CN202229744U - Engine cylinder body or cylinder cover screwed hole displacement detection pin - Google Patents
Engine cylinder body or cylinder cover screwed hole displacement detection pin Download PDFInfo
- Publication number
- CN202229744U CN202229744U CN2011203003658U CN201120300365U CN202229744U CN 202229744 U CN202229744 U CN 202229744U CN 2011203003658 U CN2011203003658 U CN 2011203003658U CN 201120300365 U CN201120300365 U CN 201120300365U CN 202229744 U CN202229744 U CN 202229744U
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- China
- Prior art keywords
- engine cylinder
- taper thread
- screwed hole
- pin
- displacement detection
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- Expired - Fee Related
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- 238000001514 detection method Methods 0.000 title abstract description 9
- 238000006073 displacement reaction Methods 0.000 title abstract 4
- 238000012360 testing method Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 description 11
- 238000012545 processing Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model relates to an engine cylinder body or cylinder cover screwed hole displacement detection pin, comprising a cylindric pin body, wherein one end of the pin body is provided with a hand-operated fastening head, the end portion of the hand-operated fastening head is provided with a linear fastening groove, the other end of the pin body is provided with a taper thread column, the outer end of the taper thread column is a small end, the inner end of the taper thread column is a big end, the middle portion of the pin body is a cylindric measuring portion, and between the measuring portion and the big end of the taper thread column there is provided an overrun annular groove. The engine cylinder body or cylinder cover screwed hole displacement detection pin enables the measuring error of measuring data to be less than 0.04 mm and to be greatly less than the measuring error (generally about 0.1 mm) of the traditional measuring method, thereby resolving the engine cylinder body or cylinder cover screwed hole displacement detection problem; and the detection pin is simple in structure and convenient in operation.
Description
Technical field
The utility model relates to a kind of engine cylinder-body cylinder cap screw position degree test pin.
Background technology
Engine cylinder-body or cylinder cap screw thread hole location are important indicators of engine; It not only can have influence on the assembling of engine; And can influence the complete machine performance of engine; Yet engine cylinder-body cylinder cap screw thread hole location work in-process is again (particularly in debugging and the trial production stage) that is difficult to guarantee, its main cause is that the measurement of double thread hole location exists very big detection error.
The method that is used to measure engine cylinder-body cylinder cap screw thread hole location at present has following several kinds: 1. screw thread hole position comprehensive check tool; 2. directly use the three-dimensional coordinates measurement threaded hole; 3. with three-dimensional coordinates measurement threaded hole bottom outlet.Cost is high during with method 1, can not quantize to detect by the double thread hole location simultaneously, and compensation that also just can not the processing of double thread hole provides effective foundation, is impossible employing the method in debugging and tentative stage.For method 2, because threaded hole is uneven, the probe of three-dimensional possibly got to the high point of threaded hole, also possibly get to the low spot of threaded hole, and very big measuring error (error may reach 0.1mm usually, even bigger) is so just arranged.For method 3, because bottom outlet and threaded hole are to be processed by different cutters, threaded hole is adding the surface of having destroyed original bottom outlet man-hour simultaneously, reflects that with the position of bottom outlet also can there be very big error in the position of threaded hole, scheme that neither be desirable.
Summary of the invention
In order to solve the problems of measurement of engine cylinder-body or cylinder cap screw thread hole location; Just must reduce measuring error; The present invention provides a kind of engine cylinder-body or cylinder cap screw thread hole location to detect and uses test pin; It both can simulate the time of day that screw thread detects, and the detection error of threaded hole when detecting dwindled greatly.
Concrete design proposal is following:
A kind of engine cylinder-body or cylinder cap screw thread hole location detect and comprise columned shank with test pin, and an end of said shank is manual tappet head, and manually the end of tappet head is provided with a word and tightens groove; The other end is the taper thread post, and the outer end of taper thread post is a small end, and the inner is big end; The middle part is columned measuring point, is provided with the surpassed distance annular groove between the big end of measuring point and taper thread post.
The length of said taper thread post is 15～40 ㎜, and tapering is 0.5～1 degree, and its small end is 0.02 ㎜ with the right alignment of big end.
The length of said columned measuring point is 25～55 ㎜, and surfaceness is Ra1.6 μ m, and cylindricity is 0.02 ㎜.
Because STRTHD pin and screwing of STRTHD are certain to exist the gap, if gappedly will have the measurement result distortion, so when measurement screw thread hole location, must eliminate the gap; Just adopted taper thread here, the taper thread of test pin and tested threaded hole adopt interference fit, and the diameter of taper thread small end 6 is little than standard thread; Make things convenient for the screw-in of screw thread test pin; The diameter of the big end 5 of taper thread is big than standard thread, reaching the purpose of interference fit, thereby eliminates the gap.The tapering of taper thread is bigger than normal, and the test pin screw-in depth is not enough, can rock, if tapering is less than normal, test pin directly is screwed into the end, can not eliminate the gap of threaded engagement fully.
Through facts have proved; The measuring error of utilizing the measured data of the utility model is all in 0.04mm; Comparing reduces greatly with the measuring error (usually about 0.1mm) of conventional measurement, has solved engine cylinder-body or this difficult problem of cylinder cap threaded hole position measurement.This test pin is simple in structure, and is easy to operate.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done explanation further through embodiment.
Embodiment:
Referring to Fig. 1, a kind of engine cylinder-body or cylinder cap screw thread hole location detect and comprise columned shank with test pin, and an end of shank is manual tappet head 2, and manually the end of tappet head 2 offers a word and tightens groove 1; The other end is the taper thread post, and the outer end of taper thread post is a small end 6, and the inner is big end 5; The length of taper thread post is 20 ㎜, and tapering is 0.6 degree, and its small end is 0.02 ㎜ with the right alignment of big end.The middle part is columned measuring point 3, offers surpassed distance annular groove 4 between the big end 5 of measuring point 3 and taper thread post, and the length of measuring point is 30 ㎜, and surfaceness is Ra1.6 μ m, and cylindricity is 0.02 ㎜.
In the technique scheme, a word is tightened groove 1 and is used for straight screwdriver tightening test pin.Manual tappet head 2 is the handled easily, and the person directly screws in test pin in the workpiece to be detected (engine cylinder-body or cylinder cap) with hand.Measuring point 3 is the three-dimensional coordinates measurements that are used for the screw thread hole location, and the precision of measuring point is high more, and the measuring error that is reflected relatively will be more little.The surpassed distance annular groove is a process requirements, the processing of convenient cone shape double-screw bolt.
When being used for the detection of engine cylinder-body or cylinder cap screw thread hole location; The artificial tested threaded hole that this test pin is screwed in engine cylinder-body or cylinder cap; Screw-in depth test pin taper thread length 1/3-3/4 between; Measure detection (with the measuring point of probe measurement test pin) with three-dimensional according to technology, measurement screws out tested threaded hole with test pin after finishing, and the testing result data is analyzed again.
Claims (3)
1. engine cylinder-body or cylinder cap screw thread hole location detect and use test pin, and it is characterized in that: comprise columned shank, an end of said shank is manual tappet head, and the end of manual tappet head is provided with a word and tightens groove; The other end is the taper thread post, and the outer end of taper thread post is a small end, and the inner is big end; The middle part is columned measuring point, is provided with the surpassed distance annular groove between the big end of measuring point and taper thread post.
2. a kind of engine cylinder-body according to claim 1 or cylinder cap screw thread hole location detect and use test pin, and it is characterized in that: the length of said taper thread post is 15～40 ㎜, and tapering is 0.5～1 degree, and its small end is 0.02 ㎜ with the right alignment of big end.
3. a kind of engine cylinder-body according to claim 1 or cylinder cap screw thread hole location detect and use test pin, and it is characterized in that: the length of said columned measuring point is 25～55 ㎜, and surfaceness is Ra1.6 μ m, and cylindricity is 0.02 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203003658U CN202229744U (en) | 2011-08-18 | 2011-08-18 | Engine cylinder body or cylinder cover screwed hole displacement detection pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203003658U CN202229744U (en) | 2011-08-18 | 2011-08-18 | Engine cylinder body or cylinder cover screwed hole displacement detection pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202229744U true CN202229744U (en) | 2012-05-23 |
Family
ID=46080329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203003658U Expired - Fee Related CN202229744U (en) | 2011-08-18 | 2011-08-18 | Engine cylinder body or cylinder cover screwed hole displacement detection pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202229744U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101559A (en) * | 2017-06-30 | 2017-08-29 | 中国航空工业标准件制造有限责任公司 | Position degree detects instrument |
| CN112815805A (en) * | 2021-01-19 | 2021-05-18 | 重庆新驰越动力设备有限公司 | Thread axis gauge and thread part machining process thereof |
-
2011
- 2011-08-18 CN CN2011203003658U patent/CN202229744U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101559A (en) * | 2017-06-30 | 2017-08-29 | 中国航空工业标准件制造有限责任公司 | Position degree detects instrument |
| CN112815805A (en) * | 2021-01-19 | 2021-05-18 | 重庆新驰越动力设备有限公司 | Thread axis gauge and thread part machining process thereof |
| CN112815805B (en) * | 2021-01-19 | 2025-02-07 | 重庆新驰越动力设备有限公司 | A thread axis gauge and thread part processing technology thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The East Road in Baohe District of Hefei city of Anhui Province, No. 176 230022 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: The East Road in Baohe District of Hefei city of Anhui Province, No. 176 230022 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20200818 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |