CN102809342A - Aligning mechanism for arc radius measuring device - Google Patents
Aligning mechanism for arc radius measuring device Download PDFInfo
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- CN102809342A CN102809342A CN2012102353884A CN201210235388A CN102809342A CN 102809342 A CN102809342 A CN 102809342A CN 2012102353884 A CN2012102353884 A CN 2012102353884A CN 201210235388 A CN201210235388 A CN 201210235388A CN 102809342 A CN102809342 A CN 102809342A
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- heartstrings
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- 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 be used to measure length less than the measurement mechanism of the arc radius of 1/2nd circumference to concentric mechanism.
Background technology
The circular arc part that occurs small semicircle on the market through regular meeting is because the circular arc of these parts less than semicircle, therefore needs special measurer carry out radius measurement to it.Existing measurement mechanism such as Chinese patent CN 2081971U disclosed a kind of " inner arc radius measuring instrument "; This measuring instrument comprises that main scale, secondary chi and adjustment are secondary; The circular arc center of circle in secondary chi is used for confirming; Main scale is used to measure inner arc radius, and the adjustment pair is used for connecting, adjusts, fixes major and minor chi and indication reading value.Wherein secondary chi comprises crossfoot and perpendicular chi, and crossfoot has the measurement rib point that being used for of being provided with at interval contact 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 confirm the center of circle of arc surface to be measured, treat the radius of surveying arc surface through scale on the main scale then and measure.
The problem that existing measuring instrument exists is: when concrete measuring operation; Need survey crew that two secondary chis and main scale are located respectively, it is big to measure labour intensity, and measuring process is loaded down with trivial details; At least will use plural operating personnel in the time of most of and measure, cost of labor is higher; Simultaneously, this employing is measured the rib point and is confirmed the center of circle, and then obtains 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 big, measure the rib point even process; After repeatedly using, measure rib point and also can be worn into cambered surface, and be vertically to divide two lines of measuring rib point equally at the beginning of the making of montant; Therefore the montant of this moment and the out of plumb line of dividing two points that contacts with circular arc to be measured on the cross bar equally, so the determined center of circle of secondary chi just has deviation with the true center of circle of circular arc to be measured, finally causes measurement result inaccurate.
Summary of the invention
The object of the present invention is to provide a kind ofly, can not accurately confirm the problem in the center of circle of circular arc to be measured to solve existing arc radius measurement mechanism to concentric mechanism.
In order to address the above problem, technical scheme of the present invention is:
Be used for the arc radius measurement mechanism to concentric mechanism; Comprise when using and be installed on the percentage gauge stand on the corresponding secondary chi through secondary chi axle rotation; On the said percentage gauge stand dial gauge with dial gauge sounding rod is installed; Said dial gauge is provided with the secondary chi measurement section that is used for corresponding arc surface contact matching to be measured away from an end end of corresponding dial gauge; Also be provided with the heartstrings piece on the said percentage gauge stand, said have the radially both sides that are distributed in said secondary chi axle and be used for string piece with corresponding arc surface contact matching to be measured to heart portion the heartstrings piece, and the center line of said dial gauge sounding rod is vertically divided the line of two string pieces to heart portion equally.
Described to the heartstrings piece along the axially directed slidable fit of said dial gauge sounding rod on described percentage gauge stand; Described percentage gauge stand and said is furnished with to the heartstrings piece being applied towards away from the elastic component of dial gauge direction thrust top between the heartstrings piece, also is provided with on the described percentage gauge stand and cooperates so that heartstrings piece court is moved spacing position limiting structure away from the dial gauge direction reply heartstrings piece is spacing.
Described elastic component is made up of torsion spring.
Described position limiting structure comprises the backing pin that is arranged in the corresponding percentage gauge stand and is arranged at the slotted hole on the 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: through secondary chi axle respectively rotate the secondary chi that be installed on correspondence on to concentric mechanism this during use; During measurement; Earlier through to table block to dial gauge to zero; When zero process was made the dial gauge zero graduation, each secondary chi measurement section to concentric mechanism was in above the circular arc identical with arc surface radius to be measured heart portion with corresponding two string pieces, and main scale measurement section and the arc surface to be measured with main scale is adjacent to then; Each string piece to concentric mechanism is adjacent to heart portion and arc surface to be measured; And, when the reading of dial gauge is zero, explain that each has just constituted a string of arc surface to be measured to the contact point line of heart portion and arc surface to be measured to two corresponding string pieces of heartstrings piece to the heartstrings piece being advanced shape rotation adjustment; The center line bearing of trend of dial gauge sounding rod is crossed the center of circle of arc surface to be measured at this moment; The montant of vertically dividing main scale axle and secondary chi axle line equally is just also crossed the center of circle of arc surface to be measured, and the intersection location of such two montants has just been confirmed the home position of arc surface to be measured, thereby can measure the radius of arc surface to be measured accurately.Montant of the present invention is a center line line of vertically dividing main scale axle and secondary chi axle equally at the beginning of making, the deviation that in long-term use, can not occur measuring; Through using the center of circle of the center line of heartstrings piece assurance dial gauge sounding rod being crossed arc surface to be measured, guarantee that further 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 when touching arc surface to be measured, and the relative position of main scale and secondary chi is not because because if the problem of feel has the measurement mechanism demonstration can produce certain measuring errors.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention user mode;
Fig. 2 is the structural representation of cross bar among Fig. 1;
Fig. 3 is the B place enlarged drawing among Fig. 1;
Fig. 4 is the A place enlarged drawing among Fig. 1;
Fig. 5 is the rear view of Fig. 4;
Fig. 6 is the D place enlarged drawing among Fig. 5;
Fig. 7 is the synoptic diagram that cooperates of cross bar and chord-foot seat among Fig. 5;
Fig. 8 is a measuring principle synoptic diagram of the present invention;
Fig. 9 is the structural representation of montant among Fig. 1;
Figure 10 is the vertical view of Fig. 9;
Figure 11 is the structural representation of main scale among Fig. 1;
Figure 12 is the structural representation of low sleeve part among Fig. 6;
Figure 13 is the vertical view of Figure 12;
Figure 14 is the structural representation of upper sliding sleeve part among Fig. 6;
Figure 15 is the vertical view of Figure 14;
Figure 16 is to the structural representation of concentric mechanism seat among 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 among 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 among Fig. 1;
Figure 21 is to the structural representation of heartstrings piece among Fig. 1;
Figure 22 is the side view of Figure 21.
Embodiment
Be used for the arc radius measurement mechanism to the embodiment of concentric mechanism shown in Fig. 1 ~ 22: concentric mechanism comprised be arranged at secondary chi axle 51 that axially extends along the vertical direction on the corresponding cross bar 6 and the percentage gauge stand 16 that is rotatably assorted with corresponding secondary chi axle 51.Dial gauge 10 with dial gauge sounding rod is installed on the percentage gauge stand 16; The dial gauge sounding rod is provided with the secondary chi measurement section 21 that is used for arc surface 5 contact matching to be measured away from an end of corresponding dial gauge 10; Percentage gauge stand 16 is provided with and is used for corresponding table block 15 being cooperated and dial gauge being carried out the curved portions to zero; Also be provided with on the percentage gauge stand 16 heartstrings piece 14; Heartstrings piece 14 is had respectively at the radially both sides of the secondary chi axle 51 of correspondence and is used for string piece with corresponding arc surface 5 contact matching to be measured to heart portion 19; The center line of dial gauge sounding rod is vertically divided the line of corresponding two string pieces to heart portion 19 equally; Each to heartstrings piece 14 along the axially directed slidable fit of corresponding dial gauge sounding rod on the percentage gauge stand 16 of correspondence; Corresponding percentage gauge stand 16 with top between the heartstrings piece 14 is furnished with to heartstrings piece 14 being applied towards the elastic component away from corresponding dial gauge 10 direction thrusts, elastic component is made up of torsion spring 22, also be provided with on the percentage gauge stand 16 with to tackling heartstrings piece 14 spacing cooperations so that heartstrings piece 14 courts are moved spacing position limiting structure away from corresponding dial gauge 10 directions; Position limiting structure comprises the backing pin that is arranged in the corresponding percentage gauge stand 16 18 and is arranged at the slotted hole on the reply heartstrings piece 14, and 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.
To be installed on the arc radius measurement mechanism concentric mechanism during use; The arc radius measurement mechanism comprises main scale 9, adjustment pair and is arranged at the left secondary chi 4 and the right secondary chi 8 of main scale 9 left and right sides that the front end end of main scale 9 is provided with the main scale measurement section that is used for arc surface 5 contact matching to be measured.Each secondary chi includes cross bar 6 and montant 3; Montant 3 is fixedly linked with cross bar 6 through the jackscrew 12 and the pin 11 of cutting edge; The abutting end of the cross bar 6 of two secondary chis all is fixed with chord-foot seat 7 through cross bar nut 13, and each chord-foot seat 7 all is hinged and connected with main scale 9 front ends through the main scale axle 28 that pivot center extends along the vertical direction.Each is arranged on each cross bar 6 end away from main scale 9 respectively to concentric mechanism, 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 constitute by corresponding arcwall face heart portion.Secondary comprising along main scale 9 length directions led slidable fit in the sliding sleeve 1 of main scale 9 rear ends in adjustment, and 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, is threaded in the threaded hole to be useful on to slide on the main scale when sliding the sliding sleeve set nut that sliding sleeve is carried out locking positioning.Being rotatably equipped with first pivoted housing 24 and second pivoted housing, 25, the first pivoted housings 24 and second pivoted housing 25 in the downside of main scale on the sliding sleeve is arranged on the sliding sleeve through first compressing tablet 26 and second compressing tablet 27.Offer first through hole that montant 3 rear ends that supply left secondary chi 4 are passed in first pivoted housing 24, offer second through hole that the montant rear end that supplies right secondary chi 8 is passed in second pivoted housing 25.Upside in main scale on the sliding sleeve 1 is provided with the press strip 30 that has the press strip scale, and main scale 9 is provided with the main scale scale that cooperates 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 adjustment screw, screw mechanism; Screw 32 in adjustment screw, the screw mechanism is arranged on the adjustment component 29; Leading screw 31 in adjustment screw, the screw mechanism is in transmission connection with sliding sleeve 1; Adjustment component 29 on main scale 9, also is provided with when said adjustment component guiding slip the adjustment component set nut that adjustment component 29 is carried out locking positioning along fore-and-aft direction guiding slidable fit between main scale 9 and the said adjustment component 29.
During concrete the measurement,, select suitable secondary chi to install on the main scale 9 according to the size of workpiece; Use is adjacent to the curved portions of percentage gauge stand to table block 15 concave surfaces, 10 pairs zero of dial gauges, behind 10 pairs zero of the dial gauges; Each secondary chi measurement section to concentric mechanism is in above the circular arc identical with arc surface radius to be measured heart portion with corresponding two string pieces; 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 the adjustment component 29 rotates; Leading screw 31 promotes sliding sleeve 1 and moves forward, and the montant 3 that drives secondary chi rotates with cross bar 6 relative main scale axles 28, and the montant 3 of secondary chi main scale 9 rotations relatively can slide in the pivoted housing of correspondence again; When the indicator of two dial gauges 10 adjusted to zero, at this moment the reading on the main scale 9 was exactly the radius size of this workpiece for measurement.The effect of dial gauge is can record in secondary chi measurement section to rigidly connect (because the problem of feel when touching arc surface to be measured; Will produce certain error if only touch arc surface to be measured with the dial gauge seated connection) 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 percentage gauge stand, so consistent to the curved portions radius of the radius of the concave surface of table block and percentage gauge stand.Certainly this is just wherein a kind of comparatively special in zero form; In other embodiments of the invention; The curved portions of percentage gauge stand can not established yet; Can have identically with arc surface internal diameter to be measured through adopting one, the inner concave to table block contacted zero to zero the time with the secondary chi measurement section of dial gauge sounding rod with two corresponding string pieces to heart portion table block.The measuring principle of present embodiment is as shown in Figure 8: by seeing G, 2 contact points for secondary chi measurement section and corresponding arc surface to be measured of F among the figure, the H point is the contact point of main scale measurement section and corresponding arc surface to be measured; X, 2 axis of representing corresponding secondary chi axle respectively of Z, the Y point is represented the axis of main scale axle; OS and OK represent the center line of the montant of left and right secondary chi respectively.OS vertically divides XY equally, and OK vertically divides YZ equally, and G, H, 3 place circles of F belong to circle with X, Y, 3 of Z and are concentric circles, and when the center line of dial gauge sounding rod was crossed the center of circle of arc surface to be measured, the center line of each montant industry can be crossed the center of circle of arc surface to be measured.Among the present invention is the center of circle of crossing arc surface to be measured for the center line that guarantees the dial gauge sounding rod to the heartstrings piece, is difficult for the problem confirmed through the perpendicular bisector that the heartstrings piece has also been solved line between two cambered surfaces simultaneously.
In other embodiments of the invention: each montant can also one set firmly or be fixedly connected through being welded to connect with corresponding cross bar; Concentric mechanism seat chord rod support all can not had, this moment cross bar can be directly and main scale be hinged and connected, the percentage gauge stand also can directly rotate and be assemblied on the cross bar; Sliding sleeve can not have yet, and adjustment this moment is secondary can be comprised the slotted hole that is opened on each montant and the main scale and be arranged at the measurement pin in the slotted hole; Torsion spring can also be replaced by post spring or folded spring; The limited step that position limiting structure can also be set on the percentage gauge stand replaces.
Claims (4)
1. be used for the arc radius measurement mechanism to concentric mechanism; It is characterized in that: comprise when using being installed on the percentage gauge stand on the corresponding secondary chi through secondary chi axle rotation; On the said percentage gauge stand dial gauge with dial gauge sounding rod is installed; Said dial gauge is provided with the secondary chi measurement section that is used for corresponding arc surface contact matching to be measured away from an end end of corresponding dial gauge; Also be provided with the heartstrings piece on the said percentage gauge stand, said have the radially both sides that are distributed in said secondary chi axle and be used for string piece with corresponding arc surface contact matching to be measured to heart portion the heartstrings piece, and the center line of said dial gauge sounding rod is vertically divided the line of two string pieces to heart portion equally.
2. according to claim 1 to concentric mechanism; It is characterized in that: described to the heartstrings piece along the axially directed slidable fit of said dial gauge sounding rod on described percentage gauge stand; Described percentage gauge stand and said is furnished with to the heartstrings piece being applied towards away from the elastic component of dial gauge direction thrust top between the heartstrings piece, also is provided with on the described percentage gauge stand and cooperates so that heartstrings piece court is moved spacing position limiting structure away from the dial gauge direction reply heartstrings piece is spacing.
3. according to claim 2 to concentric mechanism, it is characterized in that: described elastic component is made up of torsion spring.
4. according to claim 2 to concentric mechanism; It is characterized in that: described position limiting structure comprises the backing pin that is arranged in the corresponding percentage gauge stand and is arranged at the slotted hole on the 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 true CN102809342A (en) | 2012-12-05 |
| CN102809342B CN102809342B (en) | 2013-12-11 |
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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 |
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| CN (1) | CN102809342B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655204A (en) * | 2019-01-21 | 2019-04-19 | 北京通成达水务建设有限公司 | Sealing for tubing joints detection structure |
| CN111735364A (en) * | 2020-08-17 | 2020-10-02 | 广东电网有限责任公司东莞供电局 | Electric power heavy-calibre pipeline size measurement device |
| CN113551581A (en) * | 2021-07-16 | 2021-10-26 | 钱源 | Direct-reading type electric power large-caliber pipeline inner diameter measuring device |
| CN114993142A (en) * | 2022-06-30 | 2022-09-02 | 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655204A (en) * | 2019-01-21 | 2019-04-19 | 北京通成达水务建设有限公司 | Sealing for tubing joints detection structure |
| CN111735364A (en) * | 2020-08-17 | 2020-10-02 | 广东电网有限责任公司东莞供电局 | Electric power heavy-calibre pipeline size measurement device |
| 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 |
| CN113551581A (en) * | 2021-07-16 | 2021-10-26 | 钱源 | Direct-reading type electric power large-caliber pipeline inner diameter measuring device |
| CN114993142A (en) * | 2022-06-30 | 2022-09-02 | 奇瑞汽车股份有限公司 | Automobile ground clearance measuring tool and measuring method |
| 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 |
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| Publication number | Publication date |
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| CN102809342B (en) | 2013-12-11 |
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