CN104332097B - A kind of two-sided teaching aid - Google Patents
A kind of two-sided teaching aid Download PDFInfo
- Publication number
- CN104332097B CN104332097B CN201410509308.9A CN201410509308A CN104332097B CN 104332097 B CN104332097 B CN 104332097B CN 201410509308 A CN201410509308 A CN 201410509308A CN 104332097 B CN104332097 B CN 104332097B
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- China
- Prior art keywords
- teaching aid
- gear wheel
- engine
- gripper shoe
- piston
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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)
- Instructional Devices (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of two-sided teaching aid, it is characterised in that：Including gripper shoe, motor, the gripper shoe is erect and is arranged, and the one side of gripper shoe is engine demonstration teaching aid, and another side is shaping machine demonstration teaching aid；The motor drives driven pinion rotation by active gear wheel, so as to drive toggle that convert rotational motion does reciprocating linear motion in cylinder body for the piston in engine demonstration teaching aid；Motor drives driven gear wheel rotation by active gear wheel, driven pinion, so as to promote ram in shaping machine demonstration teaching aid to do reciprocating linear motion.The present invention is utilization of the toggle in engine in the one side of gripper shoe, and another side is utilization of the toggle in shaping machine.It is related to knowledge point many, application is strong；Using Open architecture, simple structure；Possess multifunctional mode, make simply, easy to maintenance, small volume, light weight are easy to carry, with low cost.
Description
Technical field
The present invention relates to mechanical teaching demonstration utensil, specifically a kind of two-sided teaching aid.
Background technology
?《Fundamentals of Machine Design》、《Fundamental Course of Mechanic Manufacturing》And《Vehicle Engine Structure and principle》Teaching Deng course
In, student understands for convenience, generally uses demonstration teaching aid or plays the means such as three-dimensional simulation animation.But just investigation finds at present
The teaching aid for being used can only demonstrate the operation principle of a certain mechanism, and which uses category to be subject to local restriction, fail performance comprehensively
Go out the demonstration lesson effect of teaching aid, teaching aid is relatively costly.
Content of the invention
The purpose of the present invention is for overcoming the deficiencies in the prior art, and provides and a kind of there are double demo function, teaching efficiencies
Preferably, the two-sided teaching aid of the lower-cost toggle of teaching aid, this two-sided teaching aid may be not only suitable for《Machine Design base
Plinth》The teaching chapters and sections of " planar linkage mechanism " of course,《Fundamental Course of Mechanic Manufacturing》The structure of " shaping machine " of course and work
Theory teaching chapters and sections, and could be applicable to《Vehicle Engine Structure and principle》" engine construction and the operation principle " of course
Deng teaching chapters and sections.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of two-sided teaching aid, including
Gripper shoe, the gripper shoe are erect and are arranged, and the one side of gripper shoe is engine demonstration teaching aid, and another side is shaping machine
Bed demonstration teaching aid；
Motor, the motor drive driven pinion rotation by active gear wheel, so as to drive toggle to incite somebody to action
Convert rotational motion is that the piston in engine demonstration teaching aid does reciprocating linear motion in cylinder；
Motor drives driven gear wheel rotation by active gear wheel, driven pinion, so as to promote shaping machine to demonstrate
In teaching aid, ram does reciprocating linear motion.
The piston that described engine demonstration teaching aid is included cylinder block and is adapted to cylinder block, piston is by connecting rod and company
Bar axle journal, the first crankshaft crank, the second crankshaft crank connection, the first crankshaft crank by the first trunnion, the second crankshaft crank,
Second trunnion and engine body are connected as a single entity and form toggle, the rear end of the first trunnion of engine with driven
Little gear connects.
Described shaping machine demonstration teaching aid includes fork, ram and is arranged on the fixed dovetail of gripper shoe upper end, sliding
Pillow is equipped with fixed dovetail, and by fork joint pin fixed hinge on the supporting plate, upper end passes through fork ram for the lower end of fork
Connecting pin is connected with ram, and middle part is hinged on driven gear wheel by oscillating bar crank pin and forms throw of crankshaft, driven canine tooth
Wheel is connected with active gear wheel by driven pinion.
Also include engine impulse stroke instruction device.
The engine impulse stroke instruction device is four colored lights instruction devices, including the LED of four kinds of different colours, respectively
LED is connected with the controlling switch with a pair of normally-closed contacts, a pair of normally opened contacts, and normally opened contact is connected with the trigger electrode of driving stroke
Connect.
Described controlling switch is distributed on beside the outer rim of active gear wheel, and active gear wheel is provided with a signal light control
Impactor, when signal light control Impactor is with active bull gear drive, is successively contacted with each controlling switch respectively, makes controlling switch
Normally-closed contact, normally opened contact disconnect, closure, make the LED of different colours alternately luminous, indicate engine cylinder with the color of LED
Residing stroke.
When the piston is in the top dead point, the one of contact in signal light control Impactor and four controlling switches.
Described active gear wheel is 1 with the gearratio of driven pinion:2.
This teaching aid is utilization of the toggle in engine in the one side of gripper shoe, and another side is toggle
Utilization in shaping machine.The knowledge point being related to is more, and application is strong；Using Open architecture, simple structure；Possess multi-functional
Pattern, bilateral structure, while the different operating stroke in engine working process is represented using different light colors, to
The different sense organ visual stimulus of life, has deepened understanding of the student to knowledge.The teaching aids making is simple, easy to maintenance, small volume, matter
Amount is light, easy to carry, with low cost.
This teaching aid may be not only suitable for《Fundamentals of Machine Design》The teaching chapters and sections of " planar linkage mechanism " of course,《Machinery
Manufacture basis》The structure ＆ working mechanism teaching chapters and sections of " shaping machine " of course, and could be applicable to《Automobile engine is tied
Structure and principle》The teaching such as " engine construction and the operation principle " of course chapters and sections.
Description of the drawings
Fig. 1 is the structural representation of a face engine demonstration teaching aid of gripper shoe in embodiment；
Fig. 2 is the structural representation of the another side shaping machine demonstration teaching aid of gripper shoe in embodiment；
Left views of the Fig. 3 for Fig. 2；
Fig. 4 is the lighting control circuit schematic diagram in four colored lights instruction devices.
In figure, 1. 2. engine body of motor, 3. first 4. first crankshaft crank of trunnion, 5. rod journal 6. connects
10. fork of bar 7. piston pin, 8. piston, 9. cylinder block 11. fixes 12. ram of dovetail, 13. gripper shoe, 14. indicator lamp group
15. second 16. second trunnion of trunnion bushing, 17. second bearing, 18. first piston pin bush(ing) of plywood 19. second is lived
23. controlling switch fixed plate of plug pin bushing 20. driven gear wheel, 21. oscillating bar crank pin, 22. active gear wheel 24. first is controlled
The system switch control of 25. second 26. first trunnion bushing of crankshaft crank, 27. clutch shaft bearing, 28. supporting pin 29. second is opened
Close 30. the 3rd the 4th controlling switch of controlling switch 31., 32. fork ram connecting pin, 33. first flat key, 34. driven little tooth
Take turns 35. fork joint pin, 36. signal light control Impactor, 37. second flat key.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings and examples, but is not limitation of the invention.
Embodiment：
Reference picture 1- Fig. 4, a kind of two-sided teaching aid, including
Gripper shoe 13, the gripper shoe 13 are erect and are arranged, and the one side of gripper shoe 13 is engine demonstration teaching aid, and another side is
Shaping machine demonstration teaching aid；
Motor 1, the motor 1 drive driven pinion 34 to rotate by active gear wheel 22, so as to drive crank connecting link
Convert rotational motion is done reciprocating linear motion in cylinder block 9 by mechanism for the piston 8 in engine demonstration teaching aid；
Motor 1 drives driven gear wheel 20 to rotate by active gear wheel 22, driven pinion 34, so as to promote shaping machine
In bed demonstration teaching aid, ram 12 does reciprocating linear motion.
The piston 8 that described engine demonstration teaching aid is included cylinder block 9 and is adapted to cylinder block, piston 8 pass through connecting rod 6
Be connected with rod journal 5, the first crankshaft crank 4, the second crankshaft crank 25, the first crankshaft crank 4 by the first trunnion 3, the
Two crankshaft cranks 25, the second trunnion 16 are connected as a single entity and form toggle with engine body 2, and engine first is led
The rear end of axle journal 3 is connected with driven pinion 34.
Described shaping machine demonstration teaching aid includes fork 10, ram 12 and is arranged on the fixation of 13 upper end of gripper shoe
Dovetail 11, ram 12 are equipped with fixed dovetail 11, and the lower end of fork 10 passes through 35 fixed hinge of fork joint pin in gripper shoe 13
On, upper end is connected with ram 12 by fork ram connecting pin 32, and middle part is hinged at driven gear wheel by oscillating bar crank pin 21
On 20 and throw of crankshaft is formed, driven gear wheel 20 is connected with active gear wheel 22 by driven pinion 34.
Also include engine impulse stroke instruction device.
The engine impulse stroke instruction device is four colored lights instruction devices, including the LED of four kinds of different colours, respectively
LED is connected with the controlling switch with a pair of normally-closed contacts, a pair of normally opened contacts, and normally opened contact is connected with the trigger electrode of driving stroke
Connect.
Described controlling switch includes the first controlling switch 24, the second controlling switch 29, the 3rd controlling switch 30, the 4th control
System switch 31, each controlling switch is distributed on beside the outer rim of active gear wheel 22, and active gear wheel 22 is provided with a light control
Impactor processed 36, when signal light control Impactor 36 is rotated with active gear wheel 22, is successively contacted with each controlling switch respectively, makes control
The normally-closed contact of system switch, normally opened contact disconnect and closure, make the LED of different colours alternately luminous, indicate to send out with the color of LED
Stroke residing for engine cylinder.
When piston 8 is in top dead centre, signal light control Impactor 36 and four the first controlling switches of controlling switch 24, second
One of contact in controlling switch 29, the 3rd controlling switch 30, the 4th controlling switch 31.
Described active gear wheel 22 is 1 with the gearratio of driven pinion 34:2.
Specifically, in engine demonstration teaching aid, the rear end of the first trunnion of engine 3 is connected driven by the first flat key 33
Little gear 34, motor 1 drive driven pinion 34 to rotate by active gear wheel 22, so as to drive toggle rotate
Conversion of motion is that piston 8 does reciprocating linear motion in cylinder block 9, and piston 8 is connected with connecting rod 6 by piston pin 7, piston pin 7
It is connected with connecting rod 6 by first piston pin bush(ing) 18, second piston pin bush(ing) 19.First trunnion 3 is served as a contrast by the first trunnion
Set 26, clutch shaft bearing 27 is connected with engine body 2.Second trunnion 16 passes through the second trunnion bushing 15, second bearing 17
It is connected with engine body 2.Active gear wheel 22 is connected with the rotating shaft of motor 1 by the second flat key 37.
In shaping machine demonstration teaching aid, when motor 1 works, by active gear wheel 22, driven pinion 34 drive from
Dynamic gear wheel 20 rotates, so as to promote ram 12 to do reciprocating linear motion.
In four colored lights instruction devices, the enforcement of four colored lights of engine control is come real by circuit theory as shown in Figure 4
Existing, including controllable silicon SCR 1, SCR2, SCR3, SCR4, four colored lights LED1, LED2, LED3, LED4, resistance R1, R2, R3, R4, control
System switch K1, K2, K3, K4, battery GB.In figure, controlling switch has a pair of normally-closed contacts, a pair of normally opened contacts.Normally-closed contact with
Silicon controlled anode connects, and normally opened contact is connected with the trigger electrode G poles of subsequent work stroke.
In Fig. 3, in the outside of active gear wheel 22, controlling switch fixed plate 23 is fixed on support by 4 supporting pins 28
On plate 13.K1 in Fig. 4 be the first controlling switch 24, K4 be the second controlling switch 29, K3 be that the 3rd controlling switch 30, K2 is the
Four controlling switches 31, are distributed in controlling switch fixed plate 23, as shown in Fig. 2 the signal light control on active gear wheel 22 is touched
When collision block 36 is with active bull gear drive, successively respectively with the first controlling switch 24, the 4th controlling switch 31, the 3rd controlling switch
30th, the second controlling switch 29 is contacted, and makes disconnection, the closure of the normally-closed contact and normally opened contact of controlling switch.Due to engine
One trunnion 3 rotates 2 weeks, the reciprocating motion of piston 82 times, and engine completes working cycles, four colored lights alternate conductions 1 time, i.e.,
When driven pinion 34 rotates 2 weeks, active gear wheel 22 rotates 1 week.
In Fig. 4, when piston 8 is in top dead centre, induction stroke starts, and signal light control Impactor 36 is contacted with switch K1,
Its normally-closed contact disconnects, and normally opened contact is closed, and current trigger controllable silicon SCR 2 is turned on, and forms loop, and LED 2 sends blue light
Signal, shows and is in induction stroke；When being displaced downwardly to lower dead center with piston 8, when signal light control Impactor 36 is contacted with switch K2,
Its normally-closed contact disconnects, and LED 2 extinguishes, while normally opened contact closure, triggers controllable silicon SCR 3 and turn on, electric current forms loop, LED
3 send white light signal, indicate to be in compression stroke；With the propulsion of compression stroke, when piston 8 moves to top dead centre,
Signal light control Impactor 36 is contacted with switch K3, and its normally-closed contact disconnects, and LED 3 extinguishes, and normally opened contact is closed, and current trigger can
The SCR4 conductings of control silicon, form loop, and LED 4 sends green signal, indicate to be in working stroke；When piston 8 is turned again to
During lower dead center, signal light control Impactor 36 is contacted with switch K4, and its normally-closed contact disconnects, and LED 4 extinguishes, and normally opened contact is closed,
Current trigger controllable silicon SCR 1 is turned on, and forms loop, and LED1 sends red light signal, indicates to be in instroke.Four colored lights
The different colours of instruction device are designated as：Induction stroke LED2 blue indicator light is bright, compression stroke LED3 white indicating light
Bright, expansion stroke LED4 green indicating lamps are bright, and exhaust stroke LED1 red led is bright.Four colored lights are arranged on indicator lamp group
On plywood 14, indicator lamp compoboard 14 is arranged in gripper shoe 13.
The present invention takes Open architecture, imparts knowledge to students for convenience, the course of work directly perceived, the engine religion of 13 one side of gripper shoe
Lamps structure takes the shaping machine structure of the Open architecture of partly cut-away, 13 another side of gripper shoe to take unenclosed construction completely；
Bilateral structure, the two-sided teaching aid of toggle is taken to illustrate two kinds of different machines using the two sides of gripper shoe 13
Structure, be both related to mechanical design course organizational knowledge, further related to the structure ＆ working mechanism of machine.It is both mechanical teaching
Demonstration teaching aid, be the displaying model of the teaching of automotive-type again.The teaching aid good demonstration effect, applied range can be used as teacher
Teaching aid when giving lessons, it is also possible to as theory of mechanics or the reference model of Course Exercise in Mechanical Design and student's graduation project；
Take four colored lights to represent the different impulse stroke of engine, for ocular demonstration, deepen student and engine is worked
The understanding of stroke, the teaching aid with the lamp of four kinds of different colours shinny when represent the different courses of work.
Claims (6)
1. a kind of two-sided teaching aid, it is characterised in that：Including
Gripper shoe, the gripper shoe are erect and are arranged, and the one side of gripper shoe is engine demonstration teaching aid, and another side is drilled for shaping machine
Display teaching aid；
Motor, the motor drive driven pinion rotation by active gear wheel, so as to drive toggle rotate
Conversion of motion is that the piston in engine demonstration teaching aid does reciprocating linear motion in cylinder；
Motor drives driven gear wheel rotation by active gear wheel, driven pinion, so as to promote shaping machine demonstration teaching aid
Middle ram does reciprocating linear motion；
The piston that described engine demonstration teaching aid is included cylinder block and is adapted to cylinder block, piston is by connecting rod and pitman shaft
Neck, the first crankshaft crank, the second crankshaft crank connection, the first crankshaft crank by the first trunnion, the second crankshaft crank, second
Trunnion is connected as a single entity and forms toggle, the rear end of the first trunnion of engine and driven little tooth with engine body
Wheel connection；
Described shaping machine demonstration teaching aid includes fork, ram and is arranged on the fixed dovetail of gripper shoe upper end, ram with
Fixed dovetail is equipped with, and by fork joint pin fixed hinge on the supporting plate, upper end is connected by fork ram for the lower end of fork
Pin is connected with ram, and middle part is hinged on driven gear wheel by oscillating bar crank pin and forms throw of crankshaft, and driven gear wheel leads to
Cross driven pinion to be connected with active gear wheel.
2. two-sided teaching aid according to claim 1, it is characterised in that：Also include engine impulse stroke instruction device.
3. two-sided teaching aid according to claim 2, it is characterised in that：The engine impulse stroke instruction device is four colors
Lamp instruction device, including the LED of four kinds of different colours, each LED is opened with the control with a pair of normally-closed contacts, a pair of normally opened contacts
Connection connects, and normally opened contact is connected with the trigger electrode of driving stroke.
4. two-sided teaching aid according to claim 3, it is characterised in that：Described controlling switch is distributed on active gear wheel
Beside outer rim, active gear wheel is provided with a signal light control Impactor, when signal light control Impactor is with active bull gear drive,
Successively contact with each controlling switch respectively, the normally-closed contact of controlling switch, normally opened contact are disconnected, are closed, make different colours
LED is alternately luminous, indicates the stroke residing for engine cylinder with the color of LED.
5. two-sided teaching aid according to claim 4, it is characterised in that：When the piston is in the top dead point, signal light control collision
One of contact in block and four controlling switches.
6. two-sided teaching aid according to claim 1, it is characterised in that：Described active gear wheel and the biography of driven pinion
Dynamic ratio is 1:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509308.9A CN104332097B (en) | 2014-09-29 | 2014-09-29 | A kind of two-sided teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509308.9A CN104332097B (en) | 2014-09-29 | 2014-09-29 | A kind of two-sided teaching aid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104332097A CN104332097A (en) | 2015-02-04 |
| CN104332097B true CN104332097B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410509308.9A Expired - Fee Related CN104332097B (en) | 2014-09-29 | 2014-09-29 | A kind of two-sided teaching aid |
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| Country | Link |
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| CN (1) | CN104332097B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952355B (en) * | 2015-07-30 | 2017-12-08 | 邵阳学院 | Principles of Internal-Combustion Engine acousto-optic teaching demonstration system |
| CN107146513A (en) * | 2017-07-17 | 2017-09-08 | 融水苗族自治县教育局 | demonstration teaching aid |
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| Publication number | Publication date |
|---|---|
| CN104332097A (en) | 2015-02-04 |
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Granted publication date: 20170315 Termination date: 20170929 |