CN102749014B

CN102749014B - Tolerance inspection caliper rule

Info

Publication number: CN102749014B
Application number: CN201210225847.0A
Authority: CN
Inventors: 周荣; 征茂德; 谌清平; 吴魏
Original assignee: Suzhou Luzhiyao Technology Co Ltd
Current assignee: Suzhou Luzhiyao Technology Co Ltd
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2014-07-23
Anticipated expiration: 2032-07-03
Also published as: CN102749014A

Abstract

The invention relates to a tolerance inspection caliper, comprising a ruler, the ruler is provided with a fixed end, a sliding seat and a fixed sleeve, the fixed end is a ruler rod body with main scales and vernier scales engraved on both sides, the sliding The seat cover is on the fixed end of the main scale, which is similar or equal to the structure of a standard vernier caliper with a dial that can slide. The fixed sleeve is set on the fixed end of the vernier scale. The fixed sleeve is provided with a size positioning block. One end of the positioning block coincides with the zero scale on the ruler, and the inner wall of the fixed sleeve is provided with two vernier blocks that can slide along the length direction of the ruler and are engraved with a vernier scale. The two vernier blocks are mutually symmetrical and partly The fixed sleeve is extended, and racks are respectively provided on opposite sides thereof, and an adjuster that drives the racks to move symmetrically in opposite directions is provided on the ruler, and the end surface of the sliding seat is in contact with the two verniers. The end face of the block forms a flat inspection jaw. The invention has the advantages of simple and convenient tolerance inspection and high detection efficiency.

Description

A kind of tolerance inspection slide calliper rule

Technical field

The present invention relates to a kind of dimensional measurement and the instruments of inspection, relate in particular to a kind of tolerance inspection slide calliper rule.

Background technology

Tolerance is the permission variation of an actual parameter value.Manufacture for production and processing, formulating the conditional permission product of tolerance physical size can change within certain scope, so that the requirement that reaches shared, exchanges or work in coordination.Product is in manufacture process, inevitably there will be mismachining tolerance, the actual manufacturing dimension of property product or parts cannot reach a certain designated value accurately in batches, conventionally require the physical size of product to there is enough precision, that is the physical size of product and the deviation control of theoretical size are within the specific limits, in described allowed band, it is qualified that product is judged to be, this allowed band is tolerance, as size A , upper tolerance is+0.2, lower tolerance is-0.1, in the production run of workpiece, requires the physical size of product to be not more than theoretical size and upper tolerance sum, and is not less than theoretical size and lower tolerance sum.

The method of existing common employing kind of calliper detects, existing slide calliper rule comprise various vernier calipers, milscale and spiral dial gauge etc., in the time that whether the physical size of testing product or parts meets tolerance, two identical chi tools of general employing, the detection jaw of a handle is wherein adjusted to the corresponding size of upper tolerance, and fixes; Another detection jaw is adjusted to the corresponding size of lower tolerance, and fixes.When detection, if workpiece can snap in the corresponding detection jaw of tolerance, can not snap in the corresponding detection jaw of lower tolerance, judgement meets tolerance simultaneously, and workpiece is qualified.This metering system needs two chi tools, and need adjust respectively tolerance dimension, and does rotation and measure, and has the shortcomings such as size adjusting bothers, measuring process is loaded down with trivial details, inefficiency, is unfavorable for the fast detecting of workpiece; Also having a kind of way is to make special tolerance to detect tool, one end is upper tolerance dimension, and one end is lower tolerance dimension, and this tool has advantages of that detection is convenient, efficiency is very high, but shortcoming is also very obvious, can only measure a certain tolerance of single size, do not have a bit versatility to say, and cost of manufacture be high, a product often has a lot of sizes to need management and control, all use a lot of special fixtures, testing cost can be very high, directly affects the vitality of product.

Summary of the invention

The present invention has overcome the deficiencies in the prior art, provides a kind of tolerance simple in structure, that efficiency is high to check slide calliper rule.

For achieving the above object, the technical solution used in the present invention is: a kind of tolerance inspection slide calliper rule, comprise ruler, described ruler is provided with stiff end, sliding seat and fixed cover, described stiff end is the described ruler body of rod that master calibration and vernier graduation are carved with in both sides, described sliding base sleeve is being carved with the stiff end of described master calibration, similar or be equal to slidably structure of standard vernier caliper band dial plate, described fixed cover is enclosed within the stiff end that is carved with described vernier graduation, described fixed cover is provided with sizing piece, one end of described sizing piece overlaps with the zero graduation on described ruler, described fixed cover inwall is provided with and can slides and be carved with two vernier pieces of vernier graduation along ruler length direction, described two vernier pieces are symmetrical, part is extended described fixed cover, and described two vernier piece opposite sides are respectively arranged with tooth bar, on described ruler, be provided with and drive the regulator of described tooth bar toward reverse direction symmetric motion, the end face of the end face of described sliding seat and described two vernier pieces forms smooth detection jaw.

In a preferred embodiment of the present invention, a kind of tolerance inspection slide calliper rule further comprise that the xsect of described two vernier pieces is L-shaped, one side of described L shaped vernier piece is test side, opposite side is tolerance adjustable side, the side that described two vernier pieces are relative and the laminating of the side of described ruler, the upper surface of described two vernier pieces is concordant with the upper surface of described ruler.

In a preferred embodiment of the present invention, a kind of tolerance inspection slide calliper rule further comprise that described master calibration is taking 1mm as minimum scale, and described vernier graduation is taking 0.9mm as minimum scale.

In a preferred embodiment of the present invention, a kind of tolerance inspection slide calliper rule further comprise that described regulator comprises knob and the pull bar that is fixed on knob bottom, described pull bar is through described ruler and be fixed with the gear that can be meshed with described tooth bar in pull bar lower end, the ball that is provided with spring in described pull bar, is connected with spring, laterally has the arc groove springing into for described ball in described ruler.

In a preferred embodiment of the present invention, a kind of tolerance inspection slide calliper rule further comprise between described sliding seat and described ruler, be equipped with lock screw between described two vernier pieces and described ruler.

In a preferred embodiment of the present invention, a kind of tolerance inspection slide calliper rule further comprise that described sliding seat is along described ruler Central Symmetry.

The invention solves the defect existing in background technology, the present invention is simple in structure, convenient and practical, not only can be used as survey instrument, can also serve as the instruments of inspection of various workpiece, in the time of examining workpieces size, adjustment criteria size and desired tolerance are more convenient, measure gimmick direct, easy, in the scope of overall length dimension restriction, can detect any tolerance of arbitrary dimension, completely general, inspection and measurement are accurate, efficiency is high, have significantly reduced instrument purchase cost and the use cost of inspection and fields of measurement.

Brief description of the drawings

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is the structural representation of the preferred embodiments of the present invention;

Fig. 2 is the regulator syndeton schematic diagram of the preferred embodiments of the present invention;

Fig. 3 is the motion state diagram after the gear of the preferred embodiments of the present invention engages with two tooth bars;

In figure: 1, ruler, 2, sliding seat, 3, fixed cover, 4, sizing piece, 5, vernier piece, 6, vernier piece, 7, detect jaw, 8, detect jaw, 9, tooth bar, 10, tooth bar, 11, regulator, 12, knob, 13, pull bar, 14, gear, 15, spring, 16, ball, 17, arc groove, 18, lock screw, 19, lock screw, 20, lock screw, 21, stiff end, 22, stiff end.

Embodiment

The present invention is further detailed explanation in conjunction with the accompanying drawings and embodiments now, and these accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.

As shown in Figure 1, a kind of tolerance straightedge, comprise ruler 1, described ruler 1 is provided with stiff end 21, 22 and sliding seat 2 and fixed cover 3, described stiff end 21 is for being carved with described ruler 1 body of rod of master calibration A in both sides, described stiff end 22 is for being carved with described ruler 1 body of rod of vernier graduation B in both sides, described sliding seat 2 be enclosed within both sides be carved with master calibration A described stiff end 21 ruler 1 body of rod on, similar or be equal to slidably structure of standard vernier caliper band dial plate, described sliding seat 2 is along described ruler 1 Central Symmetry, described sliding seat 2 can be arranged to isosceles trapezoid, described fixed cover 3 is enclosed within both sides and is carved with on ruler 1 body of rod of described stiff end 22 of vernier graduation B, described fixed cover 3 is provided with sizing piece 4, align with the zero graduation on described ruler 1 in one end of described sizing piece 4, described fixed cover 3 inwalls are provided with and can slide and be carved with two vernier pieces 5 of vernier graduation C along ruler 1 length direction, 6, described two vernier pieces 5, 6 is symmetrical, part is extended described fixed cover 3, described two vernier pieces 5, 6 opposite sides are respectively arranged with tooth bar 9, on described ruler 1, be provided with and drive described tooth bar 9, 10 regulators 11 toward reverse direction symmetric motion, the end face of described sliding seat 2 and described two vernier pieces 5, 6 end face forms smooth detection jaw 7, 8.

The xsect of preferred described two the vernier pieces 5,6 of the present invention is L-shaped, one side of described L shaped vernier piece 5,6 is test side, opposite side is tolerance adjustable side, the side that described two vernier pieces 5,6 are relative and the laminating of the side of described ruler 1, the upper surface of described two vernier pieces 5,6 is concordant with the upper surface of described ruler 1, and the vernier graduation C on vernier piece 5,6 is alignd with the vernier graduation B on ruler 1.

Described master calibration A is taking 1mm as minimum scale, and described vernier graduation B, C are taking 0.9mm as minimum scale.In order to be widely used in the desired tolerance of different workpieces, the vernier graduation C on the vernier graduation B on ruler 1 and vernier piece 5,6 can also be arranged to 20 points of degree, 50 points of degree equal-specifications, this specification is consistent with the vernier graduation definition of vernier caliper.

As shown in Figure 2 and Figure 3, for the ease of inspection symmetric deviations, improve checkability, the preferred described regulator 11 of the present invention comprises knob 12 and is fixed on the pull bar 13 of knob 12 bottoms, described pull bar 13 is through described ruler 1 and be fixed with the gear 14 that can be meshed with described tooth bar 9,10 in pull bar 13 lower ends, in described pull bar 13, be provided with the ball 16 of spring 15, linking springs 15, the interior arc groove 17 springing into for described ball 16 that laterally has of described ruler 1.Ball 16 and ruler 1 medial surface laminating, when up lifting knob 12, when ball 16 moves to arc groove 17 position, spring 15 springs in arc groove 17 ball 16 by elastic force, and knob 12 blocks with pull bar 13, now gear 14 moves to the correspondence position of tooth bar 9,10, with tooth bar the 9, the 10th, be connected with a joggle, turn knob 12, is with carry-over bar 9,10 to move toward reverse direction by gear 14, and the distance of motion is equal, now vernier piece 5,6 equidistantly moves simultaneously round about; When pressing knob 12, when ball 16 shifts out arc groove 17, gear 14 separates with tooth bar 9,10, and now vernier piece 5,6 is independent mobile separately.

Between described sliding seat 2 and described ruler 1, be provided with lock screw 18, between described two vernier pieces 5,6 and described ruler 1, be respectively equipped with lock screw 19,20.

Principle of work of the present invention is as follows:

In the time of the tolerance of examining workpieces, basic size is A1, the upper deviation is+B1, lower deviation is-B2, first press knob 12, make ball 16 shift out arc groove 17, now vernier piece 5, 6 is independent mobile separately, secondly regulate sliding seat 2 to A1 scales, by lock screw 18, sliding seat 2 is fixed on ruler 1, again vernier piece 5 is moved to B1 from " 0 " scale toward the bearing of trend of vernier graduation B, vernier piece 6 is moved to B2 from " 0 " scale toward the bearing of trend of master calibration A, again by lock screw 19, 20 by two vernier pieces 5, 6 are fixed on ruler 1, finally workpiece is inserted from the detection jaw 8 between detection jaw 7 and sliding seat 2 and vernier piece 6 between sliding seat 2 and vernier piece 5 continuously, if can insert the detection jaw 7 between sliding seat 2 and vernier piece 5, but can not insert the detection jaw 8 between sliding seat 2 and vernier piece 6, the size that this workpiece is described is less than the upper deviation but is greater than lower deviation, tolerance is in institute's claimed range, meet dimensional requirement, workpiece is qualified, if can not insert the detection jaw 7 between sliding seat 2 and vernier piece 5, illustrate that the size of this workpiece exceedes the upper deviation, this workpiece is defective, if can insert the detection jaw 8 between sliding seat 2 and vernier piece 6, illustrate that the size of this workpiece is less than lower deviation, do not meet dimensional requirement, this workpiece is defective.

In the time of the tolerance of examining workpieces, basic size is A1, the upper deviation is+B1, lower deviation is-B1, first up lift knob 12, make ball 16 move to arc groove 17 positions, now vernier piece 5, 6 equidistantly move simultaneously round about, secondly regulate sliding seat 2 to A1 scales, by lock screw 18, sliding seat 2 is fixed on ruler 1, again by vernier piece 5, 6 move to " 0 " scale position, drive vernier piece 5 to move to B1 from " 0 " scale toward the bearing of trend of vernier graduation B, vernier piece 6 also moves to B1 from " 0 " scale toward the bearing of trend of master calibration A simultaneously, again by lock screw 19, 20 by vernier piece 5, 6 are fixed on ruler 1, finally workpiece is inserted from the detection jaw 8 between detection jaw 7 and sliding seat 2 and vernier piece 6 between sliding seat 2 and vernier piece 5 continuously, if can insert the detection jaw 7 between sliding seat 2 and vernier piece 5, but can not insert the detection jaw 8 between sliding seat 2 and vernier piece 6, the size that this workpiece is described is less than the upper deviation but is greater than lower deviation, tolerance is in institute's claimed range, meet dimensional requirement, this workpiece is qualified, if can not insert the detection jaw 7 between sliding seat 2 and vernier piece 5, illustrate that the size of workpiece exceedes the upper deviation, this workpiece is defective, if can insert the detection jaw 8 between sliding seat 2 and vernier piece 6, illustrate that the size of this workpiece is less than lower deviation, do not meet dimensional requirement, this workpiece is defective.

In the time of the tolerance of examining workpieces, detect jaw 7 and also can be used as the inspection of lower deviation and detect the inspection of jaw 8 as the upper deviation, when inspection, the moving direction of vernier piece 5,6 is just in time contrary with said method.

Be enlightenment according to desirable embodiment of the present invention above, by above-mentioned description, related personnel can, not departing from the scope of this invention technological thought, carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine technical scope according to claim scope.

Claims

1. A tolerance inspection caliper, comprising a ruler, is characterized in that: the ruler is provided with a first fixed end, a second fixed end, a sliding seat and a fixed sleeve, and the first fixed end is engraved with main points on both sides. The ruler rod body of the scale, the second fixed end is the ruler rod body with vernier scales engraved on both sides, the sliding seat covers the first fixed end engraved with the main scale, and the fixed sleeve covers At the second fixed end engraved with the vernier scale, the fixed sleeve is provided with a size positioning block, one end of the size positioning block coincides with the zero scale on the ruler, and the inner wall of the fixed sleeve is provided with a Two vernier blocks that slide along the length direction of the ruler and are engraved with vernier scales, the two vernier blocks are mutually symmetrical, partially extend out of the fixed sleeve, and the opposite sides of the two vernier blocks are respectively provided with racks, the The ruler is provided with an adjuster that drives the rack to move symmetrically in opposite directions, and the end face of the sliding seat and the end faces of the two vernier blocks form a flat detection jaw.

2. A kind of tolerance inspection caliper according to claim 1, characterized in that: the cross-section of the two vernier blocks is L-shaped, one side of the L-shaped vernier block is the detection end, and the other side is the tolerance At the adjustment end, the opposite sides of the two vernier blocks are in contact with the side surfaces of the ruler, and the upper surfaces of the two vernier blocks are flush with the upper surface of the ruler.

3. A kind of tolerance inspection caliper according to claim 1, characterized in that: the minimum scale of the main scale is 1 mm, and the minimum scale of the vernier scale is 0.9 mm.

4. A kind of tolerance inspection caliper according to claim 1, characterized in that: the adjuster comprises a knob and a pull rod fixed at the bottom of the knob, the pull rod passes through the ruler and is fixed at the lower end of the pull rod with a The rack is meshed with the gear, the pull rod is provided with a spring and a ball connected with the spring, and an arc-shaped groove for the ball to pop into is provided in the horizontal direction of the ruler.

5. A tolerance inspection caliper according to claim 1, wherein locking screws are provided between the sliding seat and the ruler, and between the two vernier blocks and the ruler .

6. A kind of tolerance inspection caliper according to claim 1, characterized in that: said sliding seat is symmetrical along said ruler.