CN105953678A - Clamp - Google Patents

Abstract

The invention relates to a measuring tool, and provides a linear size measurement tool, especially a clamp. The clamp has two states: internal clamping and external clamping. The clamp comprises a pair of clamp arms which are arranged symmetrically and are hinged in a crossing manner through a rotating pin. A part, located at one side of the rotating pin, of each clamp arm serves as a clamping segment, and a part, located at the other side of the rotating pin, of each clamp arm serves as a reading segment. An end part of each clamping segment is provided with a clamping head, wherein the inclined angle between the clamping head and the corresponding clamp arm in a plane defined by the pair of clamp arms can be adjusted. The two clamping heads with the pointed front ends are arranged symmetrically. When the clamping heads are inclined inwards, the clamp is in the state of internal clamping; when the clamping heads are inclined outwards, the clamp is in the state of external clamping. The reading segments are provided with reading devices which are used for reflecting an internal clamping length and an external clamping length. When the clamping heads are inclined inwards to a limit position, the inclined angles between the axes of the clamping heads and the axes of the clamping segments are 12 degrees; when the clamping heads are inclined outwards to a limit position, the inclined angles between the axes of the clamping heads and the axes of the clamping segments are 25 degrees; The front ends of the clamping heads are conical.

Description

A kind of clamp

Technical field

This technology relates to measurer, it is provided that a kind of linear dimension survey tool, especially a kind of clamp, and wall measured by these clamp Can use as inside plain calipers during thick equidimension, can use as bow compass when measuring internal orifice dimension equidimension, it is possible to be straight Connect reading measurement data.

Background technology

In prior art when measuring the linear dimension such as the wall thickness of part, internal orifice dimension, groove width, more use inside plain calipers, outer Clamp carry out subsidiary, after corresponding with the size needing measurement for clamp aperture, need to remove clamp, utilize other measurer Measuring the linear dimension of clamp opening, testing result is affected by reviewer's technical ability, it is difficult to ensure that clamp aperture does not changes Become, be the most 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 list One, 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 make as inside plain calipers when wall-thickness measurement equidimension With, measure internal orifice dimension equidimension time can use as bow compass, 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 in the side of rotational pin For clamping section, opposite side is reading section；Being provided with in clamping section end can with tong arm angle in the plane of a pair tong arm decision With the dop adjusted, front end is that two dops of tip are symmetrical arranged, and is interior card, when dop is outward-dipping when dop slopes inwardly For wild card；It is additionally provided with for reflecting interior card length and the reading plotter of wild card length in reading section；Dop slopes inwardly extremely During extreme position, the angle between dop axis and clamping section axis is 12 °；Dop outward-dipping to extreme position time, dop axis And the angle between clamping section axis is 25 °；The front end of dop is tapered.

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 according to common clamp operating specification Span of jaw is corresponding with measuring target linear dimension, directly reads measurement result.Interior card length is time i.e. dop slopes inwardly, and two Distance between the front end of individual dop, wild card length is time i.e. dop is outward-dipping, the distance between the front end of two dops.

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

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

Above-mentioned improvement, these clamp unclamp the angle that lock-screw can be adjusted flexibly between a pair tong arm, i.e. spirit when testing Live and adjust span of jaw, when span of jaw is to when coincideing with measurement target linear dimension, and 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 controlling screw, The both sides, rear end of dop are provided with and are angled inwardly into extreme position and outward-dipping spacing to extreme position for limiting dop Boss.

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

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

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

It is provided with in rear end for placing the groove that slide gauge measures.After placing slide gauge card pin in groove, Card pin can reliably seal with groove and contact, and for using slide gauge to measure offer essence benchmark, is beneficial to ensure 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 be clamp be interior card time schematic diagram.

Fig. 4 be clamp be schematic diagram during wild card.

Detailed description of the invention

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

Seeing 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, often Individual tong arm 10 is clamping section 11 in the side of rotational pin 9, and opposite side is reading section 12；It is provided with at a pair in clamping section 11 end With the tong arm 10 adjustable dop of angle 2 in the plane that tong arm 10 determines, front end is that two dops 2 of 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；At reading Section 12 is additionally provided with reading plotter.

The thickness of tong arm 10 is certain, and it is 6mm that empirical data chooses the thickness of tong arm 10, for ensureing the rigidity of tong arm 10, with Being boundary at rotational pin 9, 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 Offer the locking plate 16 of mounting hole 15, mobile two lock-screws 4 being arranged in mounting hole 15, a lock-screw above 4 are linked by screw thread pair with a tong arm 10.

For reduce lock-screw 4 move in mounting hole 15 time frictional force, mounting hole 15 in circular arc, the pitch circle of circular arc Radius is the spacing of rotational pin 9 and lock-screw 4.

Dop is rotatably arranged in clamping section end by controlling screw, is respectively arranged with in the both sides, rear end of dop 2 It 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 for limiting dop 2.

On the one hand the effect controlling screw 3 rotates offer rotating shaft for dop 2, on the other hand also acts as the work of lock-screw With, dop 2 can be locked on extreme position.

When dop 2 slopes inwardly, positive stop lug boss 14 limits the angle between dop 2 axis and clamping section 11 axis as 12 °, this Time, 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 Being 25 °, now, these clamp are wild card.

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

Reading plotter includes the trisquare 18 offering above circular arc waist row hole 17, mobile is arranged in waist row hole the two of 17 Individual lead 5, a lead 5 is connected with a tong arm 10, is provided with on the two sides of trisquare 18 and corresponds respectively to wild card length Graduation mark 6 with interior card length.

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

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

Owing to these clamp can have Nei Ka and wild card two states, therefore all it is provided with graduation mark on the two sides of trisquare 18 respectively Corresponding with Nei Ka and wild card.

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

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

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.These multi-functional clamp Reading plotter can directly read millimeter, it is also possible to reads with slide gauge and counts more accurately；Clamping section is available controls screw It is adjusted to Nei Ka and wild card, clamp position when locking device is for fixing reading；Reading plotter is utilize triangle similar The trisquare reading plotter that principle makes, and fluted can be so that vernier caliper reading.

These clamp, can have Nei Ka and wild card two states, can with direct reading, can meet measurement directly, effectively want Asking, easy to use, simple in construction, processing technology is preferable.

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 exists The side of rotational pin is clamping section, and opposite side is reading section；It is provided with in the plane of a pair tong arm decision in clamping section end Dop adjustable with tong arm angle, front end is that two dops of tip are symmetrical arranged, and is interior card when dop slopes inwardly, card It is wild card time outward-dipping；It is additionally provided with for reflecting interior card length and the reading plotter of wild card length in reading section；Dop When being angled inwardly into extreme position, the angle between dop axis and clamping section axis is 12 °；Dop is outward-dipping to extreme position Time, the angle between dop axis and clamping section axis is 25 °；The front end of dop is tapered.

Clamp the most according to claim 1, is characterized in that, are additionally provided with for being locked in by a pair tong arm in clamping section The locking device of certain angle；Locking device includes the locking plate offering mounting hole above, moves and is arranged in mounting hole Two lock-screws, a lock-screw is linked by screw thread pair with a tong arm.

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

Clamp the most according to claim 1, is characterized in that, are further opened with relative groove, groove in two reading section rear ends For placing the card pin of slide gauge.