CN105115406B - A kind of eccentricity of crankshaft measuring device and its measurement method - Google Patents
A kind of eccentricity of crankshaft measuring device and its measurement method Download PDFInfo
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Abstract
The present invention relates to the technical fields of eccentricity of crankshaft detection, especially a kind of eccentricity of crankshaft measuring device and its measurement method, measuring device includes 90 degree of V-type locating pieces, measures cantilever and dial gauge, when detection, also need to bent axle to be measured to table reference block, first measuring device is zeroed to table on to table reference block, then measures the eccentricity of A type bent axles with measuring device.Other kinds of bent axle such as Type B bent axle is measured, according to mathematical formulaeThe connecting rod neck peak of A types and Type B bent axle is calculated to the distance b of the intersection point of 90 degree of V-type locating pieces, according to the difference △ b of b in A types and Type B bent axle, the eccentricity that Type B bent axle is obtained using measuring device and conversion method eliminates the step of specially being made to table reference block for Type B bent axle.The present invention not only solves the detection problem of eccentricity of crankshaft, also solves the borrow of device between the borrow and different type bent axle of same type bent axle difference inter process device, saves the manufacturing cost of a large amount of device.
Description
Technical field
The present invention relates to the technical field of eccentricity of crankshaft detection, especially a kind of eccentricity of crankshaft measuring device and its survey
Amount method.
Background technology
It is special tooling that eccentricity of crankshaft, which measures tooling, and the tooling is by eccentricity measuring device and to two big portion of table reference block
It is grouped as.The mock standard block that table reference block is made according to the size of bent axle to be measured.Its measurement method is：Eccentricity measures dress
It sets first on reference block to table, finds the maximum value that dial gauge is shown, percentage list index is adjusted to zero-bit, then will measure and fill
Set and move to bent axle to be measured, with trunnion excircle orientation, dial gauge numerical value is read by measuring connecting rod neck peak, this numerical value with it is right
The difference of table zero is practical eccentricity and theoretical difference.This eccentricity, which measures tooling, limitation, once main shaft
There are one change for neck diameter, connecting rod neck diameter, eccentricity, it is necessary to remake and be used for table reference block to table.Therefore even if
It is same bent axle, is also required in different processes different to table reference block.So each bent axle all correspond to it is several to table reference block,
It causes largely to waste.
Invention content
In order to overcome the shortcomings of existing technology, the present invention provides a kind of eccentricity of crankshaft measuring device and its measurement sides
Method.
The technical solution adopted by the present invention to solve the technical problems is：A kind of eccentricity of crankshaft measuring device, including 90
Degree V-type locating piece, measurement cantilever, dial gauge and connecting rod, 90 degree of V-type locating pieces are connected to measurement cantilever by connecting rod
In the following, the measurement cantilever other end is equipped with dial gauge, dial gauge contact is arranged below in the dial gauge for one end.
A kind of detection method carrying out eccentricity of crankshaft using above-mentioned measuring device, including eccentricity measuring device, A types are bent
Axis to table reference block, A types bent axle and Type B bent axle, the specific steps are：
1）90 degree of V-type locating pieces above eccentricity measuring device are rotated back and forth around to table reference block center first, are looked for
It is stopped after the maximum value position shown on to dial gauge, and by the pointer regulation on dial gauge to zero-bit；
2）By step 1）In 90 degree of V-type locating pieces of eccentricity of crankshaft measuring device for adjusting around A type bent axles master
Journal centre rotates back and forth, and is stopped after finding the maximum value position shown on dial gauge, and read, and the numerical value on existing dial gauge is just
It is the eccentricity value of A type bent axles；
3）It is assumed that the trunnion radius R1 of A type bent axles, connecting rod neck radius R2, by 90 degree of V-type locating piece intersection points to main shaft
The distance of center line is a, and the distance of connecting rod neck peak to the intersection point of 90 degree V-type locating pieces is b, eccentricity of crankshaft c, according to
Trigonometric function obtains, and establish relation of equal quantity formula and beFor datum, b is to calculate
Obtain number；
4）When measuring the eccentricity of Type B bent axle using eccentricity measuring device, step 3 is utilized）Mathematic calculation obtain
Go out the b numerical value of Type B bent axle, then the difference △ b being calculated between the b numerical value of Type B bent axle and the b numerical value of A type bent axles；
5）Determine the eccentricity of Type B bent axle.
According to another embodiment of the invention, further comprise that the step 5 determines the eccentricity method of Type B bent axle,
Dial gauge data above above eccentricity measuring device is adjusted to zero-bit, then dial gauge data above is adjusted to zero-bit
Eccentricity measuring device rotated back and forth around the trunnion center of Type B bent axle, find the maximum value position shown on dial gauge
After stop, read data, the difference in this data and step between calculated △ b is exactly the eccentricity of crankshaft of Type B bent axle.
According to another embodiment of the invention, further comprise that the step 5 determines the eccentricity method of Type B bent axle,
According to step 4）Difference △ b between the b numerical value and the b numerical value of A type bent axles of middle Type B bent axle, above eccentricity measuring device
Dial gauge data above is adjusted to the numerical value of negative △ b, then eccentricity measuring device is come around the trunnion center of Type B bent axle
Convolution turns, and is stopped after finding the maximum value position shown on dial gauge, reads data, this data is that the bent axle of Type B bent axle is inclined
The heart away from.
The invention has the advantages that eccentricity of crankshaft measuring device and measurement method not only solve eccentricity of crankshaft
Detection problem, and solve the borrow of same type bent axle difference inter process eccentricity of crankshaft measuring device, also solve not
The borrow of eccentricity of crankshaft measuring device between same type bent axle saves the production costs of a large amount of eccentricity of crankshaft measuring device
With.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the front view of the eccentricity of crankshaft measuring device of the present invention；
Fig. 2 is the left view of the eccentricity of crankshaft measuring device of the present invention；
Fig. 3 is front view of eccentricity of crankshaft measuring device when on locating piece to table；
Fig. 4 is left view of eccentricity of crankshaft measuring device when on locating piece to table；
Fig. 5 is front view when eccentricity of crankshaft measuring device measures A type eccentricity of crankshaft；
Fig. 6 is left view when eccentricity of crankshaft measuring device measures A type eccentricity of crankshaft；
Fig. 7 is front view when eccentricity of crankshaft measuring device measures Type B eccentricity of crankshaft；
Fig. 8 is left view when eccentricity of crankshaft measuring device measures Type B eccentricity of crankshaft.
1. 90 degree of V-type locating pieces in figure, 2. measurement cantilevers, 3. dial gauges, 4. connecting rods, 5. dial gauge contacts, 6.
To table reference block, 7. A type bent axles, 8. Type B bent axles.
Specific implementation mode
（Embodiment 1）
As shown in Figure 1 and Figure 2, a kind of eccentricity of crankshaft measuring device, including 90 degree of V-type locating pieces 1, measurement cantilever 2, hundred
Divide 4,90 degree of V-type locating pieces 1 of table 3 and connecting rod to be connected to by connecting rod 4 and measures 2 one end of cantilever in the following, measuring cantilever 2 separately
One end is equipped with dial gauge 3, and dial gauge contact 5 is arranged below in dial gauge 3.
After the eccentricity for measuring A type bent axles using eccentricity of crankshaft measuring device as depicted in figs. 1 and 2, phase is recycled
With eccentricity of crankshaft measuring device measure the eccentricity of Type B bent axle of different bent axles when, such as Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and
Steps are as follows shown in Fig. 8, when specific implementation：Including eccentricity measuring device, A type bent axles to table reference block 6,7 He of A types bent axle
Type B bent axle 8；
1）As shown in Figure 3 and Figure 4, first by 90 degree of V-type locating pieces 1 above eccentricity measuring device around to table reference block
6 centers rotate back and forth, and are stopped after finding the maximum value position shown on dial gauge 3, and by the pointer regulation on dial gauge 3 to zero
Position；
2）As shown in Figure 5 and Figure 6, by step 1）In 90 degree of V-type locating pieces 1 of eccentricity of crankshaft measuring device for adjusting
It rotates back and forth, is stopped after finding the maximum value position shown on dial gauge 3, and read around the trunnion center of A types bent axle 7,
Numerical value on present dial gauge 3 is exactly the eccentricity value of A types bent axle 7；
3）As shown in Figure 5 and Figure 6, it is assumed that the trunnion radius R1 of A types bent axle 7, connecting rod neck radius R2 are determined by 90 degree of V-types
The distance of position 1 intersection point of block to the center line of main shaft is a, and the distance of connecting rod neck peak to the intersection point of 90 degree of V-type locating pieces 1 is b,
Eccentricity of crankshaft is c, is obtained according to trigonometric function, and establish relation of equal quantity formula and beWherein R1, R2 and c are datum, and b is to be calculated
Number；
4）As shown in Figure 7 and Figure 8, when measuring the eccentricity of Type B bent axle 8 using eccentricity measuring device, step 3 is utilized）
Mathematic calculation obtain the b numerical value of Type B bent axle 8, then the b numerical value of the b numerical value and A types bent axle 7 of Type B bent axle 8 is calculated
Between difference △ b；
5）As shown in Figure 7 and Figure 8,3 data above of dial gauge above eccentricity measuring device is adjusted to zero-bit, then will
3 data above of dial gauge is adjusted to the eccentricity measuring device of zero-bit and is rotated back and forth around the trunnion center of Type B bent axle 8,
It is stopped after finding the maximum value position shown on dial gauge 3, reading data, in this data and step 4 between calculated △ b
Difference is exactly the eccentricity of crankshaft of Type B bent axle 8.
（Embodiment 2）
As depicted in figs. 1 and 2, a kind of eccentricity of crankshaft measuring device, including 90 degree of V-type locating pieces 1, measurement cantilever 2, hundred
Divide 4,90 degree of V-type locating pieces 1 of table 3 and connecting rod to be connected to by connecting rod 4 and measures 2 one end of cantilever in the following, measuring cantilever 2 separately
One end is equipped with dial gauge 3, and dial gauge contact 5 is arranged below in dial gauge 3.
After the eccentricity for measuring A type bent axles using eccentricity of crankshaft measuring device as depicted in figs. 1 and 2, phase is recycled
With eccentricity of crankshaft measuring device measure the eccentricity of Type B bent axle of different bent axles when, such as Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and
Steps are as follows shown in Fig. 8, when specific implementation：Including eccentricity measuring device, A type bent axles to table reference block 6,7 He of A types bent axle
Type B bent axle 8；
1）As shown in Figure 3 and Figure 4, first by 90 degree of V-type locating pieces 1 above eccentricity measuring device around to table reference block
6 centers rotate back and forth, and are stopped after finding the maximum value position shown on dial gauge 3, and by the pointer regulation on dial gauge 3 to zero
Position；
2）As shown in Figure 5 and Figure 6, by step 1）In 90 degree of V-type locating pieces 1 of eccentricity of crankshaft measuring device for adjusting
It rotates back and forth, is stopped after finding the maximum value position shown on dial gauge 3, and read around the trunnion center of A types bent axle 7,
Numerical value on present dial gauge 3 is exactly the eccentricity value of A types bent axle 7；
3）As shown in Figure 5 and Figure 6, it is assumed that the trunnion radius R1 of A types bent axle 7, connecting rod neck radius R2 are determined by 90 degree of V-types
The distance of position 1 intersection point of block to the center line of main shaft is a, and the distance of connecting rod neck peak to the intersection point of 90 degree of V-type locating pieces 1 is b,
Eccentricity of crankshaft is c, is obtained according to trigonometric function, and establish relation of equal quantity formula and beWherein R1, R2 and c are datum, and b is to be calculated
Number；
4）As shown in Figure 7 and Figure 8, when measuring the eccentricity of Type B bent axle 8 using eccentricity measuring device, step 3 is utilized）
Mathematic calculation obtain the b numerical value of Type B bent axle 8, then the b numerical value of the b numerical value and A types bent axle 7 of Type B bent axle 8 is calculated
Between difference △ b；
5）As shown in Figure 7 and Figure 8, according to step 4）Difference between the b numerical value and the b numerical value of A types bent axle 7 of middle Type B bent axle 8
Value △ b adjust 3 data above of dial gauge above eccentricity measuring device to the numerical value of negative △ b, then eccentricity is measured and is filled
It sets and is rotated back and forth around the trunnion center of Type B bent axle 8, stopped after finding the maximum value position shown on dial gauge 3, read number
According to this data is the eccentricity of crankshaft of Type B bent axle 8；
Eccentricity of crankshaft measuring device and measurement method according to the present invention, A types bent axle and Type B bent axle are bent axle
Code name, rather than model, preparation to table reference block can be different types of bent axle to table reference block, current invention assumes that being
It is A type bent axles to table base to table reference block when measuring A types bent axle and eccentricity with the different types of Type B bent axle of A type bent axles
Then quasi- block recycles measuring device and conversion method to obtain the eccentricity of Type B bent axle, eliminates and specially made for Type B bent axle
The step of to table reference block.The detection problem of eccentricity of crankshaft is not only solved, and solves same type bent axle difference process
Between eccentricity of crankshaft measuring device borrow, also solve the borrow of eccentricity of crankshaft measuring device between different type bent axle, save
The manufacturing cost of a large amount of eccentricity of crankshaft measuring device is saved.
Claims (3)
1. a kind of crankshaft eccentric distance measurement method, including eccentricity measuring device, which includes 90 degree of V-type locating pieces
（1）, measure cantilever（2）, dial gauge（3）And connecting rod（4）, 90 degree of V-type locating pieces（1）Pass through connecting rod（4）It is connected to
Measure cantilever（2）One end is in the following, the measurement cantilever（2）The other end is equipped with dial gauge（3）, the dial gauge（3）It is arranged below
Dial gauge contact（5）, characterized in that A type bent axles to table reference block（6）, A type bent axles（7）With Type B bent axle（8）, specific
Step is：
1）First by 90 degree of V-type locating pieces above eccentricity measuring device（1）Around to table reference block（6）Center rotates back and forth,
Find dial gauge（3）It is stopped after the maximum value position of upper display, and by dial gauge（3）On pointer regulation to zero-bit；
2）By step 1）In 90 degree of V-type locating pieces of eccentricity of crankshaft measuring device for adjusting（1）Around A type bent axles（7）'s
Trunnion center rotates back and forth, and finds dial gauge（3）It stops, and reads after the maximum value position of upper display, existing dial gauge（3）On
Numerical value be exactly A type bent axles（7）Eccentricity value；
3）It is assumed that A type bent axles（7）Trunnion radius R1, connecting rod neck radius R2, by 90 degree of V-type locating pieces（1）Intersection point is to main shaft
Center line distance be a, connecting rod neck peak to 90 degree of V-type locating pieces（1）The distance of intersection point be b, eccentricity of crankshaft is
C obtains a=R1/sin45 ° according to trigonometric function, and establishes relation of equal quantity formula and beThat is c+ R2
=R1/sin45 ° of+b, wherein R1, R2 and c are datum, and b is that number is calculated；
4）Type B bent axle is measured using eccentricity measuring device（8）Eccentricity when, utilize step 3）Mathematic calculation obtain
Type B bent axle（8）B numerical value, then Type B bent axle is calculated（8）B numerical value and A type bent axles（7）B numerical value between difference △
b；
5）Determine Type B bent axle（8）Eccentricity.
2. a kind of crankshaft eccentric distance measurement method according to claim 1, characterized in that the step 5 determines Type B bent axle
（8）Eccentricity method, by dial gauge above eccentricity measuring device（3）Data above is adjusted to zero-bit, then by dial gauge
（3）Data above adjusts the eccentricity measuring device to zero-bit around Type B bent axle（8）Trunnion center rotate back and forth, look for
To dial gauge（3）It is stopped after the maximum value position of upper display, reads data, this data and step（4）In between calculated △ b
Difference be exactly Type B bent axle（8）Eccentricity of crankshaft.
3. a kind of crankshaft eccentric distance measurement method according to claim 1, characterized in that the step 5 determines Type B bent axle
（8）Eccentricity method, according to step 4）Middle Type B bent axle（8）B numerical value and A type bent axles（7）B numerical value between difference △
B, dial gauge above eccentricity measuring device（3）Data above is adjusted to the numerical value of negative △ b, then by eccentricity measuring device
Around Type B bent axle（8）Trunnion center rotate back and forth, find dial gauge（3）It stops, reads after the maximum value position of upper display
Data, this data are Type B bent axle（8）Eccentricity of crankshaft.
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| CN105588503A (en) * | 2015-12-10 | 2016-05-18 | 芜湖市甬微制冷配件制造有限公司 | Gauge for eccentric distance of crankshaft |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193028A2 (en) * | 2000-09-29 | 2002-04-03 | Toyoda Koki Kabushiki Kaisha | Method for measuring work portion and machining method |
| CN101608896A (en) * | 2009-07-17 | 2009-12-23 | 北京二七轨道交通装备有限责任公司 | A kind of testing tool of crankshaft-link rod pin and detection method |
| CN201532181U (en) * | 2009-11-06 | 2010-07-21 | 广州柴油机厂 | Tool for detecting eccentricity of crankshaft crooked neck |
| CN201583240U (en) * | 2009-11-18 | 2010-09-15 | 南车资阳机车有限公司 | Check tool for measuring eccentricity of crankshaft |
| CN201974150U (en) * | 2011-03-31 | 2011-09-14 | 桂林福达曲轴有限公司 | Tool for detecting symmetry degree of key slot crankshaft of automobile engine |
| CN102997827A (en) * | 2012-11-16 | 2013-03-27 | 无锡麦铁精密机械制造有限公司 | Eccentricity gauge |
| CN204115638U (en) * | 2014-11-07 | 2015-01-21 | 神龙汽车有限公司 | Crankshaft journal following measurement device |
-
2015
- 2015-09-22 CN CN201510605626.XA patent/CN105115406B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193028A2 (en) * | 2000-09-29 | 2002-04-03 | Toyoda Koki Kabushiki Kaisha | Method for measuring work portion and machining method |
| CN101608896A (en) * | 2009-07-17 | 2009-12-23 | 北京二七轨道交通装备有限责任公司 | A kind of testing tool of crankshaft-link rod pin and detection method |
| CN201532181U (en) * | 2009-11-06 | 2010-07-21 | 广州柴油机厂 | Tool for detecting eccentricity of crankshaft crooked neck |
| CN201583240U (en) * | 2009-11-18 | 2010-09-15 | 南车资阳机车有限公司 | Check tool for measuring eccentricity of crankshaft |
| CN201974150U (en) * | 2011-03-31 | 2011-09-14 | 桂林福达曲轴有限公司 | Tool for detecting symmetry degree of key slot crankshaft of automobile engine |
| CN102997827A (en) * | 2012-11-16 | 2013-03-27 | 无锡麦铁精密机械制造有限公司 | Eccentricity gauge |
| CN204115638U (en) * | 2014-11-07 | 2015-01-21 | 神龙汽车有限公司 | Crankshaft journal following measurement device |
Non-Patent Citations (2)
| Title |
|---|
| 利用通用量具检测曲轴关键几何关系的方法;梁海珍等;《煤矿机械》;20120430;第130-132页 * |
| 车削偏心工件;陈宏钧等;《机械工人（冷加工）》;20001231;第44-46页 * |
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