CN2380404Y - Ellipsograph - Google Patents
Ellipsograph Download PDFInfo
- Publication number
- CN2380404Y CN2380404Y CN 99207849 CN99207849U CN2380404Y CN 2380404 Y CN2380404 Y CN 2380404Y CN 99207849 CN99207849 CN 99207849 CN 99207849 U CN99207849 U CN 99207849U CN 2380404 Y CN2380404 Y CN 2380404Y
- Authority
- CN
- China
- Prior art keywords
- center
- bar
- gear
- fixing
- circle
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a pair of ellipse compasses, which is composed of a drawing rod, a gear of a fixing drawing rod, a central axis gear of an expansion and contraction rod, the expansion and contraction rod, a gear of a fixing central rod and the fixing central rod. An ellipse can be directly drawn up once by the utility model, use is quite accurate, and the utility model is an ideal tool for drawing workers, students and teachers' teaching.
Description
The utility model relates to a kind of Ellipsograph of drawing oval figure.Especially the Ellipsograph of oval figure can once directly draw.
At present, known use compasses are drawn oval, the ellipse that can not directly draw, and the ellipse that need just can draw in several steps of branch is difficult for grasping.
The purpose of this utility model is to provide this Ellipsograph to people, and its can accurately directly draw needed big ellipse and little ellipse is the ideal tools of the oval figure of picture.
The utility model mainly is made up of the Ellipsograph apparatus system.The Ellipsograph apparatus system is actually by drawing bar, fixing picture bar gear, shaft gear in the expansion link, expansion link, fixedly center of circle bar gear, fixedly center of circle bar formation.An end of drawing bar is fixing pencil, draw the bar axis and play flexible flecition, the picture bar other end fixedly picture bar gear is connected with expansion link one end axle, shaft gear is connected with the expansion link axle in the expansion link, the shaft gear two ends contact with fixing center of circle bar gear with fixing picture bar gear respectively in the expansion link, fixedly center of circle bar gear stretch into expansion link one end axle and fixedly center of circle bar fix.Wherein, fixedly the number of teeth of center of circle bar gear is Duoed one times than the fixing number of teeth of picture bar gear, and gear ratio is 2: 1.Like this, known minor axis radius size: with fixing center of circle bar gear centre is elliptical center, flexible crooked by drawing the bar axis, determines that picture bar one end pencil is a minor axis radius apart from fixing center of circle bar gear centre; Known major axis radius size: major axis radius deducts minor axis radius again divided by 2, flexible crooked by shaft gear in the expansion link, determine fixedly picture bar gear centre apart from fixing center of circle bar gear centre distance, draw bar one end pencil distance fixedly picture bar gear centre distance fixedly center of circle bar gear centre be major axis radius.Like this, a hand is pinned fixedly center of circle bar, and another hand-lifting animation bar one end pencil according to needed size, is drawn big ellipse and little ellipse, wide ellipse and narrow ellipse.
The utlity model has following advantage:
One, practical.Ellipsograph has small-sizedly, medium-sized, large-scale makes the drawing worker that closes, student and the teacher purposes of imparting knowledge to students.
Two, rational in infrastructure, be easy to make.
Concrete structure of the present utility model is proposed by following examples and accompanying drawing:
Accompanying drawing is the schematic diagram according to a kind of pattern that the utility model proposes the Ellipsograph that comes.
Describe details of the present utility model and operating position in detail below in conjunction with this figure:
Fig. 1 is a cross section of the present utility model structural map.
Fig. 2 is the vertical structural map of second embodiment.
Fig. 3 is the vertical structural map of the 3rd embodiment.
Fig. 4 is the vertical section structural map of the 4th embodiment.
Fig. 5 is the vertical section structural map of the 5th embodiment.
Among the figure 1, draw bar, 2, fixing picture bar gear, 3, shaft gear in the expansion link, 4, fixing center of circle bar gear, 5, expansion link, 6, fixing center of circle bar, 7, pencil, 8, picture bar axis.
In Fig. 1, draw bar (1) one end and be fixedly pencil (7), draw bar axis (8) and play flexible flecition, picture bar (1) other end fixedly picture bar gear (2) is connected with expansion link (5) one end axles, shaft gear in the expansion link (3) is connected to cooperate with expansion link (5) axle to be wanted closely, and gear rotates free, shaft gear in the expansion link (3) two ends contact with fixing center of circle bar gear (4) with fixing picture bar gear (3) respectively, and fixedly center of circle bar gear (4) stretches into expansion link (5) one end axles and fixedly center of circle bar (6) is fixing.Simultaneously, fixedly the number of teeth of center of circle bar gear (4) is Duoed one times than the fixing number of teeth of picture bar gear (2), and gear ratio is 2: 1.
In Fig. 2, draw bar (1) one end pencil (7) and fixedly center of circle bar gear (4) center and fixedly picture bar gear (2) center being aligned, determine that pencil (7) is the ellipse short shaft radius apart from fixing center of circle bar gear (4) center; A hand is pinned fixedly center of circle bar (6), moving pencil (7) one ends of another hand-lifting are drawn oval, when drawing shown in system 1/4 ellipse (as Fig. 3), pencil (7) and fixedly picture bar gear (2) center and fixedly center of circle bar gear (4) center being aligned, pencil (7) distance fixedly center of circle bar gear (4) center is the transverse radius.
In Fig. 4, known minor axis radius size: with fixing center of circle bar gear (4) center is elliptical center, flexible crooked by drawing bar axis (8), determines that picture bar (1) one end pencil (7) is the ellipse short shaft radius apart from fixing center of circle bar gear (4) center; Known major axis radius size: major axis radius deducts minor axis radius again divided by 2, and is flexible crooked by shaft gear in the expansion link (3), and definite fixedly picture bar gear (2) centre-to-centre spacing is center of circle bar gear (4) centre distance fixedly.Draw bar (1) one end pencil (7) apart from fixing picture bar gear (2) centre-to-centre spacing fixedly center of circle bar gear (4) center be the transverse radius.Shaft gear in the expansion link (3) cooperates with axle to be wanted closely, and the gear rotation is free, and a hand is pinned fixedly center of circle bar (6), and moving pencil (7) one ends of another hand-lifting are drawn oval.When drawing shown in system 1/4 ellipse (as Fig. 5), pencil (7) distance fixedly center of circle bar gear centre is the transverse radius.
Claims (2)
1. Ellipsograph, in overall structure, draw bar, fixing picture bar gear, shaft gear in the expansion link, expansion link, fixedly center of circle bar gear, fixedly center of circle bar is linked in sequence, it is characterized in that: known minor axis radius size: with fixing center of circle bar gear centre is elliptical center, flexible crooked by drawing the bar axis, determines that picture bar one end pencil is a minor axis radius apart from fixing center of circle bar gear centre; Known major axis radius size: major axis radius deducts minor axis radius again divided by 2, and is flexible crooked by expansion link axis gear shaft, and definite fixedly picture bar gear centre distance is center of circle bar gear centre distance fixedly.Draw bar one end pencil apart from fixing picture bar gear centre distance fixedly center of circle bar gear centre be major axis radius.A hand is pinned fixedly center of circle bar, and another hand-lifting animation bar one end pencil according to needed size, is drawn big ellipse and little ellipse, wide ellipse and narrow ellipse.
2. Ellipsograph according to claim 1 is characterized in that: fixedly the number of teeth of center of circle bar gear is Duoed one times than the fixing number of teeth of picture bar gear, and gear ratio is 2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207849 CN2380404Y (en) | 1999-04-14 | 1999-04-14 | Ellipsograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207849 CN2380404Y (en) | 1999-04-14 | 1999-04-14 | Ellipsograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2380404Y true CN2380404Y (en) | 2000-05-31 |
Family
ID=34001733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99207849 Expired - Fee Related CN2380404Y (en) | 1999-04-14 | 1999-04-14 | Ellipsograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2380404Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950326A (en) * | 2014-05-12 | 2014-07-30 | 华东理工大学 | Elliptic trammel |
| CN112373224A (en) * | 2020-11-30 | 2021-02-19 | 盛继玲 | Multifunctional drawing device |
-
1999
- 1999-04-14 CN CN 99207849 patent/CN2380404Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950326A (en) * | 2014-05-12 | 2014-07-30 | 华东理工大学 | Elliptic trammel |
| CN103950326B (en) * | 2014-05-12 | 2016-04-20 | 华东理工大学 | Ellipsograph |
| CN112373224A (en) * | 2020-11-30 | 2021-02-19 | 盛继玲 | Multifunctional drawing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |