CN100447402C - Dynamic detecting equipment of pump internal axle axial fitting gap - Google Patents
Dynamic detecting equipment of pump internal axle axial fitting gap Download PDFInfo
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- CN100447402C CN100447402C CNB2004100892645A CN200410089264A CN100447402C CN 100447402 C CN100447402 C CN 100447402C CN B2004100892645 A CNB2004100892645 A CN B2004100892645A CN 200410089264 A CN200410089264 A CN 200410089264A CN 100447402 C CN100447402 C CN 100447402C
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention relates to a detection device of the axial clearance of an inner shaft in a pump body, which belongs to the field of mechanical part detection. The present invention comprises an upper part hold-down mechanism, a work piece locating mechanism, an axial direction climbing mechanism and an inner shaft rotary mechanism, wherein the upper part hold-down mechanism comprises a cylinder or an oil cylinder, a reference pressing block, a press barrel block, a press motor, a speed reducer, a synchronous belt, a puller rod, a press position sensor and a height measuring sensor; the cylinder or the oil cylinder is closely contacted with the end surface of the pump body to be used as the a reference pressing block. The press barrel block is arranged in the center hole of the reference pressing block, and is driven to move by the press motor via the speed reducer and the synchronous belt; the center hole of the press barrel block is provided with the puller rod of which the upper end is provided with the press position sensor, and the outer side of press barrel block is provided with the height measuring sensor; the work piece locating mechanism is arranged below the upper part hold-down mechanism, and the lower part of the work piece locating mechanism is the inner shaft rotary mechanism, and the lower part of the inner shaft rotary mechanism is the axial direction climbing mechanism. The present invention has the advantages of simple structure, good performance price ratio, reliable measure, objectivity, accuracy, high repeat accuracy, and simple and rapid operation.
Description
Technical field
What the present invention relates to is a kind of dynamic detecting equipment that is used for the mechanical detection technical field, specifically is a kind of dynamic detecting equipment of axial fit clearance of pump body inner shaft of production assembly process.
Background technique
Injection Pump is assembled by several mechanical parts such as fuel injection pump housing, pump oil mechanism, oil amount regulating mechanism, driving mechanism or part.Camshaft is the critical piece of Injection Pump driving mechanism, and is very tight to the axial clearance requirement of camshaft.This excesssive gap, the roller transmission part strengthens the impact on cam work surface, causes the premature wear of cam face and changes the fuel supply advance angle degree; Simultaneously easily cause camshaft galloping, the variation of fuel delivery generating period makes engine running not steady, and the engine operation performance is had a significant impact.Therefore this gap must be controlled in manufacturing flow process, must 100% detection.
By prior art documents, do not find identical with the technology of the present invention or similar bibliographical information as yet.Concrete operation method commonly used at present is a kind of to be manual inspection, this manual method is earlier two outer races to be pressed into respectively in the bearing hole at pump housing two ends, the interior axle that has been pressed into bearing inner ring is packed in the pump housing, measures height (be the degree of depth of the locating flange) h1 of inner shaft bearing outer shroud end face to the height h2 of pump housing end face and inner shaft bearing outer shroud end face to bearing locating flange face respectively with distance-measuring device; The difference of h1 and h2 is the measured value in internal axle axial gap, according to the requirement of interior axle assembly technology, chooses different adjustment pads then, guarantees to reach the assembling axial clearance of regulation with this.This manual inspection method equipment is simple, is static measurement but its shortcoming is measuring phase, and interior axle be a state of rest, the rotation status that measurement result fails to be reflected in real work down in spool the axial deviation and the cooperation worker of bearing itself poor, influence measuring accuracy.Another kind is a method for semi-automatically detecting, a special device is adopted in this semi-automatic detection, the pump assembly that at first an end has been fixed locating flange place on the pre-equipment frock (this moment this end the interior ring of inner shaft bearing, outer shroud has all assembled), the top compresses the outer race (amount of being pressed into of the outer race of this end has been reserved certain clearance) of the other end, axle rotated in rotating machinery drove, the interior axle of axial push rod jack-up moving displacement vertically is exactly the axial movement space of interior axle, this displacement amount is measured demonstration by the equipment upper sensor, by the amount of being pressed into of manual setting outer race to technological requirement; After upper part pressing device is decontroled, measure the height h2 of inner shaft bearing outer shroud end face to pump housing end face with distance-measuring device.Though this method internal axle under interior axle rotation status carries out axial pretightening, but the amount of being pressed into because of the manual setting outer shroud, repeatability and reliability are difficult to guarantee, be under no axial pretightening state power to the height h2 of pump housing end face simultaneously because of inner shaft bearing outer shroud end face, because bearing is in the axial micro-elastic return displacement and the swing of little amplitude, measuring accuracy also can change to some extent.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, a kind of dynamic detecting equipment of axial fit clearance of pump body inner shaft is provided, make it carry out direct dynamic measurement to the Injection Pump internal axle axial fitting gap, axle is dynamic rotary work state in remaining during measurement, and axle in when measuring, bearing all is in the actual conditions of pretension, avoided of the influence of static measurement and twice substep operating method to measuring accuracy and efficient, the measurement needed time is short, the repeatability height, measurement result is independent of operator's subjectivity operation, reaches objective, accurately, effect fast.
The present invention is achieved by the following technical solutions, the present invention includes: top hold-down mechanism, workpiece positioning means, axially lifting body, interior axle rotating machinery, its middle and upper part hold-down mechanism comprises: cylinder (or oil cylinder), benchmark briquetting, be pressed into a piece, be pressed into motor, speed reducer, synchronously band, top-fastening rod, be pressed into position transducer, height measuring transducer.Subject cylinder (or oil cylinder) moves up and down and is close to the benchmark briquetting of pump housing end face as measuring basis, this benchmark briquetting sidepiece has two perforated slots up and down, be pressed into position transducer and draw from last perforated slot and following perforated slot respectively, be convenient for measuring adjustment with the height measuring transducer; Be installed in the piece that is pressed into that conduct that can move up and down in the benchmark briquetting center hole and direct is pressed into shaft-cup spare, be pressed into a piece and move up and down as spiral through speed reducer and synchronous band by being pressed into motor; Be pressed into a top-fastening rod that relies on built-in spring to push up down all the time is installed in the piece center hole; The top-fastening rod upper end is installed and is pressed into position transducer; Be pressed into a piece outside height measuring transducer is installed.The workpiece positioning means is arranged on hold-down mechanism below, top, workpiece positioning means bottom is interior axle rotating machinery, axle rotation shift fork in being equipped with in the interior axle rotating machinery, keyway on interior axle rotation shift fork and the interior axle is complementary, interior axle rotating machinery rotates, and this shift fork enters in the keyway automatically by spring force, drives the together rotation of interior axle, axle rotating machinery rotary driving in when measuring with assurance, the dynamic measurement of interior axle when realizing detecting.Interior axle rotating machinery below upwards holds out against interior when having an axial lifting body assurance to measure, and axially in the lifting pin mechanism axial lifting pin is arranged, and is close to the technology centre hole inwall of interior axle lower end from the frock below, and is not moved axially by spring assurance and interior axle.
Being pressed into position transducer and can adopting touch sensor with the height measuring transducer, also can be noncontacting proximity sensor.Be pressed into motor and can adopt stepper motor, also can adopt AC servo motor.
During use, being pressed into motor is pressed into piezometric and goes into the shaft-cup spare that matches with pump body inner shaft to greater than design height 0.5～2mm by presetting, after driving pump body inner shaft and rotate some circles by rotary electric machine, axially jacking apparatus upwards holds out against pump body inner shaft, measure bit value by being pressed into position transducer this moment, make axial jacking apparatus decontrol upwards pressure, top hold-down mechanism inner spring holds out against pump body inner shaft downwards, measure down bit value by being pressed into position transducer this moment, and these two numerical difference between are the pump internal axle axial gap under the state at that time.When definite axial clearance in scope of design, the height measuring transducer directly read the height value of shaft-cup spare to pump housing exterior edge face, be convenient to directly satisfy the production process needs.
In whole measuring phase, the top impacting force of Injection Pump must be greater than lower shaft to pressure and the be pressed into power of outer race pressing mechanism when being pressed into outer race that lifting pin makes progress, and the measuring accuracy that the reaction force motion drive entire pump axon of avoiding axial lifting pin and outer race to be pressed into generation produces to displacement is inaccurate.
The present invention has significant advantage, and (1) mechanical structure is simple, can require to select equipment frock, instrument and instrument grade according to measuring accuracy, guarantees good cost performance.(2) measuring phase is reliable, and measurement result is objective and accurate.(3) repeatability height.(4) easy and simple to handle rapid, avoided the influence of twice operation to measuring accuracy and efficient, (5) have fully reflected the current intelligence of measurand under actual working state, have eliminated the influence to measurement result of each component tolerances and systematic error.Use when being suitable for production line and measuring in enormous quantities.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention includes: top hold-down mechanism 1, workpiece positioning means 2, axially lifting body 3, interior axle rotating machinery 4, its middle and upper part hold-down mechanism 1 comprises: cylinder or oil cylinder 5, benchmark briquetting 6, be pressed into a piece 7, be pressed into motor 8, speed reducer 9, be with 10 synchronously, top-fastening rod 11, be pressed into position transducer 12, height measuring transducer 13.Cylinder or oil cylinder 5 move up and down and are close to the benchmark briquetting 6 of pump housing end face as measuring basis, and these benchmark briquetting 6 sidepieces have two perforated slots up and down, are pressed into position transducer 12 and draw from last perforated slot and following perforated slot respectively with height measuring transducer 13; Be pressed into a piece 7 and be installed in benchmark briquetting 6 center holes, be pressed into a piece 7 by being pressed into motor 8 through speed reducer 9 be with 10 to move up and down synchronously as spiral directly as being pressed into shaft-cup spare 16; Be pressed into a top-fastening rod 11 is installed in a piece 7 center holes; Top-fastening rod 11 upper ends are installed and are pressed into position transducer 12; Be pressed into a piece 7 outsides height measuring transducer 13 is installed.Workpiece positioning means 2 is arranged on top hold-down mechanism 1 below, workpiece positioning means 2 bottoms are interior axle rotating machinery 4, axle rotation shift fork 14 in being equipped with in the interior axle rotating machinery 4, the keyway on interior axle rotation shift fork 14 and the interior axle is complementary, and there is an axial lifting body 3 interior axle rotating machinery 4 belows.
Be pressed into a piece 7 and be provided with spring 15, top-fastening rod 11 pushes up down all the time by this spring.Be pressed into position transducer 12 and be touch sensor, perhaps noncontacting proximity sensor with height measuring transducer 13.Be pressed into motor 8 and be stepper motor, perhaps AC servo motor.
Claims (6)
1, a kind of equipment of measuring the pump internal axle axial gap, comprise: top hold-down mechanism (1), workpiece positioning means (2), axial lifting body (3), interior axle rotating machinery (4), workpiece positioning means (2) is arranged on top hold-down mechanism (1) below, workpiece positioning means (2) bottom is interior axle rotating machinery (4), there is an axial lifting body (3) interior axle rotating machinery (4) below, it is characterized in that, top hold-down mechanism (1) comprising: cylinder or oil cylinder (5), benchmark briquetting (6), be pressed into a piece (7), be pressed into motor (8), speed reducer (9), be with synchronously (10), top-fastening rod (11), be pressed into position transducer (12), height measuring transducer (13), cylinder or oil cylinder (5) move up and down and are close to the benchmark briquetting (6) of pump housing end face as measuring basis, being pressed into a piece (7) is located in benchmark briquetting (6) center hole directly as being pressed into shaft-cup spare, being pressed into a piece (7) moves up and down as spiral through speed reducer (9) and synchronous band (10) by being pressed into motor (8), be pressed in a piece (7) center hole and be provided with top-fastening rod (11), top-fastening rod (11) upper end is provided with and is pressed into position transducer (12), is pressed into a piece (7) outside and is provided with a height measuring transducer (13).
2, the equipment in measurement pump internal axle axial as claimed in claim 1 gap, it is characterized in that, two perforated slots about benchmark briquetting (6) sidepiece has are pressed into position transducer (12) and height measuring transducer (13) is drawn from last perforated slot and following perforated slot respectively.
3, the equipment in measurement pump internal axle axial as claimed in claim 1 gap is characterized in that, is pressed into a piece (7) and is provided with spring (15), and top-fastening rod (11) is by this spring top down all the time.
4, the equipment in measurement pump internal axle axial as claimed in claim 1 gap is characterized in that, axle rotation shift fork (14) in being equipped with in the interior axle rotating machinery (4), and interior axle rotation shift fork (14) is complementary with keyway on the interior axle.
5, the equipment in measurement pump internal axle axial as claimed in claim 1 gap is characterized in that, is pressed into position transducer (12) and height measuring transducer (13) is touch sensor, perhaps noncontacting proximity sensor.
6, the equipment in measurement pump internal axle axial as claimed in claim 1 gap is characterized in that, is pressed into motor (8) and is stepper motor, perhaps AC servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100892645A CN100447402C (en) | 2004-12-09 | 2004-12-09 | Dynamic detecting equipment of pump internal axle axial fitting gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100892645A CN100447402C (en) | 2004-12-09 | 2004-12-09 | Dynamic detecting equipment of pump internal axle axial fitting gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1619139A CN1619139A (en) | 2005-05-25 |
| CN100447402C true CN100447402C (en) | 2008-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100892645A Expired - Fee Related CN100447402C (en) | 2004-12-09 | 2004-12-09 | Dynamic detecting equipment of pump internal axle axial fitting gap |
Country Status (1)
| Country | Link |
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| CN (1) | CN100447402C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102689171B (en) * | 2012-06-08 | 2014-08-27 | 上海康比利仪表有限公司 | Automatic accurate adjustment system for instrument movement clearance |
| CN105021157A (en) * | 2015-06-03 | 2015-11-04 | 机科发展科技股份有限公司 | A common-rail gear pump assembly detection system |
| CN109708604A (en) * | 2018-12-24 | 2019-05-03 | 日电产伺服电机（常州）有限公司 | A kind of measuring device and measurement method of axial gap |
| CN110567418A (en) * | 2019-10-10 | 2019-12-13 | 湖南东创智能装备有限公司 | Oil pump end face clearance detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058767A (en) * | 1998-02-27 | 2000-05-09 | The Timken Company | Measurement of wheel bearing end play |
| DE10251045A1 (en) * | 2002-11-02 | 2004-05-19 | Daimlerchrysler Ag | Shaft bearing axial play measurement arrangement comprises a measurement device that detects relative movement between a shaft and its housing when the shaft is subjected to a measurement force by a tensioning component |
-
2004
- 2004-12-09 CN CNB2004100892645A patent/CN100447402C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058767A (en) * | 1998-02-27 | 2000-05-09 | The Timken Company | Measurement of wheel bearing end play |
| DE10251045A1 (en) * | 2002-11-02 | 2004-05-19 | Daimlerchrysler Ag | Shaft bearing axial play measurement arrangement comprises a measurement device that detects relative movement between a shaft and its housing when the shaft is subjected to a measurement force by a tensioning component |
Non-Patent Citations (2)
| Title |
|---|
| 精密滚动轴承间隙测试装置的设计. 钱袁萍，王强.沙洲职业工学院学报，第2卷第2期. 1999 |
| 精密滚动轴承间隙测试装置的设计. 钱袁萍，王强.沙洲职业工学院学报，第2卷第2期. 1999 * |
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| Publication number | Publication date |
|---|---|
| CN1619139A (en) | 2005-05-25 |
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Granted publication date: 20081231 Termination date: 20111209 |