CN2128912Y - three-side square able to adjust angle for drafting - Google Patents

Abstract

The utility model relates to a three-side square able to adjust angle for drafting, which is a drawing tool that is similar to a set square; the utility model is characterized in that the three sides are respectively a single side ruler and a bilateral ruler whose included angle of the two ruler sides is a vertical angle; the size of the included angle between two rulers can be adjusted by winding a revolute pair according to graduation, and two ruler bodies are tightly clamped by a screw clamping structure. The orthogonally straight-lines of arbitrary slope angle which is difficult to be plotted by the set square can be plotted by the three-side square matched with a T-square; the three-side square able to adjust angle for drafting has the function of a plotter, and the price ratio of the utility model is lower than the plotter.

Description

three-side square able to adjust angle for drafting

The utility model is a kind of drawing instrument that is used to draw.

When set square and T-square were used, can draw horizontal inclination angle was the straight line at 15 degree times angles, and it is just very inconvenient to draw the straight line at other inclination angle.Past attempts had a kind of T-square, can adjust the angle of its blade to the chi head, just be used with set square like this and can draw the straight line that horizontal line is become arbitrary angle, but owing to adjust inconvenience, and making reasons such as drafting accuracy is too poor owing to blade length length causes in drawing course blade that the angle of chi head is walked about easily, present this T-square is eliminated and is difficult to see.Draw the straight line that horizontal line is become arbitrary angle with the drawing function, but the price of draught machine is very high.

The purpose of this utility model provides a kind of new drawing instrument, compare with set square, draw and be used with adjustable angle three limit chis and T-square or parallel rule etc., what can draw can draw with set square the time is 15 to spend some straight lines at times angles to horizontal inclination angle except that same, can also draw out reliably again easily and fast with what set square was difficult to draw horizontal line is become the non-15 various straight lines of spending the arbitrary angle at times angles.

The utility model is achieved in that shown in Fig. 1, Fig. 3 and Fig. 5 embodiment, in order to adjust angle, the three bar rule limits of drawing with adjustable angle three limit chis are divided into two members, a monolateral chi (1) and the one two bilateral chi (2) that chi limit angle is the right angle; For adjusting the corner dimension between monolateral chi and the bilateral chi on request, be shaped on or be equipped with a revolute pair at the overlapping of two chi bodies, be shaped on angle-differentiated line and finger value graticule on the two chi bodies respectively; For unclamp adjustment and the angle of adjusting is fixed up at every turn, be provided with the clamping structure that constitutes by screw, nut etc.

In order to form or install revolute pair etc., draw with can be between two chi bodies of adjustable angle three limit chis with concave surface, install mode such as plate additional in addition and form overlapping.For ease of making and save material, can be with reference to Fig. 1 and Fig. 2 and Fig. 3 and Fig. 4, at one of two chi bodies or on two chi bodies, be shaped on the flaggy of a place or several places projection respectively, enable to be overlapped in the corresponding site of another chi body.

For make some angle values commonly used (as 15 degree times angles) in repeating to adjust, transfer angle more consistent, the utility model can also be provided with between two chi bodies as Fig. 1 and Fig. 2 and Fig. 3 and calibration structure shown in Figure 4, by closely inlay, glue jail or be fixed in having the location convex closure or being welded with the Location resilient piece (3) of steel ball and a plurality of calibration of making of being fixed on another chi bodily form hole or the plane with preceding method constitute with the arc index plate (4) in hole or hole on chi bodily form hole or the plane with securing member.

For increasing and improve function, on drawing, can make some nibs as usefulness such as picture roughness symbols with adjustable angle three limit chis, can be shaped on scribe mark, can also utilize end, main scale limit or nib to make the auxiliary scale limit angled, be used to draw the short-term that becomes some angle with the main scale limit with the main scale limit.

Drawing with adjustable angle three limit chis is a kind of drawing instruments that are similar to set square, except that some purposes the same with set square, also mainly is to be used with the T-square of the parallel displaced position of energy or parallel rule etc., but has increased new drawing function when being used.For structure as shown in figures 1 and 3, on all multiposition that on abutting in as the T-square blade working edge of guide margin as sliding limit its three limits respectively, move, except that angle is adjusted at some rectilinear direction repetition of drawing under the situation of drawing 45 degree oblique lines or vertical curve, accent is at other arbitrary angle five kinds of family of straight lines that horizontal line become different angle that all can draw respectively, add that six kinds of family of straight lines altogether can draw with the T-square horizontal linear family of drawing.Horizontal line and vertical curve are orthogonal in these family of straight lines, and other four kinds of family of straight lines also become two pairs of mutually perpendicular straight lines, and are and horizontal line, also with the vertical curve symmetry.Like this, compare with set square, the utility model can be drawn the straight line that horizontal line is become arbitrary angle easily, thereby drawing, can draw the various oblique lines that become non-15 degree times angles with horizontal line when particularly drawing oblique view and on function, surpass set square, and can be used for measuring the size of the various angles that comprise non-15 degree times angles on the drawing with axonometric drawing; Compare with draught machine, on price, want cheap a lot, on function, draw and be used with adjustable angle three limit chis and T-square, at the straight line of drafting and horizontal line or vertical curve symmetry, as the outline line of cone, the teeth outline of tooth bar etc., and when needing the staggered main line segment of drawing basic view and oblique view, just can draw after once adjusting angle, and will be repeatedly or adjust the orthogonal straight line of two couples that could draw on symmetrical line and the both direction repeatedly with draught machine.The utility model and T-square are used, and can also just can draw orthogonal line segment on two to four figures that are symmetrical in horizontal line and vertical curve of any incline direction in once adjusting.The utility model also can be used with draught machine, or is used with adjustable angle three limit chis and T-square with two drawing, makes drawing more convenient.

Fig. 1, Fig. 3 and Fig. 5 are three specific embodiments of the present utility model.Fig. 2 and Fig. 4 are respectively the A-A cutaway views of Fig. 1 and Fig. 3.(1) is monolateral chi among the figure, (2) be bilateral chi, (3) be Location resilient piece, (4) are the arc index plate, and (5) are screw, (6) be nut, (7) be tapered sleeve, (8) are the axis of cone, and (9) are the centering nut, (10) be round nut, and on figure, drawn and adjusted angle-differentiated line and the finger value graticule that angle is used.During manufacturing, can on the limit on three main scale limits or several limits, make the length groove.

Fig. 1 and A-A cutaway view Fig. 2 thereof realize preferred embodiments of the present utility model.With two overlapping places of bilateral chi (2) revolute pair that is made of the tapered sleeve (7) and the axis of cone (8) is housed respectively at monolateral chi (1), with the clamping structure that constitutes by screw (5) and nut (6), from being prepared in the size that angle-differentiated line on the two chi bodies and finger value graticule can be read institute's hue angle.For make to some angle values commonly used in repeating to adjust, transfer angle more consistent, Location resilient piece (3) and arc index plate (4) are housed respectively on two chi bodies, constitute corresponding indexing mechanism.The bottom, hole of centering nut (9) is to go up the hole of the face of cylinder than precision-fit with the axis of cone (7), top is screw, make the axis of cone have good centering precision also can adjust the gap of revolute pair, with round nut (10) locking in strap wrenches hole, general furnishing does not have the gap or even certain elastic pressure state is arranged.

In the embodiment shown in Fig. 3 and A-A cutaway view Fig. 4 thereof, revolute pair and clamping structure are with the face of cylinder of pinching screw (5) and hole (cover can be inlayed in the hole) the formation revolute pair of the chi body that overlaps at the same overlapping of two chi bodies.The advantage of this embodiment is to have adjusted when drawing a pair of orthogonal oblique line need not change sliding limit, and the structure of Fig. 1 will change sliding limit sometimes; It is far away that shortcoming is that the guide margin of T-square is left in the drafting position of figure line, and be used to trace designs not as good as the sort of structure of Fig. 1 smoothly.

Revolute pair embodiment illustrated in fig. 5 is the same with Fig. 3 with clamping structure, and to go up that long bar rule be removable to drawn bilateral chi (2) on figure, and bilateral chi also can be made whole or all makes two bar rules removable during manufacturing.This structure can only be drawn a pair of orthogonal straight line after once adjusting.

Claims (3)

1, a kind of drawing has three bar rule limits with adjustable angle three limit chis, it is characterized in that the three bar rule limits of these three limit chis are divided into two members, a monolateral chi (1) and the one two bilateral chi (2) that chi limit angle is the right angle; Overlapping at two chi bodies has a revolute pair, and is shaped on angle-differentiated line and index line that angle numerical value is adjusted in indication on two chi bodies respectively; Be provided with two chi bodies are unclamped the clamping structure that is made of screw, nut etc. of adjusting and the angle of adjusting being fixed up.

2, the described drawing of claim 1 is characterized in that with adjustable angle three limit chis monolateral chi of its member (1) and bilateral chi (2) are shaped on the flaggy of projection and two chi physical efficiencys are overlapped each other at corresponding position with part on the chi body.

3, the described drawing of claim 1 is characterized in that being equipped with respectively Location resilient piece (3) and arc index plate (4) with adjustable angle three limit chis on its two chi bodies, thereby constitutes the calibration structure at some angle values commonly used (as 15 degree times angles).

Images