CN102809342B - Aligning mechanism for arc radius measuring device - Google Patents
Aligning mechanism for arc radius measuring device Download PDFInfo
- Publication number
- CN102809342B CN102809342B CN2012102353884A CN201210235388A CN102809342B CN 102809342 B CN102809342 B CN 102809342B CN 2012102353884 A CN2012102353884 A CN 2012102353884A CN 201210235388 A CN201210235388 A CN 201210235388A CN 102809342 B CN102809342 B CN 102809342B
- Authority
- CN
- China
- Prior art keywords
- piece
- heartstrings
- dial indicator
- dial gauge
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention relates to an aligning mechanism for an arc radius measuring device. The aligning mechanism comprises a dial indicator seat which is rotatably arranged on a corresponding auxiliary scale through an auxiliary scale shaft during use; dial indicators with dial indicator measuring rods are arranged on the dial indicator seat; an auxiliary scale measuring part which is contacted and with a corresponding arc surface to be measured is arranged at one end, which is far away from the opposite dial indicator, of each dial indicator; the dial indicator seat is also provided with an aligning chord block; the aligning chord block is provided with chord block aligning parts which are distributed on two radial sides of the auxiliary scale shaft and are contacted and matched with the corresponding arc surface to be measured; and a center line of the dial indicator measuring rods perpendicularly divides a connecting line of the two chord block aligning parts equally. The aligning mechanism solves the problem that the conventional arc radius measuring device cannot accurately determine the circle center of an arc to be measured.
Description
Technical field
The present invention relates to a kind of concentric mechanism of measurement mechanism that is less than the arc radius of 1/2nd circumference for measuring length.
Background technology
The circular arc part that often there will be small semicircle on market, because the circular arc of these parts is less than semicircle, therefore need special measurer carry out radius measurement to it.Existing measurement mechanism as disclosed as Chinese patent CN 2081971U a kind of " inner arc radius measuring instrument ", this measuring instrument comprises main scale, secondary chi and adjusts secondary, secondary chi is for the circular arc center of circle in determining, main scale is for measuring inner arc radius, and adjustment is secondary for connecting, adjust, fix major and minor chi and indication reading value.Wherein secondary chi comprises crossfoot and perpendicular chi, and crossfoot has the spaced measurement rib point for contacting with arc surface to be measured, and perpendicular chi is vertically divided the line of 2 measurement rib points equally.During measurement, theorem according to " perpendicular bisector of circle string must pass through the center of circle ", the correspondence measurement rib point of two crossfoots is contacted with arc surface to be measured respectively, thereby determine the center of circle of arc surface to be measured, then by scale on main scale, treat the radius of surveying arc surface and measured.
The problem that existing measuring instrument exists is: when concrete measurement operation, need survey crew to locate respectively two secondary chis and main scale, measure labour intensity large, measuring process is loaded down with trivial details, at least will use plural operating personnel in the time of most of and be measured, cost of labor is higher, simultaneously, this employing is measured the rib point and is determined the center of circle, and then obtain the measurement form of arc radius, be theoretic feasible in fact, when concrete operations, basic being difficult to realized, because, the difficulty of processing of measuring rib point is very large, measure the rib point even process, after repeatedly using, measure rib point and also can be worn into cambered surface, and at the beginning of the making of montant, be vertically to divide two lines of measuring rib point equally, therefore the line that montant now out of plumb are divided two points that contact with circular arc to be measured on cross bar equally, therefore just there is deviation in the determined center of circle of secondary chi with the true center of circle of circular arc to be measured, finally cause measurement result inaccurate.
Summary of the invention
The object of the present invention is to provide a kind of concentric mechanism, to solve existing arc radius measurement mechanism, can not accurately determine the problem in the center of circle of circular arc to be measured.
In order to address the above problem, technical scheme of the present invention is:
Concentric mechanism for the arc radius measurement mechanism, comprise while using and rotate and be installed on the dial indicator holder on corresponding secondary chi by secondary chi axle, dial gauge with dial gauge sounding rod is installed on described dial indicator holder, described dial gauge is provided with away from an end end of corresponding dial gauge the secondary chi measurement section coordinated for contacting with corresponding arc surface to be measured, on described dial indicator holder, also be provided with the heartstrings piece, described have the radially both sides that are distributed in described secondary chi axle and for contacting the string piece that coordinates with corresponding arc surface to be measured to heart section to the heartstrings piece, the center line of described dial gauge sounding rod is vertically divided the line of two string pieces to heart section equally.
Described to the heartstrings piece along the axially directed slidable fit of described dial gauge sounding rod on described dial indicator holder, described dial indicator holder and described top between the heartstrings piece is furnished with to the heartstrings piece being applied towards away from the elastic component of dial gauge direction thrust, on described dial indicator holder, also be provided with and to reply heartstrings piece spacing coordinate to the heartstrings piece towards away from the dial gauge direction, moving spacing position limiting structure.
Described elastic component consists of torsion spring.
Described position limiting structure comprises the backing pin that is arranged in corresponding dial indicator holder and is arranged at the slotted hole on reply heartstrings piece, and it is peripheral and have a hole wall with the spacing cooperation of corresponding backing pin that described slotted hole is sheathed on corresponding backing pin.
Beneficial effect of the present invention is: during use, this concentric mechanism is rotated respectively and is installed on corresponding secondary chi by secondary chi axle, during measurement, first by table block to dial gauge to zero, when zero process is made to the dial gauge zero graduation, the secondary chi measurement section of each concentric mechanism and corresponding two string pieces to heart section above the circular arc identical with arc surface radius to be measured, then the main scale measurement section of main scale and arc surface to be measured are adjacent to, the string piece of each concentric mechanism is adjacent to heart section and arc surface to be measured, and rotate adjustment to the heartstrings piece being advanced to shape, when the reading of dial gauge is zero, illustrate that each two string pieces corresponding to the heartstrings piece have just formed a string of arc surface to be measured to the contact point line of heart section and arc surface to be measured, now the center line bearing of trend of dial gauge sounding rod is crossed the center of circle of arc surface to be measured, vertically divide the montant of main scale axle and secondary chi axle line equally and just also cross the center of circle of arc surface to be measured, the intersection location of such two montants has just been determined the home position of arc surface to be measured, thereby can measure accurately the radius of arc surface to be measured.Montant of the present invention is the center line line of vertically dividing main scale axle and secondary chi axle equally at the beginning of making, and not there will be the deviation of measurement in long-term use procedure; By using the center of circle of the center line of heartstrings piece assurance dial gauge sounding rod being crossed to arc surface to be measured, further guarantee that the center line of montant is crossed the center of circle.The effect of dial gauge is can record in secondary chi measurement section to rigidly connect while touching arc surface to be measured, and the relative position of main scale and secondary chi, if because because the problem of feel does not have the measurement mechanism demonstration can produce certain measuring error.
The accompanying drawing explanation
Fig. 1 is the structural representation that the embodiment of the present invention is used state;
Fig. 2 is the structural representation of cross bar in Fig. 1;
Fig. 3 is the B place enlarged drawing in Fig. 1;
Fig. 4 is the A place enlarged drawing in Fig. 1;
Fig. 5 is the rear view of Fig. 4;
Fig. 6 is the D place enlarged drawing in Fig. 5;
Fig. 7 is the schematic diagram that coordinates of cross bar and chord-foot seat in Fig. 5;
Fig. 8 is measuring principle schematic diagram of the present invention;
Fig. 9 is the structural representation of montant in Fig. 1;
Figure 10 is the vertical view of Fig. 9;
Figure 11 is the structural representation of main scale in Fig. 1;
Figure 12 is the structural representation of low sleeve part in Fig. 6;
Figure 13 is the vertical view of Figure 12;
Figure 14 is the structural representation of upper sliding sleeve part in Fig. 6;
Figure 15 is the vertical view of Figure 14;
Figure 16 is the structural representation of concentric mechanism seat in Fig. 1;
Figure 17 is that the E of Figure 16 is to cut-open view;
Figure 18 is the structural representation of chord-foot seat in Fig. 1;
Figure 19 is that the C of Figure 18 is to cut-open view;
Figure 20 is the structural representation of cross bar in Fig. 1;
Figure 21 is to the structural representation of heartstrings piece in Fig. 1;
Figure 22 is the side view of Figure 21.
Embodiment
For the embodiment of the concentric mechanism of arc radius measurement mechanism as shown in Fig. 1 ~ 22: concentric mechanism comprises and is arranged at the secondary chi axle 51 axially extended along the vertical direction on corresponding cross bar 6 and the dial indicator holder 16 be rotatably assorted with corresponding secondary chi axle 51.Dial gauge 10 with dial gauge sounding rod is installed on dial indicator holder 16, the dial gauge sounding rod is provided with away from an end of corresponding dial gauge 10 the secondary chi measurement section 21 coordinated for contacting with arc surface 5 to be measured, on dial indicator holder 16, be provided with for corresponding, table block 15 being coordinated and dial gauge is carried out to the curved portions to zero, on dial indicator holder 16, also be provided with heartstrings piece 14, heartstrings piece 14 is had respectively at the radially both sides of the secondary chi axle 51 of correspondence and for contacting the string piece that coordinates with corresponding arc surface 5 to be measured to heart section 19, the center line of dial gauge sounding rod is vertically divided the line of corresponding two string pieces to heart section 19 equally, each to heartstrings piece 14 along the axially directed slidable fit of corresponding dial gauge sounding rod on corresponding dial indicator holder 16, corresponding dial indicator holder 16 with top between heartstrings piece 14 is furnished with to heartstrings piece 14 being applied to the elastic component of court away from corresponding dial gauge 10 direction thrusts, elastic component consists of torsion spring 22, on dial indicator holder 16, also be provided with to reply heartstrings piece 14 spacing cooperations to heartstrings piece 14 towards away from corresponding dial gauge 10 directions, moving spacing position limiting structure, position limiting structure comprises the backing pin 18 be arranged in corresponding dial indicator holder 16 and is arranged at the slotted hole on reply heartstrings piece 14, it is peripheral and have a hole wall with corresponding backing pin 18 spacing cooperations that slotted hole is sheathed on corresponding backing pin 18.
During use, concentric mechanism is installed on the arc radius measurement mechanism, the arc radius measurement mechanism comprises main scale 9, it is secondary to adjust and be arranged at left secondary chi 4 and the right secondary chi 8 of main scale 9 left and right sides, and the front end end of main scale 9 is provided with for contact the main scale measurement section of cooperation with arc surface 5 to be measured.Each secondary chi includes cross bar 6 and montant 3, montant 3 is fixedly linked with cross bar 6 by jackscrew 12 and trimming pin 11, the abutting end of the cross bar 6 of two secondary chis all is fixed with chord-foot seat 7 by cross bar nut 13, and main scale axle 28 and main scale 9 front ends that each chord-foot seat 7 all extends along the vertical direction by pivot center are hinged and connected.Each concentric mechanism is arranged at respectively on each cross bar 6 end away from main scale 9, and the center line of each montant 3 is vertically divided the line of main scale axle 28 and corresponding secondary chi axle 51 equally, and main scale measurement section, secondary chi measurement section chord piece form by corresponding arcwall face heart section.Adjust secondary comprising along main scale 9 length directions and lead slidable fit in the sliding sleeve 1 of main scale 9 rear ends, sliding sleeve 1 comprises upper and lower spiral-lock low sleeve part 1-1 and upper sliding sleeve 1-2 part together.Sliding sleeve 1 is provided with the threaded hole that runs through its right side, in threaded hole, is threaded to be useful on to slide on main scale the sliding sleeve set nut that while sliding, sliding sleeve is carried out locking positioning.Being rotatably equipped with the first pivoted housing 24 and the second pivoted housing 25, the first pivoted housings 24 and the second pivoted housing 25 in the downside of main scale on sliding sleeve is arranged on sliding sleeve by the first compressing tablet 26 and the second compressing tablet 27.Offer the first through hole passed for montant 3 rear ends of left secondary chi 4 in the first pivoted housing 24, offer the second through hole passed for the montant rear end of right secondary chi 8 in the second pivoted housing 25.Upside in main scale on sliding sleeve 1 is provided with the press strip 30 with the press strip scale, and main scale 9 is provided with the main scale scale that coordinates reading with the press strip scale.The rear end of main scale 1 also is provided with adjustment component 29, the arc radius measurement mechanism also comprises adjusts screw, screw mechanism, the screw 32 of adjusting in screw, screw mechanism is arranged on adjustment component 29, the leading screw 31 of adjusting in screw, screw mechanism is in transmission connection with sliding sleeve 1, adjustment component 29 on main scale 9, also is provided with the adjustment component set nut that adjustment component 29 is carried out locking positioning when described adjustment component guiding is slided along fore-and-aft direction guiding slidable fit between main scale 9 and described adjustment component 29.
During concrete the measurement, size according to workpiece, select suitable secondary chi to install on main scale 9, use is adjacent to the curved portions of dial indicator holder to table block 15 concave surfaces, 10 pairs zero of dial gauges, after 10 pairs zero of dial gauges, the secondary chi measurement section of each concentric mechanism and corresponding two string pieces to heart section above the circular arc identical with arc surface radius to be measured, take down table block 5, sliding sleeve 1 is adjusted to the position that is slightly larger than workpiece, again the summit of the main scale of main scale 9 location cambered surface and the arc surface to be measured 5 of workpiece for measurement are adjacent to, screw 32 on adjustment component 29 rotates, leading screw 31 promotes sliding sleeve 1 and moves forward, the montant 3 that drives secondary chi rotates relative to main scale axle 28 with cross bar 6, the montant 3 of secondary chi can rotate and can slide in corresponding pivoted housing relative to main scale 9, when the indicator of two dial gauges 10 adjusts to zero, at this moment the reading on main scale 9 is exactly the radius size of this workpiece for measurement.The effect of dial gauge is can record when secondary chi measurement section rigidly connects tactile arc surface to be measured (due to the problem of feel, if only with dial indicator holder contact measured arc surface, will produce certain error) relative position of main scale and secondary chi, the position that the dial gauge sounding rod stretches out should be on the curved portions of dial indicator holder, so consistent to the curved portions radius of the radius of the concave surface of table block and dial indicator holder.Certainly this is just wherein a kind of comparatively especially to zero form, in other embodiments of the invention, the curved portions of dial indicator holder can not established yet, can have identically with arc surface internal diameter to be measured to table block by adopting one, make the inner concave of table block is contacted zero heart section with two corresponding string pieces with the secondary chi measurement section of dial gauge sounding rod to zero the time.The measuring principle of the present embodiment is as shown in Figure 8: can see G, 2 contact points for secondary chi measurement section and corresponding arc surface to be measured of F in figure, the contact point that the H point is main scale measurement section and corresponding arc surface to be measured; X, 2 axis that represent respectively corresponding secondary chi axle of Z, the Y point represents the axis of main scale axle; OS and OK represent respectively the center line of the montant of left and right secondary chi.OS vertically divides XY equally, and OK vertically divides YZ equally, and G, H, 3 place circles of F are concentric circles with X, Y, 3 place circles of Z, and when the center line of dial gauge sounding rod is crossed the center of circle of arc surface to be measured, the center line industry of each montant can be crossed the center of circle of arc surface to be measured.In the present invention is the center of circle that center line in order to guarantee the dial gauge sounding rod is crossed arc surface to be measured to the heartstrings piece, is difficult for definite problem by the perpendicular bisector that the heartstrings piece has also been solved to line between two cambered surfaces simultaneously.
In other embodiments of the invention: each montant can also one set firmly or be fixedly connected with by being welded to connect with corresponding cross bar; Concentric mechanism seat chord rod support all can not have, now cross bar can be directly and main scale be hinged and connected, dial indicator holder also can directly rotate and be assemblied on cross bar; Sliding sleeve can not have yet, and now adjusts pair and can comprise the slotted hole be opened on each montant and main scale and be arranged at the measurement pin in slotted hole; Torsion spring can also be replaced by post spring or folded spring; The limited step that position limiting structure can also be arranged on dial indicator holder replaces.
Claims (3)
1. for the concentric mechanism of arc radius measurement mechanism, it is characterized in that: comprise while using and rotate and be installed on the dial indicator holder on corresponding secondary chi by secondary chi axle, dial gauge with dial gauge sounding rod is installed on described dial indicator holder, described dial gauge is provided with away from an end end of corresponding dial gauge the secondary chi measurement section coordinated for contacting with corresponding arc surface to be measured, on described dial indicator holder, also be provided with the heartstrings piece, described have the radially both sides that are distributed in described secondary chi axle and for contacting the string piece that coordinates with corresponding arc surface to be measured to heart section to the heartstrings piece, the center line of described dial gauge sounding rod is vertically divided the line of two string pieces to heart section equally, described to the heartstrings piece along the axially directed slidable fit of described dial gauge sounding rod on described dial indicator holder, described dial indicator holder and described top between the heartstrings piece is furnished with to the heartstrings piece being applied towards away from the elastic component of dial gauge direction thrust, also be provided with on described dial indicator holder and coordinate so that heartstrings piece court is moved to spacing position limiting structure away from the dial gauge direction reply heartstrings piece is spacing.
2. concentric mechanism according to claim 1, it is characterized in that: described elastic component consists of torsion spring.
3. concentric mechanism according to claim 1, it is characterized in that: described position limiting structure comprises the backing pin that is arranged in corresponding dial indicator holder and is arranged at the slotted hole on reply heartstrings piece, and it is peripheral and have a hole wall with the spacing cooperation of corresponding backing pin that described slotted hole is sheathed on corresponding backing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102353884A CN102809342B (en) | 2012-07-09 | 2012-07-09 | Aligning mechanism for arc radius measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102353884A CN102809342B (en) | 2012-07-09 | 2012-07-09 | Aligning mechanism for arc radius measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102809342A CN102809342A (en) | 2012-12-05 |
| CN102809342B true CN102809342B (en) | 2013-12-11 |
Family
ID=47233123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102353884A Active CN102809342B (en) | 2012-07-09 | 2012-07-09 | Aligning mechanism for arc radius measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102809342B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655204B (en) * | 2019-01-21 | 2020-12-04 | 北京通成达水务建设有限公司 | Pipeline connection sealing performance detection structure |
| CN111735364B (en) * | 2020-08-17 | 2020-11-13 | 广东电网有限责任公司东莞供电局 | Electric power heavy-calibre pipeline size measurement device |
| CN113551581B (en) * | 2021-07-16 | 2023-07-28 | 广东中质检测技术有限公司 | Direct-reading type electric power large-caliber pipeline inner diameter measuring device |
| CN114993142B (en) * | 2022-06-30 | 2023-10-31 | 奇瑞汽车股份有限公司 | Automobile ground clearance measuring tool and measuring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU805056A1 (en) * | 1978-12-11 | 1981-02-15 | Минский Завод "Ударник" | Device for dimension monitoring |
| CN2081971U (en) * | 1990-08-19 | 1991-07-31 | 邓超云 | Radius gauge for internal circular arc |
| CN101979954A (en) * | 2010-10-25 | 2011-02-23 | 南车戚墅堰机车有限公司 | Measuring tool for measuring arc parts |
-
2012
- 2012-07-09 CN CN2012102353884A patent/CN102809342B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU805056A1 (en) * | 1978-12-11 | 1981-02-15 | Минский Завод "Ударник" | Device for dimension monitoring |
| CN2081971U (en) * | 1990-08-19 | 1991-07-31 | 邓超云 | Radius gauge for internal circular arc |
| CN101979954A (en) * | 2010-10-25 | 2011-02-23 | 南车戚墅堰机车有限公司 | Measuring tool for measuring arc parts |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102809342A (en) | 2012-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102818501B (en) | Arc radius measuring device | |
| CN105758360B (en) | A kind of steering bearing blowout patche raceway groove parameter measurement instrument and its measurement method | |
| CN101852582A (en) | Measuring device and measuring method for geometric parameters of inner wall of elbow | |
| CN102809342B (en) | Aligning mechanism for arc radius measuring device | |
| CN203672259U (en) | Shifting fork inspection fixture | |
| CN202329505U (en) | Position error inspection jig | |
| CN102538631A (en) | Bevel gear tooth thickness measurer | |
| CN102962728A (en) | Device for detecting position of center of ball joint | |
| CN204286334U (en) | A kind of deep-slotted chip breaker reading detector | |
| CN202216687U (en) | Gauge of deviation from circular form for hole | |
| CN105444647A (en) | Device for turbine blade crown and boss pitch measurement | |
| CN211262103U (en) | Device for measuring included angle and offset of hole axis in geometric space | |
| CN210981108U (en) | Internal spline tooth top circle diameter inspection fixture | |
| CN201561747U (en) | Special fixture for measuring hobbing cutter of three-coordinate measuring system | |
| CN206095196U (en) | Turn to bearing blowout patche channel parameter measuring instrument | |
| CN201993093U (en) | Piston measuring system and piston measuring device | |
| CN103335578A (en) | A three-point circle-measuring instrument | |
| CN213090669U (en) | Device for measuring verticality between piston pin hole axis and inner gear surface | |
| CN204988093U (en) | Internal diameter lever dial indicator corrector | |
| CN202964282U (en) | Ball head and ball center position detector | |
| CN202614133U (en) | Detection device | |
| CN202582437U (en) | Bevel gear tooth thickness measurer | |
| CN105444723B (en) | Measuring device | |
| CN205482891U (en) | Measuring device | |
| CN203385362U (en) | A three-point circle measurement instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |