CN2181376Y

CN2181376Y - Multipurpose automatic centring graduated marking scale

Info

Publication number: CN2181376Y
Application number: CN 93225176
Authority: CN
Inventors: 胡继瀛; 胡逸峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-17
Filing date: 1993-02-17
Publication date: 1994-11-02
Anticipated expiration: 2003-02-17

Abstract

The utility model relates to a multipurpose automatic centring graduated marking scale, comprising a rhomboid (131) arranged on four chutes (141) which are arranged on a cross font (14). The four ends of the rhomboid are supported by clamp leg barrels (8), and are connected with a marking arm (11), an indexing label (12) and the cross font (14) by central posts (5) and a work needle (15) arranged on the long chute (111) of the marking arm (11). The utility model can be used for drawing a circle, equal division, punching and drawing a straight line, and graduation label are arranged on the scale. The utility model has the advantages of simple structure, easy fabrication, wide application range and convenient operation.

Description

Multipurpose automatic centring graduated marking scale

The utility model relates to a kind of mechanical processing and positioning instrument, specifically, is a kind of Position Scale that is used for boring of flange type part or tapping.

In mechanical cold working process, usually can run on " flange type " part the requirement of boring or tapping.To pound into beam piece at the part endoporus earlier by old traditional diamond-making technique, on beam, follow closely a fritter foil again, coat colored paint (as gentian violet gold lacquer liquid) again, and then find out the center of circle with method of geometry, be the center of circle with the iron compasses with the center of circle of finding out again, draw circle by drawing, on circle, carry out five equilibrium again, just find the orientation of boring at last.With the line of this technology is not only to require great effort but also bother, and the anchor point precision in the center of circle is relatively poor, is difficult to reach on the drawing requirement for concentricity.Obviously with old traditional method be fall behind very much, efficient is very low.

The purpose of this utility model provides a kind of can increasing work efficiency and craft precision many with self-centering calibration marking-out rules.

The utility model is conceived design according to parallelogram special type " rhombus " in the plane geometry.As everybody knows, rhombus also has the water chestnut limit to equate except all character with parallelogram; Each bar diagonal is divided one group of diagonal angle equally; Diagonal is orthogonal to be divided equally.As everyone knows, triangle has stability, and quadrangle does not then have stability.Please see Figure 8-1～Fig. 8-7, the water chestnut limit of setting rhombus here is a, from Fig. 8-1 as can be known, and diagonal AC=BD=

\sqrt{2a}

, ∠ A=∠ B=∠ C=∠ D, because unstability, so can change to Fig. 8-7 from Fig. 8-1.From Fig. 8-1～Fig. 8-4, the length that we see diagonal BD from

\sqrt{2a}

Change to maximum 2a, another diagonal AC then from

\sqrt{2a}

Change to is 0.And from Fig. 8-4～Fig. 8-7, diagonal AC changes to 2a from 0 again, and another diagonal BD then becomes 0 from 2a.Here emphasis is pointed out, exactly when figure constantly changes, its intersection point P is positioned at the symmetrical centre portion of figure all the time, i.e. PA=PC, and PB=PD is always so.

The utility model is conceived design according to the above-mentioned character of rhombus, that is: (1), vertically divide principle equally by diagonal and design cross body skeleton.The symmetrical centre circular hole (being intersection point P) that two groups of mutually perpendicular long chutes (being diagonal) and figure are arranged on the cross body; (2), four on isometric water chestnut limit, establish the long a that is; (3), center of circle marking-out rule and the operation needle excessively that have scale; (4), the line arm that has scale; (5), have the calibration label of scale and newel or the like.

Provided enforcement figure of the present utility model in sum.

Fig. 1-1 and Fig. 1-2 are respectively that master of the present utility model looks schematic diagram and schematic top plan view.

Fig. 2-1～Fig. 2-the 3rd, main body cross body schematic diagram of the present utility model.

Fig. 3 is a water chestnut of the present utility model limit schematic diagram.

Fig. 4-1 and Fig. 4 the-the 2nd, line arm schematic diagram of the present utility model.

Fig. 5 is a graduated scale sign intention of the present utility model.

Fig. 6-1, Fig. 6-2 and Fig. 6-3 are respectively scriber of the present utility model, the schematic diagram towards pin and circumference towards pin.

Fig. 7 is the center of circle marking-out rule schematic diagram of crossing of the present utility model.

Fig. 8-1～Fig. 8-the 7th, design principle key diagram of the present utility model.

Provide better embodiment of the utility model according to Fig. 1-1～Fig. 7.For the ease of understanding structure of the present utility model, we are earlier to the effect of each parts among Fig. 1-1 and Fig. 1-2 and interconnect and be described as follows:

Setscrew nut 1, because operation needle stand 16 is the threaded screws of blooming of hollow outer rim, after operation needle 15 was put into 16 of operation needles, fastening nut 1 can make operation needle 15 location;

Space washer 2 is annular thin slice packing rings, and pad can make the scriber location motionless by dog screw 3 on the centre bore 110 of line arm 11, and pine a bit can be rotated but do not understood play up and down slightly;

Dog screw 3 is fat capitiform screws, tightens to make line arm 11 location, and it is rotatable to unscrew back arm 11, can change marking-out rule 17 after back-outing;

Straight pin nut 4 is common thin nuts, and the card base tube 8 that is contained on the straight pin 7 is positioned on the straight pin 7, and this part can be replaced by shaft block ring;

Newel 5 is centres of location of the present utility model, is small-size shaft, is installed on the symmetrical centre axle of cross body 14, and line arm 11 and marking-out rule 17 can be installed in respectively and carry out work on the axle;

Setscrew nut 6 is that newel 5 is fixed on the cross body 11, available plain edition nut;

Straight pin 7 is common round pins, is the connector on water chestnut limit 13, with four straight pins 7 four water chestnut limits 13 is connected into a rhombus 131, and its underpart puts card base tube 8.Round pin post 7 its outer rims have a roll sleeve, and roll sleeve endoporus and outer rim are made matched in clearance with the chute 141 of straight pin 7 and cross body 14 respectively;

Card base tube 8 is mounted in the bottom and the location of straight pin 7, can be magnetic, and be benchmark with it during work contacts with workpiece 9 datum levels of ruling;

Workpiece 9 is line workpiece of supposition;

Circumference 10 is imaginary line circumference;

Line arm 11 is strips that an end has centre bore 110, on a side slat shape of centre bore 110, have elongated slot 111, the center line of elongated slot 111 is by the center line of centre bore 110, groove 111 dual-sides have the groove of expression length, operation needle 15 arrows are carved with in the place of crossing elongated slot 111 center lines in centre bore 110 outsides, the arm 11 of being convenient to rule is located when calibration, operation needle 15 is contained in 16 li of operation needle stands during use, and it can move freely in elongated slot 111, and screwed in place nut 1 is rule or dashed the some hole when moving on to the radius size that needs.Centre bore 110 is enclosed within on the newel 5, and dog screw 3 is twisted screw 3 by packing ring 2 can make arm 11 location;

Calibration label 12 is middle thin type annular elements that centre bore 120 is arranged, and in the annulus outer rim 360 ° scale is arranged, and label 12 is fixedlyed connected with cross body 14, keeps axialities (being concentricity) with cross body 14;

Water chestnut limit 13 is the thin parts of four strips, and there is isometrical circular hole 130 at two, connects to form a rhombus 131 with straight pin 7, and straight pin 7 extensions insert in the chute 141 of cross body 14, can be free to slide in chute 141.Can decide on workpiece 9 datum holes size in the slip change procedure, its symmetrical centre overlaps forever with the symmetrical centre of cross body 14 when changing;

Cross body 14 is cross thin type spares, there is a centre bore 140 for four chute 141 symmetries the centre, on four extend out long-armed, have four chutes 141, article four, the length of chute 141, width all equate, the center line of every chute 141 all passes through the center of circle of centre bore 140, the center line of two groups of chutes 141 is orthogonal, and centre bore 140 is installed on the newel 5;

Operation needle 15 requires at random to carry out branch punchings such as calibration facing to calibration label 12 according to drawing, and can impact circumference again in the center of impact.；

Operation needle stand 16 is hollow Exploded screws;

Marking-out rule 17 is thin bar shaped chis, and scale is arranged on it.

As follows according to Fig. 1-1 and Fig. 1-2 parts of the present utility model as can be known: the baseplane (one side that contacts with workpiece 9) of emphaticallying point out four ribs (chute outer rim) of cross body 14 here must plate magnetic material, can be in when line because magnetic and and the surface of workpiece 9 be pulled together.Certainly, also can inlay magnetic stripe at this place, in like manner the outer surface of card base tube 8 also should plate magnetic, when work the card base that magnetized can tightly be stuck on the endoporus of workpiece 9.Reached Reasonable Orientation completely according to three-point fix principle on the technology.

See also Fig. 6-1～Fig. 6-3, operation needle 15 comprises scriber 151, towards pin 152 and circumference towards pin 153.

The structure enforcement figure that provides according to Fig. 1-1 and Fig. 1-2 as can be known, when a certain workpiece 9 need line or etc. timesharing, two card base tubes 8 are drawn back in the endoporus of putting this workpiece 9 into, and as being stuck in tightly with the vernier caliper measurement endoporus on the inner hole wall of workpiece 9, at this moment the line of centres of two card base tubes 8 just must pass through the center of circle.Determined already on the structure of its tangible cross body 14 that intersection point P is positioned at the symmetrical centre of figure all the time.At this moment set up line arm 11, the dog screw 3 of screwing on after, set up scriber 151 or just can rule and punching according to the requirement of drawing towards pin 152.Certainly before line, at first to pacify according to the dimensional requirement of drawing and unscrew setscrew nut 1, because the operation hand rest 16 of present embodiment is a threaded screw of blooming of hollow outer rim, so the size that mixes up own needs by scale screwed in place nut 1 again.Can change arbitrarily towards pin 152 or circumference towards pin 153, require at random to carry out branch punching such as calibration etc. according to drawing facing to calibration label 12.Circumference can impact circumference again in the center of impact towards pin 153.

If streak the five equilibrium straight line in the center of circle, put marking-out rule 17(Fig. 7 as long as then back out dog screw 3), can in 360 ° scope, rule arbitrarily by any five equilibrium facing to calibration label 12.Say it be many be worthy of the name with self-centering calibration marking-out rule, say it many be it can draw justify, can five equilibrium, can punching, can draw straight line, and have scale that the calibration label is arranged on the chi.Do not resemble conventional method and will get size in addition.Say that its self-centering conforms with scientific theory especially, the P point is positioned at the symmetrical centre (seeing Fig. 8-1) of figure all the time as previously mentioned.Calibration label 12 and rule 17 are standards, so calibration and size are also just more accurate naturally.

From the above mentioned, the utility model has the advantages that: 1, simple in structure; 2, be convenient to make; 3, wide application, easy to use.

Claims

1, a kind of many with self-centering calibration marking-out rule, comprise setscrew nut (1), (6), straight pin nut (4) and dog screw (3), straight pin (7), it is characterized in that an end has a side in centre bore (110) and this hole that the line arm (11) of elongated slot (111) is arranged in addition, the calibration label (12) that centre bore (120) is arranged, symmetrical centre hole (140) is arranged and be that four of extending of symmetrical centre are long-armed and be positioned at the cross body (14) of the symmetrical chute (141) on long-armed with it, operation needle (15), operation needle stand (16), newel (5) and card base tube (8), and be linked with stomidium (130) by straight pin (7), length is the rhombus (131) that four water chestnut limits (13) of a form, and four chutes (141) that these four straight pins (7) insert cross body (14) respectively are spirally connected through card base tube (8) and straight pin nut (4) again; Newel (5) inserts the centre bore (120) of calibration label (12) successively and the back, symmetrical centre hole (140) of cross body (14) is spirally connected with straight pin nut (4); The centre bore (110) of line arm (11) is located by dog screw (3) after being placed in the top of newel (5); Operation needle stand (16) is nested with operation needle (15) its outer rim of back and setscrew nut (1) is spirally connected, and the elongated slot (111) of line arm (11) is passed in the bottom of operation needle (15).

According to the described marking-out rule of claim 1, it is characterized in that 2, line arm (11) can exchange with marking-out rule (17) by job requirements.

3,, it is characterized in that the baseplane of outer rim of four chutes (141) of cross body (14) is coated with magnetic material, or inlay magnetic stripe at this place according to the described marking-out rule of claim 1.

4,, it is characterized in that the outer surface of card base tube (8) is coated with magnetic material according to the described marking-out rule of claim 1.

5,, it is characterized in that the outer rim of calibration label (12) is carved with 360 ° of reticules according to the described marking-out rule of claim 1.

6, according to the described marking-out rule of claim 1, the center line of the elongated slot (111) of arm (11) that it is characterized in that ruling is by the center line of centre bore (110).

7, according to the described marking-out rule of claim 1, it is characterized in that its outer rim of round pin post (7) has a roll sleeve, roll sleeve endoporus and outer rim respectively and the chute (111) of straight pin (7) and cross body (14) make matched in clearance.

8, according to the described marking-out rule of claim 1, it is characterized in that operation needle (15) comprise scriber (151), towards pin (152) and circumference towards pin (153).