CN103994703A - Measurement tool for top dead center of diesel engine - Google Patents
Measurement tool for top dead center of diesel engine Download PDFInfo
- Publication number
- CN103994703A CN103994703A CN201410251934.2A CN201410251934A CN103994703A CN 103994703 A CN103994703 A CN 103994703A CN 201410251934 A CN201410251934 A CN 201410251934A CN 103994703 A CN103994703 A CN 103994703A
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- China
- Prior art keywords
- top dead
- locating piece
- dead centre
- diesel engine
- bent axle
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Abstract
The invention discloses a measurement tool for a top dead center of a diesel engine. The measurement tool comprises a support and a positioning piece. The support comprises a crank small-head positioning portion and a top dead center pointer measurement portion. A cylinder positioning hole penetrating through the upper surface and the lower surface is formed in the middle of the crank small-head positioning portion. The cylinder positioning hole is in clearance fit with the outer circle of a crank small head so that the support can be positioned. A long-key groove axially extending is formed in the inner circumference face of the cylinder positioning hole; the top dead center pointer measurement portion extends vertically upwards from the outer side face of the crank small-head positioning portion along the long-key groove, and a top dead center pointer measurement groove with a certain width is formed in the top of the top dead center pointer measurement portion. The positioning piece comprises a hollow positioning block assembly or a solid positioning block, one side of the hollow positioning block assembly or one side of the solid positioning block is matched with the long-key groove and the other side of the hollow positioning block assembly or the other side of the solid positioning block is matched with a key groove of the crank small head so that the support can be positioned. Whether a piston of the diesel engine is located at the top dead center position or not can be accurately detected by the measurement tool, and therefore the assembly quality of a part of components is guaranteed.
Description
Technical field
The present invention relates to diesel engine field, particularly a kind of survey instrument of diesel engine top dead centre.
Background technology
The part of diesel engine requires piston in top dead center position while assembling, and in traditional assembly technology, this part is before cylinder cap assembling, installs by the top dead center position of range estimation piston.
In existing assembly technology, the assembling of this part is after cylinder cap assembling, now can not observe directly the particular location of piston, the top dead centre pointer of keyway that can only be by observing bent axle microcephaly with eye in outside above whether with it aligns, it is screw thread that this top dead centre pointer leans on one of gear chamber, be threaded in gear chamber by this, the top dead centre pointer position in described gear chamber is by the determining positions of gear chamber upper screwed hole.When the top dead centre pointer of bent axle microcephaly's keyway and its top is to timing, illustrate that the piston of diesel engine is in top dead center position.
Whether the keyway of directly observing bent axle microcephaly with eye there is larger error with the top dead centre pointer of its top to timing, by analysis, when the top dead centre pointer of bent axle microcephaly's keyway and its top is not to timing, can make piston top dead center inaccurate and affect the assembly quality of this part, and then occur that engine oil consumption increases, produces blowby and fuel consume increase, has a strong impact on engine performance.
The information that is disclosed in this background technology part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Summary of the invention
The object of the present invention is to provide a kind of survey instrument of simple and reasonable diesel engine top dead centre, the survey instrument of this diesel engine top dead centre is in the situation that being equipped with cylinder cap, whether can accurately detect the piston of diesel engine in top dead center position, and then guarantee the assembly quality of part, avoid occurring that engine oil consumption increases, produces blowby and fuel consume increase, and have a strong impact on engine performance.
For achieving the above object, the invention provides the survey instrument of diesel engine top dead centre, comprise: support, comprise: bent axle microcephaly location division and top dead centre pointer measurement section, the middle part of described bent axle microcephaly location division offers the cylinder pilot hole that runs through upper and lower surface, this cylinder pilot hole and bent axle microcephaly's cylindrical clearance fit is with locating support, and the inner peripheral surface of described cylinder pilot hole offers axially extended long keyway; Described top dead centre pointer measurement section is extended along the direction straight up of long keyway by bent axle microcephaly location division lateral surface, and its top offers the top dead centre pointer measuring flume with certain width; And keeper, comprising: hollow locating piece assembly or solid locating piece, a side of described hollow locating piece assembly or solid locating piece coordinates with long keyway, and opposite side coordinates with bent axle microcephaly's keyway and support is located.
Preferably, in technique scheme, bent axle microcephaly location division is the square tabular of four limit chamferings.
Preferably, in technique scheme, the bottom surface, outer end of long keyway offers the threaded hole extending straight up, hollow locating piece assembly comprises again: hollow locating piece and housing screw, hollow locating piece is cube structure, offer the ladder counterbore passing for housing screw, by housing screw, hollow locating piece is fixed in the long keyway of support.
Preferably, in technique scheme, the inner peripheral surface of the just right cylinder pilot hole of threaded hole offers the opening of stepping down.
Preferably, in technique scheme, a side of hollow locating piece and long keyway clearance fit.
Preferably, in technique scheme, solid locating piece is cube structure, one side and long keyway interference fit.
Compared with prior art, the present invention has following beneficial effect: the survey instrument of this diesel engine top dead centre is in the situation that being equipped with cylinder cap, whether can accurately detect the piston of diesel engine in top dead center position, and then guarantee the assembly quality of part, avoid occurring that engine oil consumption increases, produces blowby and fuel consume increase, and have a strong impact on engine performance.
Brief description of the drawings
Fig. 1 is the use state perspective view of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 2 is the main TV structure schematic diagram of use state of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 3 is the sectional structure schematic diagram of the A-A direction of Fig. 2.
Fig. 4 is the support perspective view of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 5 is the main TV structure schematic diagram of support of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 6 is the sectional structure schematic diagram of the B-B direction of Fig. 5.
Fig. 7 is the support plan structure schematic diagram of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 8 is the hollow locating piece plan structure schematic diagram of the survey instrument of diesel engine top dead centre of the present invention.
Fig. 9 is the sectional structure schematic diagram of the C-C direction of Fig. 8.
Figure 10 is the solid locating piece plan structure schematic diagram of the survey instrument of diesel engine top dead centre of the present invention.
Description of reference numerals:
1-support, 11-bent axle microcephaly location division, 12-top dead centre pointer measurement section, 13-long keyway, 14-threaded hole, the 15-opening of stepping down, 16-top dead centre pointer measuring flume, the hollow locating piece of 21-, 22-housing screw, the solid locating piece of 23-, 3-gear chamber, 4-top dead centre pointer, 5-bent axle.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole instructions and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or ingredient, and do not get rid of other element or other ingredient.
As shown in Figures 1 to 7, comprise according to the concrete structure of the survey instrument of the diesel engine top dead centre of the specific embodiment of the invention: support 1 and for locate the keeper of this support 1 by bent axle microcephaly's keyway, wherein, the adaptive location of the bottom of support 1 and bent axle microcephaly, its top has elongated top dead centre pointer measuring flume, in the time of the bottom of support 1 and the adaptive location of bent axle microcephaly, be threaded in gear chamber by this, if and the top dead centre pointer that is positioned at bent axle microcephaly's keyway top drops on the width range of elongated top dead centre pointer measuring flume, illustrate that diesel engine piston is at top dead center position.Whether the survey instrument of this diesel engine top dead centre, in the situation that cylinder cap being housed, can accurately detect the piston of diesel engine in top dead center position, and then guarantees the assembly quality of part.
Wherein, support 1 comprises: bent axle microcephaly location division 11 and the top dead centre pointer measurement section 12 at top formation top dead centre pointer measuring flume, bent axle microcephaly location division is the square tabular of four limit chamferings, its middle part offers the cylinder pilot hole that runs through upper and lower surface, this cylinder pilot hole and bent axle microcephaly's cylindrical clearance fit is with locating support 1, and convenient and hand-held detection operates.In addition, the inner peripheral surface of this cylinder pilot hole offers axially extended long keyway 13, for positioning by keeper and bent axle microcephaly's keyway.The bottom surface, outer end of this long keyway 13 offers straight up the threaded hole 14 extending, and the inner peripheral surface of the just right cylinder pilot hole of this threaded hole offers the opening 15 of stepping down, for conveniently screwing the screw being spirally connected with this threaded hole.
Top dead centre pointer measurement section 12 is extended along the direction straight up of long keyway by bent axle microcephaly location division lateral surface, its top offers the top dead centre pointer measuring flume 16 with certain width, when the bent axle microcephaly location division 11 of support 1 bottom is during with the adaptive location of bent axle microcephaly, if be positioned at the top dead centre pointer of bent axle microcephaly's keyway top and drop on the width range of elongated top dead centre pointer measuring flume 16, illustrate that diesel engine piston is at top dead center position.
As shown in Figures 8 to 10, keeper comprises: hollow locating piece assembly or solid locating piece 23, wherein, hollow locating piece assembly comprises again: hollow locating piece 21 and housing screw 22, hollow locating piece 21 is cube structure, offer the ladder counterbore passing for housing screw 22, by housing screw 22, through this ladder counterbore, (head of housing screw 22 sinks to the macropore of this ladder counterbore, avoid interfering while cooperation with bent axle microcephaly's keyway) hollow locating piece 21 is fixed in the long keyway 13 of support 1 (side of hollow locating piece 21 and long keyway 13 clearance fit), in the time that support 1 passes through cylinder pilot hole and bent axle microcephaly clearance fit, the opposite side of hollow locating piece 21 coordinates and support 1 is located with bent axle microcephaly's keyway.Solid locating piece is similarly cube structure, one side and long keyway 13 interference fit (when assembling, not needing housing screw to be fixed), and the opposite side of solid locating piece coordinates and support 1 is located with bent axle microcephaly's keyway.
Gear chamber 3 coordinates with main bearing journal by spacer, and top dead centre pointer 4 is contained in the certain position on its end face.The position of the top dead centre pointer 4 in gear chamber and the position of bent axle 5 are one to one, top dead centre pointer 4 is the finished product pointers that use in engine assembly, this pointer is screw thread by one side of gear chamber, be threaded connection in gear chamber, the top dead centre pointer position in gear chamber is by the determining positions of gear chamber upper screwed hole.
The support 1 of the survey instrument of this diesel engine top dead centre is by cylinder pilot hole and bent axle microcephaly's cylindrical clearance fit, and position by hollow locating piece assembly or solid locating piece, if be positioned at the top dead centre pointer of bent axle microcephaly's keyway top and drop on the width range of elongated top dead centre pointer measuring flume 16, illustrate that diesel engine piston is at top dead center position.
To sum up, the survey instrument of this diesel engine top dead centre is in the situation that being equipped with cylinder cap, whether can accurately detect the piston of diesel engine in top dead center position, and then guarantee the assembly quality of part, avoid occurring that engine oil consumption increases, produces blowby and fuel consume increase, and have a strong impact on engine performance.
The aforementioned description to concrete exemplary of the present invention is in order to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present invention and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (6)
1. a survey instrument for diesel engine top dead centre, is characterized in that, comprising:
Support, comprise: bent axle microcephaly location division and top dead centre pointer measurement section, the middle part of described bent axle microcephaly location division offers the cylinder pilot hole of the upper and lower surface that runs through this bent axle microcephaly location division, this cylinder pilot hole and bent axle microcephaly's cylindrical clearance fit is to locate described support, and the inner peripheral surface of described cylinder pilot hole offers axially extended long keyway; Described top dead centre pointer measurement section is extended along the direction straight up of described long keyway by the lateral surface of described bent axle microcephaly location division, and the top of this top dead centre pointer measurement section offers the top dead centre pointer measuring flume with certain width; And
Keeper, comprise: hollow locating piece assembly or solid locating piece, one side of described hollow locating piece assembly or solid locating piece coordinates with long keyway, and the opposite side of described hollow locating piece assembly or solid locating piece coordinates with bent axle microcephaly's keyway and support is located.
2. the survey instrument of diesel engine top dead centre according to claim 1, is characterized in that, described bent axle microcephaly location division is the square tabular of four limit chamferings.
3. the survey instrument of diesel engine top dead centre according to claim 1 and 2, it is characterized in that, the bottom surface, outer end of described long keyway offers the threaded hole extending straight up, described hollow locating piece assembly comprises again: hollow locating piece and housing screw, this hollow locating piece is cube structure and offers the ladder counterbore passing for described housing screw, by housing screw, described hollow locating piece is fixed in the long keyway of described support.
4. the survey instrument of diesel engine top dead centre according to claim 3, is characterized in that, the inner peripheral surface of the just right cylinder pilot hole of described threaded hole offers the opening of stepping down.
5. the survey instrument of diesel engine top dead centre according to claim 3, is characterized in that, a side of described hollow locating piece and long keyway clearance fit.
6. the survey instrument of diesel engine top dead centre according to claim 4, is characterized in that, described solid locating piece is cube structure, one side and long keyway interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251934.2A CN103994703B (en) | 2014-06-09 | 2014-06-09 | The survey tool of diesel engine top dead centre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251934.2A CN103994703B (en) | 2014-06-09 | 2014-06-09 | The survey tool of diesel engine top dead centre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103994703A true CN103994703A (en) | 2014-08-20 |
| CN103994703B CN103994703B (en) | 2016-08-24 |
Family
ID=51308938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410251934.2A Active CN103994703B (en) | 2014-06-09 | 2014-06-09 | The survey tool of diesel engine top dead centre |
Country Status (1)
| Country | Link |
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| CN (1) | CN103994703B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115108A (en) * | 2018-09-28 | 2019-01-01 | 上海汽车集团股份有限公司 | Crankshaft timing angle measuring device, engine timing angle measurement method and system |
| CN109297399A (en) * | 2018-09-28 | 2019-02-01 | 上海汽车集团股份有限公司 | Correct timing angle measurer, method and system |
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| DE20214337U1 (en) * | 2002-09-19 | 2004-02-26 | Robert Bosch Gmbh | Measuring device for scanning a cam track |
| CN201373739Y (en) * | 2009-03-13 | 2009-12-30 | 南车戚墅堰机车有限公司 | Diesel engine top dead center adjusting device |
| CN201476731U (en) * | 2009-09-01 | 2010-05-19 | 广西玉柴机器股份有限公司 | Upper dead point measurement tool of engine piston |
| JP4549332B2 (en) * | 2006-09-29 | 2010-09-22 | 株式会社牧野フライス製作所 | Tool positioning method and apparatus |
| CN101858722A (en) * | 2010-05-25 | 2010-10-13 | 中国兵器工业集团第七0研究所 | Detection device of working top dead center of diesel engine |
| CN202212758U (en) * | 2011-08-15 | 2012-05-09 | 广西玉柴机器股份有限公司 | Crankshaft driving calibration device |
| CN202361907U (en) * | 2011-11-14 | 2012-08-01 | 天津雷沃动力股份有限公司 | Tool for detecting top dead center of engine piston |
| CN203125433U (en) * | 2013-02-23 | 2013-08-14 | 广西玉柴机器股份有限公司 | Tool used for adjusting diesel engine oil supplying angle and top dead center of piston |
| CN203848779U (en) * | 2014-06-09 | 2014-09-24 | 广西玉柴机器股份有限公司 | Tool for measuring dead centers on diesel engine |
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2014
- 2014-06-09 CN CN201410251934.2A patent/CN103994703B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20214337U1 (en) * | 2002-09-19 | 2004-02-26 | Robert Bosch Gmbh | Measuring device for scanning a cam track |
| JP4549332B2 (en) * | 2006-09-29 | 2010-09-22 | 株式会社牧野フライス製作所 | Tool positioning method and apparatus |
| CN201373739Y (en) * | 2009-03-13 | 2009-12-30 | 南车戚墅堰机车有限公司 | Diesel engine top dead center adjusting device |
| CN201476731U (en) * | 2009-09-01 | 2010-05-19 | 广西玉柴机器股份有限公司 | Upper dead point measurement tool of engine piston |
| CN101858722A (en) * | 2010-05-25 | 2010-10-13 | 中国兵器工业集团第七0研究所 | Detection device of working top dead center of diesel engine |
| CN202212758U (en) * | 2011-08-15 | 2012-05-09 | 广西玉柴机器股份有限公司 | Crankshaft driving calibration device |
| CN202361907U (en) * | 2011-11-14 | 2012-08-01 | 天津雷沃动力股份有限公司 | Tool for detecting top dead center of engine piston |
| CN203125433U (en) * | 2013-02-23 | 2013-08-14 | 广西玉柴机器股份有限公司 | Tool used for adjusting diesel engine oil supplying angle and top dead center of piston |
| CN203848779U (en) * | 2014-06-09 | 2014-09-24 | 广西玉柴机器股份有限公司 | Tool for measuring dead centers on diesel engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115108A (en) * | 2018-09-28 | 2019-01-01 | 上海汽车集团股份有限公司 | Crankshaft timing angle measuring device, engine timing angle measurement method and system |
| CN109297399A (en) * | 2018-09-28 | 2019-02-01 | 上海汽车集团股份有限公司 | Correct timing angle measurer, method and system |
| CN109115108B (en) * | 2018-09-28 | 2023-12-08 | 上海汽车集团股份有限公司 | Crankshaft timing angle measuring device, engine timing angle measuring method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103994703B (en) | 2016-08-24 |
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