CN105698631A - Caliper - Google Patents

Abstract

The invention relates to a measuring tool, provides a linear dimensional measurement tool, and especially a caliper. The caliper includes two states of an inside caliper and an outside caliper. The caliper comprises a pair of caliper arms which are arranged symmetrically and crosswise articulated through a rotational pin. One side of each caliper arm is a clamping segment and the other side is a reading segment, and the clamping segment and the reading segment are partitioned by the rotational pin. Caliper heads having adjustable included angles with the caliper arms in a plane defined by a pair of caliper arms are arranged at the ends of the clamping segments. The two caliper heads with the front tips are arranged symmetrically. When the caliper heads incline inwardly, the caliper is the inside caliper. When the caliper heads incline outwardly, the caliper is the outside caliper. A reading device for reflecting the inside caliper length and the external caliper length is arranged at the reading segments. When the caliper heads incline inwardly to limit positions, an included angle of a caliper head axis and a clamping segment axis is 12 degrees. When the caliper heads incline outwardly to limit positions, an included angle of the caliper head axis and the clamping segment axis is 25 degrees. The front ends of the caliper heads are in a wedge shape.

Description

Clamp

Technical field

This technology relates to measurer, a kind of linear dimension survey tool is provided, especially a kind of clamp, these clamp can use as inside plain calipers when wall-thickness measurement equidimension, can use as bow compass when measuring internal orifice dimension equidimension, it is possible to directly read measurement data。

Background technology

In prior art when measuring the linear dimensions such as the wall thickness of part, internal orifice dimension, groove width, more use inside plain calipers, bow compass carry out subsidiary, after corresponding with the size needing measurement for clamp aperture, need to remove clamp, utilize the linear dimension of other gage measuring clamp opening, testing result is by the impact of reviewer's technical ability, it is difficult to ensures that clamp aperture does not change, is also just difficult to ensure that the precision of measurement。It addition, the common clamp of prior art are single inside plain calipers, bow compass, function singleness, it is impossible to measurement result direct reading, it is impossible to meet and measure requirement direct, effective。

Summary of the invention

The purpose of this technology is to provide a kind of clamp, and these clamp can use as inside plain calipers when wall-thickness measurement equidimension, can use as bow compass when measuring internal orifice dimension equidimension, it is possible to directly read measurement data。

The purpose of this technology is to be achieved through the following technical solutions:

A kind of clamp, including being symmetrical arranged, by a pair tong arm of rotational pin cross-articulation, each tong arm is clamping section in the side of rotational pin, and opposite side is reading section；Clamping section end is provided with dop adjustable with tong arm angle in the plane that a pair tong arm determines, two dops that front end is tip are symmetrical arranged, and are interior card when dop slopes inwardly, and are wild card when dop is outward-dipping；It is additionally provided with the reading plotter for reflecting interior card length and wild card length in reading section；When dop is angled inwardly into extreme position, the angle between dop axis and clamping section axis is 12 °；Dop outward-dipping to extreme position time, the angle between dop axis and clamping section axis is 25 °；The front end of dop is wedge shaped。

This technology provides the benefit that:

During use, determine the state of clamp, i.e. inside plain calipers or bow compass according to measurement target, make span of jaw corresponding with measuring target linear dimension according to common clamp operating specification, directly read measurement result。When interior card length and dop slope inwardly, the distance between the front end of two dops, distance when wild card length and dop are outward-dipping, between the front end of two dops。

As the improvement to this technology, it is additionally provided with the locking device for a pair tong arm can be locked in certain angle in clamping section。

Locking device includes the locking plate offering mounting hole above, and mobile two lock-screws being arranged in mounting hole, a lock-screw is linked by screw thread pair with a tong arm。

Above-mentioned improvement, these clamp unclamp lock-screw when testing can adjust the angle between a pair tong arm flexibly, namely adjusts span of jaw flexibly, when span of jaw is to when coincideing with measurement target linear dimension, this state is locked by locking lock-screw, to ensure the stability of measurement result。

As the further improvement to this technology, dop is rotatably arranged in clamping section end by control screw, is provided with in the both sides, rear end of dop and is angled inwardly into extreme position and the outward-dipping positive stop lug boss to extreme position for limiting dop。

As the further improvement to this technology, reading plotter includes the trisquare offering circular arc waist row hole above, mobile two leads being arranged in waist row hole, a lead and a tong arm connect, and are provided with the graduation mark corresponding respectively to wild card length and Nei Ka length on the two sides of trisquare。

This improvement, the measurement data that dop is most advanced and sophisticated, according to similar triangle theory, is converted to the scale above reading plotter by reading plotter, and the two is mutually corresponding。

As the another kind of improvement to this technology, being further opened with relative groove in two reading section rear ends, groove is for placing the card pin of slide gauge。

The groove for placing slide gauge measurement it is provided with in rear end。After placing slide gauge card pin in groove, card pin can reliably seal with groove and contact, and for using slide gauge measurement to provide essence benchmark, is beneficial to guarantee certainty of measurement, easy to use。

Accompanying drawing explanation

Fig. 1 is the structural representation of clamp

Fig. 2 is the structural representation of a tong arm

Fig. 3 is clamp is schematic diagram during interior card

Fig. 4 is clamp is schematic diagram during wild card。

Detailed description of the invention

Below in conjunction with accompanying drawing, this technology is described further:

Shown in Fig. 1, Fig. 2, a kind of clamp, including being symmetrical arranged, by a pair tong arm 10 of rotational pin 9 cross-articulation, each tong arm 10 is clamping section 11 in the side of rotational pin 9, and opposite side is reading section 12；Clamping section 11 end is provided with dop 2 adjustable with tong arm 10 angle in the plane that a pair tong arm 10 determines, two dops 2 that front end is tip are symmetrical arranged, it is interior card (shown in Figure 3) when dop 2 slopes inwardly, is wild card (shown in Figure 4) when dop 2 is outward-dipping；It is additionally provided with reading plotter in reading section 12。

The thickness of tong arm 10 is certain, and it is 6mm that empirical data chooses the thickness of tong arm 10, and for ensureing the rigidity of tong arm 10, with rotational pin 9 place for boundary, the two ends of tong arm 10 are all equi intensity cantilever。

It is additionally provided with the locking device for a pair tong arm can be locked in certain angle in clamping section。Locking device includes the locking plate 16 offering mounting hole 15 above, and mobile two lock-screws 4 being arranged in mounting hole 15, a lock-screw 4 is linked by screw thread pair with a tong arm 10。

For reducing frictional force when lock-screw 4 moves in mounting hole 15, mounting hole 15 is in circular arc, and the pitch radius of circular arc is the spacing of rotational pin 9 and lock-screw 4。

Dop is rotatably arranged in clamping section end by controlling screw, is separately provided for limiting dop 2 in the both sides, rear end of dop 2 and is angled inwardly into the positive stop lug boss 14 of extreme position and the outward-dipping positive stop lug boss 13 to extreme position。

The effect controlling screw 3 rotates offer rotating shaft for dop 2 on the one hand, also acts as the effect of lock-screw on the other hand, it is possible to be locked on extreme position by dop 2。

When dop 2 slopes inwardly, positive stop lug boss 14 limits the angle between dop 2 axis and clamping section 11 axis as 12 °, and now, these clamp are interior card；When dop is outward-dipping, positive stop lug boss 13 limits the angle between dop 2 axis and clamping section 11 axis as 25 °, and now, these clamp are wild card。

The front end of dop 2 is wedge shaped or taper。

Reading plotter includes the trisquare 18 offering circular arc waist row hole 17 above, move two leads 5 being arranged in waist row hole 17, one lead 5 is connected with a tong arm 10, is provided with the graduation mark 6 corresponding respectively to wild card length and Nei Ka length on the two sides of trisquare 18。

For reducing frictional force when lead 5 moves in mounting hole 17, mounting hole 17 is in circular arc, and the pitch radius of circular arc is the spacing of rotational pin 9 and lead 5。

Trisquare 18 can be always symmetrical about the middle separated time of these clamp, equidistant movement (state of diagram) when two leads are mobile in mounting hole 17, now the center line of the graduation mark 6 of trisquare 18 is " 0 " graduation mark, and note needs to be added the reading on " 0 " graduation mark both sides when reading measurement result。It is of course also possible to only one of which lead is mobile in mounting hole 17, another lead only plays and trisquare 18 is fixed on the effect on tong arm 10, and now " 0 " graduation mark of trisquare 18 is positioned at the side that lead is motionless, can visual reading during note reading measurement result。

Can there be Nei Ka and wild card two states due to these clamp, therefore be all provided with graduation mark on the two sides of trisquare 18 corresponding with Nei Ka and wild card respectively。

Be further opened with relative groove 7 in two reading section 12 rear ends, groove 7 can use slide gauge to carry out card pin (not shown) measured directly for placement。

During use, determine the state of clamp, i.e. inside plain calipers or bow compass according to measurement target, make span of jaw corresponding with measuring target linear dimension according to common clamp operating specification, corresponding graduation mark directly reads measurement result。

This technology provides the benefit that:

Clamp described in this technology, are the multi-functional clamp that can directly measure part arm thickness, internal diameter。The reading plotter of these multi-functional clamp can directly read millimeter, it is also possible to reads with slide gauge and counts more accurately；The available screw that controls of clamping section is adjusted to Nei Ka and wild card, and locking device is for fixing clamp position during reading；Reading plotter is the trisquare reading plotter utilizing the principle of similitude of triangle to make, and fluted can so that vernier caliper reading。

These clamp, it is possible to have Nei Ka and wild card two states, it is possible to direct reading, can meet measurement requirement direct, effective, and easy to use, simple in construction, processing technology is better。

Claims (4)

1. clamp, including being symmetrical arranged, by a pair tong arm of rotational pin cross-articulation, is characterized in that, each tong arm is clamping section in the side of rotational pin, and opposite side is reading section；Clamping section end is provided with dop adjustable with tong arm angle in the plane that a pair tong arm determines, two dops that front end is tip are symmetrical arranged, and are interior card when dop slopes inwardly, and are wild card when dop is outward-dipping；It is additionally provided with the reading plotter for reflecting interior card length and wild card length in reading section；When dop is angled inwardly into extreme position, the angle between dop axis and clamping section axis is 12 °；Dop outward-dipping to extreme position time, the angle between dop axis and clamping section axis is 25 °；The front end of dop is wedge shaped。

2. clamp according to claim 1, is characterized in that, are additionally provided with the locking device for a pair tong arm can be locked in certain angle in clamping section；Locking device includes the locking plate offering mounting hole above, and mobile two lock-screws being arranged in mounting hole, a lock-screw is linked by screw thread pair with a tong arm。

3. clamp according to claim 1, it is characterized in that, reading plotter includes the trisquare offering circular arc waist row hole above, mobile two leads being arranged in waist row hole, one lead and a tong arm connect, and are provided with the graduation mark corresponding respectively to wild card length and Nei Ka length on the two sides of trisquare。

4. clamp according to claim 1, is characterized in that, are further opened with relative groove in two reading section rear ends, and groove is for placing the card pin of slide gauge。