CN103745647B - The teaching aid of non-circular gear drive ratio can be reflected - Google Patents
The teaching aid of non-circular gear drive ratio can be reflected Download PDFInfo
- Publication number
- CN103745647B CN103745647B CN201310722294.4A CN201310722294A CN103745647B CN 103745647 B CN103745647 B CN 103745647B CN 201310722294 A CN201310722294 A CN 201310722294A CN 103745647 B CN103745647 B CN 103745647B
- Authority
- CN
- China
- Prior art keywords
- circular gear
- teaching aid
- driven
- gear
- dotted timer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Toys (AREA)
Abstract
<b>the present invention relates to a kind of teaching aid reflecting non-circular gear drive ratio, this teaching aid includes casing or support, is separately installed with by the motor-driven driving shaft with active non-circular gear with the driven shaft of the driven non-circular gear being meshed with active non-circular gear on this casing or support; This teaching aid also includes dotted timer and is arranged on the circle wheel of driven shaft end, and this circle wheel is provided with the rope being connected with the paper tape on dotted timer. Driven non-circular gear in this teaching aid drives driven shaft speed-changing rotation while speed-changing rotation, so that can get, by driven shaft speed-changing rotation rule, the spaced points that spacing does not wait on the paper tape of dotted timer, can reflect the gear ratio of non-circular gear.</b>
Description
Technical field
The present invention relates to a kind of teaching aid reflecting non-circular gear drive ratio.
Background technology
Gear ratio is the ratio of two revolving member angular velocity in mechanism, want the rule understanding gear ratio, in teaching field, if two revolving members adopt two intermeshing circular gears, because the angle of circular gear is identical, the mode of its ratio calculated is relatively easy; If adopting noncircular gear, the mode of its ratio calculated then relative complex, and the non-circular gear such as two intermeshing elliptic gears or oval gear is the knowledge point in " theory of mechanics " course middle gear transmission one chapter. Owing to the pitch curve (being equivalent to the reference circle of Knucle-gear) of non-circular gear is in non-circular, cause student when learning non-circular gear, it is difficult to understand for, grasps, skillfully use the change of the normal engaged transmission of non-circular gear and gear ratio, and gear ratio be actually how to change etc. problem, so, student, in the process of study non-circular gear drive ratio, not easily learns sturdy, thorough.
Name disclosed in Chinese patent 102705448A is called that " noncircular gear pair with fourier function pitch curve " proposes a kind of technical scheme calculating the motion of non-circular gear variable ratio. This noncircular gear pair employing actively non-circular gear is meshed with driven non-circular gear and forms the noncircular gear pair on I rank or high-order, so that actively the pitch curve of non-circular gear and driven non-circular gear is fourier function pitch curve, and calculate actively non-circular gear and driven non-circular gear fourier function pitch curve two kinds of formula of employing. Although its gear ratio can be calculated with reference to this kind of noncircular gear pair, but for begining to learn the student of non-circular gear drive ratio, it is difficult to understand for, grasps, skillfully use the change of the normal engaged transmission of non-circular gear and gear ratio, so, student is not easy to learn sturdy, thorough with reference to this kind of noncircular gear pair.
Although teaching aid can be strengthened the intuitive of teaching and increase knowledge density, difficult point can be broken through, improve learning interest, but owing to non-circular gear is in the process rotated, from the appearance the gear ratio not going out non-circular gear is by what mode to be calculated, so, it have been recognized that, non-circular gear drive is taught than only by language, if adopting teaching aid can cause the waste of educational resource.
Summary of the invention
It is an object of the invention to provide a kind of utilization and can be shown that the mode of non-circular gear rotating rule solves the teaching aid of the reflected non-circular gear drive ratio of learning difficulty problem.
The teaching aid of reflected non-circular gear drive ratio proposed by the invention includes casing or support, is separately installed with by the motor-driven driving shaft with active non-circular gear with the driven shaft of the driven non-circular gear being meshed with active non-circular gear on this casing or support; This teaching aid also includes dotted timer and is arranged on the circle wheel of driven shaft end, and this circle wheel is provided with the rope being connected with the paper tape on dotted timer. Described active non-circular gear and driven non-circular gear are constituted by elliptic gear or oval gear.
Described dotted timer has got orthoscopic spaced points on paper tape, utilizes the spacing of this spaced points to draw driven non-circular gear rotation speed change curve in panel.
The teaching aid of reflected non-circular gear drive ratio proposed by the invention is mainly by non-circular gear and motor, and dotted timer is constituted, so, the simple in construction of this kind of teaching aid, cost of manufacture is relatively low; Simultaneously because a pair gear does engaged transmission, driven non-circular gear is made to drive driven shaft speed-changing rotation while speed-changing rotation, so that can get, by driven shaft speed-changing rotation rule, the spaced points that spacing does not wait on the paper tape of dotted timer, so, each is plotted in the rectangular coordinate system of panel from value, just can learn the time dependent rule of spaced points, to reflect the gear ratio of non-circular gear.
Accompanying drawing illustrates:
Accompanying drawing 1 is the surface structure schematic diagram of one embodiment of teaching aid of reflected non-circular gear drive ratio proposed by the invention;
Accompanying drawing 2 Fig. 1 is got the schematic diagram of spaced points first embodiment on dotted timer paper tape;
Accompanying drawing 3 is got point that spaced points is plotted in panel from variation diagram with on paper tape in Fig. 2;
Accompanying drawing 4 Fig. 1 is got the schematic diagram of spaced points the second embodiment on dotted timer paper tape;
Accompanying drawing 5 is got point that spaced points is plotted in panel from variation diagram with on paper tape in Fig. 4.
Detailed description of the invention:
The surface structure schematic diagram of one embodiment of teaching aid of reflected non-circular gear drive ratio proposed by the invention is provided referring to Fig. 1, this figure. This teaching aid includes casing 1, is provided with driving shaft 2 and driven shaft 3 on casing 1 top, is provided with actively non-circular gear 4, and is provided with driven non-circular gear 5 on driven shaft 3, and actively non-circular gear 4 and driven non-circular gear 5 are meshed on driving shaft 2. One end of driving shaft 2 is connected with the output shaft of motor 6, when motor 6 rotates, driving shaft 2 can be driven to rotate. This teaching aid also includes dotted timer 7, and dotted timer 7 can be placed on casing 1, it is possible to place it in another position, provides dotted timer 7 and be placed on and leave casing 1 position in the present embodiment. The end of driven shaft 3 is provided with round wheel 8, and this circle wheel 8 is provided with rope 9, and the other end of rope 9 is connected with paper tape 10 end of dotted timer 7. When driving shaft 2 rotates, drive driven non-circular gear 5 to rotate by active non-circular gear 4, and driven non-circular gear 5 rotates and can drive circle wheel 8 rotation. Although driving shaft 2 is to be driven down by motor 6 at the uniform velocity to rotate, but speed-changing rotation made by driven non-circular gear 5, causing circle wheel 8 is not at the uniform velocity rotate, and dotted timer 7 beats round dot according to the non-uniform time of regulation on paper tape 10, so, the spaced points on paper tape 10 can be determined according to the velocity of rotation of circle wheel 8. Above-mentioned active non-circular gear 4 and driven non-circular gear 5 can adopt elliptic gear or oval gear.
Dotted timer 7(is provided referring to Fig. 1 referring to Fig. 2 and Fig. 3, Fig. 2 therein) on paper tape 10, got the schematic diagram of first embodiment of spaced points, Fig. 3 utilizes the Plotting data of spaced points on Fig. 2 tape loading 10 to put from variation diagram in panel. The spaced points on paper tape 10 provided in the present embodiment is to adopt elliptic gear by its extraction, and the elliptic gear parameter adopted is referring to table 1.
Table 1
| Modulusm | The number of teethz | Eccentricitye | Major semiaxisa | Semi-minor axisb | Focal lengthc |
| 2.5 | 27 | 0.3728 | 35 | 32.4769 | 13.0480 |
Dotted timer 7(is provided referring to Fig. 1 referring to Fig. 4 and Fig. 5, Fig. 4 therein) on paper tape 10, got the schematic diagram of second embodiment of spaced points, Fig. 5 utilizes the Plotting data of spaced points on Fig. 4 tape loading 10 to put from variation diagram in panel. The spaced points on paper tape 10 provided in the present embodiment is to adopt oval gear by its extraction, and the oval gear parameter adopted is referring to table 2.
Table 2
| Modulusm | The number of teethz | Eccentricitye | Major semiaxisa | Semi-minor axisb | Focal lengthc |
| 2.4 | 30 | 0.2442 | 35 | 33.9404 | 8.547 |
Claims (2)
1.The teaching aid of non-circular gear drive ratio can be reflected, it is characterized in that: this teaching aid includes casing or support, this casing or support are separately installed with by the motor-driven driving shaft with active non-circular gear with the driven shaft of the driven non-circular gear being meshed with active non-circular gear; This teaching aid also includes dotted timer and is arranged on the circle wheel of driven shaft end, this circle wheel is provided with the rope being connected with the paper tape on dotted timer, described active non-circular gear and driven non-circular gear and constitutes by elliptic gear or oval gear.
2.Teaching aid according to claim 1, it is characterised in that: described dotted timer has got orthoscopic spaced points on paper tape, utilizes the spacing of this spaced points to draw driven non-circular gear rotation speed change curve in panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722294.4A CN103745647B (en) | 2013-12-25 | 2013-12-25 | The teaching aid of non-circular gear drive ratio can be reflected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722294.4A CN103745647B (en) | 2013-12-25 | 2013-12-25 | The teaching aid of non-circular gear drive ratio can be reflected |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103745647A CN103745647A (en) | 2014-04-23 |
| CN103745647B true CN103745647B (en) | 2016-06-08 |
Family
ID=50502660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310722294.4A Active CN103745647B (en) | 2013-12-25 | 2013-12-25 | The teaching aid of non-circular gear drive ratio can be reflected |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103745647B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106151793B (en) * | 2016-08-29 | 2018-07-31 | 陈亮 | A kind of special shape gear transmission displaying device |
| CN113522212A (en) * | 2021-07-21 | 2021-10-22 | 山东大学 | Elliptical gear transmission variable speed stirring device and reaction kettle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10184852A (en) * | 1996-10-23 | 1998-07-14 | Showa Eng:Kk | Transmission device using deformed gear |
| US6022443A (en) * | 1994-01-25 | 2000-02-08 | Kimberly-Clark Worldwide, Inc. | Method and apparatus for placing discrete parts onto a moving web |
| CN2593293Y (en) * | 2002-11-29 | 2003-12-17 | 金福山 | Uniform linear motion tractor |
| CN201853395U (en) * | 2010-03-23 | 2011-06-01 | 王光军 | Three-dimensional experimental demonstration instrument of Newton's second law of motion |
| CN102179949A (en) * | 2011-03-09 | 2011-09-14 | 东莞华中科技大学制造工程研究院 | Non-circular gear transmission press and method for obtaining shape of non-circular gear nodal line |
| JP5164757B2 (en) * | 2008-09-12 | 2013-03-21 | 株式会社ハーモニック・ドライブ・システムズ | Finger joint drive mechanism of robot hand |
-
2013
- 2013-12-25 CN CN201310722294.4A patent/CN103745647B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6022443A (en) * | 1994-01-25 | 2000-02-08 | Kimberly-Clark Worldwide, Inc. | Method and apparatus for placing discrete parts onto a moving web |
| JPH10184852A (en) * | 1996-10-23 | 1998-07-14 | Showa Eng:Kk | Transmission device using deformed gear |
| CN2593293Y (en) * | 2002-11-29 | 2003-12-17 | 金福山 | Uniform linear motion tractor |
| JP5164757B2 (en) * | 2008-09-12 | 2013-03-21 | 株式会社ハーモニック・ドライブ・システムズ | Finger joint drive mechanism of robot hand |
| CN201853395U (en) * | 2010-03-23 | 2011-06-01 | 王光军 | Three-dimensional experimental demonstration instrument of Newton's second law of motion |
| CN102179949A (en) * | 2011-03-09 | 2011-09-14 | 东莞华中科技大学制造工程研究院 | Non-circular gear transmission press and method for obtaining shape of non-circular gear nodal line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103745647A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mamasoliyeva et al. | Analysis Of Reduced Vibration In Geared Mechanisms | |
| CN103971584B (en) | A kind of cam mechanism integrative demonstration teaching aid | |
| CN103745647B (en) | The teaching aid of non-circular gear drive ratio can be reflected | |
| CN202523298U (en) | Mapper for cam gear movement rules | |
| CN103943022B (en) | A kind of combined appliance for teaching for simulating reversal process | |
| CN203670445U (en) | Crossed helical gear transmission mechanism of double-pivot synchronous-linkage torsion pivot device | |
| US9753497B2 (en) | Electronic apparatus and connecting device | |
| CN104778875A (en) | English tense teaching device | |
| CN205726753U (en) | A kind of mobile terminal, hinge and power take-off module | |
| CN203812490U (en) | Teaching demonstration teaching aid for mechanical principle reversal method | |
| CN203441960U (en) | Double-shaft coaction torsion pivot device | |
| CN205226269U (en) | Have enough to meet need mechanism in succession | |
| CN104064104A (en) | Reversal method teaching tool of epicyclic gear train | |
| CN203706581U (en) | Teaching instrument for hole disc type variable-speed control mechanism of milling machine | |
| CN103956104A (en) | Goldberg mechanism | |
| CN203288204U (en) | Teaching publicity board | |
| CN104029545B (en) | A kind of two-dimentional automatic blackboard cleaning device | |
| CN205173446U (en) | Mechanism of torque pulse that elimination was produced by gear clearance | |
| CN204189371U (en) | A kind of cam mechanism displacement-profile generates demonstrator | |
| CN204732058U (en) | Planetary gear gear teaching aid | |
| CN203604590U (en) | Single-motor-driven double-stroke structure | |
| CN205881202U (en) | Be used for english teaching aid | |
| CN205423517U8 (en) | A kind of synchronism mechanism and use the equipment of this mechanism | |
| CN203670656U (en) | Cam intermittent speed change mechanism | |
| Rao et al. | Design, modeling and optimization of spur gear using finite element analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |