CN203518960U - Scratch-proof pneumatic connecting rod measuring instrument - Google Patents
Scratch-proof pneumatic connecting rod measuring instrument Download PDFInfo
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- CN203518960U CN203518960U CN201320596144.9U CN201320596144U CN203518960U CN 203518960 U CN203518960 U CN 203518960U CN 201320596144 U CN201320596144 U CN 201320596144U CN 203518960 U CN203518960 U CN 203518960U
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- measuring head
- connecting rod
- air vents
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- scratch
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Abstract
The utility model discloses a scratch-proof pneumatic connecting rod measuring instrument including a measuring head. The measuring head is cylindrical, the circumference of the measuring head is a cylindrical surface, the end of the front end of the measuring head is an end face; a plurality of measuring nozzles are disposed on the cylindrical surface along the peripheral direction, air vents and inner air vents are included, the air vents are disposed in the end face, the positions of the air vents correspond to that of a signal row measuring head on the end face, and the inner air vents are arranged in the measuring head; and the outside of the measuring head is provided with annular circular holes, and two ends of each of the inner air vents are respectively interconnected with each of the annular circular holes and each of the air vents. According to the scratch-proof pneumatic connecting rod measuring instrument, a steel connecting rod measuring head with a small hole having a copper bush is improved, and outer air vents of an original measuring head are modified into inner air vents; and by cooperating with a connecting rod manufacturer, scratches on the steel connecting rod measuring head with the small hole having the copper bush are distinctly prevented through a lot of on-site production practice.
Description
Technical field
The utility model relates to a kind of link rod measuring appliance.
Background technology
Connecting rod is one of main Force transmission parts of motor car engine, often in high-speed motion state, therefore between requirement and other part, has higher quality of fit.In actual production, normal employing amplified the manufacture of hole tolerance band, assemble and met quality of fit requirement, thereby connecting rod has been detected as in production frequently and don't can missing link by grouping.China's connecting rod detects the normal two kinds of methods that adopt at present, and a kind of is to adopt domestic pneumatic measuring instrument to detect two stomidium aperture value, and measures both centre distance simultaneously, and by the depth of parallelism and the torsion resistance of other measuring point comprehensive evaluation connecting rods of aperture; Be to adopt domestic or import electrical measuring instrument to detect two stomidium aperture value, and measure both centre distance and end face flatness, verticality and the depth of parallelism simultaneously, and by the depth of parallelism and the torsion resistance of aperture measuring point comprehensive evaluation connecting rod.
Electronic link rod measuring appliance is generally to utilize aperture measuring point value, carries out mathematical modeling directly draw two hole centre distance by program; Workpiece does not almost contact with big or small measuring head when entering measuring position, and electronic measurement clearance is large, does not therefore generally scratch workpiece.And Pneumatic connecting rod measuring instrument is generally directly to measure bus distance outside two holes, by mathematical operation, accumulates Aperture deviation and draw two hole centre distance.The outer bus of the general employing of pneumatic gauging of connecting rod two hole centre distance is apart from integration measurement method.
Large measuring head is fixed on datum plate, little measuring head is contained on the slide block that can slide on steel ball guide rail, when workpiece or standard component enter measuring position, cylinder is along K to promoting slide block, and drive little measuring head to move outward, outside size measuring head, bus contacts with the corresponding bus in two holes respectively, and connecting rod two hole centre distance and two aperture synthesis dimensional discrepancys determine the gap s of slide block and nozzle; Gap s by slide block and nozzle is measuring the Δ H reflecting on instrument, two bore dia deviations accumulations just can be calculated to connecting rod two hole deviation of centre distance, thereby draw connecting rod two hole centre distance.
In actual production process, when aperture is different with centre distance, measure or for handled easily, can two bore dia deviations do not accumulated, thereby directly show that connecting rod two hole approximate centers are apart from value; This value uncertainty is bigger than normal than the uncertainty of above-mentioned actual value, depends on two aperture actual deviations, and maximum uncertainty is relevant with two hole tolerances.
Yet, when workpiece enters measuring position, cylinder is along K to promoting slide block, and drive little measuring head to move outward, outside size measuring head, bus contacts with the corresponding bus in two holes respectively, now between workpiece and big or small measuring head, produce friction, and pneumatic gauging gap is little, so after workpiece general measure, has cut or scuffing in various degree.And aperture not with the steel connecting rod of copper bush because aperture hardness is higher, generally only have the cut that does not affect rod surface precision, this is that product allows; And the steel connecting rod of aperture band copper bush is because aperture hardness is lower, after general measure, there is the scuffing that affects rod surface precision, this is that product is unallowed; And great majority scuffing is that in use air discharge duct seamed edge burr is caused due to pneumatic gauging, therefore need to improve existing Pneumatic connecting rod measuring instrument.
Generally, in order to meet the precision of pneumatic gauging, need on measuring head, make air discharge duct; Air discharge duct is air discharge duct form outside great majority adopt, and this form smooth gas discharge is easy to processing.As shown in Figure 1, 2, 3, the circumference of measuring head is the face of cylinder 1, and front end end is end face 2, is along the circumferential direction provided with several gaging nozzles 3 on the face of cylinder, shown in figure, on circumferencial direction, has 4 rows, and every row has two gaging nozzles 3.In a side of every row's gaging nozzle 3, be provided with the outer air discharge duct 4 of connection.
Yet, when workpiece enters measuring position, cylinder is along K to promoting slide block, and drive little measuring head to move outward, outside size measuring head, bus contacts with the corresponding bus in two holes respectively, now between workpiece and big or small measuring head, produce friction, air discharge duct seamed edge burr just makes workpiece after measurement, have cut or scuffing in various degree, and especially the steel connecting rod of aperture band copper bush is particularly serious.
Utility model content
The purpose of this utility model is to provide a kind of anti-scratch Pneumatic connecting rod measuring instrument, effectively avoids the scuffing of measuring head to connecting rod aperture.
The technical solution of the utility model is:
Anti-scratch Pneumatic connecting rod measuring instrument, comprise measuring head, measuring head is cylindrical, the circumference of measuring head is the face of cylinder, the front end end of measuring head is end face, on the face of cylinder, be along the circumferential direction provided with many row's gaging nozzles, also comprise vent port and inner vent, vent port is located on end face, the position of vent port is corresponding with single measuring head position on end face, described inner vent is positioned at measuring head, and the outside of described measuring head is provided with annular circular hole, and the two ends of described inner vent are communicated with annular circular hole and vent port respectively.
Single gaging nozzle comprises a plurality of gaging nozzles that set gradually, and between each gaging nozzle of described single gaging nozzle, by inner vent, is communicated with.
The bearing of trend of described inner vent is parallel with the axis of measuring head.
Described vent port be shaped as circle.
Described vent port is special-shaped vent port.
The utility model improves the steel connecting rod measuring head of aperture band copper bush, measuring head changes inner vent form into by original outer air discharge duct, the cooperation of Bing Yu connecting rod manufacturer, by a large amount of line production practices, the steel connecting rod of aperture band copper bush is scratched obviously and improved, optimized connecting rod pneumatic measuring instrument and connecting rod pneumatic gauging technology, test piece produces a desired effect; Through test and checking, the utility model has solved the existing scuffing problem of existing measuring head, produce a desired effect, and suitable extensive popularization.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing measuring head;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is the schematic perspective view of Fig. 1;
Fig. 4 is the structural representation of the utility model embodiment 1;
Fig. 5 is the A-A cut-open view of Fig. 4;
Fig. 6 is the schematic perspective view of Fig. 4;
Fig. 7 is the structural representation of embodiment 2;
Fig. 8 is the schematic perspective view of Fig. 7.
Embodiment
Measuring head of the present utility model is cylindrical, the circumference of measuring head is the face of cylinder 1, and the front end end of measuring head is end face 2, is along the circumferential direction provided with several gaging nozzles 3 on the face of cylinder 1, shown in figure, for there being many rows on circumferencial direction, every row has two gaging nozzles 3.
As shown in Figure 4,5, 6, when connecting rod aperture is larger, adopt two circular row pores better.On the end face 2 of measuring head, be provided with two circular row pores 5.Gaging nozzle 3 hole is around annular circular hole 8, and annular circular hole 8 is communicated with circular row pore 5 by inner vent 6.Between gaging nozzle 3, by inner vent 6, be communicated with.
As shown in Figure 7,8, when connecting rod aperture is less, arrange that gas circuit adopts special-shaped vent port when nervous.On the end face 2 of measuring head, be provided with two special-shaped vent ports 7.Gaging nozzle 3 hole is around annular circular hole 8, and annular circular hole 8 is communicated with special-shaped vent port 7 by inner vent 6.Between gaging nozzle 3, by inner vent 6, be communicated with.The shape of abnormity vent port 7 as shown in Figure 7, is set according to actual conditions such as measuring head thickness, throughputs, for irregularly shaped, but can be also rectangle, square, ellipse etc. shape.
The utility model should calculate extraction flow in detail according to pneumatic gauging design principle and method, in the situation that meeting smooth gas discharge, reduces thin-wall construction as far as possible.The utility model adopts inner vent form.
In actual use, existing outer air discharge duct measuring head is the easy grain raising of air discharge duct seamed edge in use, bad finishing, and institute's test piece almost scratches entirely; And the outer bus contact area cylindrical of inner vent measuring head is more continuous except measuring point external pelivimetry face, the continuous surface that measuring head contacts with workpiece strengthens, the smooth Integrated Chip that is difficult for of measuring head, and in use without air discharge duct seamed edge burr, disturb, good finishing, institute's test piece produces a desired effect, and is worthy to be popularized.The steel connecting rod of aperture band copper bush is scratched obviously and improved.
Claims (5)
1. anti-scratch Pneumatic connecting rod measuring instrument, comprise measuring head, measuring head is cylindrical, the circumference of measuring head is the face of cylinder, the front end end of measuring head is end face, on the face of cylinder, be along the circumferential direction provided with many row's gaging nozzles, it is characterized in that: also comprise vent port and inner vent, vent port is located on end face, the position of vent port is corresponding with single measuring head position on end face, described inner vent is positioned at measuring head, and the outside of described measuring head is provided with annular circular hole, and the two ends of described inner vent are communicated with annular circular hole and vent port respectively.
2. anti-scratch Pneumatic connecting rod measuring instrument according to claim 1, is characterized in that: single gaging nozzle comprises a plurality of gaging nozzles that set gradually, and between each gaging nozzle of described single gaging nozzle, by inner vent, is communicated with.
3. anti-scratch Pneumatic connecting rod measuring instrument according to claim 1 and 2, is characterized in that: the bearing of trend of described inner vent is parallel with the axis of measuring head.
4. anti-scratch Pneumatic connecting rod measuring instrument according to claim 1 and 2, is characterized in that: described vent port be shaped as circle.
5. anti-scratch Pneumatic connecting rod measuring instrument according to claim 1 and 2, is characterized in that: described vent port is special-shaped vent port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596144.9U CN203518960U (en) | 2013-09-26 | 2013-09-26 | Scratch-proof pneumatic connecting rod measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320596144.9U CN203518960U (en) | 2013-09-26 | 2013-09-26 | Scratch-proof pneumatic connecting rod measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203518960U true CN203518960U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320596144.9U Expired - Fee Related CN203518960U (en) | 2013-09-26 | 2013-09-26 | Scratch-proof pneumatic connecting rod measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203518960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225739A (en) * | 2016-08-31 | 2016-12-14 | 洛阳轴研科技股份有限公司 | A kind of Pneumatic measuring head measuring high accuracy hemisphere sphere diameter |
| CN106225740A (en) * | 2016-08-31 | 2016-12-14 | 洛阳轴研科技股份有限公司 | A kind of Pneumatic measuring head measuring high accuracy ball-and-socket sphere diameter |
-
2013
- 2013-09-26 CN CN201320596144.9U patent/CN203518960U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225739A (en) * | 2016-08-31 | 2016-12-14 | 洛阳轴研科技股份有限公司 | A kind of Pneumatic measuring head measuring high accuracy hemisphere sphere diameter |
| CN106225740A (en) * | 2016-08-31 | 2016-12-14 | 洛阳轴研科技股份有限公司 | A kind of Pneumatic measuring head measuring high accuracy ball-and-socket sphere diameter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20140926 |
|
| EXPY | Termination of patent right or utility model |