CN105371801A - Air valve gap regulating washer matching measurement instrument and washer matching method - Google Patents
Air valve gap regulating washer matching measurement instrument and washer matching method Download PDFInfo
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- CN105371801A CN105371801A CN201510942101.5A CN201510942101A CN105371801A CN 105371801 A CN105371801 A CN 105371801A CN 201510942101 A CN201510942101 A CN 201510942101A CN 105371801 A CN105371801 A CN 105371801A
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- cam
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
Abstract
The invention discloses an air valve gap regulating washer matching measurement instrument and a washer matching method. The measurement instrument is used for choosing and matching the washer type between a camshaft and an air valve tappet; the camshaft is provided with a cam main shaft; the cam main shaft is provided with a plurality of cams; the air valve gap regulating washer matching measurement instrument comprises a first measurement mechanism used for measuring the distance between the rim of a bottom of a cylinder cover camshaft hole and the top of the air valve tappet, a second measurement mechanism used for measuring the difference between the radius of the base radius of the cam and the radius of the cam main shaft, and an industrial personal computer used for storing measurement data of the first measurement mechanism and the second measurement mechanism. The invention designs two measurement mechanisms and standard members to perform semi-automatic measurement on the distance between the rim of a bottom of a cylinder cover camshaft hole and the top of the air valve tappet and the difference between the radius of the base radius of the cam and the radius of the cam main shaft, and can fast and accurately calculate the thickness values between the various cams on the camshaft and the air valve tappet. The parameters of the used standard member are used after measurement and calibration, which greatly improves the matching efficiency of the washer.
Description
Technical field
The invention belongs to technical field of engines, particularly relate to valve clearance adjustment pad apolegamy measuring instrument and pad matching method.
Background technology
In the assembling process of engine, adjustment valve clearance is one of link important in engine assembly process, in assembling process, install the adjustment that cylinder cover then will carry out valve clearance, whether suitable valve clearance is directly has influence on the power performance of engine, fuel consume and discharge, still has many transmitter manufacturers to adopt tappet and pad to carry out valve gap adjustment so far.Air valve pad can be divided into tens kinds by thickness, adds the application of polytype valve, brings inconvenience to the selection of air valve pad and valve tappet.The tool structure of existing selection air valve pad is complicated, complex operation, and price and maintenance cost and costliness thereof, limit most of engine production producer to a great extent to the introduction of such frock and use.
At present, select suitable pad, most of manufacturer mainly adopts traditional measurer as slide calliper rule, milscale etc., first assembles to pad and after dividing into groups, is finally measured by three-coordinates measuring machine.This hand-held gauge reading easily produces personal error, and efficiency is low, and the data statistic analysis in later stage is difficult, and the gap after assembling is still defective, needs secondary to do over again.
Summary of the invention
The present invention proposes valve clearance adjustment pad apolegamy measuring instrument and pad matching method, by matching suitable adjustment pad to the measurement of correlation of cylinder cap tappet and camshaft to ensure the accuracy of gap width for solving above-mentioned Problems existing of the prior art.The present invention for the taked technical scheme that solves the problem is: valve clearance adjustment pad apolegamy measuring instrument, for the apolegamy of gasket-type between camshaft and valve lifter, camshaft comprises cam main shaft, cam main shaft is fixed with multiple cam, it comprise for measure first measuring mechanism of cylinder cap camshaft hole bottom margin to the spacing on valve lifter top, the difference for the base radius and cam main shaft radius of measuring cam the second co-ordinate measuring machine structure, for storing the industrial computer of the first measuring mechanism and the second co-ordinate measuring machine structure measurement data;
Described first measuring mechanism comprises base, standard cams main shaft, base is fixed with multiple back-up block from left to right successively, the top of described back-up block is equipped with semicircle groove, described multiple semicircle groove is coaxial, the base of the left and right sides of each back-up block is equipped with calibrated bolck, shape and the position of described semicircle groove and cylinder cap camshaft hole are corresponding, the position of described calibrated bolck is corresponding with the position of valve lifter on engine, vertical distance between the bottom land of described semicircle groove and calibrated bolck top equals the gauged distance between camshaft holes on engine cylinder head bottom margin to valve lifter top, standard cams main shaft is placed in semicircle groove, and the standard cams axle directly over calibrated bolck and semicircle groove is provided with perforation, and in perforation, be provided with the first displacement transducer, described first displacement sensor probe stretches out below standard cams main shaft,
Described second measuring mechanism comprises workbench, standard cams axle, workbench is fixed with two V-blocks for supporting standard cams axle, standard cams axial compression gripping members, workbench is fixed with the measurement mechanism of the difference of base radius for measuring cam and cam main shaft radius, described measurement mechanism comprises base plate, base plate slidably connects slide block, described slide block is connected with cylinder, base plate is provided with the limited block for limiting slide block normal place, slide block is fixed with at least two second displacement sensors successively along standard cams axle axis direction, the telescopic direction of described second displacement sensor probe and standard cams axle intersect vertical axis, one of them second displacement sensor probe is corresponding with the position of the main shaft of standard cams axle, all the other second displacement sensor probes are corresponding with the base circle position of standard cams axle overhead cam respectively, described first displacement transducer and second displacement sensor are tangent displacement sensor.
Further, the slide block of measurement mechanism is fixed with three second displacement sensors successively along the axis direction of standard cams axle, be positioned at the second middle displacement sensor probe corresponding with the main spindle's of standard cams axle, the second displacement sensor probe being positioned at both sides is corresponding with the base circle position of two adjacent cams on standard cams axle respectively.
Further, workbench is fixed with four measurement mechanisms, second displacement sensor probe being positioned at centre of described four measurement mechanisms is all corresponding with the position of the main shaft of standard cams axle, described four measurement mechanisms are respectively the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism, and second displacement sensor probe being positioned at both sides of described first measurement mechanism is corresponding with two base circle position towards the cam in standard cams axle front respectively; Second displacement sensor probe being positioned at both sides of described second measurement mechanism is corresponding with two base circle position towards the cam at standard cams axle rear respectively; Second displacement sensor probe being positioned at both sides of described 3rd measurement mechanism is corresponding with two base circle position towards the cam below standard cams axle respectively; The base circle position of the cam of the second displacement sensor probe being positioned at both sides respectively with two above standard cams axle of described 4th measurement mechanism is corresponding.
Use the adjustment of the valve clearance described in claim 3 pad apolegamy measuring instrument to carry out the matching method of pad, it is characterized in that, comprise the following steps:
S1: be placed in semicircle groove by standard cams main shaft, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S2: hand-held standard cams main shaft is placed in cylinder cap camshaft hole, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S3: standard cams axle to be placed on two V-blocks and with the cam that standard cams axial compression gripping members clamps standard cams axle left end, standard cams axle and two V-blocks to be compressed, when the slide block of the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism is slided into corresponding limited block by control cylinder action, the basic circle of each cam on standard cams axle is measured, will transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S4: camshaft to be measured to be placed on two V-blocks and with the cam that standard cams axial compression gripping members clamps camshaft left end to be measured, camshaft to be measured and two V-blocks to be compressed, when the slide block of the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism is slided into corresponding limited block by control cylinder action, the basic circle of each cam on camshaft to be measured is measured, will transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S5: the data that the first displacement transducer is measured by industrial computer in step s 2 and the data that the first displacement transducer is measured in step sl carry out doing difference, calculate the site error of the site error of valve lifter and calibrated bolck, cylinder cap camshaft hole and semicircle groove, then calculate the actual range A between cylinder cap camshaft hole bottom margin to valve lifter top according to the vertical distance between the bottom land of semicircle groove and calibrated bolck top;
The data that second displacement sensor is measured by industrial computer in step s 4 which and the data that second displacement sensor is measured in step s3 carry out doing difference, calculate the site error of the site error of main shaft with the main shaft of standard cams axle of camshaft to be measured, camshaft overhead cam basic circle to be measured and corresponding cam base circle on standard cams axle, then calculate the actual difference B of the base radius of each cam on camshaft to be measured and the difference of camshaft main shaft radius to be measured according to the standard value of the base radius of each cam on standard cams axle and the difference of standard cams axle main shaft radius;
Last industrial computer calculates the one-tenth-value thickness 1/10 of required pad on each valve lifter according to the computing formula of actual range A, actual difference B, spacer thickness d, the computing formula of described spacer thickness d is: the error that spacer thickness d=actual range A-actual difference B-standard valve gap width C+ experiential modification value D, experiential modification value D are presented as camshaft oil film thickness, gap between valve lifter and pad is introduced.
The present invention calculates the one-tenth-value thickness 1/10 of pad between each cam and valve lifter on camshaft respectively rapidly and accurately to the semi-automatic measuring of the difference B of the distance A between cylinder cap camshaft spindle hole bottom margin to valve lifter top and radius of cam base-circle and cam main shaft radius by design two measuring mechanisms and standard component, the parameter of standard component used uses after being through measurement and calibration, its precision comparison is high, thus ensure that the accuracy that standard component is measured and accuracy, substantially increase the selecting efficiency of pad.
Accompanying drawing explanation
Fig. 1 is the distance schematic diagram between cylinder cap camshaft spindle hole bottom margin to valve lifter top;
Fig. 2 is the positional structure schematic diagram of camshaft, pad and tappet;
Fig. 3 is overall perspective view of the present invention;
Fig. 4 is the stereographic map of the first measuring mechanism in Fig. 3;
Fig. 5 is the stereographic map of the second measuring mechanism in Fig. 3.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As depicted in figs. 1 and 2, the present invention is used for the apolegamy of pad 3 type between camshaft 4 and valve lifter 2, camshaft 4 comprises cam main shaft 6, cam main shaft 6 is fixed with multiple cam 5, camshaft 4 is divided into admission cam shaft and exhaust cam shaft, and the present invention adopts the distance A first measured between cylinder cap camshaft spindle hole 1 bottom margin to valve lifter 2 top; The base radius of cam 4 and the difference B of cam main shaft 6 radius, then according to required standard valve gap width C, calculate the thickness d of required pad 3, its computing formula is:
d=A-B-C+D
In formula, D is experiential modification value, is presented as camshaft 4 oil film thickness, error that gap between valve lifter 2 and pad 3 is introduced.
As shown in Figure 3, the present invention includes for measure cylinder cap camshaft hole 1 bottom margin to the spacing A on valve lifter 2 top the first measuring mechanism 9, for measure the difference B of cam 5 base radius and cam main shaft 6 radius the second co-ordinate measuring machine structure 7, for storing the industrial computer 8 of the first measuring mechanism 9 and the second co-ordinate measuring machine structure 7 measurement data;
As shown in Figure 4, described first measuring mechanism 9 comprises base 10, standard cams main shaft 15, base 10 is fixed with multiple back-up block 11 from left to right successively, the top of described back-up block 11 is equipped with semicircle groove 12, described multiple semicircle groove 12 is coaxial, the base 10 of the left and right sides of each back-up block 11 is equipped with calibrated bolck 13, shape and the position of described semicircle groove 12 and cylinder cap camshaft hole 1 are corresponding, the position of described calibrated bolck 13 is corresponding with the position of valve lifter on engine 2, vertical distance between the bottom land of described semicircle groove 12 and calibrated bolck 13 top equals the gauged distance between camshaft holes on engine cylinder head 1 bottom margin to valve lifter 2 top, standard cams main shaft 15 is placed in semicircle groove 12, standard cams main shaft 15 directly over calibrated bolck 13 and semicircle groove 12 is provided with perforation, in perforation, be all provided with the first displacement transducer 16, described first displacement sensor probe 14 stretches out below standard cams main shaft 15,
As shown in Figure 5, described second measuring mechanism 7 comprises workbench 22, standard cams axle 24, workbench 22 is fixed with two V-blocks 21 for supporting standard cams axle 24, standard cams axial compression gripping members 33, workbench 22 is fixed with four measurement mechanisms for the difference of the base radius and cam main shaft 6 radius of measuring cam 5, described four measurement mechanisms are identical, it is respectively the first measurement mechanism 34, second measurement mechanism 20, 3rd measurement mechanism 17, 4th measurement mechanism 23, described measurement mechanism comprises base plate 18, base plate 18 slidably connects slide block 19, described slide block 19 is connected with cylinder (not marking in figure), base plate 18 is provided with the limited block 35 for limiting slide block 19 normal place, slide block 19 is fixed with three second displacement sensors successively along the axis direction of standard cams axle 24, the telescopic direction of described second displacement sensor probe and the intersect vertical axis of standard cams axle 24, the probe being positioned at middle second displacement sensor 30 is corresponding with the position of standard cams axle 24 main shaft, be positioned at the second displacement sensor 29 of both sides, the probe of 31 is corresponding with the base circle position of two adjacent cams respectively, second displacement sensor probe 29,31 being positioned at both sides of described first measurement mechanism 34 is corresponding with two base circle position towards the cam 28 in standard cams axle 24 front respectively, second displacement sensor probe being positioned at both sides of described second measurement mechanism 20 is corresponding with two base circle position towards the cam 26 at standard cams axle 24 rear respectively, second displacement sensor probe being positioned at both sides of described 3rd measurement mechanism 17 is corresponding with two base circle position towards the cam 32 below standard cams axle 24 respectively, the base circle position of the cam 25 of the second displacement sensor probe being positioned at both sides respectively with two above standard cams axle 24 of described 4th measurement mechanism 23 is corresponding, and described first displacement transducer 16 and second displacement sensor are tangent displacement sensor.
The matching method carrying out pad comprises the following steps:
S1: be placed on by standard cams main shaft 15 in semicircle groove 12, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer 8 stand-by;
S2: hand-held standard cams main shaft 15 is placed in cylinder cap camshaft hole, cylinder cap camshaft hole is semicircle, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S3: standard cams axle 24 to be placed on two V-blocks 21 and with the cam that standard cams axial compression gripping members 33 clamps standard cams axle 24 left end, standard cams axle 24 and two V-blocks 21 to be compressed, control cylinder (not marking in figure) action is by the first measurement mechanism 34, second measurement mechanism 20, 3rd measurement mechanism 17, when the slide block of the 4th measurement mechanism 23 slides into corresponding limited block 35, the basic circle of each cam on standard cams axle 24 is measured, to transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer 8 stand-by,
S4: camshaft to be measured to be placed on two V-blocks 21 and with the cam that standard cams axial compression gripping members 33 clamps camshaft left end to be measured, camshaft to be measured and two V-blocks 21 to be compressed, when the slide block of the first measurement mechanism 34, second measurement mechanism 20, the 3rd measurement mechanism 17, the 4th measurement mechanism 23 is slided into corresponding limited block by control cylinder action, the basic circle of each cam on camshaft to be measured is measured, will transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer 8 stand-by;
S5: the data that the first displacement transducer is measured by industrial computer 8 in step s 2 and the data that the first displacement transducer is measured in step sl carry out doing difference, calculate the site error of the site error of valve lifter and calibrated bolck 13, cylinder cap camshaft hole and semicircle groove 11, then calculate the actual range A between cylinder cap camshaft hole bottom margin to valve lifter top according to the vertical distance between the bottom land of semicircle groove 11 and calibrated bolck 13 top;
The data that second displacement sensor is measured by industrial computer 8 in step s 4 which and the data that second displacement sensor is measured in step s3 carry out doing difference, calculate the site error of the main shaft of camshaft to be measured and the main shaft of standard cams axle 24, the site error of camshaft overhead cam basic circle to be measured and corresponding cam base circle on standard cams axle 24, then the actual difference B of the base radius of each cam on camshaft to be measured and the difference of camshaft main shaft radius to be measured is calculated according to the standard value of the difference of the base radius of each cam on standard cams axle 24 and the main shaft radius of standard cams axle 24,
Last industrial computer 8 calculates the one-tenth-value thickness 1/10 of required pad on each valve lifter according to the computing formula of actual range A, actual difference B, spacer thickness d, the computing formula of described spacer thickness d is: the error that spacer thickness d=actual range A-actual difference B-standard valve gap width C+ experiential modification value D, experiential modification value D are presented as camshaft oil film thickness, gap between valve lifter and pad is introduced.
The present invention calculates the one-tenth-value thickness 1/10 of pad between each cam and valve lifter on camshaft respectively rapidly and accurately to the semi-automatic measuring of the difference B of the distance A between cylinder cap camshaft spindle hole 1 bottom margin to valve lifter 2 top and radius of cam base-circle and cam main shaft radius by design two measuring mechanisms and standard component, the parameter of standard component used uses after being through measurement and calibration, its precision comparison is high, thus ensure that the accuracy that standard component is measured and accuracy, substantially increase the selecting efficiency of pad.
Claims (4)
1. valve clearance adjustment pad apolegamy measuring instrument, for the apolegamy of gasket-type between camshaft and valve lifter, camshaft comprises cam main shaft, cam main shaft is fixed with multiple cam, it is characterized in that, comprise for measure first measuring mechanism of cylinder cap camshaft hole bottom margin to the spacing on valve lifter top, the difference for the base radius and cam main shaft radius of measuring cam the second co-ordinate measuring machine structure, for storing the industrial computer of the first measuring mechanism and the second co-ordinate measuring machine structure measurement data;
Described first measuring mechanism comprises base, standard cams main shaft, base is fixed with multiple back-up block from left to right successively, the top of described back-up block is equipped with semicircle groove, described multiple semicircle groove is coaxial, the base of the left and right sides of each back-up block is equipped with calibrated bolck, shape and the position of described semicircle groove and cylinder cap camshaft hole are corresponding, the position of described calibrated bolck is corresponding with the position of valve lifter on engine, vertical distance between the bottom land of described semicircle groove and calibrated bolck top equals the gauged distance between camshaft holes on engine cylinder head bottom margin to valve lifter top, standard cams main shaft is placed in semicircle groove, and the standard cams axle directly over calibrated bolck and semicircle groove is provided with perforation, and in perforation, be provided with the first displacement transducer, described first displacement sensor probe stretches out below standard cams main shaft,
Described second measuring mechanism comprises workbench, standard cams axle, workbench is fixed with two V-blocks for supporting standard cams axle, standard cams axial compression gripping members, workbench is fixed with the measurement mechanism of the difference of base radius for measuring cam and cam main shaft radius, described measurement mechanism comprises base plate, base plate slidably connects slide block, described slide block is connected with cylinder, base plate is provided with the limited block for limiting slide block normal place, slide block is fixed with at least two second displacement sensors successively along standard cams axle axis direction, the telescopic direction of described second displacement sensor probe and standard cams axle intersect vertical axis, one of them second displacement sensor probe is corresponding with the position of the main shaft of standard cams axle, all the other second displacement sensor probes are corresponding with the base circle position of standard cams axle overhead cam respectively, described first displacement transducer and second displacement sensor are tangent displacement sensor.
2. valve clearance adjustment pad apolegamy measuring instrument according to claim 1, it is characterized in that, the slide block of measurement mechanism is fixed with three second displacement sensors successively along the axis direction of standard cams axle, be positioned at the second middle displacement sensor probe corresponding with the main spindle's of standard cams axle, the second displacement sensor probe being positioned at both sides is corresponding with the base circle position of two adjacent cams on standard cams axle respectively.
3. valve clearance adjustment pad apolegamy measuring instrument according to claim 2, it is characterized in that, workbench is fixed with four measurement mechanisms, second displacement sensor probe being positioned at centre of described four measurement mechanisms is all corresponding with the position of the main shaft of standard cams axle, described four measurement mechanisms are respectively the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism, and second displacement sensor probe being positioned at both sides of described first measurement mechanism is corresponding with two base circle position towards the cam in standard cams axle front respectively; Second displacement sensor probe being positioned at both sides of described second measurement mechanism is corresponding with two base circle position towards the cam at standard cams axle rear respectively; Second displacement sensor probe being positioned at both sides of described 3rd measurement mechanism is corresponding with two base circle position towards the cam below standard cams axle respectively; The base circle position of the cam of the second displacement sensor probe being positioned at both sides respectively with two above standard cams axle of described 4th measurement mechanism is corresponding.
4. use the adjustment of the valve clearance described in claim 3 pad apolegamy measuring instrument to carry out the matching method of pad, it is characterized in that, comprise the following steps:
S1: be placed in semicircle groove by standard cams main shaft, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S2: hand-held standard cams main shaft is placed in cylinder cap camshaft hole, will transmit after the displacement data of the first now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S3: standard cams axle to be placed on two V-blocks and with the cam that standard cams axial compression gripping members clamps standard cams axle left end, standard cams axle and two V-blocks to be compressed, when the slide block of the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism is slided into corresponding limited block by control cylinder action, the basic circle of each cam on standard cams axle is measured, will transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S4: camshaft to be measured to be placed on two V-blocks and with the cam that standard cams axial compression gripping members clamps camshaft left end to be measured, camshaft to be measured and two V-blocks to be compressed, when the slide block of the first measurement mechanism, the second measurement mechanism, the 3rd measurement mechanism, the 4th measurement mechanism is slided into corresponding limited block by control cylinder action, the basic circle of each cam on camshaft to be measured is measured, will transmit after the displacement data of the second now all displacement sensors from left to right number consecutively and be stored in industrial computer stand-by;
S5: the data that the first displacement transducer is measured by industrial computer in step s 2 and the data that the first displacement transducer is measured in step sl carry out doing difference, calculate the site error of the site error of valve lifter and calibrated bolck, cylinder cap camshaft hole and semicircle groove, then calculate the actual range A between cylinder cap camshaft hole bottom margin to valve lifter top according to the vertical distance between the bottom land of semicircle groove and calibrated bolck top;
The data that second displacement sensor is measured by industrial computer in step s 4 which and the data that second displacement sensor is measured in step s3 carry out doing difference, calculate the site error of the site error of main shaft with the main shaft of standard cams axle of camshaft to be measured, camshaft overhead cam basic circle to be measured and corresponding cam base circle on standard cams axle, then calculate the actual difference B of the base radius of each cam on camshaft to be measured and the difference of camshaft main shaft radius to be measured according to the standard value of the base radius of each cam on standard cams axle and the difference of standard cams axle main shaft radius;
Last industrial computer calculates the one-tenth-value thickness 1/10 of required pad on each valve lifter according to the computing formula of actual range A, actual difference B, spacer thickness d, the computing formula of described spacer thickness d is: the error that spacer thickness d=actual range A-actual difference B-standard valve gap width C+ experiential modification value D, experiential modification value D are presented as camshaft oil film thickness, gap between valve lifter and pad is introduced.
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| CN108534718A (en) * | 2018-07-03 | 2018-09-14 | 三门峡中原量仪股份有限公司 | A kind of axis parallel degree detection device of eccentric shaft |
| CN109209546A (en) * | 2018-09-30 | 2019-01-15 | 东风汽车集团有限公司 | The slack adjuster and adjusting method of continuous variable valve lift mechanism |
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| CN107830827A (en) * | 2017-10-27 | 2018-03-23 | 芜湖通和汽车管路系统股份有限公司 | Air-conditioner pipe raft core installs level detecting apparatus and its installation position detecting method |
| CN108507513A (en) * | 2018-06-28 | 2018-09-07 | 三门峡中原量仪股份有限公司 | A kind of piston ball pad matching device quickly matched |
| CN108507513B (en) * | 2018-06-28 | 2023-08-29 | 三门峡中原量仪股份有限公司 | Device for quickly selecting and matching piston ball pad |
| CN108534718A (en) * | 2018-07-03 | 2018-09-14 | 三门峡中原量仪股份有限公司 | A kind of axis parallel degree detection device of eccentric shaft |
| CN108534718B (en) * | 2018-07-03 | 2023-08-29 | 三门峡中原量仪股份有限公司 | Axis parallelism detection device of eccentric shaft |
| CN109209546A (en) * | 2018-09-30 | 2019-01-15 | 东风汽车集团有限公司 | The slack adjuster and adjusting method of continuous variable valve lift mechanism |
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| CN105371801B (en) | 2017-09-26 |
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