CN87201959U

CN87201959U - Combined type center fixing scribing instrument

Info

Publication number: CN87201959U
Application number: CN 87201959
Authority: CN
Inventors: 孙雷
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-02-13
Filing date: 1987-02-13
Publication date: 1988-01-27

Abstract

The utility model relates to a combined type centering scribing instrument which is an instrument for scribing circles or circle arcs on work pieces. The combined type centering scribing instrument can rapidly determine the centre of gyration and scribe precisely lines for annular work pieces with major diameters. A scribing head of the combined type centering scribing instrument is connected with a center pole which is used as a gyration shaft of the scribing head and a gyration mechanism. The center pole is connected with a centering device which is used for fixing the direction of the center line of the center pole. The centering device is provided with at least three contact heads which are used for adjusting distance and are contacted with the fiducial surfaces of work pieces to be scribed to make the center pole of the combined type centering scribing instrument determine at a prospective position. The combined type centering scribing instrument with good versatility can be combined to form an appliance, such as a scribing instrument, a compass, a vernier caliper, a height vernier caliper, etc.

Description

Combined type center fixing scribing instrument

The utility model combined type centering lining instrument relates to a kind of accurate line instrument of drawing purposes such as circle, circular arc on workpiece.

For a long time, when on annular workpiece such as flange, ruling,, use conventional tool mostly for making the center of circle, being convenient to draw circle with compasses.Its scribble method is: clog wooden unit, lead or the like earlier in datum hole, proofread and correct the center of circle of finding out datum hole or benchmark cylindrical repeatedly with compasses again, and then draw circle.This crossed process is not only loaded down with trivial details but also time-consuming.When other situations, utilize the index dial line, but generally can only draw small workpiece; For large diameter workpiece, particularly the workpiece line of step arranged, its crossed process more loaded down with trivial details time-consuming, efficient is low and precision is not high, the line labor strength is big, easily makes mistakes.In addition, the precision of line often is subjected to the influence of workpiece error that processing occurs.In order to overcome the problems referred to above, some occur and improved the scoring tool of work efficiency, in any case but, also there are some different shortcomings in many improvement, for example those generally according to the homemade scoring tool of the various situations of user, they respectively have its advantage, but exist function singleness, versatility is poor, and centering machine is shortcoming such as heaviness comparatively, and the line of the many kinds of incompatibility, small lot, particularly large and medium-sized workpiece needs.

The purpose of this utility model provides that a kind of versatility is good, precision is high, the lining instrument of easy to use, easy batch process.

Combined type centering lining instrument of the present utility model, be that a kind of scribe head is around the combined scribing instrument of axis of rotation rotation to the workpiece line, it is characterized in that described scribe head is connected with a slew gear, slew gear includes a center-pole as the scribe head gyroaxis, this center-pole is connected with a centering machine that makes its center line determine direction, described centering machine includes at least three adjustable contacts, the contact point of this contact and line workpiece reference surface be positioned at the perpendicular same plane of the center line of above-mentioned center-pole on.

Adjust the centering machine of combined type centering lining instrument, its contact regulated is contacted with the reference surface of line workpiece, and utilize centering machine to determine the position of center line of this lining instrument slew gear center-pole rapidly, scribe head is rotated around the center line of the reference surface of line workpiece, thereby mark circle or circular arc line easily.Slew gear along the centerline direction slippage of its center-pole to the precalculated position, just can to the line workpiece not at grade step rule.

For large diameter workpiece, slew gear and centering machine can make up the access extension bar, guarantee enough radius of gyration and the necessary length dimension that can regulate contact of scribe head.

By changing difform location survey parts, the utility model can be combined into the line survey tool of different purposes.For example a kind of draw the step workpiece, the vernier line compasses of adjustable range arbitrarily; Perhaps a kind of energy measurement is not at the specific use slide measure of conplane a certain air line distance; Can also do height vernier calliper uses.

Combined type centering lining instrument of the present utility model has been simplified general loaded down with trivial details crossed process, has saved the line activity duration greatly; It has adopted the structural principle of general length meter tool, and universal components such as applied in any combination inside micrometer, slide measure neatly, low, the easy production in enormous quantities of its cost, and line precision height.

Below in conjunction with an embodiment of the present utility model and accompanying drawing thereof, the concrete structure of combined type centering lining instrument is described in detail.

Fig. 1 is the front view of combined type centering lining instrument;

Fig. 2 is the vertical view of the centering machine part of Fig. 1 lining instrument;

Fig. 3 is the schematic diagram that Fig. 1 lining instrument is combined as vernier line compasses;

Fig. 4 is the schematic diagram that is connected the special-purpose extension bar on the pivoted arm of slew gear;

Fig. 5 is a kind of structural representation of extension bar;

Fig. 6 is the structural representation that is enclosed within the center sub on the center-pole;

Fig. 7 is the structural representation that is enclosed within the vernier joint of special-purpose extension bar;

Fig. 8 is the structural representation that can be combined in the carbide alloy scribe head on vernier joint or the center-pole;

Fig. 9 is the structural representation that can be combined in the gage outfit on vernier joint or the center-pole;

The structural representation of Figure 10 claw that adopts when to be the centering machine contact with line excircle of workpiece reference surface contact;

Figure 11 is the schematic diagram that Fig. 1 lining instrument is combined as height vernier calliper.

See figures.1.and.2, a kind of combination has the centering lining instrument of vernier device and inside micrometer parts, and it is provided with a center-pole 1.Be with center-pole joint 2 on center-pole 1, the joint 2 that is enclosed within on the center-pole 1 can slide along center-pole 1 rotation or upper and lower translation.The below of center-pole joint 2 is equipped with spacing collar 19 and its trip bolt 20.Be connected with center-pole joint 2, pivoted arm 3, pivoted arm extension bar 4 and vernier device in the slew gear of scribe head 11, determine the radius of gyration of scribe head 11 around the center line rotation of center-pole 1 with them.Be provided with the vernier device that comprises that the posting 7, nut 8 and the connecting bolt 9 that indicate scale and the special-purpose extension bar 4 that is connected with pivoted arm 3, vernier joint 6 and inching gear constituted in this example.The top of vernier joint 6 is equipped with trip bolt 5, and the below of vernier joint 6 is connected with the scribing rod 10 that scribe head 11 is installed.

Shown in the Lower Half of Fig. 2 and Fig. 1, center-pole 1 becomes to removably connect with the centre bore of a tripod joint 21, on the periphery of tripod joint 21, be provided with three nipple orifice 30, one end of three extension bars 22 is installed in respectively in the nipple orifice 30, the other end of each extension bar is connected with the fixed sleeving of inside micrometer 26 and with locking device 23 lockings, the claw 15 that is connected with the microdrum 24 and the gage outfit 16 of inside micrometer is set in addition.The axis of three inside micrometers is positioned at the plane perpendicular with center-pole 1, and is evenly distributed by 120 ° of angles, as shown in Figure 2.

When using the tripod centering machine, adjust the length of each gage outfit 16 respectively, when the surface 33 of circle in the line benchmark of gage outfit 16 and workpiece 32 contacts and the reading of each micrometer when also identical, the center line of tripod joint 21 and center-pole 1 promptly with benchmark in the center line of circle coincide; If on tripod joint hole 30, connect the differentiated extension bar 22 of length respectively, promptly can make the center of circle in the misalignment benchmark of lining instrument and draw off-centre operation.Connected dihedral claw 15 and clamp nut 12 are set on gage outfit 16, and the extension edge of claw 15 is pressed close to mutually with the end face of workpiece 35, places restrictions on rocking of tripod centering machine.

When using lining instrument, the size positions adjustment of contact 16 is appropriate, center-pole 1 is promptly determined the central axis position in expection, then by the line requirement, adjust center sub spacing collar 19 and trip bolt 20 thereof, and the position of adjusting the vernier joint 6 of scribing rod 10 makes it meet the preliminary dimension requirement, tighten trip bolt 5, at this moment rotate pivoted arm 3, scribe head 11 promptly marks needed circle or circular arc on workpiece 32.

With reference to Fig. 3, a kind of combined cursor line compasses of the present utility model, the lower end of its center-pole 1 connects an awl point 31, distance between this awl point 31 and the scribe head 11 can be regulated arbitrarily, the different pivoted arm 3 of combination installation length just can make the radius of scribe head 11 have different length variations scopes.Suitably regulate spacing collar 19 and trip bolt thereof on the center-pole 1 by the shape of workpiece, determine the height of center-pole joint 2, above-mentioned vernier line this moment compasses can be to there being the workpiece line of step.

Scribe head 11, awl point 31 can adopt identical shape and structure, and in the time of the measuring jaw 55 that adopts as shown in Figure 9, above-mentioned vernier lining instrument can directly be measured the not air line distance on conplane workpiece.

With reference to Fig. 4, special-purpose extension bar 4 can be connected with pivoted arm 3, and its end is the end of thread 38 of band shoulder, and its shaft is marked with scale 37 and a long horizontal graduation mark 57.Vernier joint 6 matches with special-purpose extension bar 4, can read corresponding size reading.

With reference to Fig. 5, an end of extension bar 40 is ends of thread 38 of band shoulder, and the other end is the female end 39 of band shoulder.Extension bar 40 has multiple different length specification, and its length dimension can perhaps be determined by the measurement face at body of rod two ends by the decision of the steel quality pole length in the extension bar.

In use, extension bar 40 and pivoted arm 3, with centering machine extension bar 22 or with the extension bar of center-pole 1 all be general, can exchange.For example, choose a certain suitable length specification extension bar 40, combination is assemblied between pivoted arm 3 and the special-purpose extension bar 4, and lining instrument just can be to large diameter workpiece line.In addition, extension bar 40 can be replaced with the extension bar of normally used inside micrometer.

With reference to Fig. 6, the endoporus 42 that center-pole joint 2 has a cylindrical with center-pole 1 to be slidingly matched, with the vertical direction in this hole 42 on have the band shoulder screw 39 that matches with pivoted arm 3 ends of thread.The direction relative with screw 39 has the screw 44 that matches with trip bolt 38.

With reference to Fig. 7, the slew gear that is provided with on the center-pole 1 comprises a vernier device, and its vernier joint 6 constitutes slipping mechanism with special-purpose extension bar 4.The hole 46 of vernier joint 6 cooperates with the shaft of special-purpose extension bar 4, and vernier 45 matches with shaft scale 37, and the outer rim in hole 46 is established graduation mark 58 and matched with the horizontal graduation mark 57 of the length of shaft.

With the perpendicular direction of the axis in hole 46 on have the screw 47 of band shoulder, the screw 48 of trip bolt 5.Band shoulder screw 47 can match with scribing rod 10, scribe head 11 or other measuring jaw parts.When using lining instrument, the graduation mark 58 on horizontal graduation mark on the special-purpose extension bar 4 57 and the vernier joint 6 is aligned, make scribing rod 10 and center-pole 1 keeping parallelism.

The screw 49 that one side of vernier joint 6 has the bolt 9 with inching gear to match.

With reference to Fig. 8 and Fig. 9,, comprise carbide alloy scribe head 50 and measuring jaw 55 with center-

pole

1 or 10 one-tenth location survey sub-assemblies that removably connect of scribing rod.Scribe head 55 studs with carbide alloy awl point 51, and has the link of a band shoulder 52 and screw thread 53, as shown in Figure 8.Measuring jaw 55 is provided with cylindrical measuring jaw 56, and has the link of a band shoulder 52 and screw thread 53.

With reference to Figure 10, lining instrument is from the cylindrical reference surface 34 centering line of workpiece 32, adopts step jaw 14 and the clamp nut 12 thereof combined with gage outfit 16.Suitably regulate their position, the extension edge of claw 14 contacts with the cylindrical 34 of workpiece 32, the adjacent side of extension edge and the end face 35 of workpiece 32 are pressed close to, thus the fixed position of the expection of true lining instrument center-pole 1.

With reference to Figure 11, the slew gear of scribe head 11 is directly installed on the tripod joint 21, this example just is combined into height vernier calliper, and at this moment, scribe head 11 can be done accurate line and use.Scribe head 11 is replaced by measuring jaw shown in Figure 9 55, and this example just can be used as normally used height vernier calliper and uses.

Claims

1, a kind of combined scribing instrument of around the centre of gyration rotation workpiece being rule by scribe head is characterized in that:

A) described scribe head [11] is connected with a slew gear,

B) slew gear and the center-pole [1] as scribe head [11] gyroaxis are slidingly matched,

C) center-pole [1] is connected with a centering machine that makes its center line determine direction,

D) centering machine is provided with at least three adjustable contacts [16], the contact of contact [16] and described workpiece [32] line reference surface be positioned at the perpendicular same plane of the axis of center-pole [1] on.

2, combined scribing instrument as claimed in claim 1 is characterized in that the slew gear of described scribe head ［ 11 ］ comprising: being enclosed within can slippage and the center-pole joint ［ 2 ］, a pivoted arm ［ 3 ］ that is connected with this center-pole joint ［ 2 ］ and the vernier device that is connected with this pivoted arm ［ 3 ］ and scribe head ［ 11 ］ that rotate around center-pole ［ 1 ］ on the center-pole ［ 1 ］.

3, combined scribing instrument as claimed in claim 2 is characterized in that an end of described center-pole ［ 1 ］ is connected with the tripod joint ［ 21 ］ of a tripod centering machine.

4, combined scribing instrument as claimed in claim 3 is characterized in that described tripod centering machine is provided with three gage outfit ［ 16 ］ and connected micrometer parts ［ 16,24,26 ］ and locator card tines ［ 14,15 ］ that contact with the line reference surface of line workpiece ［ 32 ］.

5, combined scribing instrument as claimed in claim 1 or 2, the end setting that it is characterized in that described center-pole ［ 1 ］ becomes dismountable screw connection structure with location survey parts ［ 21,31,50,55 ］, and the vernier device of described scribe head ［ 11 ］ becomes dismountable screw connection structure with line measurement component ［ 11,31,50,55 ］.