CN102589382B - Hole position detecting tool for oil pump connecting flange - Google Patents

Hole position detecting tool for oil pump connecting flange Download PDF

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Publication number
CN102589382B
CN102589382B CN201210048309.9A CN201210048309A CN102589382B CN 102589382 B CN102589382 B CN 102589382B CN 201210048309 A CN201210048309 A CN 201210048309A CN 102589382 B CN102589382 B CN 102589382B
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China
Prior art keywords
hole
oil pump
connecting flange
pump connecting
unthreaded
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CN102589382A (en
Inventor
亢彦海
周艳辉
曹玉东
宇文小朋
庄丽华
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Pinghu branch of Great Wall Motor Co., Ltd
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Great Wall Motor Co Ltd
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Abstract

The invention relates to a detecting tool, and particularly relates to a hole position detecting tool for an oil pump connecting flange. The hole position detecting tool comprises a base (7) of a screw thread bottom hole detecting hole (5) and an unthreaded hole detecting hole (6), a screw thread bottom hole detecting pin (8), and an unthreaded hole detecting pin (9), and a positioning hole (10) disposed on the base (7), the hole position detecting tool also comprises a central positioning shaft (14) provided with a reference part (12) and a positioning part (13), when the reference part (12) goes through the central hole (2) of the oil pump connecting flange (1) on a bearing plane (11) and is tightly inserted in a positioning hole (10), the positioning part (13) is inserted in the central hole (2) so that the central line of the central hole (2) of the oil pump connecting flange (1) coincides with the central line of the unthreaded hole detecting hole (6) in a circumferential distribution. Via the above scheme, position detection of the unthreaded hole and screw thread hole of the oil pump connecting flange is realized, and detection result is accurate.

Description

Hole position detecting tool for oil pump connecting flange
Technical field
The present invention relates to a kind of cubing, specifically relate to the hole position detecting tool for oil pump connecting flange that qualified detection is carried out in a kind of position, oil pump connecting flange hole that automotive oil tank is connected with oil pump.
Background technology
Existing, motor car engine is carried out to oil pump and the fuel tank of fuel feeding, conventionally adopt oil pump connecting flange to connect, reliable for what guarantee to connect, the manufacturing accuracy of oil pump connecting flange is had to very high requirement.In the structure of oil pump connecting flange, on its end face, there is the center pit of a perforation, the central axis of this center pit of take has a plurality of threaded holes and unthreaded hole as distribution center's circle distribution, the position of these threaded holes and unthreaded hole, conventionally using an end face of center pit and flange as design basis, it has very high position accuracy demand, in manufacture process, must detect.
In testing process as above, to the detection in screw hole, can directly to the thread Pilot hole before tapping, detect, conventional detection means is the setting test pin corresponding with thread Pilot hole and unthreaded hole position at present, if test pin can, all through corresponding thread Pilot hole and unthreaded hole, think that each position, hole on this oil pump connecting flange is all qualified.As Chinese invention patent CN201488680U discloses the device of a kind of measuring position degree, by measurement column, tapered sleeve, chassis, Screw, gland, large screw, reference column, handle forms, reference column is by gland and play screw and be arranged on chassis, measurement column is arranged on chassis by tapered sleeve and Screw, the internal diameter of tapered sleeve is taper, the external diameter of measurement column is taper, be convenient to like this change measurement column, handle is arranged on domain, this structure can meet the needs that Factory detects wheel position degree, can use the detection of the bolt hole position degree of multiple diameter of bolt hole and center-hole diameter.Yet, it is detection reference that this method does not adopt center pit, although between each position, hole recording, mutual alignment is qualified, the distribution center in these holes and the central axes of center pit can not be described, thereby can not realize the detection to position, oil pump connecting flange hole.Meanwhile, this center pit adopts stamping forming method to make, and sidewall roughness is poor, also may have tear-strap and euphotic belt, with conventional testing tool, cannot using its central axis directly as detection reference.Meanwhile, use the equipment of the costlinesses such as three-coordinates measuring machine detect and expend time in very much, be unfavorable for online detection.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of hole position detecting tool for oil pump connecting flange that the position, hole of the threaded hole on oil pump connecting flange and unthreaded hole is detected of realizing, its testing result is accurate, simple in structure.
For achieving the above object, hole position detecting tool for oil pump connecting flange of the present invention, thread Pilot hole and unthreaded hole along oil pump connecting flange center pit circle distribution are detected, comprise and there is the base that the thread Pilot hole corresponding with thread Pilot hole and unthreaded hole position detects hole and unthreaded hole detection hole, slide and insert the thread Pilot hole test pin in thread Pilot hole and thread Pilot hole detection hole, and slide and insert the unthreaded hole test pin in unthreaded hole and unthreaded hole detection hole, on base, be provided with pilot hole, the base upper surface that thread Pilot hole detects hole and unthreaded hole detection position, hole is a load plane; Also comprise that one has the centralized positioning axle of benchmark portion and location division, in benchmark portion, run through the oil pump connecting flange center pit being placed on load plane and while being closely inserted in pilot hole, described location division support is inserted in center pit and makes the center line of oil pump connecting flange center pit detect all center of distribution lines of hole circle with unthreaded hole to overlap.By benchmark portion, coordinate with the plug-in mounting of pilot hole, and then realize location division and impel oil pump connecting flange center line and all center of distribution lines of unthreaded hole detection hole circle to overlap, realized when position, oil pump connecting flange hole is detected, using the center line of oil pump connecting flange center pit as a detection reference, be aided with load plane carries one of them end face of oil pump connecting flange simultaneously, make load plane as another detection reference in testing process, these two benchmark are all identical with the design basis of each connecting hole of oil pump connecting flange, therefore, detection under these two origin reference locations and to each hole of oil pump connecting flange, its testing result is comparatively accurate, and simple in structure.
As the restriction to aforesaid way, the center line of described pilot hole detects all center of distribution lines of hole circle with unthreaded hole and overlaps.Pilot hole is arranged on the center of base, and then makes benchmark portion and location division center line setting altogether, makes the manufacture of centralized positioning axle simple.
As the improvement to aforesaid way, location division is round platform, is less than the aperture of center pit near the round platform bottom surface diameter of benchmark portion, and another bottom surface diameter of this round platform is greater than the aperture of center pit.The gabarit conical surface by round platform positions oil pump connecting flange, has improved positioning precision when oil pump connecting flange is detected, and has further improved the accuracy of testing result.
As the improvement to technical solution of the present invention, in thread Pilot hole detects hole and unthreaded hole detect the lining that is embedded with respectively coaxial setting in hole.Adopt after lining, can be in the over worn situation of lining rebush more, the life-span of having improved cubing.
In addition,, for ease of the operation to center locating shaft, on centralized positioning axle, be provided with handle.
In sum, adopt as above technical scheme, realized the unthreaded hole to oil pump connecting flange, the position degree detection of threaded hole, its testing result is accurate, and simple in structure, easy to operate.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the present invention is done further to describe in detail:
Fig. 1 is the front view of oil pump connecting flange;
Fig. 2 is the perspective view of the embodiment of the present invention;
Fig. 3 is Fig. 2 vertical direction cut-open view;
Fig. 4 is that Fig. 3 is at the structural representation under oil pump connecting flange detected state.
In figure:
1, oil pump connecting flange; 2, center pit; 3, thread Pilot hole; 4, unthreaded hole; 5, thread Pilot hole detects hole; 6, unthreaded hole detects hole; 7, base; 8, thread Pilot hole test pin; 9, unthreaded hole test pin; 10, pilot hole; 11, load plane; 12, benchmark portion; 13, location division; 14, centralized positioning axle; 15, lining; 16, handle; 17, taper portion.
Embodiment
Hole position detecting tool for oil pump connecting flange as shown in Figure 2 to Figure 3, for the detection of the oil pump connecting flange 1 to shown in Fig. 1.As shown in Figure 1, the center pit 2 of the center of oil pump connecting flange 1 for connecting, on end face, be provided with along eight threaded holes and two unthreaded holes 4 of the central axis circle distribution of this center pit 2, the detection in double thread hole, the position, hole that can be converted into the thread Pilot hole 3 before direct double thread tapping is detected.
As shown in Figure 2 and Figure 3, it is circular base 7 that the hole position detecting tool for oil pump connecting flange of the present embodiment includes an end surface shape, has a pilot hole 10 that is positioned at center on base 7, like this, 10 of base 7 and pilot holes form on the whole one circular.The upper surface of base 7 is a planar structure, and for ease of the present invention being done to explanation more clearly, we are called load plane 11 by this planar structure.Using on the center line of pilot hole 10 base 7 as circle distribution center line, circle distribution is distributed with and detects hole 5 with thread Pilot hole 3 and unthreaded hole 4 relative set and the thread Pilot hole that connects base 7 and unthreaded hole detects hole 6, and at thread Pilot hole, detects hole 5 and unthreaded hole and detect interior the embedding respectively in hole 6 and have the lining 15 arranging along its axis coaxle.
In addition, in the present invention, be also provided with thread Pilot hole test pin 8 and unthreaded hole test pin 9, this thread Pilot hole test pin 8 can slide and insert in thread Pilot hole 3 and thread Pilot hole detection hole 5, when thread Pilot hole being detected to lining 15 in hole 5 and thread Pilot hole 3 and is set to aperture and equates, the diameter that thread Pilot hole test pin 8 inserts in above-mentioned two holes equates with the aperture in above-mentioned two holes substantially, finally to guarantee thread Pilot hole test pin 8 gapless perforation thread Pilot hole 3 and in insertion lining 15 smoothly; In like manner, unthreaded hole test pin 9, unthreaded hole 6 and the lining 15 being placed in unthreaded hole detection hole 6 can adopt similar setting, only unthreaded hole test pin 9 has a taper portion 17, this taper portion 17 is the invert form shown in Fig. 3, its bottom surface diameter is less than the aperture of unthreaded hole 6, and upper bottom surface diameter is greater than the aperture of unthreaded hole 6, the setting of this structure, can make this taper portion 17 and unthreaded hole 6 peg graft while coordinating, the center line of unthreaded hole test pin 9 and the center line of unthreaded hole 6 can be overlapped to greatest extent, and then improve accuracy of detection.
In structural design of the present invention, also comprise that one has the centralized positioning axle 14 of benchmark portion 12 and location division 13, as shown in Figure 3, benchmark portion 12 and location division 13 center line settings altogether, and benchmark portion 12 is a cylindrical structure, the aperture of this cylindrical diameter and pilot hole 10 is corresponding, and be less than the aperture of oil pump connecting flange 1 center pit 2, such setting, can make benchmark portion 12 can unresisted perforation center pit 2 after, realize tight plug-in mounting with pilot hole 10.
The gabarit of location division 13 is as shown in Figure 3 round table-like, and its bottom surface and benchmark portion 12 are rigidly connected, and bottom surface diameter is less than the aperture of center pit 2, and its end face diameter is greater than the aperture of center pit 2.Such structural design, make location division 13 in inserting center pit 2 and when its outside surface and center pit 2 are closely cooperated, having realized location division 13 supports is inserted in center pit 2, this state can make the center line of location division 13 overlap to greatest extent with the center line of center pit 2, and then improves accuracy of detection.
By above description, can find out, by benchmark portion 12, coordinate with the plug-in mounting of pilot hole 10, when realizing between centralized positioning axle 14 and base 7 location, position, the center line of having guaranteed location division 13 overlaps with the center line of pilot hole 10, and the center line of pilot hole 10 is distribution center's lines that unthreaded hole detection hole 6 and thread Pilot hole detect hole 5 circle distribution on base 7, make like this location division 13 support be inserted in center pit 10 when interior, the center line of oil pump connecting flange 1 center pit 2 overlaps with the center line of pilot hole 10.
Based on foregoing description, at this, it is to be noted, because benchmark portion 12 matches with pilot hole 10, and the object that between the two, closely plug-in mounting coordinates to be the center line of realizing location division 13 detect hole 6 and thread Pilot hole detection hole 5 distribution center's line of circle distribution on base 7 with unthreaded hole overlaps, therefore, position except the pilot hole 10 described in the present embodiment, pilot hole 10 can also not be arranged on the center of base 7, also be not limited to a hole, accordingly, benchmark portion 12 also will carry out Adaptive change with position, the quantity of pilot hole 10.
In addition, the operation for ease of operating personnel to center locating shaft 14,13 the top in location division, is fixed with a handle 16 by bolt 18.
In use, as shown in Figure 4, oil pump connecting flange 1 is positioned on the load plane 11 of base 7, and make unthreaded hole 4 on oil pump connecting flange 1 and unthreaded hole detect hole 6, thread Pilot hole 3 is roughly corresponding with thread Pilot hole detection hole 5.Operator is by handle 16, centralized positioning axle 14 is mentioned, then make the benchmark portion 12 of centralized positioning axle 14 connect after the center pit 2 of oil pump connecting flange 1, be inserted in pilot hole 10, in this plug-in mounting process, due to the effect of location division 13,13 pairs of location divisions oil pump connecting flange 1 carries out horizontal position adjustment, until location division 13 support is inserted in center pit 2 when interior, complete the position location of oil pump connecting flange 1 on base 7.In two unthreaded holes 4, insert respectively unthreaded hole test pin 9 from top to bottom, if the taper portion 17 of unthreaded hole test pin 9 can be inserted in unthreaded hole 4 smoothly, so again thread Pilot hole test pin 8 is carried out to plug-in mounting, if thread Pilot hole test pin 8 has also all been inserted into thread Pilot hole 3 smoothly and thread Pilot hole detects in hole 5, illustrate that so oil pump connecting flange 1 is qualified; If there is the phenomenon that any one test pin can not insert, prove that this oil pump connecting flange 1 is defective.Carry handle 16, after centralized positioning axle 14 is taken off, take detected oil pump connecting flange 1 away, then on base 7, place next part oil pump connecting flange 1 and detect.

Claims (4)

1. a hole position detecting tool for oil pump connecting flange, thread Pilot hole (3) along oil pump connecting flange (1) center pit (2) circle distribution and unthreaded hole (4) are detected, comprise base (7), base (7) is provided with the thread Pilot hole corresponding with thread Pilot hole (3) position and detects hole (5), and the unthreaded hole corresponding with unthreaded hole (4) position detects hole (6), slide and insert the thread Pilot hole test pin (8) in thread Pilot hole (3) and thread Pilot hole detection hole (5), and slide and insert the unthreaded hole test pin (9) in unthreaded hole (4) and unthreaded hole detection hole (6), on base (7), be provided with pilot hole (10), it is characterized in that: base (7) upper surface that thread Pilot hole detects hole (5) and unthreaded hole detection position, hole (6) is a load plane (11), also comprise that one has the centralized positioning axle (14) of benchmark portion (12) and location division (13), in benchmark portion (12), run through oil pump connecting flange (1) center pit (2) being placed on load plane (11) and while being closely inserted in pilot hole (10), described location division (13) support is inserted in center pit (2) and the center line of oil pump connecting flange (1) center pit (2) is overlapped with the center line of unthreaded hole detection hole (6) circle distribution, described location division (13) is round platform, is less than the aperture of center pit (2) near the round platform bottom surface diameter of benchmark portion (12), and another bottom surface diameter of this round platform is greater than the aperture of center pit (2), described unthreaded hole test pin (9) has an inverted taper portion.
2. according to the hole position detecting tool for oil pump connecting flange described in claim 1, it is characterized in that: the center line of described pilot hole (10) overlaps with the center line that unthreaded hole detects hole (6) circle distribution.
3. according to the hole position detecting tool for oil pump connecting flange described in claim 1 or 2, it is characterized in that: in thread Pilot hole detects hole (5) and the lining (15) that is embedded with respectively coaxial setting in unthreaded hole detection hole (6).
4. according to the hole position detecting tool for oil pump connecting flange described in claim 1 or 2, it is characterized in that: on centralized positioning axle (14), be provided with handle (16).
CN201210048309.9A 2012-02-29 2012-02-29 Hole position detecting tool for oil pump connecting flange Active CN102589382B (en)

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Application Number Priority Date Filing Date Title
CN201210048309.9A CN102589382B (en) 2012-02-29 2012-02-29 Hole position detecting tool for oil pump connecting flange

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Application Number Priority Date Filing Date Title
CN201210048309.9A CN102589382B (en) 2012-02-29 2012-02-29 Hole position detecting tool for oil pump connecting flange

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CN102589382B true CN102589382B (en) 2014-12-03

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CN102889835A (en) * 2012-09-24 2013-01-23 周佼 Device for detecting positions of uniformly distributed round holes on same circumference
CN102927878B (en) * 2012-11-08 2015-11-18 南车戚墅堰机车有限公司 Axle suspension bearing box hole measuring device and using method thereof
CN102997787A (en) * 2012-11-16 2013-03-27 无锡麦铁精密机械制造有限公司 Hole position gauge for brake discs
CN102967215A (en) * 2012-11-18 2013-03-13 无锡麦铁精密机械制造有限公司 Hole site checking tool
CN103256915B (en) * 2012-12-20 2016-01-20 湖南吉利汽车部件有限公司 Automobile radiator detection mechanism
CN103148782B (en) * 2013-03-07 2015-04-15 鹰普机械(宜兴)有限公司 Comprehensive inspection tool for simulating component assembly position relation structure
CN103344162A (en) * 2013-07-26 2013-10-09 张家口动力机械有限公司 Measuring tool for measuring positions of threaded holes and key slots
CN103673814A (en) * 2013-12-05 2014-03-26 重庆顺多利机车有限责任公司 Die-casting fitting hole detection tool
CN105737712B (en) * 2016-04-28 2018-06-08 张家港中环海陆特锻股份有限公司 For detecting the detection instrument that flange spiro keyhole position puts error
CN105783665A (en) * 2016-04-28 2016-07-20 张家港中环海陆特锻股份有限公司 Chord distance gauge for testing circumferential position error of flange bolt hole
CN105865299B (en) * 2016-06-17 2019-01-25 常州华德机械有限公司 Self-centering flange hole position check tool
CN106895762A (en) * 2017-03-24 2017-06-27 浙江太阳股份有限公司 A kind of cubing of quick measurement crankshaft flange stomidium system position degree
CN109141311B (en) * 2018-10-31 2020-07-21 浙江中超新材料股份有限公司 Hole position degree secondary flywheel comprehensive detection tool with auxiliary detection block
CN110230966B (en) * 2019-06-06 2024-05-14 中信戴卡股份有限公司 Position gauge
CN112710206A (en) * 2019-10-25 2021-04-27 上海宝钢高强钢加工配送有限公司 Portable hole site on-line measuring device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201318924Y (en) * 2008-12-15 2009-09-30 重庆长安汽车股份有限公司 Engine crank shaft end surface hole-series position checking tool capable of eliminating non-circularity positioning
CN201488680U (en) * 2009-06-19 2010-05-26 中信戴卡轮毂制造股份有限公司 Device for measuring displacement
CN201772836U (en) * 2010-07-26 2011-03-23 东风(十堰)有色铸件有限公司 Measuring instrument for measuring position degree of holes with pattern draft
CN201897450U (en) * 2010-11-25 2011-07-13 苏州春兴精工股份有限公司 Multi-hole-site detecting device for disc casting
CN202057261U (en) * 2010-12-22 2011-11-30 中钢集团邢台机械轧辊有限公司 Flange end face hole detection apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101556132A (en) * 2008-04-10 2009-10-14 深圳富泰宏精密工业有限公司 Detection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201318924Y (en) * 2008-12-15 2009-09-30 重庆长安汽车股份有限公司 Engine crank shaft end surface hole-series position checking tool capable of eliminating non-circularity positioning
CN201488680U (en) * 2009-06-19 2010-05-26 中信戴卡轮毂制造股份有限公司 Device for measuring displacement
CN201772836U (en) * 2010-07-26 2011-03-23 东风(十堰)有色铸件有限公司 Measuring instrument for measuring position degree of holes with pattern draft
CN201897450U (en) * 2010-11-25 2011-07-13 苏州春兴精工股份有限公司 Multi-hole-site detecting device for disc casting
CN202057261U (en) * 2010-12-22 2011-11-30 中钢集团邢台机械轧辊有限公司 Flange end face hole detection apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
《一种新型孔位置度综合量规》;崔丽娟;《砖瓦》;20070831;第68-70页 *
崔丽娟.《一种新型孔位置度综合量规》.《砖瓦》.2007, *

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Effective date of registration: 20191225

Address after: 314200 north side of Rongrong Road, east side of Pingshan Avenue, Pinghu Economic and Technological Development Zone, Jiaxing City, Zhejiang Province

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Address before: 071000 No. 2266 Chaoyang South Street, Hebei, Baoding

Patentee before: Changcheng Automobile Co., Ltd.

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