CN2089610U

CN2089610U - Multifunctional measuring instrument

Info

Publication number: CN2089610U
Application number: CN 91214189
Authority: CN
Inventors: 曾明昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-20
Filing date: 1991-02-20
Publication date: 1991-11-27

Abstract

The utility model discloses a multifunctional measuring instrument which is composed of a shaft sleeve, a conicity shaft, a flaky measuring head, a round-shaped spring, a spiral spring, locking nuts and a measuring dial. The conicity shaft is used for replacing a tapered thread shaft. The utility model has the advantages of simple structure and low cost. The multifunctional measuring instrument can exactly measure straight holes, taper holes, the effective diameters of thread holes, etc.

Description

Multifunctional measuring instrument

The utility model relates to a kind of multifunctional measuring tool that uses mechanical means measure linear size, is the measurer that is applicable to footpath in the demanding straight hole of measuring accuracy, taper hole, the threaded hole.

In the known technology, measurers such as the internal diameter three-jaw milscale, feeler gauge of special purpose are generally used in the measurement of hole internal diameter.Chinese patent CN85204309 discloses a kind of axle and measuring head by band V-arrangement skewed slot, measurement φ 18～φ 80 size section that nut constitutes meet national standard (the combination feeler gauge in the hole of all precision of all deviations (A-Z) in hole of GB1801～1804-79), because the every combination of relative position of (1) its skewed slot and measurement piece once with regard to the palpus calibrating once, hole to different accuracy, need different combinations, use inconvenient, what (2) adopt is the method that compares and measures, to some high-precision holes, whether can only judge qualified, how much can not measure error, use is restricted.Chinese patent CN86202329 discloses a kind of tapering of taper hole and dried chi that divides of taper hole of diameter measured, it is increase to survey ring, core bar, screw and constitute on internal diameter three-jaw milscale, utilize the measurement of the principle realization of taper hole diameter, length and tapering mutual relationship to taper hole, but have following deficiency: (1) measuring accuracy is low.Survey and encircle when length is regulated in slippage on core bar, the distance of surveying between ring and the measuring jaw will produce error, screw rod rotates in threaded sleeve, the turriform Archimedean screw body (being cone) of screw rod one end promotes it and is distributed in three measuring jaws on every side when radial direction moves, the error of tapered tread will be reflected as the measuring error of outside diameter, because taper value is by big end, end diameter and length determine jointly, therefore error in length and big end error will influence the measuring error of tapering, and the error of tapered tread has taper error, pitch error, middle footpath error, angle of thread error etc.(2) requirement of the element precision of turriform Archimedean screw body is very high, and manufacture difficulty is big, the cost height.(3) the tapered tread contact area is little, and is not wear-resistant, and serviceable life is short.(4) usable range is less.

Its purpose of the utility model is intended to overcome above-mentioned deficiency of the prior art and a kind of measuring accuracy height, multifunctional measuring tool that cost is low is provided, and can carry out in straight hole, taper hole, the threaded hole footpath exactly and measure.

Technical solution of the present utility model is a kind of multifunctional measuring tool, comprise axle sleeve 1, connect and be positioned at 2～3 sheet measuring heads, screw rod in the axle sleeve 1 with coil spring 4, its feature part is that screw rod is the tapering axle 2 that scale mark is arranged, measuring head contact tapering axle 2 one ends have the tapering consistent with tapering axle 2, comprise also that an end face has scale mark, the other end and axle sleeve 1 thread connection or with the set nut 6 of screw attachment, inner and tapering axle 2 thread connection, volute spring 5, volute spring 5 is between axle sleeve 1 and tapering axle 2.

The tapering of the tapering axle 2 in the utility model technical solution is 1:5～1:20.

Measuring head in the utility model technical solution is 3 identical measuring heads 3, T-shaped or l shape.

Measuring head in the utility model technical solution can also be 3 identical measuring heads 8, and the end that measuring head 8 does not contact tapering axle 2 is that axial cross section is the circular arc of R3～6mm.

Thread connection or measuring disk 7 is arranged on the set nut 6 in the utility model technical solution, the axial cross section of measuring disk 7 circular arc consistent that is R with measuring head 8 with screw attachment.Measuring disk 7 can have all size, selects for use as required.

Measuring head in the utility model technical solution can also be measuring

head

9 and 10, and tapering axle 2 one ends that do not contact of measuring head 9 are taper shape, and tapering axle 2 one ends that do not contact of measuring head 10 are V-shaped groove, and both are angle of thread at angle.

The utility model has following characteristics compared to existing technology:

1, measuring head is bigger than the contact area of measuring head and tapered tread (being the turriform spiral of Archimedes) with the contact area of tapering axle, thereby wear-resisting, long service life;

2, the tapering axle is easy to manufacture, cost is low, and taper error is little, measuring accuracy is high;

3, save microdrum, reduced part and processing technology, reduced cost;

4, simple in structure, one-object-many-purposes can be used for measurements such as straight hole, taper hole, threaded hole, and mass runoff instrument in can doing (initiatively measuring) can be made feeler gauge (passive detection) again;

5, each size only needs one (reading measurement) or two (comparing and measuring) the utility model, just can measure the part of multiple precision and multiple dimensional discrepancy, has significantly reduced the description and the quantity of measurer.For example φ 12H7, φ 12H8, φ 12K8, φ 12G8, φ 12H9, and for example M10-6H, M10-6G, M10-6F, M10-7E all only need one pair of (or two pairs) measurer of the present utility model.

Fig. 1 is the utility model embodiment 1 structural representation;

Fig. 2 is the B-B cut-open view of Fig. 1;

Fig. 3 is an I part enlarged drawing among Fig. 2;

Fig. 4 is the right view of Fig. 1;

Fig. 5 is the A-A cut-open view of Fig. 4;

Fig. 6 is the utility model embodiment 2 structural representations;

Fig. 7 is the utility model embodiment 3 structural representations;

Fig. 8 is a C-C enlarged drawing among Fig. 7;

Fig. 9 is a D-D enlarged drawing among Fig. 7.

Among the figure: 1～axle sleeve, 2～tapering axle, 3～measuring head, 4～coil spring, 5～volute spring, 6～set nut, 7～measuring disk, 8～measuring head, 9～measuring head, 10～measuring head.

The utility model is further described by embodiment below in conjunction with accompanying drawing:

Embodiment 1: referring to Fig. 1-5.A kind of multifunctional measuring tool of measuring the straight hole aperture is by axle sleeve 1, be made up of 2,3 T shape sheets of tapering axle measuring head 3, coil spring 4, volute spring 5, the set nut 6 of scale mark; The tapering of measuring head 3 and tapering axle 2 contacts one end and the tapering of tapering axle 2 are consistent, the other end can reliably contact with tested part, there is a perforation at the middle part, and coil spring 4 connects 3 measuring heads 3 and is positioned on the axle sleeve 1 in three equally distributed gathering sills perpendicular to axis through perforation; On set nut 6 one end faces scale mark is arranged, the other end and axle sleeve 1 thread connection.During tranquility, coil spring 4 is pushed measuring head to tapering axle 2, when tapering axle 2 is mobile in axle sleeve 1, measuring head 3 will radially stretch, set up relation one to one between the circle footpath size that such 3 measuring heads 3 are formed and the relative position of axle sleeve 1 and tapering axle 2, according to the mike principle,, can calculate axial displacement and 3 circle footpath sizes that measuring head is formed by the groove on set nut 6 and the tapering axle 2.Groove on the tapering axle is represented the axial displacement of tapering axle, every lattice 0.5mm, groove on the set nut is represented the angle of rotating, if the thread pitch that the tapering axle cooperates with set nut is 0.5mm, groove on the set nut is 50 five equilibriums, and taper value is 1:5, if the reading on the tapering axle is 5mm, reading on the corresponding nut is 15, and then axial displacement is:

S＝5＋（0.5／50）×15＝5.15（mm）

The circle footpath is of a size of D=D.+(K/2) * S=D.+(1:5/2) * 5.15=D.+0.515

In the formula: D. is the circle footpath size (during manufacturing fixed known number) of the reading on tapering axle and the set nut when being zero.

Measuring accuracy.Tapering axle 2 turns clockwise, tapering axle 2 moves to left, and 3 measuring heads 3 are ejected, and the circle footpath increases, △ D=(K/2) * △ S, △ D in the formula---circle footpath variable quantity, K---taper value, △ S---the displacement error of tapering axle, when 2 counter rotations of tapering axle, the tapering axle moves to right, and 3 measuring heads 3 radially shrink, and calculates the same.Because K/2≤1/10, thus △ D＜＜△ S, and △ S minimum is 1/100mm, so the I of △ D reaches 1/1000mm.

When the adjusting reading is a certain size, can be used as feeler gauge pore size more to be measured.

Embodiment 2: referring to Fig. 6.A kind of multifunctional measuring tool of measuring taper hole aperture and tapering, 3 measuring heads 3 have been replaced with 3 measuring heads 8, measuring head 8 contacts an end with measured piece axial cross section is the circular arc of R3～R6mm, measuring disk 7 of thread connection on the set nut 6 (or using screw attachment), the axial cross section of measuring disk 7 is the circular arc consistent with measuring head 8, and as required, measuring disk 7 can be selected all size for use, other is with embodiment 1, slightly.According to the trigonometric function relation, can calculate tapering.Change bigger measuring disk again, the end face of measuring disk is contacted with the taper hole end face, can measure the aperture.

Measuring accuracy.According to K=(D-d)/L, in the formula, K-taper value, the diameter of D-measuring disk 7, d-circle footpath size, the distance of L-measuring head 8 and measuring disk 7.Cone angle=the 2arctg of tapering ((D-d)/and 2L), because D, L are certain, so (d α)/(d(d))=-

\frac{1}{1 + {(\frac{D - d}{2 L})}^{2}}

, then d α=-

D(d), because

＜1, so | d α |＜| d(d) |, promptly | △ α |＜| △ d|, that is cone angle variable quantity △ α (radian) is less than circle footpath variable quantity △ d(mm), be converted into angle, △ α=180 ° △ d/ π because △ d minimum is 1/1000mm, so △ α min＜(60/1000) ° be △ α min＜(36/10) ' less than 4 '.

Can calculate the taper hole aperture according to φ=d+E again, φ one tested taper hole outside diameter in the formula, d-circle footpath size, E-measures constant.E＝2（L－R）tgα／2＋Rtgα／2Sinα／2。L-is the distance between measuring disk in the formula, and R-is the arc radius of measuring disk, α-and be cone angle.

△φ＝△d＋△E。Because △ E is very little, can ignore with respect to △ d, so △ φ ≈ △ d, then △ φ min ≈ △ dmin=1/1000mm.

Embodiment 3, referring to Fig. 7～9.A kind of multifunctional measuring tool of measuring footpath in the internal thread, replace 3 measuring heads 3 with 2 measuring heads (9 and 10), coil spring 4 connects measuring head 9 and measuring head 10 and is positioned on the axle sleeve 1 in the gathering sill perpendicular to 2 symmetrical distributions of axis through the measuring head perforation; Contact an end with measured piece, the taper shape that is shaped as of measuring head 9 matches with the internal thread trough, and measuring head 10 is for V-shaped groove and internal thread crest match, and the angle of measuring head 9 and measuring head 10 is the form of thread angle, and other is with embodiment 1, slightly.Can measure and calculate in the internal thread according to the flexible of measuring head through size.

The utility model is not limited to the foregoing description, and the utility model content is described all can be implemented.

Claims

1, a kind of multifunctional measuring tool, comprise axle sleeve 1, connect and be positioned at 2～3 sheet measuring heads, screw rod in the axle sleeve 1 with coil spring 4, it is characterized in that screw rod is the tapering axle 2 that scale mark is arranged, measuring head contact tapering axle 2 one ends have the tapering consistent with tapering axle 2, comprise also that an end face has scale mark, the other end and axle sleeve 1 thread connection or with the set nut 6 of screw attachment, inner and tapering axle 2 thread connection, volute spring 5.

2, by the described multifunctional measuring tool of claim 1, it is characterized in that the tapering of tapering axle 2 is: 1:5～1:20.

3, by claim 1 or 2 described multifunctional measuring tools, it is characterized in that measuring head is 3 identical measuring heads 3, T-shaped or l shape.

4, by claim 1 or 2 described multifunctional measuring tools, it is characterized in that measuring head is 3 identical measuring heads 8, the end that measuring head 8 does not contact tapering axle 2 is that axial cross section is the circular arc of R3～6mm.

5,, it is characterized in that on the set nut 6 thread connection or measuring disk 7 is arranged, the axial cross section of measuring disk 7 circular arc consistent that is R with measuring head 8 with screw attachment by the described multifunctional measuring tool of claim 4.

6, by the described multifunctional measuring tool of claim 5, it is characterized in that measuring disk 7 has all size.

7, by claim 1 or 2 described multifunctional measuring tools, it is characterized in that measuring head is measuring head 9 and 10, do not contact tapering axle 2 one ends, measuring head 9 is that taper shape, measuring head 10 are V-shaped groove, and both are angle of thread at angle.