CN87204140U

CN87204140U - Cross track ellipsograph

Info

Publication number: CN87204140U
Application number: CN 87204140
Authority: CN
Inventors: 陈伟明
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-04-18
Filing date: 1987-04-18
Publication date: 1987-10-21

Abstract

The utility model discloses a cross track ellipsograph for drawing ellipse, comprising a rotation cross arm, a drawing pen, a minor axis locating slide rod, a major axis locating slide rod, a rotation operating handle and a cross track frame. The distance of the locating slide rod and the drawing pen is adjusted to determine the dimension of the major axis and minor axis of an ellipse according to requirement. In addition, a dimension scale is designed on the rotation cross arm. Later, aiming the locating slide rod to a sliding groove of the cross track frame, and then a whole periphery track of the ellipse is drawn continuously. The utility model has the advantages of compact structure, high precision, simplicity and easy operation. The utility model is capable of drawing a series of ellipse according to requirement and is suitable for being used in production of drawing a drawing and drawing ellipse line in sheet metal worker's baiting process.

Description

Cross track ellipsograph

Although it is different to draw oval method at present, all is the track of obtaining the point that meets oval basic conception by all means.All be to utilize vertical mutually this characteristics of dividing equally of long axis of ellipse and minor axis.For example make ellipse in simple terms with method of altering course with a concentric circle, mark the cross hairs that long axis of ellipse and minor axis are orthogonal and divide equally exactly, utilize long, minor axis vertical line intersection point is the center of circle, draw two circles with half of major axis and minor axis length as radius, with straight line two circles are divided into some five equilibriums by the center of circle again, these hand over the some points of two circumference respectively with the straight line that two circles are divided into some equal portions, with bisector with make the parallel lines (being the vertical line of major axis) of minor axis for the intersection point of the great circle circumference of radius by half of long axis length, with bisector with make the parallel lines (being the vertical line of minor axis) of major axis for the intersection point of the roundlet circumference of radius by half of minor axis length, and make length, the respective parallel line of minor axis intersects, this intersection point then is the point on the elliptical orbit, connect each point with curve ruler, promptly obtain the ellipse of the work that requires.If the tracing point of obtaining is many more, then the ellipse that is linked to be of each point is just accurate more, but it is complicated to draw figure, and the drawing line is staggered serious, is difficult to identification, makes mistakes easily, and needs long with the time.Ellipse for plant produced need be used then marks ellipse with amplifying quadrat method earlier, and then in the steel plate loading and unloading, more bothers on sample paper.

The purpose of this utility model provides a kind of size of utilizing known transverse and minor axis, can directly once just mark the ellipsograph of required ellipse.

The utility model is finished with following mode: by having the rotation transverse arm of adjusting groove, being docile and obedient preface and being fastened on the bow pen, minor axis locating slide rod, major axis locating slide rod, rotating operation handle and the cross track frame that rotate on the transverse arm and forming.Minor axis locating slide rod, major axis locating slide rod and rotating operation handle all can carry out size adjusting along the adjustment groove shift position of rotating on the transverse arm.Rotate on the transverse arm and be carved with size scale.Cross track frame is that the travelling carriage by two mutually perpendicular across constitutes, and all has sliding guide groove on each travelling carriage, and vertical mutually.Cross track frame length be fix or can movable adjust, in order to be suitable for the needs of various sizes, when with the cross track frame of regular length, can make the cross track frame of a plurality of different lengths.The bow pen of ellipsograph is the metal bow pen of pencil, slate pencil or band needle point.

Fig. 1 is the front view of cross track ellipsograph line part.

Fig. 2 is the vertical view of cross track ellipsograph line part.

Fig. 3 is the cross track frame vertical view of cross track ellipsograph.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Cross track ellipsograph is made up of line part and cross track frame two large divisions.Have on rotation transverse arm (1) and adjust groove (4), bow pen (11), minor axis locating slide rod (3), major axis locating slide rod (2), rotating operation handle (6) are docile and obedient fastening being contained in of preface and are adjusted on the groove.Rotate on the transverse arm (1) and be carved with size scale (5).Bow pen is the metal bow pen (11) of band needle point, it is fastened on the position of rotating the size scale initial " 0 " on the transverse arm (1), and major axis locating slide rod (2) and minor axis locating slide rod (3) can be a round end or conical or a rotating bevel-type wheel with the guide groove contact position of cross track frame (7).Rotating operation handle (6) uses when being used to rotate ellipsograph, and it does not contact with cross track frame (7).When adopting the cross track frame (7) of regular length, in order to adapt to the needs of drawing normally used different size ellipse, is furnished with thirty word track frame (7), the use length dimension is 100 * 100 millimeters a cross track frame (7), can mark 100 millimeters of minimum minor axis dimension, major axis dimension is more than 300 millimeters, major axis and the minor axis length difference arbitrary ellipse in 100 millimeters scopes; Using length dimension is 75 * 75 millimeters cross track frame (7), can mark 75 millimeters of minimum minor axis dimension, and maximum major axis is more than 300 millimeters, the arbitrary ellipse of the difference of major axis and minor axis in 75 millimeters scopes; Using length dimension is 42 * 42 millimeters cross track frame (7), can mark 42 millimeters of minimum minor axis dimension, maximum major axis in 200 millimeters, the arbitrary ellipse of diaxon length difference in 42 millimeters scopes.If draw oval minor axis dimension below 42 millimeters, can make the cross track frame (7) of a length dimension as required with the ellipse short shaft size, can use and mark required ellipse.

Undertaken by following method in use: the at first definite oval long and short shaft length that will draw, going up at rotation transverse arm (1) is then adjusting in the groove (4) major axis locating slide rod (2) and minor axis locating slide rod (3) mobile, locate fasteningly by oval long and short shaft size respectively, can adopt the slide bar mode of screw commonly used, pad and band screw to be fastened on and rotate on the transverse arm (1).Rotating operation handle (6) is moved in adjusting groove (4), be fastened on the rotation transverse arm (1) after choosing the appropriate location.With cross track frame (7) alignment pieces (or drawing), make sliding guide groove (8) long with the ellipse on the workpiece (or drawing), minor axis overlaps, with hand (or hammering) four pilot pins (9) are pressed on the workpiece (or drawing), the rotation transverse arm (1) that regulates is placed on the cross track frame (7), make length, tip on minor axis slide bar (2) and (3) falls in the sliding guide groove (8), and the tip that makes major axis locating slide rod (2) is aimed on the track frame center (10), hand is taken rotating operation handle (6), rotate transverse arm (1) gently, make major axis slide bar (2) slowly leave cross track frame center (10), move to another guide groove with the vertical direction of minor axis locating slide rod low water, minor axis locating slide rod this moment (3) then moves to cross track frame center (10), the bow pen (11) that rotates transverse arm (1) end also begins to move, and, mark stitching to short-axis direction from the major axis summit.When minor axis locating slide rod (3) moved to cross track frame center (10), major axis locating slide rod (2) stopped to move, and bow pen (11) also just in time moves to the minor axis summit, stopped simultaneously moving.The stitching of the stroke of ruling this moment then is 1/4th ellipses.Use same quadrat method, can mark the ellipse of the work that requires.

The travelling carriage (12) of cross track frame (7) can be made the adjustment that can extend, as makes folding type or utilize the spill draw-in groove that movable part is connected with standing part, with lengthening travelling carriage length, is applicable to and draws a larger sized ellipse.

The utility model is simple in structure, and cost is low, and processing ease can mark required ellipse according to oval major and minor axis, and oval peripheral track is continuous, and degree of accuracy height is drawn between bowlder efficient and convenient. Draw oval figure when both can be used for charting, on steel board, directly mark required ellipse when can be used for again plumber's blanking.

Claims

1, a kind of cross track ellipsograph is characterized in that by having the rotation transverse arm (1) of adjusting groove (4), being docile and obedient preface and being fastened on the bow pen (11) that rotates on the transverse arm (1), minor axis locating slide rod (3), major axis locating slide rod (2), rotating operation handle (6) and being made up of two mutually perpendicular criss-cross travelling carriages (12) and the cross track frame (7) that has orthogonal sliding guide groove (8) thereon.

2, ellipsograph according to claim 1 is characterized in that minor axis locating slide rod (3), major axis locating slide rod (2) and rotating operation hand lever (6) all can carry out size adjusting along adjustment groove (4) shift position of rotating on the transverse arm (1).

3, ellipsograph according to claim 1 is characterized in that rotating and is carved with size scale (5) on the transverse arm (1).

4, ellipsograph according to claim 1 is characterized in that cross track frame (7) is that length regular length or two travelling carriages (12) can movablely be adjusted.

5, ellipsograph according to claim 1 is characterized in that bow pen (11) is the metal bow pen of pencil, slate pencil or band needle point.