CN2186668Y - Ellipse gauge - Google Patents

Abstract

The utility model relates to an ellipse gauge, which is composed of a rotating arm, a scribing arm and a gauge body, wherein, the rotating arm and the scribing arm are connected into a whole, and the gauge body is composed of a gauge disk and a positioning portion. The utility model is characterized in that two end faces of the gauge disk are provided with two mutually perpendicular slide ways; the positioning portion is provided with two crank type positioning pins; the rotating arm and the scribing arm are provided with a slide block shaft and slide blocks; two slide blocks are arranged in two slide ways of the gauge disk. After the positioning pins and a scribed object are positioned, slide blocks slide in two slide ways of the gauge disk by rotating a handle, and therefore, a chuck and a scribing pin on the scribing arm are driven to draw ellipses.

Description

Ellipse gauge

The utility model relates to a kind of ellipsograph.

This ellipsograph can be used in the drawing of oval and circle and the factory to the line of ellipse.

My No. 92102243.3 ellipsograph patents of invention, arm pull can not be realized rotation in 360 ° of scopes owing to be subjected to stopping of locating pin, therefore one-time positioning can not mark complete ellipse, ellipsograph must be advised body rotate 180 ° after the secondary location, just can mark complete ellipse.

The purpose of this utility model provides the ellipsograph that a kind of one-time positioning just can mark complete ellipse, it can use as drawing instrument, also can draw the specific purpose tool of various ellipses as router, plumber, the moulder of factory, also can learn simultaneously the presentation tool of elliptic equation as educational aid and middle school student.

Utility model is achieved in that the utility model comprises pivoted arm and arm pull, and two arms combine as a whole.The rule body is made up of rule disc portion and localization part, and the both ends of the surface of rule disc portion are provided with projection and are orthogonal two chutes.The hole that three dress locating pins are arranged on the localization part, locating pin B can be arbitrarily by putting near two holes of rule Pan Chu.Locating pin is the crank pattern and can rotates in three holes, is contained in the little axle on two locating pins, can keep advising body and be horizontal.Pivoted arm and arm pull are clamped the rule dish of rule body.The slide block axle respectively is housed on pivoted arm and the arm pull, on the slide block axle slide block is housed, two slide blocks are inserted respectively in two chutes of rule body.Chuck also is housed on the arm pull, scriber is housed in the chuck, also have straight trough on pivoted arm and the arm pull, slide block and chuck can be done the position adjustment in straight trough.All be carved with the scale of determining slide block axle and chuck adjustment amount on pivoted arm and the arm pull.When two locating pins are being drawn on the thing behind the location, turning handle, the slide block of inserting in the rule disc portion chute slides in the chute that enters separately, and arm pull is done stretching motion radially when rotating, mark ellipse thereby drive scriber.

It is a kind of simple in structure, easy to adjust that the utility model provides, and rotates once marking in week desirable (but not being similar to) the Ellipse tool.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is a front view of the present utility model.

Fig. 2 is a vertical view of the present utility model.

Fig. 3 is cutd open and the view that draws by A-A among Fig. 1.

Fig. 4 is a theoretical derivation graph of the present utility model.

Describe the concrete structure and the course of work that the utility model provides in detail below in conjunction with accompanying drawing.

The utility model comprises rule body (3), pivoted arm (2) and arm pull (11), and pivoted arm and arm pull combine as a whole.The rule body is made up of rule disc portion and localization part, and two parts of rule body can be whole, also can make up.Have two projections on the both ends of the surface of rule disc portion and be orthogonal chute.Two crank-type locating pins of A, B are housed in the hole of localization part, little axle (14) is housed on the locating pin, keep advising the horizontal level of body with it.Pivoted arm and arm pull are clamped the both ends of the surface of rule body.One straight trough is all arranged on pivoted arm and the arm pull, the slide block axle (6) and the chuck (5) of adjustable position is housed respectively in the groove.The slide block axle (10) of fixed position also is housed on the arm pull.Plane and stroke wall lower plane are carved with the scale of slide block axle (6) and the adjustment of chuck (5) position on the pivoted arm.Slide block axle (6) and slide block axle (10) then use nut (7) and (12) that itself and pivoted arm and arm pull is fastening respectively.Chuck is fastening with screw (4) and arm pull.Slide block (8) and slide block (9) are housed respectively on slide block axle (6) and the slide block axle (10), and two slide blocks directly go into to advise respectively in two chutes of body, and can slide along with the rotation of arm pull.Scriber (13) is housed in the hole of chuck (5).

At first mark the cross centre line of oval position during work, left major semiaxis center line slightly is longer than the L size among Fig. 1.Adjust the L on the ellipsograph then ₂And L ₃Size, L ₃=L ₂-L ₁In the formula: L ₁Be the semi-minor axis size of ellipse, L ₂Be the major semiaxis size.After size adjusting is good, arm pull is changed in the crank pit of A, B locating pin (Fig. 3 position), by the L size two locating pins are penetrated on the transverse center line, at this time Tuo Yuan center is determined.Press about 180 ° of Fig. 2 direction of arrow turning handles (between 90 °～270 °), promptly stop the rotation of handle, then two locating pins are rotated 180 °, continue turning handle in the direction of arrows subsequently, in arm pull changed the crank pit of locating pin once more over to, a complete ellipse had just been finished.

Do theoretical derivation the of the present utility model below in conjunction with Fig. 4, prove that the rule mark that C is ordered is oval.2 of A, B represent the position of two slide blocks at chute among the figure.Set up the XOY coordinate system, make C that point is in any position, and mark E, F angle, and G=E+F is arranged.

The coordinate that C is ordered:

X＝ABcosG＋BCcosG＝（AB＋BC）cosG

＝（AB＋BC）cos（E＋F） （1）

Y＝BCsinG＝BCsin（E＋F） （2）

Can get by (1), (2):

$\frac{X^2}{{(\mathrm{AB}+\mathrm{BC})}^2}={\cos }^2(E+F)---\left(3\right)$

$\frac{Y^2}{{\mathrm{<figure-callout\; id="2"\; label="BC"\; filenames="94209395X\_DRIMG1.png,94209395X\_DRIMG2.png"\; state="\{\{state\}\}">BC</figure-callout>}}^2}={\sin }^2(E+F)---\left(4\right)$

Get by (3), (4):

$\frac{X^2}{{(\mathrm{AB}+\mathrm{BC})}^2}+\frac{{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="94209395X\_DRIMG1.png,94209395X\_DRIMG2.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2}{{\mathrm{<figure-callout\; id="2"\; label="BC"\; filenames="94209395X\_DRIMG1.png,94209395X\_DRIMG2.png"\; state="\{\{state\}\}">BC</figure-callout>}}^2}={\sin }^2(E+F)+{\cos }^2(E+F)=1$

When AB ≠ 0, elliptic curve of this The Representation Equation.

When AB=0, when promptly two of ellipsograph slide block axle centers overlap, then can mark circle.

Claims (2)

1, a kind of ellipsograph, comprising rule body (3), pivoted arm (2) and arm pull (11), pivoted arm and arm pull join together, the rule body is made up of rule dish and location two parts, on two faces of rule disc portion two orthogonal chutes are arranged, two locating pin AB are housed on the localization part, pivoted arm and arm pull are clamped two planes of rule disc portion, slide block axle (6) is housed on the pivoted arm, slide block axle (10) and chuck (5) are housed on the arm pull, scriber (13) is housed in the chuck, slide block axle (6) and chuck (5) can be adjusted the position in the straight trough of pivoted arm (2) and arm pull (11), slide block (8) and slide block (9) are housed respectively on two slide block axles, two slide blocks are inserted respectively in two chutes of rule disc portion, two slide block axles and chuck are respectively by nut (7), (12) screw (4) is fastening with pivoted arm and arm pull, being characterised in that of the utility model, two locating pins that are contained in rule body localization part are crank structures, locating pin can be rotated in the hole of rule body localization part, arm pull can insert in the crank pit of locating pin, to rotate in 360 ° of scopes that realize arm pull, the little axle (14) that is used to keep advising the body horizontal level also is housed on the locating pin, after two locating pins on the rule body are drawn object localization with quilt, turning handle (1), two slide blocks just slide in the chute that enters separately, arm pull is then done radially flexible when rotating, thereby the scriber in the drive chuck marks ellipse, and when two slide block axle centers overlapped, what mark was round.

2, ellipsograph as claimed in claim 1 is characterized in that pivoted arm (2) and the scale that shows that slide block axle (6) and chuck (5) position are adjusted is arranged above the arm pull (11).

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