CN105788436A - Horizontal plane linkage combined type teaching aid - Google Patents
Horizontal plane linkage combined type teaching aid Download PDFInfo
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- CN105788436A CN105788436A CN201610086162.0A CN201610086162A CN105788436A CN 105788436 A CN105788436 A CN 105788436A CN 201610086162 A CN201610086162 A CN 201610086162A CN 105788436 A CN105788436 A CN 105788436A
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- driven shaft
- teaching aid
- gear
- connecting rod
- horizontal plane
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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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- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Transmission Devices (AREA)
Abstract
Disclosed is a horizontal plane linkage combined type teaching aid. The teaching aid comprises a frame portion, a motion portion, a power portion and a velocity measurement portion. The frame portion comprises a frame, a driven shaft crossbeam and a containing box; the motion portion comprises a connecting rod assembly, a connecting shaft and a shaft support universal ball; the power portion comprises a motor, small pulleys, a synchronous belt, a large pulley, pulley shafts, and an input control module in an electric cabinet; and the velocity measurement portion comprises an angular displacement sensor, a small pulley, a driven shaft seat assembly, and a speed acquisition module in the electric cabinet, wherein the driven shaft seat unit also comprises a driven shaft seat, three transmission gears and an angular displacement sensor. According to the invention, through splicing of each portion, movement demonstration of multiple plane linkages is realized, and the problems of realizing design, movement demonstration and feature research of the different plane linkages on the same teaching aid and the like are well solved. Demonstration of some basic plane four-connecting-rod mechanisms such as crank rocking bars, double cranks, double rocking bars and the like can be carried out, different mechanisms can also be formed through changing the length of connecting rods or free combination, knowledge point reproduction of multiple mechanical principle plane linkages is realized, and the teaching effect can be effectively improved.
Description
Technical field
The present invention relates to a kind of mechanical teaching aid, particularly relate to a kind of horizontal plane linkage combination type teaching aid.
Background technology
Theory of mechanics class is mechanical speciality technical foundation course, and task is the rudimentary knowledge allowing student understand about common mechanism and common part aspect, then the somewhat complex design of learning organization aspect calculates.Understanding part and mechanism are important steps, the explanation that student passes through teacher how is allowed to grasp complicated abstract mechanical motion principle rapidly, teaching aid is good selection, and the use of mechanical teaching aid is greatly accelerated the process that student understands and grasps classroom knowledge, and application prospect is extensive.
Planar linkage mechanism component forms of motion is various, such as compound movements such as rotating, swing, be mobile.Intuitive is one of main principle of instruction, student needs to grasp better based on perceptual knowledge or experience book knowledge, especially the mechanical knowledge of crank and rocker mechanism, double-crank mechanism, double rocker mechanism, planar linkage overlaying mechanism, planar linkage passive constraint mechanism, utilize explanation and the mode drawn completely they can not be illustrated and understand if simple, which not only adds the teaching load of teacher, and affect student learning effect.
There are similar products currently on the market, but its function is comparatively single, and parameter is all nonadjustable, the demonstration of the single mechanism that can only carry out, and also each teaching aid needs individually to be equipped with an electric cabinet, and cost-effective rate is low.Also has the teaching aid of some mechanical innovative experiments, student oneself is needed to assemble, because the reason of design aspect, in motor process, pressure angle and frictional force are all relatively larger, it is impossible to realize motion, more do not have automatically controlled and kinematic parameter output also without power source, owing to each parts disperse very much, efficiency is low is one, and can build in experimental period is all successfully a big problem, does not more talk and realizes motion.
Summary of the invention
The technical problem to be solved is to overcome the simple efficiency of the function of existing teaching tool for plane connecting rod mechanism on market low, dismounting is used to preserve inconvenience, the deficiencies such as poor stability and life-span are long, a kind of horizontal plane linkage combination type teaching aid is provided, realizing crank rocker, double-crank, while the demonstration of some substantially planar quadric chains such as double rocking lever, different mechanisms can also be freely formed, length of connecting rod parameter can also be changed and carry out multiple connecting rod experiment, the conversion flexible efficiency of simple operations is greatly improved, owing to axle supports the supporting role of multi-directional ball, effectively prevent the existence of cantilever beam, reduce material requirements and the processing request of rod member and axial workpiece, thus reducing cost, enhance mechanical stability, increase mechanism's whole service life.
Horizontal plane linkage combination type teaching aid of the present invention includes rack section, motion parts, power section and the part that tests the speed.Rack section includes frame, driven shaft crossbeam and containing box；Motion parts includes link assembly, connects axle and axle support multi-directional ball；Power section includes the input control part in motor, main shaft, Timing Belt assembly and electric cabinet；The part that tests the speed includes the speed acquisition part in angular displacement sensor, driven shaft holder assembly and electric cabinet.
The integrated component of described frame, structure relative complex, adopt welding manner splicing.Based on working panel, at four welded corner joint columns as a spike；Under working panel, 6 panels reinforcement plates are indulged with crossing main spindle's welding three horizontal three in working panel four limit；The mounting structure of main shaft, motor shaft and angular displacement sensor axle these three axle and the drawer type crossbeam of three support containing boxs is also welded below panel；By the mode of four spikes of welding on the right side of working panel, weld driven shaft beam guideway；On a spike in the lower right corner, welding driven shaft holder assembly deposits beam.
Described link assembly includes bar in connecting rod, the outer bar of connecting rod, butterfly ellipse pin and two deep groove ball bearings (or a deep groove ball bearing adds the retainer ring of a class bearing).The affixed deep groove ball bearing in one end of bar in connecting rod (interference fit or in addition with welding), the other end inserts in the outer bar of connecting rod, re-uses butterfly ellipse pin and axially fastens, the affixed deep groove ball bearing of the other end of the outer bar of connecting rod or the retainer ring of class bearing.
Described Timing Belt assembly includes a big belt wheel, two small pulleys, three belt shafts, six deep groove ball bearings, Timing Belt and Timing Belt hold-down mechanism.Consolidating a belt wheel on belt shaft, two ends are each affixed deep groove ball bearing again, and is arranged in frame by these parts, is coupled together by belt wheel again through Timing Belt, is finally compressed by Timing Belt with rack-mounted Timing Belt hold-down mechanism.
Described driven shaft holder assembly includes the gear (gear III) on driven axle bed, two thumbscrews, driven shaft, two deep groove ball bearings, spring fastener, driven shaft gear (gear I), increment idle pulley (gear II), angular displacement sensors, angular displacement sensor.Driven shaft installs two deep groove ball bearings, then it is placed in driven axle bed, spring fastener is installed again and prevents its axial runout, another side established angle displacement transducer at driven axle bed, it axially stretches out driven axle bed, gear I and gear III are packed on driven shaft and angular displacement sensor axle, again gear II is arranged on driven axle bed in the middle of two other gear, connecting two other gear, the driven axle bed after assembling is fixed on driven shaft crossbeam by two thumbscrews or driven shaft holder assembly is deposited on beam.
Described electric cabinet includes the containing box (containing box I) in motor driver, data processor (A/D module, PWM module, bluetooth module) and the frame lower right corner.Each physical arrangement dispersion of motor driver and data processor is fixed in containing box I, and perforate fills power interface on containing box I right side wall, and last containing box is placed under the working panel of the frame lower right corner with drawer structure.
Beneficial effects of the present invention: realizing crank rocker, double-crank, while the demonstration of some substantially planar quadric chains such as double rocking lever, different mechanisms can also be freely formed, length of connecting rod parameter can also be changed and carry out multiple connecting rod experiment, the conversion flexible efficiency of simple operations is greatly improved, owing to axle supports the supporting role of multi-directional ball, effectively prevent the existence of cantilever beam, reduce material requirements and the processing request of rod member and axial workpiece, thus reducing cost, enhance mechanical stability, increase mechanism's whole service life, generally rectangular structure, electric-controlled parts is all placed in containing box I, each parts and a small amount of little maintenance tool also all can be put in containing box II and containing box III, so that encapsulation and storage transport.Generally speaking having the advantage that material, low cost of manufacture, it is simple to encapsulation, store convenient transportation, mechanism's demonstration kind is many, and parts repeat usage in each mechanism is high, easy disassembly, good stability, long service life.
Accompanying drawing explanation
Fig. 1 is the polycrystalline substance schematic diagram of horizontal plane linkage combination type teaching aid；
Fig. 2 a is crank and rocker mechanism play configuration schematic diagram (top view) of horizontal plane linkage combination type teaching aid；
Fig. 2 b is crank and rocker mechanism play configuration schematic diagram (front view) of horizontal plane linkage combination type teaching aid；
Fig. 3 is the link assembly structural representation of horizontal plane linkage combination type teaching aid.
In above-mentioned figure: 1-small band wheel shaft I；2-small pulley I；3-small band wheel shaft II；4-small pulley II；5-Timing Belt assembly；The big belt wheel of 6-；7-straight pin；8-pressure strip；9-holddown spring；10-nut；11-compresses wheel shaft；12-Timing Belt contact roller；13-containing box II；14-containing box I；15-containing box III；16-frame；17-main shaft；The driven lever shaft crosstie of 18-；19-angular displacement sensor I；20-motor；21-connecting rod II (length range: 100mm-160mm)；22-connecting rod III (length range: 100mm-160mm)；23-connecting rod IV (length range: 160mm-250mm)；24-driven shaft；25-gear I；The driven axle bed I of 26-；The driven axle bed II of 27-；28-gear II；29-angular displacement sensor gear shaft；30-gear III；31-angular displacement sensor II；32-follows closely shape wire column；33-connects axle；34-axle supports multi-directional ball；The outer bar of 35-connecting rod；36-butterfly ellipse pin；Bar in 37-connecting rod.
Specific embodiments
In order to make it easy to understand, below in conjunction with preferred implementation and coordinate accompanying drawing to be described in detail.
The common structure of several mechanisms demonstration of the present invention is first described: as shown in Figure 1, 2, is first, to frame (16), Timing Belt assembly (5) is installed.First Timing Belt assembly (5) is put in the position that small band wheel shaft I (1) to pass when small pulley I (2) are installed, then a deep groove ball bearing is installed in gantry motor axle next one bearing groove, again small pulley I (2) is put in position during its work, again from frame working panel small band wheel shaft I (1) inserted above, pacifying into deep groove ball bearing above frame working panel again, finally this is then that fastening small pulley I (2) is on small band wheel shaft I (1).In this mounting means, small pulley II (4) and big belt wheel (6) are installed.Followed by installing hold-down mechanism, by compressing wheel shaft (11) and nut (10), Timing Belt contact roller (12) is fixed on Timing Belt pressure strip (8), again pressure strip (8) is arranged in frame by straight pin (7), install holddown spring (9) again, just reach to compress the effect of Timing Belt.Finally containing box II (13), containing box III (15) and the containing box I (14) equipped with electric-controlled parts are installed in frame.Above frame working panel, motor and angular displacement sensor first can be installed, motor (20) and angular displacement sensor I (19) back-off are arranged on the frame working panel lower left corner, and two axles all stretch into below working panel and are fixed on the small band wheel shaft I (1) of correspondence, small band wheel shaft II (3).Then driven lever shaft crosstie (18) is installed in the guide rail on the right side of frame, and uses screw threads for fastening.The assembling of driven shaft holder assembly and installation, driven shaft I (24) installs two deep groove ball bearings, then it is placed in driven axle bed (26), spring fastener is installed again and prevents its axial runout, another side established angle displacement transducer II (31) at driven axle bed (26), it axially stretches out driven axle bed (26), gear I (25) and gear III (30) are packed on driven shaft (24) and angular displacement sensor axle (29), again gear II (28) is arranged in the middle of the upper two other gear of driven axle bed (26), connect two other gear, driven axle bed I (26) after assembling is fixed on driven shaft crossbeam (18) by two thumbscrews.The assembling of connecting rod, as it is shown on figure 3, bar (37) inserts in the outer bar (35) of connecting rod in connecting rod, re-uses butterfly ellipse pin (36) and axially fastens.
The present invention can complete the demonstration of crank and rocker mechanism, as shown in Fig. 2 a, b.First will be put in horizontal table top by the above-mentioned frame assembled, again that connecting rod II (21), connecting rod III (22), connecting rod IV (23) is end to end with connecting axle, again by affixed to the other end of connecting rod II (21) and main shaft (17), the other end of connecting rod IV (23) is affixed with driven shaft (24).Adjust main shaft and driven shaft wheelbase is 130mm.Unscrew the butterfly ellipse pin on (turning 90 °) connecting rod II (21), regulate bar and the outer bar of connecting rod in connecting rod make connecting rod two ends distance of shaft centers be 100mm(and connecting rod II (21) long for 100mm, also it is connecting rod II minimum length), then tighten butterfly ellipse pin (36) on (reversing 90 °) connecting rod II (21).In the same way, regulating connecting rod III (22) long is also connecting rod II greatest length for 160mm(), regulate connecting rod IV (23) long for 180mm.Start motor, circumferential rotation type, the demonstration of crank and rocker mechanism can be carried out.
The present invention can complete the demonstration of double-crank mechanism, on the basis of the demonstration (Fig. 2) of crank and rocker mechanism, regulates connecting rod II (21) long for 160mm.Start motor, circumferential rotation type, the demonstration of double-crank mechanism can be carried out.
The present invention can complete the demonstration of double rocker mechanism, on the demonstration basis of double-crank mechanism, regulates connecting rod II (21) long for 100mm.Start motor, by calculating the positive and negative rotation of stroke cycle, the demonstration of double rocker mechanism can be carried out.
The present invention can complete the demonstration of planar linkage overlaying mechanism, on the basis of the demonstration of double rocker mechanism, is joined end to end by three connecting rods II with connecting axle, and bar link chain head and the tail are connected to connecting rod III (22).Start motor, by calculating the positive and negative rotation of stroke cycle, the demonstration of planar linkage overlaying mechanism can be carried out.
The present invention can complete the demonstration of planar linkage passive constraint mechanism, on the demonstration basis of double rocker mechanism, hinged place at connecting rod II (21) and connecting rod IV (23), connect connecting rod III (22), connecting rod III (22) other end connects a connecting rod IV (23) again, its other end is connected to driven shaft, and driven shaft is installed on driven axle bed II (27), installs axle in connecting rod III hinge joint place and supports multi-directional ball.Regulating driven axle bed I (26) with driven axle bed II (27) from 160mm, connecting rod II (21) is long is 130mm, and connecting rod III (22) is long is 160mm, and two connecting rods IV (23) are long for 160mm.Start motor, by calculating the positive and negative rotation of stroke cycle, the demonstration of planar linkage passive constraint mechanism can be carried out.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention.The conversion of structure, material and purposes that every present invention of utilization and accompanying drawing content are made, all in like manner includes in the scope of patent protection of the present invention.
Claims (6)
1. a horizontal plane linkage combination type teaching aid, it is characterised in that: described horizontal plane linkage combination type teaching aid includes rack section, motion parts, power section and the part that tests the speed；Rack section includes frame, driven shaft crossbeam and containing box；Motion parts includes link assembly, connects axle and axle support multi-directional ball；Power section includes the input control part in motor, main shaft, Timing Belt assembly and electric cabinet；The part that tests the speed includes the speed acquisition part in angular displacement sensor, driven shaft holder assembly and electric cabinet.
2. a kind of horizontal plane linkage combination type teaching aid according to claim 1, it is characterised in that: the integrated component of described frame, adopt welding manner splicing；Based on working panel, at four welded corner joint columns as a spike；Under working panel, 6 panels reinforcement plates are indulged with crossing main spindle's welding three horizontal three in working panel four limit；The mounting structure of main shaft, motor shaft and angular displacement sensor axle these three axle and the drawer type crossbeam of three support containing boxs is also welded below panel；By the mode of four spikes of welding on the right side of working panel, weld driven shaft beam guideway；On a spike in the lower right corner, welding driven shaft holder assembly deposits beam.
3. a kind of horizontal plane linkage combination type teaching aid according to claim 1, it is characterized in that: described link assembly includes bar in connecting rod, the outer bar of connecting rod, butterfly ellipse pin and two deep groove ball bearings, or deep groove ball bearing adds the retainer ring of a class bearing；The affixed deep groove ball bearing in one end of bar in connecting rod, adopt interference fit or in addition with welding, the other end inserts in the outer bar of connecting rod, re-uses butterfly ellipse pin and axially fastens, the affixed deep groove ball bearing of the other end of the outer bar of connecting rod or the retainer ring of class bearing.
4. a kind of horizontal plane linkage combination type teaching aid according to claim 1, it is characterized in that: described Timing Belt assembly includes a big belt wheel, two small pulleys, three belt shafts, six deep groove ball bearings, Timing Belt and Timing Belt hold-down mechanism, belt shaft consolidates a belt wheel, two ends are each affixed deep groove ball bearing again, and these parts are arranged in frame, again through Timing Belt, belt wheel is coupled together, finally with rack-mounted Timing Belt hold-down mechanism, Timing Belt is compressed.
5. a kind of horizontal plane linkage combination type teaching aid according to claim 1, it is characterised in that: described driven shaft holder assembly includes the gear on driven axle bed, two thumbscrews, driven shaft, two deep groove ball bearings, spring fastener, driven shaft gear and gear I, increment idle pulley and gear II, angular displacement sensor and gear III, angular displacement sensor；Driven shaft installs two deep groove ball bearings, then it is placed in driven axle bed, spring fastener is installed again and prevents its axial runout, another side established angle displacement transducer at driven axle bed, it axially stretches out driven axle bed, gear I and gear III are packed on driven shaft and angular displacement sensor axle, again gear II is arranged on driven axle bed in the middle of two other gear, connecting two other gear, the driven axle bed after assembling is fixed on driven shaft crossbeam by two thumbscrews or driven shaft holder assembly is deposited on beam.
6. a kind of horizontal plane linkage combination type teaching aid according to claim 1, it is characterised in that: described electric cabinet includes containing box and the containing box I in motor driver, data processor and A/D module, PWM module, bluetooth module and the frame lower right corner；Each physical arrangement dispersion of motor driver and data processor is fixed in containing box I, and perforate fills power interface on containing box I right side wall, and last containing box is placed under the working panel of the frame lower right corner with drawer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086162.0A CN105788436A (en) | 2016-02-16 | 2016-02-16 | Horizontal plane linkage combined type teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086162.0A CN105788436A (en) | 2016-02-16 | 2016-02-16 | Horizontal plane linkage combined type teaching aid |
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| CN105788436A true CN105788436A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610086162.0A Pending CN105788436A (en) | 2016-02-16 | 2016-02-16 | Horizontal plane linkage combined type teaching aid |
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| CN (1) | CN105788436A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108932893A (en) * | 2017-05-27 | 2018-12-04 | 南京农业大学 | Planar motion mechanism innovation overlap joint experimental bench |
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| CN2498583Y (en) * | 2001-09-28 | 2002-07-03 | 长沙天心区机电教学仪器厂 | Crank, guide pole and slide block mechanism test table |
| CN103578343A (en) * | 2013-10-23 | 2014-02-12 | 沈阳建筑大学 | Comprehensive multi-rod mechanism teaching demonstration platform |
| CN104021719A (en) * | 2014-05-12 | 2014-09-03 | 南昌大学 | Planar linkage mechanism combined teaching aid |
| CN203910156U (en) * | 2014-05-22 | 2014-10-29 | 杭州电子科技大学 | Teaching aid of cam and rod mechanisms |
| CN203910157U (en) * | 2014-05-28 | 2014-10-29 | 桂林电子科技大学 | Four-bar mechanism evolution teaching aid |
| CN203966436U (en) * | 2014-04-29 | 2014-11-26 | 江汉大学 | A kind of four-bar linkage apparatus for demonstrating |
| CN204087683U (en) * | 2014-11-05 | 2015-01-07 | 青岛科技大学 | A kind of Novel integrated machinery teaching aid |
| CN204102442U (en) * | 2014-07-11 | 2015-01-14 | 湖北工程学院 | A kind of combined mechanism teaching aid |
| CN104464494A (en) * | 2014-12-25 | 2015-03-25 | 北京理工大学 | Teaching analyzing instrument of planar linkage mechanism |
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2016
- 2016-02-16 CN CN201610086162.0A patent/CN105788436A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498583Y (en) * | 2001-09-28 | 2002-07-03 | 长沙天心区机电教学仪器厂 | Crank, guide pole and slide block mechanism test table |
| CN103578343A (en) * | 2013-10-23 | 2014-02-12 | 沈阳建筑大学 | Comprehensive multi-rod mechanism teaching demonstration platform |
| CN203966436U (en) * | 2014-04-29 | 2014-11-26 | 江汉大学 | A kind of four-bar linkage apparatus for demonstrating |
| CN104021719A (en) * | 2014-05-12 | 2014-09-03 | 南昌大学 | Planar linkage mechanism combined teaching aid |
| CN203910156U (en) * | 2014-05-22 | 2014-10-29 | 杭州电子科技大学 | Teaching aid of cam and rod mechanisms |
| CN203910157U (en) * | 2014-05-28 | 2014-10-29 | 桂林电子科技大学 | Four-bar mechanism evolution teaching aid |
| CN204102442U (en) * | 2014-07-11 | 2015-01-14 | 湖北工程学院 | A kind of combined mechanism teaching aid |
| CN204087683U (en) * | 2014-11-05 | 2015-01-07 | 青岛科技大学 | A kind of Novel integrated machinery teaching aid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108932893A (en) * | 2017-05-27 | 2018-12-04 | 南京农业大学 | Planar motion mechanism innovation overlap joint experimental bench |
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Application publication date: 20160720 |