CN2468759Y - Constant speed compass for drawing spirals - Google Patents
Constant speed compass for drawing spirals Download PDFInfo
- Publication number
- CN2468759Y CN2468759Y CN 01216425 CN01216425U CN2468759Y CN 2468759 Y CN2468759 Y CN 2468759Y CN 01216425 CN01216425 CN 01216425 CN 01216425 U CN01216425 U CN 01216425U CN 2468759 Y CN2468759 Y CN 2468759Y
- Authority
- CN
- China
- Prior art keywords
- constant velocity
- guide rod
- spring leaf
- jag
- diameter
- 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 non-circular curve drawing tool which consists of a variable-diameter wheel, a fork needle, a guide rod, a branch post, a glide block, a nut fixed on the glide block and a pull wire. The fork needle is arranged at the bottom of the variable wheel, one end of the guide rod is hinged with the fork needle while the other end fixes the branch post, the glide block is arranged on the guide rod that is provided with a pen holding hole, one end of the pull wire is connected with the glide block and the other end is connected with the adjusting bolt that matches the nut after crossing the variable-diameter wheel. The utility model has the advantages of simple structure and convenient and labor saving to be used and can to draw isovel spiral curve of different parameters, and therefore can be widely adopted in the field of teaching and engineering drawing.
Description
The utility model belongs to the drawing instrument field, relates to a kind of on-circular-curve-drawing instrument.
There is not to draw specially the drawing instrument of constant velocity spiral at present in the teaching, several dismountable instrument combination modes of many employings are drawn, though these instruments are except that drawing constant velocity spiral, can also draw other curve, but complex structure, inconvenience is slowly required great effort, used to the mapping process, preferably the requirement of adapt teaching and engineering drawing.
The utility model overcomes above-mentioned technical deficiency, provides a kind of being exclusively used in to draw constant velocity spiral and simple in structure, the quick labour-saving of mapping constant velocity spiral rule.
For achieving the above object, the utility model adopts following technical scheme: design a kind of constant velocity spiral rule, by diameter-changing wheel, jag acupuncture treatment, guide rod, terminal, slide block, be fixed on nut on the slide block, and draught line form, the fixedly jag acupuncture treatment of the bottom of diameter-changing wheel, guide rod one end and jag acupuncture treatment are hinged, the fixing terminal of the guide rod other end, slide block is set on the guide rod, offer on the slide block and carry a hole, one end and the slide block of draught line link, and are connected on the adjusting bolt that mates with nut behind an other end pile warp diameter-changing wheel and the terminal.
Diameter-changing wheel of the present utility model is made up of tapered core, the little axle of screw thread, tubaeform spring leaf, sheave piece and spring.The place, axle center of tapered core installs the little axle of screw thread, and the little axle of screw thread is gone up the tubaeform spring leaf of suit, and the big end of spring leaf is close to the outer wall of tapered core, offers groove on the conical surface of tapered core.The big end of tubaeform spring leaf is provided with projection, and groove protruding and on the tapered core cooperates.The big end fixed sheave piece of tubaeform spring leaf.The little axle of the upper end lower surface of tubaeform spring leaf and the screw thread between the tapered core upper surface is gone up pocketed springs.The jag acupuncture treatment is made up of main pin and secondary pin, and its secondary pin and main pin connect firmly, and the main pin of jag acupuncture treatment and an end of guide rod are hinged, and is fixed on the bottom centre place of diameter-changing wheel.
The utility model is simple in structure, and mapping is quick laborsaving, can require the different constant velocity spiral of rendering parameter according to teaching, can be widely used in fields such as teaching, engineering drawing.
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the structural representation of diameter-changing wheel among Fig. 1.
As shown in the figure: form diameter-changing wheel 9 by tapered core 16, the little axle 10 of screw thread, tubaeform spring leaf 13, sheave piece 14 and spring 12.One end of draught line 1 is fixed on the slide block 6, is fixed on the adjusting bolt 3 that mates with nut 2 behind an other end pile warp sheave piece 14 and the terminal 4.In order to prevent that diameter-changing wheel 9 from rotating, to fix in diameter-changing wheel 9 bottoms by main pin 8 and secondary pin 17 and connect firmly the jag acupuncture treatment of forming, the main pin 8 of jag acupuncture treatment is fixed on the tapered core 16, and the main pin 8 of an end of guide rod 5 and jag acupuncture treatment is hinged.Turn nut 11 clockwise, nut 11 moves down along the little axle of screw thread 10, because the projection on the spring leaf 13 cooperates with groove 15 on the tapered core 16, makes spring leaf 13 to move down and can not rotate.The sheave piece 14 that is fixed on the spring leaf 13 moves down synchronously. and the coil diameter that is wrapped in sheave piece 12 like this becomes big, and is big thereby the spacing of the constant velocity spiral of being drawn becomes.When the less constant velocity spiral spacing of needs, loose nut 11 under the elastic force effect of spring 12, move on the sheave piece 14, thereby coil diameter diminishes.Rotation adjusting bolt 3 can be adjusted the distance between jag acupuncture treatment 9 and the paintbrush 7, thereby can adjust the basic circle size of constant velocity spiral, but like this with regard to the different constant velocity spiral of rendering parameter.
When drawing constant velocity spiral, according to constant velocity spiral equation ρ=a θ, known a value in the equation, adjusting nut 11, making the coil diameter that is wrapped in sheave piece 14 is 2a, the main pin 8 of jag acupuncture treatment 9 is pricked the position location, stir guide rod 5, guide rod 5 rotates around main pin 8, slide block 6 slides at the pulling lower edge of draught line 1 guide rod 5, because paintbrush 7 is fixed together with slide block 6, so paintbrush 7 is along the certain movement orbiting motion, and trajectory is a constant velocity spiral.
Claims (7)
1. a constant velocity spiral is advised, it is characterized in that described compass for drawing spirals by diameter-changing wheel, jag acupuncture treatment, guide rod, terminal, slide block, be fixed on nut on the slide block, and draught line form, the fixedly jag acupuncture treatment of the bottom of diameter-changing wheel, guide rod one end and jag acupuncture treatment are hinged, the fixing terminal of the guide rod other end is provided with slide block on the guide rod, offer on the slide block and carry a hole, one end and the slide block of draught line link, and are connected on the adjusting bolt that mates with nut behind an other end pile warp diameter-changing wheel and the terminal.
2. constant velocity spiral according to claim 1 rule is characterized in that diameter-changing wheel is made up of tapered core, the little axle of screw thread, tubaeform spring leaf, sheave piece and spring.
3. constant velocity spiral rule according to claim 2 is characterized in that the place, axle center of tapered core installs the little axle of screw thread, and the little axle of screw thread is gone up the tubaeform spring leaf of suit, and the big end of spring leaf is close to the outer wall of tapered core, offers groove on the conical surface of tapered core.
4. according to claim 2 or 3 described constant velocity spiral rule, it is characterized in that the big end of tubaeform spring leaf is provided with projection, groove protruding and on the tapered core cooperates.
5. according to claim 3 or 4 described constant velocity spiral rule, it is characterized in that the big end fixed sheave piece of tubaeform spring leaf.
6. constant velocity spiral according to claim 2 is advised, and it is characterized in that the upper end lower surface and the last pocketed springs of the little axle of the screw thread between the tapered core upper surface of tubaeform spring leaf.
7. constant velocity spiral according to claim 1 rule is characterized in that the jag acupuncture treatment is made up of main pin and secondary pin, and its secondary pin and main pin connect firmly, and a main pin that jag is had an acupuncture treatment and an end of guide rod are hinged, and the bottom centre that is fixed on diameter-changing wheel locates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01216425 CN2468759Y (en) | 2001-02-23 | 2001-02-23 | Constant speed compass for drawing spirals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01216425 CN2468759Y (en) | 2001-02-23 | 2001-02-23 | Constant speed compass for drawing spirals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2468759Y true CN2468759Y (en) | 2002-01-02 |
Family
ID=33634839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01216425 Expired - Fee Related CN2468759Y (en) | 2001-02-23 | 2001-02-23 | Constant speed compass for drawing spirals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2468759Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985958A (en) * | 2015-06-25 | 2015-10-21 | 李守金 | Plotter for mathematic teaching |
| CN105856918A (en) * | 2016-05-26 | 2016-08-17 | 南京工业职业技术学院 | Variable-pitch demonstrating and spiral drawing instrument |
| CN106004179A (en) * | 2016-05-26 | 2016-10-12 | 南京工业职业技术学院 | Variable parameter cardioids demonstration and spiral line drawing instrument |
-
2001
- 2001-02-23 CN CN 01216425 patent/CN2468759Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985958A (en) * | 2015-06-25 | 2015-10-21 | 李守金 | Plotter for mathematic teaching |
| CN104985958B (en) * | 2015-06-25 | 2016-09-14 | 李守金 | A kind of mathematical education drawing apparatus |
| CN105856918A (en) * | 2016-05-26 | 2016-08-17 | 南京工业职业技术学院 | Variable-pitch demonstrating and spiral drawing instrument |
| CN106004179A (en) * | 2016-05-26 | 2016-10-12 | 南京工业职业技术学院 | Variable parameter cardioids demonstration and spiral line drawing instrument |
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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 |