energy real time record four-bar mechanism.The edge conveniently stirring the first gear 2 and the 4th gear 5, first gear 2 and the 4th gear 5 all exceeds the edge of base plate 1 and transparent cover plate 10; The ratio of the number of teeth of the first gear 2, second gear 3, the 3rd gear 4, the 4th gear 5 is: 1:4:2:2; The length sum of most quarter butt and most stock that the length L6 of the first rod member 6, the length L7 of the second rod member 7, the length L8 of the 3rd rod member 8, the length L9 of the 4th rod member 9 meet L6+L9 < L7+L8(four-bar linkage is less than or equal to other two pole length sums); Described first gear 2 engages with the second gear 3, and the 3rd gear 4 engages with the 4th gear 5; Described second gear 3 being fixed with the first rod member 6, first rod member 6 along with the second gear 3 rotates; 3rd gear 4 being fixed with the 3rd rod member the 8, three rod member 8 along with the 3rd gear 4 rotates; The end of the first rod member 6 and the 3rd rod member 8 is hinged respectively at the two ends of the second rod member 7, and the two ends of the 4th rod member 9 are separately fixed on the center of circle of the second gear 3, the 3rd gear 4.
Above-mentioned four-bar mechanism presentation component can demonstrate the dieback phenomenon of crank rocker and anxious bow tie, specific as follows:
Dieback phenomenon is demonstrated: stir the first gear 2, first gear 2 drives the second gear 3 to rotate, make to be fixed on the first rod member 6 on the second gear 3 to rotate, first rod member 6 drives the rotation of the 3rd gear 4 by the second rod member 7 and the 3rd rod member 8, until when the second rod member 7 and the 3rd rod member 8 are positioned at same straight line, there is dieback phenomenon.
Quickreturn characteristics phenomenon is demonstrated: stir the 4th gear 5,4th gear 5 drives the 3rd gear 4 to rotate, make to be fixed on the 3rd rod member 8 on the 3rd gear 4 to rotate, 3rd rod member 8 drives the rotation of the second gear 3 by the second rod member 7 and the first rod member 6, make the 3rd rod member uniform rotation, can find that the average velocity of the first rod member backlash stroke is but greater than the average velocity of impulse stroke, be quickreturn characteristics phenomenon.
In crank and rocker mechanism, though crank does constant velocity rotation, and the average velocity of rocking bar swing space-time reversion journey is greater than the average velocity of impulse stroke, and this character is called the quickreturn characteristics principle of mechanism.
Claims (1)
1. a four-bar mechanism presentation component, it is characterized in that, comprise base plate (1), the first gear (2), the second gear (3), the 3rd gear (4), the 4th gear (5), the first rod member (6), the second rod member (7), the 3rd rod member (8), the 4th rod member (9), coupling shaft and with the transparent cover plate (10) of base plate (1) same shape size, four projections (11); Transparent cover plate (10) is arranged on base plate (1) by four projections (11), described first gear (2), the second gear (3), the 3rd gear (4), the 4th gear (5) are installed on base plate (1), and are positioned between base plate (1) and transparent cover plate (10); Wherein, the edge of the first gear (2) and the 4th gear (5) all exceeds the edge of base plate (1) and transparent cover plate (10); The ratio of the number of teeth of the first gear (2), the second gear (3), the 3rd gear (4), the 4th gear (5) is: 1:4:2:2; The length L8 of the length L6 of the first rod member (6), the length L7 of the second rod member (7), the 3rd rod member (8), the length L9 of the 4th rod member (9) meet L6+L9 < L7+L8; Described first gear (2) is engaged with the second gear (3), and the 3rd gear (4) engages with the 4th gear (5); Described second gear (3) is fixed with the first rod member (6), and the first rod member (6) is along with the second gear (3) rotation; 3rd gear (4) is fixed with the 3rd rod member (8), the 3rd rod member (8) rotates along with the 3rd gear (4); The end of the first rod member (6) and the 3rd rod member (8) is hinged respectively at the two ends of the second rod member (7), and the two ends of the 4th rod member (9) are separately fixed on the center of circle of the second gear (3), the 3rd gear (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038385.5A CN104637390A (en) | 2015-01-27 | 2015-01-27 | Four-bar mechanism demonstration assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038385.5A CN104637390A (en) | 2015-01-27 | 2015-01-27 | Four-bar mechanism demonstration assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104637390A true CN104637390A (en) | 2015-05-20 |
Family
ID=53216082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510038385.5A Pending CN104637390A (en) | 2015-01-27 | 2015-01-27 | Four-bar mechanism demonstration assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104637390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761961A (en) * | 2020-06-05 | 2020-10-13 | 上海工程技术大学 | Novel three-dimensional book based on combination of paper folding process and additive manufacturing technology |
-
2015
- 2015-01-27 CN CN201510038385.5A patent/CN104637390A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 平面铰链四杆与圆柱齿轮副组合机构类型及输出运动初探: ""平面铰链四杆与圆柱齿轮副组合机构类型及输出运动初探"", 《北方轻工学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761961A (en) * | 2020-06-05 | 2020-10-13 | 上海工程技术大学 | Novel three-dimensional book based on combination of paper folding process and additive manufacturing technology |
| CN111761961B (en) * | 2020-06-05 | 2021-06-11 | 上海工程技术大学 | Novel three-dimensional book based on combination of paper folding process and additive manufacturing technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
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| WD01 | Invention patent application deemed withdrawn after publication |