CN203838955U - Epicyclic gear train demonstration instrument - Google Patents
Epicyclic gear train demonstration instrument Download PDFInfo
- Publication number
- CN203838955U CN203838955U CN201420232616.7U CN201420232616U CN203838955U CN 203838955 U CN203838955 U CN 203838955U CN 201420232616 U CN201420232616 U CN 201420232616U CN 203838955 U CN203838955 U CN 203838955U
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- wheel
- main shaft
- friction wheel
- counter
- handle
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Abstract
The utility model provides an epicyclic gear train demonstration instrument used for demonstrating transmission of epicyclic gear trains and verifying the transmission ratio formula of epicyclic gear trains. The epicyclic gear train demonstration instrument is characterized in that: the instrument comprises an epicyclic gear train, a support frame and three counters; the epicyclic gear train comprises a main shaft, a tie rod, two hollow casings, two small planet gears and two large planet gears, a small friction gear, a large friction gear, a first handle and a second handle, wherein the tie rod is fixedly mounted in the middle of the main shaft, the two hollow casings rotatably sleeve the two ends of the tie rod, the two small planet gears and the two large planet gears detachably sleeve the two casings respectively and rotate coaxially, the small friction gear is mounted on the main shaft and the surface of the small friction gear is in friction contact with the edges of the two small planet gears, the large friction gear hollowly sleeves the main shaft and the surface of the large friction gear is in friction contact with the two large planet gears, the first handle is mounted at one end of the main shaft and is fixedly connected with the small friction gear, and the second handle is fixedly connected with the other end of the main shaft; and the three counters include a small friction gear counter, a tied rod counter and a large friction gear counter.
Description
Technical field
The utility model relates to the teaching aid that classroom instruction is used, and a kind of cyclic train demonstrator by friction gearing of specific design, can be used for verifying that epicyclic gearing compares formula.
Background technology
On mechanical classroom of today, various teaching aids help student to understand fully knowledge, have also greatly improved the efficiency that teacher attends class simultaneously.But, still be not used for demonstrating at present the teaching aid of epicyclic gearing principle.In addition, for the computing formula of epicyclic gearing ratio
students is indigestion also.Students wishes to have a teaching aid to demonstrate the transmission of cyclic train, and verifies its gear ratio calculation formula.
Utility model content
The utility model carries out for the problems referred to above, and object is to provide a kind of can demonstrate epicyclic gearing process, and verifies that epicyclic gearing is than the teaching aid of computing formula.
The utility model, for addressing the above problem, has adopted following technical scheme.
The utility model provides a kind of cyclic train demonstrator, it is characterized in that, comprising: cyclic train, for demonstrating transmission process; Bracing frame, for installing and support cyclic train; And three counters, wherein, cyclic train comprises: main shaft; Be fixedly mounted on this main shaft middle part, with the perpendicular tie-rod of main shaft; Be sleeved on rotationally two hollow sleeve pipes at these tie-rod two ends; Removably be sleeved on respectively two asteroid wheels of two sleeve pipe inner sides; Removably be sleeved on respectively two outside of sleeve and take turns with two major planets of two asteroid wheel coaxial rotation; Be installed in rotation on main shaft, take turns with the friction of the edge rubbing contact of two asteroid wheels on surface; Empty set on main shaft, the big friction wheel of surface and two major planets wheel rubbing contact; Be arranged on main shaft one end, the first handle being fixedly connected with friction wheel; And the second handle being fixedly connected with the other end of main shaft, two asteroid wheels and two major planet wheels are installed about main shaft is symmetrical respectively, asteroid wheel and the position-adjustable of major planet wheel on sleeve pipe, three counters comprise friction wheel counter, tie-rod counter and big friction wheel counter, friction wheel counter and first handle are fixedly linked, tie-rod counter and second handle are fixedly linked, and big friction wheel counter is connected with big friction wheel with belt by belt wheel.
The effect of utility model and effect
According to cyclic train demonstrator of the present utility model, by rotating left handle, to control friction wheel and rotate, friction wheel utilizes friction force to drive two asteroid wheel rotations, and two asteroid wheels drive the rotation of major planet wheel by planet carrier; By rotating right handles, make main shaft drive tie-rod to rotate, planet carrier rotates around the spindle under the effect of tie-rod, drives asteroid wheel and major planet wheel with respect to the revolution of friction wheel, major planet wheel drives big friction wheel to rotate by rubbing action, thereby demonstrates out the transmission process of cyclic train.
Meanwhile, because the revolution of friction wheel, tie-rod and big friction wheel in same time can be recorded respectively with counter, can calculate the ratio of gear of cyclic train; Calculating takes turns to the continued product of effective diameter of all engaged wheels of big friction wheel from friction, divided by the continued product of effective diameter that takes turns to all driving wheels of big friction wheel from friction, utilize epicyclic gearing to calculate ratio of gear than the right-hand part of computing formula, the gear ratio value that above-mentioned two kinds of methods are calculated is compared, and can verify that epicyclic gearing compares formula.
In addition, change asteroid wheel and the position of major planet wheel on planet carrier, i.e. the effective diameter of adjustable friction wheel and big friction wheel, thus change ratio of gear, epicyclic gearing is carried out to multiple authentication than computing formula.
Accompanying drawing explanation
Fig. 1 is the structural representation of cyclic train demonstrator; With
Fig. 2 is the front view of cyclic train demonstrator.
Embodiment
Below in conjunction with accompanying drawing, the cyclic train demonstrator related to the utility model is elaborated.
< embodiment >
Fig. 1 is the structural representation of cyclic train demonstrator.
As shown in Figure 1, cyclic train demonstrator 10 comprises cyclic train 11, bracing frame 12, friction wheel counter 13, tie-rod counter 14 (not shown)s and big friction wheel counter 15 (not shown)s.
Fig. 2 is the front view of cyclic train demonstrator.
As shown in Figure 1, 2, cyclic train 11, for demonstrating transmission process, comprises main shaft 16, tie-rod 17, sleeve pipe 18, sleeve pipe 19, asteroid wheel 20, asteroid wheel 21, major planet wheel 22, major planet wheel 23, friction wheel 24, big friction wheel 25, first handle 26 and second handle 27.
Main shaft 16 levels are arranged on bracing frame 12.
Tie-rod 17 is fixedly mounted on the middle part of main shaft 16, perpendicular with main shaft 16.
Sleeve pipe 18 and sleeve pipe 19 are enclosed within respectively on tie-rod 17, are positioned at the both sides of main shaft 16.
Asteroid wheel 20 and major planet wheel 22 are arranged on respectively on sleeve pipe 18, all take sleeve pipe 18 as axle rotation, and wherein asteroid wheel 20 is positioned on sleeve pipe 18 near a side of main shaft 16, outside major planet wheel 22 is positioned at.Asteroid wheel 21 and major planet wheel 23 are arranged on respectively on sleeve pipe 19, all take sleeve pipe 19 as axle rotation, and asteroid wheel 21 is positioned on sleeve pipe 19 near a side of main shaft 16, outside major planet wheel 23 is positioned at.Asteroid wheel 20 and asteroid wheel 21, major planet wheel 22 and major planet wheel 23 are respectively about main shaft 16 symmetries.
Friction wheel 24 is arranged on main shaft 16, with asteroid wheel 20 and asteroid wheel 21 rubbing contact, can change the pressure between friction wheel 24 and asteroid wheel 20 and asteroid wheel 21 by setting nut 28, spring 29 is to providing a pretightning force, increasing friction force between friction wheel 24 and asteroid wheel 20 and asteroid wheel 21.
The opposite side of big friction wheel 25 empty sets on main shaft 16, takes turns 23 rubbing contact with major planet wheel 22 and major planet.
First handle 26 is arranged on main shaft 16 one end, and first handle 26 is fixedly connected with friction wheel 24, can drive 24 rotations of friction wheel.
Second handle 27 is arranged on main shaft 16 other ends, and second handle 27 is fixed on main shaft 16, and the rotation of second handle 27 can drive main shaft 16 rotations.
As shown in Figure 1, 2, bracing frame 12 is for installing and support cyclic train 11.
Friction wheel counter 13 is for recording the revolution of friction wheel 24.Friction wheel counter 13 is fixedly mounted between bracing frame 12 and first handle 26.When first handle 26 drives friction wheel 24 to rotate, first handle 26 is identical with the revolution of friction wheel 24, and friction wheel counter 13 can be recorded the revolution of friction wheel 24.
Tie-rod counter 14 is for recording the revolution of tie-rod 17.Tie-rod counter 14 is fixedly mounted on main shaft 16, between support 12 and second handle 27.When second handle 27 drives main shaft 16 to rotate, main shaft 16 drives the same revolution of tie-rod 17 rotating photos, and tie-rod counter 14 can illustrate by recording the tachometer of main shaft 16 revolution of tie-rod 17.
Big friction wheel counter 15 is for recording the revolution of big friction wheel 25.Big friction wheel counter 15 is arranged on bracing frame 12, by belt wheel 30, is connected with big friction wheel 25 with belt 31.When big friction wheel 25 rotates, by belt 31 band movable belt pulleys 30, rotate, belt wheel 30 is identical with the revolution of big friction wheel 25, and big friction wheel counter 15 is expressed the revolution of big friction wheel 25 by recording the revolution of belt wheel 30.
User can rotate first handle 26, drive 24 rotations of friction wheel, friction wheel 24 drives asteroid wheel 20 and asteroid wheel 21 by friction force, and asteroid wheel 20 drives 22 rotations of major planet wheel by sleeve pipe 18, and asteroid wheel 21 drives 23 rotations of major planet wheel by sleeve pipe 19; Major planet wheel 22 and major planet wheel 23 drive big friction wheel 25 to rotate by rubbing action.Meanwhile, rotate second handle 27, drive main shaft 16 rotations, main shaft 16 drives tie-rod 17 and sleeve pipe 18, sleeve pipe 19 to rotate around main shaft 16; Sleeve pipe 18 and sleeve pipe 19 drive respectively asteroid wheel 20 and major planet wheel 22, asteroid wheel 21 and major planet wheel 23 in rotation, also round main shaft 16 revolution, thereby demonstrate out the transmission process of cyclic train 10.
In above-mentioned transmission process, with friction wheel counter 13, record respectively the revolution n of friction wheel 24
a, with tie-rod counter 14, record the revolution n of tie-rod 17
h, with big friction wheel counter 15, record the revolution n of big friction wheel 25
b.Because friction wheel 24, tie-rod 17 are identical with the rotation time of big friction wheel 25, can pass through
calculate the ratio of gear of cyclic train 10
Because the number of teeth of driving wheel and engaged wheel is all directly proportional to its girth, and adopts friction pulley in the present embodiment, therefore epicyclic gearing can be converted into than formula:
In the present embodiment, the diameter of two major planet wheels is 75mm, the diameter of two asteroid wheels is 50mm, can be respectively by regulating two asteroid wheels and two the major planet wheels position on sleeve pipe to adjust effective radius of clean-up of friction wheel 24 and big friction wheel 25, effective radius of clean-up adjustable extent of friction wheel 24 is 14～76mm, and effective radius of clean-up adjustable extent of big friction wheel 25 is 92～123mm.
Effective radius of clean-up of friction wheel 24 is adjusted into 60mm, effective radius of clean-up 25 of big friction wheel 25 is adjusted into 110mm.Rotate first handle 26 and second handle 27 simultaneously, make all friction pulleys, planetary gear and tie-rod rotate certain identical time, the record of three counters is as follows: n
a=8.85, n
b=13.61, n
h=11.54, obtain the ratio of gear of cyclic train 11:
negative sign represents the direction of rotation of friction wheel 24 and big friction wheel 25.
Adopt the theoretical ratio of gear of the diameter calculating cyclic train 11 of driving wheel and engaged wheel to obtain:
negative sign represents the direction of rotation of friction wheel 24 and big friction wheel 25, because adopt a major planet wheel and an asteroid wheel, can realize transmission, arranging of another major planet wheel and asteroid wheel mainly plays equilibrium activity, therefore only relate to the diameter of a major planet wheel and an asteroid wheel while calculating.
Adopt driving wheel than 1.299, to compare the error of only having 6.5% with actual transmission with the ratio of gear 1.222 that engaged wheel diameter calculates, can think formula
correctly, verified that epicyclic gearing is than the correctness of computing formula.
The effect of embodiment and effect
The cyclic train demonstrator that the present embodiment is related, because adopt friction wheel to drive asteroid wheel rotation, asteroid wheel drives the rotation of major planet wheel by sleeve pipe; Main shaft drives tie-rod rotation, and tie-rod drives asteroid wheel and major planet wheel around main shaft, to revolve round the sun in rotation, and major planet wheel drives big friction wheel to rotate, thereby drills the transmission process that shows cyclic train.
Meanwhile, because record respectively the revolution of friction wheel, tie-rod and big friction wheel with three counters, thereby can calculate the actual transmission ratio of cyclic train; Adopt the diameter of driving wheel friction wheel, major planet wheel and engaged wheel asteroid wheel, big friction wheel than the theoretical ratio of gear that calculates cyclic train, compare with actual transmission ratio, find that two data are substantially equal, can verify that epicyclic gearing is than the correctness of formula.
Certainly; the related cyclic train demonstrator of the utility model is not merely defined in the structure described in above embodiment; these are only basic explanation of the present utility model, and any equivalent transformation of doing according to the technical solution of the utility model all should belong to protection domain of the present utility model.
In addition, in the present embodiment, effective radius of clean-up of friction wheel is adjusted into 60mm, the radius of clean-up of big friction wheel is adjusted into 110mm, can also be by adjusting the position of asteroid wheel on sleeve pipe, effective radius of clean-up of friction wheel is adjusted into the arbitrary value within the scope of 14～76mm, by adjusting the position of major planet wheel on sleeve pipe, effective radius of clean-up of big friction wheel is adjusted into the arbitrary value within the scope of 92～123mm, can change the ratio of gear of cyclic train, thereby epicyclic gearing is carried out to multiple authentication than formula.
Claims (1)
1. a cyclic train demonstrator, for demonstrating the transmission of cyclic train, and verifies that epicyclic gearing, than formula, is characterized in that, comprising:
Cyclic train, for demonstrating transmission process;
Bracing frame, for installing and support described cyclic train; And
Three counters,
Wherein, described cyclic train comprises: main shaft; Be fixedly mounted on this main shaft middle part, with the perpendicular tie-rod of described main shaft; Be sleeved on rotationally two hollow sleeve pipes at these tie-rod two ends; Removably be sleeved on respectively two asteroid wheels of two described sleeve pipe inner sides; Removably be sleeved on respectively two described outside of sleeve and take turns with two major planets of two described asteroid wheel coaxial rotation; Be installed in rotation on described main shaft, take turns with the friction of the edge rubbing contact of two described asteroid wheels on surface; Empty set on described main shaft, the big friction wheel of surface and two described major planets wheel rubbing contact; Be arranged on described main shaft one end, the first handle being fixedly connected with described friction wheel; And the second handle being fixedly connected with the other end of described main shaft,
Two described asteroid wheels and two described major planet wheels are installed about described main shaft is symmetrical respectively, described asteroid wheel and the position-adjustable of described major planet wheel on described sleeve pipe,
Described three counters comprise friction wheel counter, tie-rod counter and big friction wheel counter, described friction wheel counter and described first handle are fixedly linked, described tie-rod counter and described second handle are fixedly linked, and described big friction wheel counter is connected with described big friction wheel with belt by belt wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232616.7U CN203838955U (en) | 2014-05-08 | 2014-05-08 | Epicyclic gear train demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232616.7U CN203838955U (en) | 2014-05-08 | 2014-05-08 | Epicyclic gear train demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203838955U true CN203838955U (en) | 2014-09-17 |
Family
ID=51516769
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420232616.7U Expired - Fee Related CN203838955U (en) | 2014-05-08 | 2014-05-08 | Epicyclic gear train demonstration instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332095A (en) * | 2014-09-19 | 2015-02-04 | 杭州电子科技大学 | Swing follower cam-gear train combination teaching aid |
| CN104346990A (en) * | 2014-11-23 | 2015-02-11 | 王齐贤 | Novel wheel train training aid |
| CN104575230A (en) * | 2014-12-19 | 2015-04-29 | 福建工程学院 | Experimental device for calculation and verification of transmission ratio and comprehensive structural analysis of gear train |
-
2014
- 2014-05-08 CN CN201420232616.7U patent/CN203838955U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332095A (en) * | 2014-09-19 | 2015-02-04 | 杭州电子科技大学 | Swing follower cam-gear train combination teaching aid |
| CN104332095B (en) * | 2014-09-19 | 2017-03-29 | 杭州电子科技大学 | Cam of oscillating follower train combined appliance for teaching |
| CN104346990A (en) * | 2014-11-23 | 2015-02-11 | 王齐贤 | Novel wheel train training aid |
| CN104346990B (en) * | 2014-11-23 | 2018-02-13 | 李华良 | Train teaching aid |
| CN104575230A (en) * | 2014-12-19 | 2015-04-29 | 福建工程学院 | Experimental device for calculation and verification of transmission ratio and comprehensive structural analysis of gear train |
| CN104575230B (en) * | 2014-12-19 | 2017-08-08 | 福建工程学院 | It is a kind of to verify the experimental provision analyzed with structure composition for train gear ratio calculation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150508 |
|
| EXPY | Termination of patent right or utility model |