CN101490500B - Contact detector - Google Patents
Contact detector Download PDFInfo
- Publication number
- CN101490500B CN101490500B CN2007800257729A CN200780025772A CN101490500B CN 101490500 B CN101490500 B CN 101490500B CN 2007800257729 A CN2007800257729 A CN 2007800257729A CN 200780025772 A CN200780025772 A CN 200780025772A CN 101490500 B CN101490500 B CN 101490500B
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- China
- Prior art keywords
- ball
- contact detector
- support component
- face
- pin
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
- G01B5/008—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points using coordinate measuring machines
- G01B5/012—Contact-making feeler heads therefor
- G01B5/016—Constructional details of contacts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Leads Or Probes (AREA)
Abstract
The invention relates to a contact detector for detecting the contact of the tip of a detection needle fitted in a biased state at a stable position determined by six supporting points with an object to be detected. The error of the stable position is prevented from occurring because of the temperature change and secular change. In the simple structure of the device, balls supporting the detection needle are fixed by bringing them into direct contact with their supporting member (4). The contact detector comprises the balls (5) to form a receiving part (15) receiving three supporting legs (3)radially extending from the base (2) of the detection needle. The balls are positioned by semi-spherical or conical receiving surfaces (12) formed in the supporting member (4). The contact detector further comprises screws or springs extending from the outer surface of the supporting member (4) to the non-receiving surfaces of the balls (5). The balls (5) are directly pressed by the ends of the screws or springs without applying an adhesive agent onto the receiving surfaces (12).
Description
Technical field
The present invention relates to a kind of contact detector that the test side of detecting pin and contacting of detected object thing are detected, so relate to described contact detector: detect pin under the state that the spring that is reset is pushed, be supported on by on six settling positions that the strong point limited being located in the housing with following structure.Thereby the present invention relates to a kind of preventing and the accuracy of detection of contact detector is caused dysgenic technology owing to temperature variation or the aging position that makes the described strong point produce error.
Background technology
This contact detector has the detection pin and the housing that supports this detection pin that is provided with the test side that contacts with the detected object thing at front end.Detect the base portion of pin that is the end of test side opposition side and be reset spring (being built in the housing) by on six strong points that are pressed on the support component that is formed in the housing.Be not subjected in the test side under the state of external force effect, detect pin and remain on by on the settling position in described six three dimensions that the strong point limited.After the front end that detects pin touches the detected object thing, detect that pin is subjected to contacting reacting force and, separate (leaving) with in described six strong points at least one from described settling position tilting action a little.Go out the separation of this strong point by electrical, thereby detect contacting of test side and detected object thing.
Such contact detector for example can be provided with shank (shank) 22 as shown in Figure 9 on housing 21, this shank is assembled on the tool spindle 23 of lathe, is used for the relative position relation of survey instrument installation shaft and workpiece 24.That is, contact detector 20 is assemblied on the tool spindle 23 of lathe, be fixed with workpiece 24 on the worktable 25 of described lathe, and tool spindle 23 or worktable 25 move by not shown numerical control (NC) device as the detected object thing.And, tool spindle or the coordinate on the worktable, the relative position relation of survey instrument installation shaft and workpiece thus when reading from test side 13 that contact detector output detects pin 1 with activation signal that workpiece 24 contacts.Built-in support component 4 and back-moving spring 16 in the housing 21 with described six strong points.Support component 4 is fixed in the housing 21 via adjusting screw 26, by adjusting adjusting screw 26, is that central shaft with shank 22 is on same axis with the set positions of the test side on the described settling position 13.
For on support component 4, being formed with the structure that is used to support six strong points that detect pin 1, propose to have various schemes.Wherein a kind of simple in structure and structure that can limit settling position accurately is: be at the base portion that detects pin 1 three supporting legs are set radially, and by disposing on the circumference that with the axle center of detecting pin is the center two are that three groups of balls of one group support this three supporting legs.
This structure is shown in Fig. 5-7.As shown in the figure, three supporting legs 3 are arranged at on the base portion 2 of front end 13 as the detection pin 1 of test side along the radiation direction with the interval of 120 degree mutually.Supporting leg 3 is cylindrical.On support component 4, on each vertex position of equilateral triangle that is the center, be that the ball 5 of six of combinations is formed with three incorporating sections 15 in the axle center of detecting pin 1 with two.Incorporating section 15 is formed in the part of two recesses between the ball 5.And the base portion that will detect pin by back-moving spring 16 is supported on each supporting leg 3 respectively in the incorporating section 15 opposed with it thus by to incorporating section 15 sides.Three supporting legs 3 contact with the sphere of two balls that support respectively, form six strong points 10, limit the settling position that detects pin 1 by these six strong points 10.
That is the test side 13 of detecting pin in three dimensions three position and six strong points 10 between supported leg 3 of the rotation angle of these three axles and ball 5 on axially have been limited on this settling position.By contacting of test side 13 and detected object thing, test side 13 produces small moving, and at this moment detects pin 1 and tilts a little, in the ball 5 at certain strong point 10 place and the contact separation of supporting leg 3.On the other hand, do not have external force to do the time spent on the test side, under the elastic force effect of back-moving spring 16, test side 13 always can return on the constant settling position.
When the detected object thing all is the good conductor of electricity, detects pin and can come out as the electric circuit inspection of external contact by the surface of this detected object thing and the contact point that detects between the pin with contacting of detected object thing.In addition, when the detected object thing comprises the poor conductor of electricity, detect pin and can come out as the electric circuit inspection of inner contact by the strong point 10 between ball 5 and the supporting leg 3 with contacting of detected object thing.What for example illustrate to meaning property shown in Fig. 8 is such, and inner contact can form by the circuit 17 that six strong points 10 between supporting leg 3 and the ball 5 are connected in series is set.When detection pin 1 departs from settling position, the supporting leg 3 at certain strong point 10 place and the contact separation of ball 5, this separation is detected as electric signal (connection of circuit 17 disconnects).
Fig. 7 is the illustration figure that expression ball 5 is fixed in the concrete structure in the support component 4.In illustrated example, in the support component 4 of hollow cylindrical, utilize ball end mill to leave and be used to take in the reception hole 6 of ball 5, and between adjacent reception hole, process the slit 7 that supplies supporting leg 3 insertions and edge radiation direction with the center pit 14 that passes for the detection pin.The width of slit 7 is enough wideer than the diameter of supporting leg 3.The bottom surface of the reception hole of leaving by ball end mill becomes the hemispheric face of taking in, and by sticker ball 5 adhesions is fixed on this and takes on the face.
Can carry out high-precision processing to the supporting leg 3 of ball 5 and round bar shape.On the other hand, the established angle of the degree of depth of reception hole 6 and supporting leg 3 is easy to generate error.Yet the site error of the test side 13 that is caused by this error can be proofreaied and correct by the inclination on the two-dimensional directional of the support component in the housing of each detecting device 4 is initially adjusted.
Patent documentation 1: Japanese kokai publication hei 11-94509 communique
Measuring position, size the time, must consider the thermal deformation of detecting device self and detected object thing etc. accurately.When detecting the position of workpiece in metal-working plant, by with iron or have material detecting device with the thermal expansivity of iron equal extent, thereby can reduce the error that causes by thermal expansion.Yet, in the existing structure that by sticker ball 5 is adhesively fixed in the support component 4, because the thermal expansivity difference of sticker might produce error when variation of ambient temperature.More seriously, because the incorporating section is different with the thermal expansivity of sticker with ball, along with the aging situation that can exist adhering agent layer generation crack or sticker to peel off.Produced these situations, the position deviation initial position of ball, the settling position of test side 13 produces than mistake.Particularly for the long detecting device of length of the relative supporting leg 3 of length that detects pin 1, ball 5 small offsets will make the settling position of test side 13 produce bigger skew, thereby cause measuring accuracy to descend significantly.
Summary of the invention
Problem of the present invention is, addresses the above problem, even provide a kind of under the violent environment of temperature variation, the settling position that detects the pin front end can be because of the supporting construction of the aging detection pin that change yet.Thus, more high-precision measurement can be carried out, and the longer contact detector of life of product can be accessed.
The present invention directly contacts the simple structure of fixing with the support component 4 of contact detector by a kind of ball of the support detection pin of contact detector that makes is provided, thereby solves above-mentioned problem.
Contact detector of the present invention has: detect pin 1, it has the test side that contacts with the detected object thing; Three supporting legs 3, it extends along the radiation direction from the base portion 2 that this detects pin; Two is three groups of balls 5 of one group, and it is formed for taking in the incorporating section 15 of each supporting leg; Support component 4, it supports described detection pin 1 by means of this ball group; And back-moving spring 16, it pushes described supporting leg 3 to described incorporating section 15.
In contact detector of the present invention, the ball 5 that is used to form incorporating section 15 is positioned in the hemispherical or cone shape of reception hole 6 bottoms that is formed in the support component 4 and takes on the face 12.On support component 4, be provided with from its periphery respectively towards the threaded hole 8 of six balls 5.Be combined with screw 9 respectively in this each threaded hole, this screw 9 is used for ball 5 is pressed on the face of taking in 12 of reception hole 6 bottoms that are provided with at support component 4.By with screw 9 with each ball 5 respectively by on the face of taking in 12 that is pressed in reception hole bottom, establish under the face of taking in 12 state of contact of adhering agent layer ground reception hole direct and that be provided with in support component 4 in order to take in ball 5 thereby each ball 5 is not pressed from both sides, be fixed on the ad-hoc location.
Threaded hole 8 can be along the direction setting of the face of taking in 12 bottom reception hole by pressure ball 5.Threaded hole 8 also can along with the direction setting of the direction quadrature of pressing pressure ball 5.Under the latter's the situation, adopt front end to have the screw 9 of the dome conical surface 11.When being combined on screw 9 in the threaded hole 8, the front end of screw 9 directly is crimped on ball 5 on the face of taking in 12 of each reception hole bottom and to it and fixes.And then, also can form ball 5 by volute spring 18 or leaf spring by the structure on the face of taking in 12 that is pressed in each reception hole bottom.
Detecting pin 1 from the contact detector that settling position leaves by inner contact type electric circuit inspection, supporting leg 3 and ball 5 are formed by electric conductor, making the base portion 2 and the support component 4 that detect pin is insulator.When detecting, all form electric conductor by making whole detection pin, supporting leg, ball and support component 4, thereby do not need the internal electrical wiring by external contact type circuit.Supporting leg 3 is that the center forms along the radiation direction with separating 120 degree with the axle center of detection pin 1 generally, yet also can not center on the axle center, also can not be the equal angles interval.
In structure of the present invention, the ball 5 that (that is do not press from both sides establish adhering agent layer etc.) will be used to limit the settling position that detects pin because directly is crimped on the support component 4 to be fixed, and therefore substantially can or aging the position of ball 5 be changed because of variation of ambient temperature.Thereby, even the precision that also can keep the settling position that detects pin 1 through the long period can be provided, can carry out long contact detector of more high-precision contact detection and life-span.
And, the fixed sturcture of this ball is to be suitable for supporting the shape of the incorporating section 15 of detecting pin and the reasonable and simple structure of structure, on support component 4, leave threaded hole 8 from the side and screw 9 is screwed in these threaded holes, perhaps on support component 4, leave spring patchhole 18 from the side and spring 19 is inserted into this spring and insert in the hole and get final product, therefore make very simple.In the structure of end for the screw 9 of circular conical surface, ball 5 is fixed on the face of taking in 12 of ball reception hole bottom before use, therefore utilizes less screw just ball 5 can be fixed firmly by the dual chock effect of screw and circular conical surface.
Description of drawings
Fig. 1 is the vertical view of the major part of expression one embodiment of the present of invention.
Fig. 2 is the cut-open view along the A-A line of Fig. 1.
Fig. 3 is the cut-open view along the A-A line of Fig. 1 of expression second structure different with Fig. 2.
Fig. 4 is the cut-open view along the A-A line of Fig. 1 of expression three structure different with Fig. 2 and Fig. 3.
Fig. 5 is the stereographic map of an example of the existing contact detector of expression.
Fig. 6 is the vertical view of major part of the contact detector of presentation graphs 3.
Fig. 7 is the cut-open view of supporting construction of supporting leg of the contact detector of presentation graphs 3.
Fig. 8 is the synoptic diagram of an example of expression contact detection circuit.
Fig. 9 is the synoptic diagram that makes use-case of expression position detector.
Label declaration
1: detect pin; 2: the base portion that detects pin; 3: supporting leg; 4: support component; 5: ball; 6: the ball reception hole; 8: the minor thread hole; 9: Screw; 11: the dome conical surface; 12: the face of taking in of ball reception hole bottom; 15: the incorporating section; 16: back-moving spring.
Embodiment
Then, with reference to this inventive embodiment of description of drawings.The supporting construction that detects pin 1 is identical with existing structure shown in Figure 5, is to be the structure along three supporting legs 3 of radiation direction extension that three groups of balls 5 of one group are accommodated in that base portion 2 is provided with two on the circumference that is disposed at support component 4.
As shown in Figure 2, ball 5 is inserted into the bottom of reception hole 6, and this reception hole 6 is the holes that utilize ball end mill to leave abreast with the direction that detects pin 1 in support component 4.Between the reception hole 6 that inserts respectively for two balls taking in a supporting leg 3, be formed with the slit 7 that inserts for supporting leg 3.
In support component 4, be provided with minor thread hole 8, described minor thread hole 8 is towards the top of the ball 5 that is positioned at reception hole 6 bottoms, from the outer circumferential edge of support component 4 and this ball set the tangent direction setting of pitch circle, and front end is fined away into cone shape Screw 9 and is screwed in these minor thread holes.After ball 5 being inserted in the reception hole 6, screw in Screw 9, thereby make the circular conical surface 11 of screw front end and the top butt of ball 5, the chock effect that the contact site that contacts with ball 5 by the circular conical surface of the precession effect of screw thread and Screw 9 front ends by Screw 9 produces is fixed ball 5 by being pressed in hemispherical the taking on the face 12 that is formed at reception hole 6 bottoms.
Fig. 3 pushes ball 5 and be fixed on the figure of second example on the face of taking in 12 of reception hole bottom for expression.In the example of Fig. 3, be provided with minor thread hole 8 towards the top of the ball 5 that is positioned at reception hole 6 bottoms, this minor thread hole 8 forms from the setting in the tangent face of pitch circle of outer thoughtful and this ball of support component 4, and its front tilts downwards.The front end that is combined on the Screw 9 in the minor thread hole 8 along with this Screw along the axial precession of screw thread, and ball 5 is fixed by being pressed in hemispherical or coniform the taking on the face 12 that is formed at reception hole 6 bottoms.
Fig. 4 pushes ball 5 for expression the figure of the 3rd example on the face of taking in 12 that is fixed on the reception hole bottom.In the example of Fig. 4, top towards the ball 5 that is positioned at reception hole 6 bottoms is provided with minor thread hole 8, this minor thread hole 8 forms setting in the tangent face of pitch circle from outer thoughtful and this ball of support component 4, its front tilts downwards, and is provided with from the front end edge thread spindle direction extension in this minor thread hole and the spring patchhole of offering towards reception hole 6 18.After inserting ball 5 in the reception hole 6, volute spring 19 is inserted in the spring patchhole 18, and by making Screw 9 precessions that are combined in the minor thread hole 8 that its front end is pushed volute spring 19, thereby volute spring 19 is compressed, and by this elastic force ball 5 is fixed by being pressed in hemispherical or coniform the taking on the face 12 that is formed at the reception hole bottom.
By supporting on each ball 5 that detects pin 1, a minor thread hole 8 and spring patchhole 18 and Screw 9 and spring 19 are set respectively, and fastening these Screws 9, thereby make six balls 5 and the bottom surface of separately reception hole 6 between do not press from both sides layers such as establishing sticker and directly be fixed on the ad-hoc location under the state of butt.That is, in structure of the present invention, there is no need to use sticker when being fixed in ball 5 on the reception hole bottom 12.And, same with existing structure, by supporting three supporting legs 3, thereby keep detecting the settling position of the test side 13 of pin 1 front end with six balls 5 that are individually fixed on the ad-hoc location.
Claims (3)
1. contact detector, this contact detector has: detect pin, it contacts with the detected object thing; Three supporting legs, it extends along the radiation direction from the base portion that this detects pin; Two is three groups of balls of one group, and it is formed for taking in the incorporating section of each supporting leg; Support component, it supports described detection pin by means of this ball; And back-moving spring, its to described supporting leg to the described incorporating section application of force,
Described ball is positioned in the hemispherical or cone shape of ball reception hole that is formed in the described support component and takes on the face,
This contact detector is characterised in that,
This contact detector has respectively from the periphery of described support component towards the minor thread hole of six the described balls face of taking in opposition side separately and be screwed together in Screw these minor thread holes respectively,
The front end of each Screw directly is crimped on taking on the face of each ball with pairing ball, and does not accompany adhering agent layer.
2. contact detector as claimed in claim 1 is characterized in that,
Described support component is the hollow cylindrical support component that has for detecting the hollow hole that pin runs through, and described minor thread hole is located in the face with the central axis quadrature of this support component, and the front end of described Screw has the dome conical surface that side face contacts with ball.
3. contact detector, this contact detector has: detect pin, it contacts with the detected object thing; Three supporting legs, it extends along the radiation direction from the base portion that this detects pin; Two is three groups of balls of one group, and it is formed for taking in the incorporating section of each supporting leg; Support component, it supports described detection pin by means of this ball; And back-moving spring, its to described supporting leg to the described incorporating section application of force,
Described ball is positioned in the hemispherical or cone shape of ball reception hole that is formed in the described support component and takes on the face,
This contact detector is characterised in that,
This contact detector has respectively from the periphery of described support component towards the spring patchhole of six the described balls face of taking in opposition side separately and insert the spring that these springs insert in the hole respectively,
The front end of each spring directly is crimped on taking on the face of each ball with pairing ball, and does not accompany adhering agent layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP195900/2006 | 2006-07-18 | ||
| JP2006195900 | 2006-07-18 | ||
| PCT/JP2007/064100 WO2008010492A1 (en) | 2006-07-18 | 2007-07-17 | Contact detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101490500A CN101490500A (en) | 2009-07-22 |
| CN101490500B true CN101490500B (en) | 2010-12-01 |
Family
ID=38956823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800257729A Expired - Fee Related CN101490500B (en) | 2006-07-18 | 2007-07-17 | Contact detector |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5133884B2 (en) |
| CN (1) | CN101490500B (en) |
| WO (1) | WO2008010492A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5936199B2 (en) * | 2011-04-05 | 2016-06-22 | 日新産業株式会社 | Position detector |
| EP2657642A1 (en) * | 2012-04-24 | 2013-10-30 | Hexagon Technology Center GmbH | Sensor element for a measuring machine, in particular a coordinate measuring machine |
| CN112902837A (en) * | 2020-12-29 | 2021-06-04 | 山西裕鼎精密科技有限公司 | Knife detection instrument and knife detection method applied to same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357403A (en) * | 2001-05-31 | 2002-12-13 | Mitsutoyo Corp | Signal processing device and signal processing method for touch signal probe |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55492A (en) * | 1972-09-21 | 1980-01-05 | Rolls Royce | Measuring probe |
| JPH0810133B2 (en) * | 1986-07-17 | 1996-01-31 | 宣夫 福久 | Position detector |
| JPS63263406A (en) * | 1987-04-21 | 1988-10-31 | Mitsutoyo Corp | Touch signal probe |
-
2007
- 2007-07-17 CN CN2007800257729A patent/CN101490500B/en not_active Expired - Fee Related
- 2007-07-17 JP JP2008525863A patent/JP5133884B2/en active Active
- 2007-07-17 WO PCT/JP2007/064100 patent/WO2008010492A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357403A (en) * | 2001-05-31 | 2002-12-13 | Mitsutoyo Corp | Signal processing device and signal processing method for touch signal probe |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008010492A1 (en) | 2008-01-24 |
| JP5133884B2 (en) | 2013-01-30 |
| CN101490500A (en) | 2009-07-22 |
| JPWO2008010492A1 (en) | 2009-12-17 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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