CN2042417U

CN2042417U - Ellipsograph

Info

Publication number: CN2042417U
Application number: CN 88217158
Authority: CN
Inventors: 那文绪
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-11-30
Filing date: 1988-11-30
Publication date: 1989-08-09

Abstract

The utility model relates to an ellipsograph, which is mainly composed of a fixing ruler, a movable ruler, a fixing shaft, a movable shaft, two pairs of transmission bevel gears, etc. When the movable shaft is revolved around the fixing shaft, the transmission bevel gears drive the movable shaft to autorotate at the speed which is twice of the revolution speed. The movable shaft drives a movable ruler which is fixed on the movable shaft to rotate, and a drawing pen of the end head of the movable ruler is rotated around the fixing shaft at once speed; meanwhile, the drawing pen of the end head of the movable ruler is rotated around the movable shaft at twice speed. When the drawing pen is rotated around the fixing shaft for one circle, and the trace of the drawing pen is an ellipse. The sum of the distance between the movable shaft and the fixing shaft and the distance between the drawing pen and the movable shaft is the length of the semimajor axis of the ellipse, and the difference of the distance between the movable shaft and the fixing shaft and the distance between the drawing pen and the movable shaft is the length of the semiminor axis of the ellipse.

Description

Ellipsograph

The utility model relates to the ellipsograph that uses in a kind of teaching and the production, belongs to drawing instrument.

Drawing ellipse at present, generally is to be tied to form circle with cord in the teaching, returns around two fixing points and circles, and the moving point trace on the rope is ellipse, if require mapping accurately, then adopts trace-point method.Size is wayward but the former maps, and latter's mapping is wasted time and energy.

The purpose of this utility model is to provide a kind of drawing accurate, easy to operate ellipsograph.

Ellipsograph of the present utility model comprises scale, moving chi, decides plate, slide plate, dead axle, moving axis, power transmission shaft, decides bevel gear, transmission bevel gear and fixed head.Be equipped with on the scale and decide plate and slide plate, decide plate and be fixed on scale one end, slide plate can also can be fastened on the scale by screw along the scale horizontal slip.Decide in the axle sleeve of plate bottom dead axle to be housed, dead axle and its axle sleeve are movingly, and be and orthogonal with scale, contacts with the awl den of blind hole axle sleeve on deciding plate with the top of its top simultaneously; In the axle sleeve of slide plate bottom moving axis is housed, moving axis and its axle sleeve movingly and orthogonal with scale are decided in the axle sleeve on plate and slide plate top power transmission shaft to be housed, and power transmission shaft and its axle sleeve are movingly, and be and parallel to each other with scale; Dead axle, moving axis and power transmission shaft are all in same plane.The dead axle upper end is fixed with decides bevel gear, the lower end is fixed with the female type fixed head of band pin, dead axle, decide not have relative motion between bevel gear and the fixed head, the moving axis upper end is fixed with moving bevel gear, the number of teeth of moving bevel gear is to decide half of the bevel gear number of teeth on the dead axle, the moving axis lower end is fixed with rod support, does not have relative motion between moving axis, moving bevel gear and the rod support.Moving chi with the moving axis intersect vertical axis is housed in the chute of rod support, and moving chi can slide along the chute of moving rod support, also can be fastened on the rod support by screw.Paintbrush is equipped with in moving chi termination.Be equipped with on the power transmission shaft two with dead axle on decide the identical moving bevel gear of the bevel gear number of teeth, one of them moving bevel gear is fixed on power transmission shaft one end and intermeshes with the bevel gear of deciding on the dead axle, another moving bevel gear and power transmission shaft are located with bearing pin, and can on power transmission shaft, slide, simultaneously with moving axis on moving bevel gear intermesh.When moving axis was positioned at the dead axle right side, two moving bevel gears on the power transmission shaft should be installed in the left side with the bevel gear of its engagement, decide also to be fixed with on the plate rotary handle coaxial with dead axle.During use, at first the fixed head of dead axle bottom is pricked and on paper or plank, ellipsograph is fixed, turn clockwise then and decide rotary handle on the plate, the rotary handle drive is decided plate, scale, slide plate, moving axis, power transmission shaft, rod support, moving chi and paintbrush and is rotated around dead axle, have only dead axle, decide bevel gear and fixed head maintains static.Like this, just make on the power transmission shaft and decide moving bevel gear that bevel gear meshes when dead axle clockwise rotates, produce clockwise rotation deciding to roll on the bevel gear, and, the moving bevel gear on the moving axis is rotated counterclockwise by another the moving bevel gear on power transmission shaft and the power transmission shaft.So, paintbrush on the moving chi with one times speed when dead axle clockwise rotates, also rotate counterclockwise with 2 times speed moving axle, when returning around dead axle when circling, two motions are synthetic, the gained track is ellipse, as long axis of ellipse equal the distance of moving axis and dead axle and moving axis and paintbrush apart from 2 times of sum, its minor axis equals 2 times of difference of the distance of the distance of moving axis and dead axle and moving axis and paintbrush.Slide plate on the movable scale can be adjusted the distance of moving axis and dead axle, and the moving chi in the mobile rod support can be adjusted the distance of paintbrush and moving axis, and adjustment finishes with screw that slide plate and moving chi is fastening, can make the ellipse of the work of asking.In order to make the ellipsograph stability of rotation, BOGEY WHEEL can be installed on scale.

The utility model has the advantages that easy and simple to handlely, it is accurate, time saving and energy saving to chart, and draws oval tens times of the effects that improve than trace-point method.Be design drawing department, big or middle universities and colleges drawing teaching and plumber, indispensable a kind of effective drafting instruments such as tinner, pincers worker.

Fig. 1 is the structural representation of ellipsograph of the present utility model, and among the figure: 1,10,22 moving bevel gears, 2,5,9,12,21,25 axle sleeves, 3 are decided plate, 4 rotary handles, 6 are decided bevel gear, 7 power transmission shafts, 8 scales, 11 screws, 13 slide plates, 14 BOGEY WHEELs, 15 paintbrushes, 16 moving chis, 17 rod supports, 18 screws, 19 moving axis, 20 bearing pins, 23 fixed heads, 24 dead axles, 26,27 bearing pins.

Fig. 2 is the A-A profile of Fig. 1: among the figure: 5 axle sleeves, 6 moving bevel gears, 24 dead axles, 25 axle sleeves, 27 bearing pins.

Fig. 3 is the B-B profile of Fig. 1, among the figure: 7 power transmission shafts, 9,12 axle sleeves, 10 moving bevel gears, 28,30 packing rings, 29 bearing pins.

Fig. 4 is the rearview of Fig. 1.O, A, B are respectively dead axle, moving axis and paintbrush center.

Fig. 5 is the paintbrush track schematic diagram of ellipsograph of the present utility model, and among the figure: a is that distance, the b of dead axle and moving axis is the distance of paintbrush and moving axis.

Embodiment:

Referring to Fig. 1～4, decide plate 3 and on scale 3, locate with groove, fix by screw.Decide to be welded with on the plate 3

vertical axle sleeve

5 and 25 and horizontal axle sleeve 2, dead axle 24 and

axle sleeve

5 and 25 movingly, top shape is processed on dead axle 24 tops, axle sleeve 5 is a blind hole, be the awl nest at the bottom of the hole, decide bevel gear 6 for 90 ° and be fixed on the dead axle 24 with bearing pin 27 and between axle sleeve 5 and 25.23 of fixed heads that have three pins are welded in dead axle 24 bottoms, slide plate 13 is located on scale 3 with groove, with scale 3 movingly, limit screw 11 is equipped with in its upper end, be welded with a vertical axle sleeve 20 and two horizontal axle sleeves 9 on the

slide plate

13,12, axle sleeve 9,12 is coaxial with axle sleeve 2, moving axis 19 and axle sleeve 21 are movingly, 90 ° of moving bevel gears 22 are fixed on moving axis 19 upper ends with bearing pin, 17 of rod supports are welded in moving axis 19 lower ends, are processed with the square hole with the intersect vertical axis of moving axis 19 on the rod support 17, and moving chi 16 is housed in the hole, moving chi 16 can slide in the square hole of rod support 17, also can be fixing by the trip bolt on the rod support 17 18, power transmission shaft 7 and axle sleeve 2,9 and 12 movingly, and its termination is fixed with 90 ° of moving bevel gears 1 with bearing pin, moving bevel gear 1 is positioned at decides bevel gear 6 left ends, two bevel gear engagements.Be processed with long keyway on the power transmission shaft 7,90 ° of moving bevel gears 10 and power transmission shaft 7 are movingly, and be contained between axle sleeve 9 and 12 with bearing pin 29 location, moving bevel gear 10, its axial location is fixed by axle sleeve 9 and 12, packing ring 28,30 can adjust the position of moving bevel gear 10, and moving bevel gear 10 is positioned at moving bevel gear 22 left ends, and two bevel gears are meshed.Decide also to be fixed with on the plate 3 rotary handle 4 coaxial with dead axle 24.An end relative with deciding plate 3 on the scale 3 is equipped with two BOGEY WHEELs 14.Be processed with cannelure on dead axle 24, moving axis 19 and the power transmission shaft 7, the

bearing pin

27,20 and 26 that is fixed on

axle sleeve

2,21 and 25 snaps in respectively in the cannelure of power transmission shaft 7, moving axis 19 and dead axle 24, limits its axial motion.

If moving chi 16 terminations are turned back 180 ° backward, form notch, paintbrush 15 is fixed on the position of turning back backward, when paintbrush 15 being adjusted to moving axis 19 when coaxial, but draw circles then.

Claims

1, a kind of ellipsograph, it is characterized in that comprising dead axle 24, moving axis 19, power transmission shaft 7, decide plate 3, slide plate 13, scale 3, moving chi 16, decide bevel gear 6 and moving bevel gear 1,10 and 22, dead axle 24 with decide on the plate 3 axle sleeve 5 and 25 movingly, point contacts at the bottom of the blind hole hole of moving axis 24 tops and axle sleeve 5, decide plate 3 and be fixed on scale 8 one ends, dead axle 24 is orthogonal with scale 8, axle sleeve 21 on moving axis 19 and the slide plate 13 movingly, slide plate 13 is contained on the blade of scale 8, can also can be fixed by screw 11 along scale 8 horizontal slips, moving axis 19 is orthogonal with scale 8, power transmission shaft 7 with decide axle sleeve 2 on the plate 3 and the axle sleeve 9 on the slide plate 13,12 movingly, and power transmission shaft 7 is parallel to each other with scale 8, and dead axle 24 moving axis 19 and power transmission shaft 7 are in same plane, be fixed on axle sleeve 25, bearing pin 26 on 21 and 2,20 and 27 snap in dead axle 24, cannelure on moving axis 9 and the power transmission shaft 7, to limit its axial motion, decide bevel gear 6 and moving bevel gear 1,10 the number of teeth is identical, and the number of teeth of moving bevel gear 22 is to decide half of bevel gear 6, decide bevel gear 6 and be fixed on the dead axle 24, and be meshed with the moving bevel gear 1 that is fixed on power transmission shaft 7 terminations.Moving bevel gear 10 and the power transmission shaft 7 that is processed with long keyway are movingly, and with bearing pin 29 location simultaneously and the moving bevel gear 22 on being fixed on moving axis 19 be meshed, when moving axis 19 is positioned at dead axle 24 right sides, moving bevel gear 1 and 10 is positioned at decides bevel gear 6 and moving bevel gear 22 left sides, moving chi 16 can slide in the guide bracket 17 that is fixed in moving axis 19 lower ends, also but the screw on the rod support 17 18 is fixing, moving chi 16 and 19 orthogonal intersecting of moving axis, there is paintbrush 15 moving chi 16 terminations, dead axle 24 lower ends are fixed with the fixed head 23 of band pin, decide to be fixed with on the plate 3 rotary handle 4 coaxial with dead axle 24.

2, ellipsograph according to claim 1 is characterized in that the other end of scale 3 is equipped with BOGEY WHEEL 14.

3, ellipsograph according to claim 1 and 2, turn back backward 180 ° and form notch in the termination that it is characterized in that moving chi 16, and paintbrush 15 is fixed on the termination of fold back portion.