CN102607433B - Multi-point detection device for thickness of bearing bush - Google Patents
Multi-point detection device for thickness of bearing bush Download PDFInfo
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- CN102607433B CN102607433B CN201210045894.7A CN201210045894A CN102607433B CN 102607433 B CN102607433 B CN 102607433B CN 201210045894 A CN201210045894 A CN 201210045894A CN 102607433 B CN102607433 B CN 102607433B
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Abstract
The invention relates to a multi-point detection device for thickness of a bearing bush, which comprises a mechanical supporting mechanism, a bearing bush positioning and clamping mechanism, a measuring mechanism and a rotating and adjusting mechanism. The measuring principle accords with the Abbe principle, and materials are manually loaded and unloaded by employing a high-precision grating sensor, an inductance type sensor or a laser sensor; air pressure serves as a clamping driving force, a detection point is set to completely accord with the national standards, and the detection requirements of the bearing bush with different diameters and different thicknesses can be met. The multi-point detection device for the thickness of the bearing bush has the advantages that the device is small in volume, low in cost and high in detection precision and is not affected by human factors and errors of the end face of the bearing bush on the verticality of the axis, the detection can be strictly performed according to the national standards, the detection data can be recorded and traced back, the bearing bush is not required to manually turned, the detection efficiency is high, an inner surface of the bearing bush is not scratched during detection, etc. According to the multi-point detection device for the thickness of the bearing bush, the defects existing in the existing technology and device for detecting the thickness of the bearing bush are overcome, and the application prospect is wide.
Description
Affiliated technical field
The invention belongs to half bearing thickness detection field, especially relates to half bearing thickness multipoint detection device.
Background technology
Bearing shell is one of part that automobile and internal combustion engine industry volume of production and marketing are large, manufacturing accuracy is had relatively high expectations.Whether qualified performance and the life-span that has a strong impact on matched host machine of its thickness.Therefore, GB/T3162-1991 having relatively high expectations to half bearing thickness tolerance.For ensureing the bearing shell radial play in when work, reducing the high request to manufacture process and reduce production costs, the Divide into groups interchange assembling methods that adopt more, carry out the processing of half bearing thickness and the diameter of axle with the accuracy requirement of less expensive, carry out again precision measurement and sorting, according to measurement result, bearing shell and axle are divided into groups to assemble by sorting size.Therefore, half bearing thickness generally needs the requirement of full inspection guarantee Divide into groups interchange assembling.To the detection of half bearing thickness, GB/T18330-2001 regulation can adopt bayonet point or line survey method to carry out.While adopting bayonet point to detect, according to the difference of bearing shell external diameter, be on 1～3 axial cross section of bearing shell and be distributed on 0 °, ± 32.5 ° and ± 65 ° 6 or 10 and carry out.At present, the instrument of domestic detection half bearing thickness mainly contains screw micrometer, manual appliance special for detecting and Shaft tilt sickness detecting instrument.Although it is with low cost to detect half bearing thickness with screw micrometer, efficiency is low, and accuracy of detection is affected by human factors greatly, and the record that detects data need manually carry out; Manually appliance special for detecting, taking the zero-bit gauge head that is positioned at bearing shell inner side as measuring basis, taking bearing shell end face as positioning datum, manually clamps bearing shell, by clock gauge display measurement result.The position of its shortcoming is that human factor impact is large, bearing shell end face can have a strong impact on thickness to the verticality of its axis measuring accuracy, measurement point can not be strictly by the angle of national Specification carry out, bearing shell can scratch its inside surface with the collision of clock gauge gauge outfit, rotation axis watt-hour while putting into, need manual turn over watt etc.; " the mechanical system device of the automatic battery checker of half bearing thickness " that patent of invention ZL03142253.5 announces belongs to Shaft tilt sickness detecting instrument.It adopts high precision grating displacement sensor, has that accuracy of detection is high, an automatic charging, detection, automatic sorting and automatically record the functions such as measured value automatically.It is multiple functional, but expensive, and can only detect the thickness on two axial cross sections in 0 ° of direction of bearing shell.These all have a strong impact on applying of its scale.The half bearing thickness pick-up unit that industry is badly in need of that a kind of accuracy of detection is high, efficiency is high, reasonable price, measuring point comply with the national standard requirements completely.
Summary of the invention
The object of the present invention is to provide a kind of half bearing thickness multipoint detection device that can better meet Production requirement, realize high precision to half bearing thickness, low cost, the detection that complies with the national standard requirements completely.It comprises mechanical support mechanism, bearing shell positioning and clamping mechanism, measuring mechanism, rotation and adjusting mechanism four parts.
Described mechanical support mechanism is made up of riser 41, leveling board 34, dividing plate 53, installation of sensors plate 17, the 8th screw the 36, the 12 screw the 54, the 15 screw 67, the 3rd pin 55.Riser 41 connects firmly by the 15 screw 67 with leveling board 34.Riser 41 connects firmly by the 8th screw 36 with dividing plate 53.Leveling board 34 connects firmly by the 12 screw 54 and the 3rd pin 55 with installation of sensors plate 17.
Described bearing shell positioning and clamping mechanism is by zero-bit gauge head 13, zero-bit gauge head mounting rod 28, orienting lug 42, float plate 30, V-block mounting blocks 15, V-block 16, the first guide pin bushing 18, guide rod 19, cylinder push pedal 23, cylinder 57, the first nut 20, the 3rd nut 59, the second nut 39, the first spring washer 21, the second spring washer 68, the 3rd screw 14, the 6th screw 27, the 9th screw 48, the 11 screw 51, the 13 screw 56, the 14 screw 58, the 3rd spring 49 compositions such as grade, zero-bit gauge head 13 coordinates by pin-and-hole with zero-bit gauge head mounting rod 28, and fastening by the 3rd nut 59.Zero-bit gauge head mounting rod 28 coordinates with the pin-and-hole in orienting lug 42 and leveling board 34, connects, and lock by the second spring washer 68 and the second nut 39 by screw thread with orienting lug 42.Float plate 30 connects with rotor plate 33 by the 9th screw 48 and the 3rd spring 49.Orienting lug 42 connects firmly by the 11 screw 51 with leveling board 34.V-block 16 connects firmly by the 6th screw 27 with V-block mounting blocks 15.The 3rd screw 14 connects with the screw in V-block mounting blocks 15.Guide rod 19 connects by screw with V-block mounting blocks 15, and is slidably matched with the first guide pin bushing 18.The first guide pin bushing 18 and installation of sensors plate 17 close-fittings.Cylinder push pedal 23 connects firmly by the first nut 20 and the first spring washer 21 with guide rod 19, and connects firmly with cylinder 57 by the 14 screw 58.Cylinder 57 connects firmly with installation of sensors plate 17 by the 13 screw 56.
Described measuring mechanism is made up of survey sensor 22, control and display 26, the 4th screw 24 and the 5th screw 25.Survey sensor 22 is fastening with installation of sensors plate 17 by the 5th screw 25, the axis coaxle of its sounding rod center line and V-block mounting blocks 15 and V-block 16 interstitial holes, and by the centre of sphere of zero-bit gauge head 13.The 4th screw 24 connects by screw with installation of sensors plate 17.Control and display 26 are positioned on leveling board 34.
Described rotation and adjusting mechanism are by handwheel 4, latch 5, hand wheel shaft 52, first key 6, the second key 70, the first pin 3, the second pin 7, gear 37, up-down adjustment bar 47, spring collar 38, spacer pin 40, the second guide pin bushing 43, detect base plate 11, adjustable plate 2, lock-screw 29, the first spring 31, the second spring 46, the 4th spring 60, the 5th spring 64, orienting sleeve 44, guidepost 45, rotor plate 33, scraping wings 8, bearing shell baffle plate 9, the second screw 10, the 7th screw 32, the tenth screw 50, the 11 screw 51, handle 61, angle orientation bar 62, large screw 63, swivel nut 65 forms.Handwheel 4 connects by first key 6 with hand wheel shaft 52.Latch 5 inserts in hole corresponding on axial cross section pilot hole 69 on handwheel 4 end faces and riser 41.The second pin 7 inserts in the pin-and-hole of hand wheel shaft 52 ends.Gear 37 connects firmly with hand wheel shaft 52 by the second key 70, carries out axial limiting, and engage with the tooth bar on up-down adjustment bar 47 by two spring collars 38.Up-down adjustment bar 47 and the second guide pin bushing 43 are slidably matched, and connect firmly by the tenth screw 50 and detection base plate 11.The second guide pin bushing 43 is tight with in the hole of orienting lug 42 and leveling board 34.Orienting lug 42 connects firmly by the 11 screw 51 with leveling board 34.Spacer pin 40 inserts in the hole on up-down adjustment bar 47.The second spring 46 is detecting between base plate 11 and leveling board 34.Guidepost 45 connects firmly by screw thread with detecting base plate 11, inserts in the second spring 46, and is slidably matched with orienting sleeve 44.Orienting sleeve 44 is tight with in the hole of leveling board 34.Adjustable plate 2 is located by the first pin 3 with detecting base plate 11, and fastening by the first screw 1.Lock-screw 29 inserts in the pin-and-hole in rotor plate 33 by the 4th spring 60, and connects firmly by screw and adjustable plate 2.Scraping wings 8 connects with rotor plate 33 by the first spring 31 and the 7th screw 32.The second screw 10 connects firmly through elongated slot and scraping wings 8 on bearing shell baffle plate 9.Handle 61 passes through thread connection with angle orientation bar 62.Angle orientation bar 62 is slidably matched by the 5th spring 64 and the hole in large screw 63, and under the effect of the 5th spring 64, inserts in the angle orientation hole 35 on adjustable plate 2.Swivel nut 65 connects with large screw 63 by screw thread.Large screw 63 connects with rotor plate 33 by screw thread.
The invention has the advantages that:
1, compared with screw micrometer and manual appliance special for detecting, its accuracy of detection is not affected by human factors, bearing shell end face can not affect accuracy of detection to the verticality of its axis yet, and on different axial cross section, the detection of thickness does not need manual turn over watt, and therefore precision and efficiency of detecting is all higher.Meanwhile, when bearing shell rotates, can not scratch its inside surface;
2,, compared with Shaft tilt sickness detecting instrument, its volume is little, floor area is little, cost is low, the position of check point can strictly be undertaken by national Specification.
Based on the present situation of feature of the present invention and current domestic half bearing thickness detection, of the present invention having a extensive future, and can bring considerable economic and social benefit.
Brief description of the drawings
Fig. 1 is the structural representation of half bearing thickness multipoint detection device of the present invention.
Fig. 2 is the B-B partial sectional view of Fig. 1.
Fig. 3 is the A-A cut-open view in Fig. 2.
Fig. 4 is the top view of Fig. 1.
Fig. 5 is the A place partial enlarged drawing of Fig. 3.
Fig. 6 is that Fig. 1 rotor plate 33 rotates the schematic diagram of 32.5 °.
Fig. 7 is that Fig. 1 rotor plate 33 rotates the schematic diagram of 65 °.
Fig. 8 is that half bearing thickness multipoint detection device of the present invention detects each measurement point thickness schematic diagram on the middle axial cross section of bearing shell.
Fig. 9 is that half bearing thickness multipoint detection device of the present invention detects each measurement point thickness schematic diagram on bearing shell topmost axial cross section.
Figure 10 is that half bearing thickness multipoint detection device of the present invention detects major diameter half bearing thickness schematic diagram.
In figure, 1. the first screw, 2. adjustable plate, 3. the first pin, 4. handwheel, 5. latch, 6. first key, 7. the second pin, 8. scraping wings, 9. bearing shell baffle plate, 10. the second screw, 11. detect base plate, 12. tested bearing shells, 13. zero-bit gauge heads, 14. the 3rd screws, 15.V type piece mounting blocks, 16.V type piece, 17. installation of sensors plates, 18. first guide pin bushings, 19. guide rods, 20. first nuts, 21. first spring washers, 22. survey sensors, 23. cylinder push pedals, 24. the 4th screws, 25. the 5th screws, 26. control and display, 27. the 6th screws, 28. zero-bit gauge head mounting rods, 29. lock-screws, 30. float plate, 31. first springs, 32. the 7th screws, 33. rotor plates, 34. leveling boards, 35. angle orientation holes, 36. the 8th screws, 37. gears, 38. spring collars, 39. second nuts, 40. spacer pins, 41. risers, 42. orienting lugs, 43. second guide pin bushings, 44. orienting sleeves, 45. guideposts, 46. second springs, 47. up-down adjustment bars, 48. the 9th screws, 49. the 3rd springs, 50. the tenth screws, 51. the 11 screws, 52. hand wheel shafts, 53. dividing plates, 54. the 12 screws, 55. the 3rd pins, 56. the 13 screws, 57. cylinders, 58. the 14 screws, 59. the 3rd nuts, 60. the 4th springs, 61. handles, 62. angle orientation bars, 63. large screws, 64. the 5th springs, 65. swivel nuts, 66. dismounting holes, 67. the 15 screws, 68. second spring washers, 69. axial cross section pilot holes, 70. second keys, 71. handle holes, 72. large float plate.
Embodiment
In embodiment shown in Fig. 1, connect after source of the gas and power supply, V-block 16 leaves zero-bit gauge head 13 under the driving of cylinder 57, rollback is to upper, press the calibration knob (not shown) on control and display 26, the sounding rod of survey sensor 22 stretches out, through the hole in the middle of V-block mounting blocks 15 and V-block 16, with the sphere-contact of zero-bit gauge head 13.Measurement result is presented on control and display 26.Now, be set to zero by the indicating value of the zero-bit button (not shown) sensor on control and display 26, the sounding rod rollback of survey sensor 22, to initial position, completes calibration operation.This calibration operation needn't all carry out before every bearing shell detection, can be in every order of classes or grades at school, every day or longer time calibration once.When detection, an axial end of tested bearing shell 12 is put in and is detected on base plate 11, and undertaken spacing by scraping wings 8 and bearing shell baffle plate 9.Scraping wings 8 keeps tested bearing shell 12 inside surfaces not contact with zero-bit gauge head 13 under the effect of the first spring 31.Detect base plate 11 under the effect of the second spring 46 in upper, and spacing by spacer pin 40, meet standard-required with the measurement point that ensures survey sensor 22 apart from the distance of bearing shell lower surface.Press the test button (not shown) on control and display 26, cylinder 57 moves, drive V-block 16 to promote the outside surface of tested bearing shell 12, compress the first spring 31, and with constant pressure, the inside surface of tested bearing shell 12 is pressed on zero-bit gauge head 13.Now, the sounding rod of survey sensor 22 stretches out, and contacts with the outside surface of tested bearing shell 12.Now, the indicating value of survey sensor 22 is tested bearing shell 12 and is positioned at the one-tenth-value thickness 1/10 of 0 ° of measurement point in direction.Testing result also can by control and display 26 on data-interface (not shown) output to the outside memory device such as computer, USB flash disk, to carry out follow-up quality analysis and problem is reviewed.Then, the sounding rod of survey sensor 22 and the equal rollback of V-block 16 be to initial position, and tested bearing shell 12 also, under the first spring 31 effects, pushes away zero-bit gauge head 13 by scraping wings 8, and its inside surface is not scratched when ensureing that tested bearing shell 12 rotates.Now, the detection EO of a measurement point.For tested bearing shell 12 measurement point on other angle direction on this axial cross section, can pull up angle orientation bar 62 by handle 61, rotor plate 33 is rotated to predetermined angular together with float plate 30 and tested bearing shell 12, and angle orientation bar 62 is inserted in corresponding angle orientation hole 35, can repeat to detect, until the specifying measurement point in all angles direction has all detected on this axial cross section.For the detection of measurement point thickness on the different axial cross sections of bearing shell, can, by extracting latch 5, be rotated counterclockwise handwheel 4, make second axial cross section pilot hole 69 aim at hole corresponding on riser 41, and insert latch 5 it is fixed.Now, the center line that up-down adjustment bar 47 drives adjustable plate 2, tested bearing shell 12, float plate 30 and rotor plate 33 to drop to together survey sensor 22 sounding rods is the place of bearing shell width half apart from the distance of tested bearing shell 12 end faces, and zero-bit gauge head 13 and survey sensor 22 all keep motionless.So just can detect the each point on the axial middle section of tested bearing shell 12.Repeat above operation, rotation hand wheel 4, makes the 3rd axial cross section pilot hole 69 on its end face aim at hole corresponding on riser 41, inserts latch 5, can carry out thickness detection to the each measurement point on the 3rd axial cross section of tested bearing shell 12.So, all measurement points that are positioned in the different axial cross sections of bearing shell and different angles direction that specify in national standard all detect complete.
Detect basic theories according to Length Quantity, the sounding rod center line of survey sensor 22 whether the centre of sphere by zero-bit gauge head 13, whether overlap with the normal of tested bearing shell 12 outside surfaces, whether overlap with the vertical centering control section of V-block 16 all has a strong impact on the precision that half bearing thickness detects, simultaneously each part certainly exists foozle in process, and that device in use unavoidably there will be is loosening, wearing and tearing and collision etc.For this reason, three cover regulating devices in the embodiment shown in Fig. 1, have been designed to carry out corresponding adjusting in assembling and use procedure.First set regulating device is, contour for ensureing the sounding rod center line of survey sensor 22 and the centre of sphere of zero-bit gauge head 13, on the bottom of zero-bit gauge head mounting rod 28 and orienting lug 42, design thread connection, unclamp after the second nut 39, can regulate easily the centre of sphere height of zero-bit gauge head 13 by the handle hole 71 on zero-bit gauge head mounting rod 28, and lock by the second nut 39 and the second spring washer 68.The second cover regulating device is, for ensureing that the sounding rod center line of survey sensor 22 and the vertical centering control section of V-block 16 overlap, first unscrew the 6th screw 27, by being positioned at V-block 16 both sides, regulating the position, left and right of V-block 16 vertical centering control sections with two the 3rd screws 14 of V-block mounting blocks 15 thread connection.The 3rd cover regulating device is, for the sounding rod center line that makes survey sensor 22 overlaps with the normal of tested bearing shell 12 outside surfaces, first unscrew the 5th screw 25, be positioned at survey sensor 22 both sides, realize with four the 4th screws 24 of installation of sensors plate 17 thread connection by adjusting.
In embodiment shown in Fig. 1, in the time that V-block 16 is pressed in zero-bit gauge head 13 by tested bearing shell 12 under the effect of cylinder 57, the spatial attitude of tested bearing shell 12 is determined by the relative position of V-block 16 and zero-bit gauge head 13 completely.Because the diameter of three the 9th screw 48 via holes in float plate 30 is greater than the diameter of the 9th screw 48, be connected in float plate 30 on rotor plate 33 in the attitude of floating by the 9th screw 48 and the 3rd spring 49, the error of perpendicularity that so just can eliminate tested bearing shell 12 axial ends and its axis detects the adverse effect of bringing to thickness.
In embodiment shown in Fig. 1, detect for the multiple spot of major diameter half bearing thickness, can unclamp the first screw 1, extract the first pin 3, by adjustable plate 2 outwardly side shifting to correct position, then the first pin 3 is inserted to adjustable plate 2 and detects in pin-and-hole corresponding on base plate 11.For making float plate 30 not produce interference at rotation axis watt-hour and zero-bit gauge head mounting rod 28, replace float plate 30 by large float plate 72 again, pass through the relative position of the second screw 10 regulating shaft eaves tile plates 9 and scraping wings 8 to ensure accurately spacing (as shown in figure 10) of bearing shell simultaneously.
In embodiment shown in Fig. 1, dismounting hole 66 is to arrange for the easy accessibility of large screw 63.
Claims (1)
1. a half bearing thickness multipoint detection device, comprise mechanical support mechanism, bearing shell positioning and clamping mechanism, measuring mechanism, rotate and adjusting mechanism four parts, it is characterized in that: mechanical support mechanism is by riser (41), leveling board (34), dividing plate (53), installation of sensors plate (17), the 8th screw (36), the 12 screw (54), the 15 screw (67), the 3rd pin (55) composition, riser (41) connects firmly by the 15 screw (67) with leveling board (34), riser (41) connects firmly by the 8th screw (36) with dividing plate (53), leveling board (34) connects firmly by the 12 screw (54) and the 3rd pin (55) with installation of sensors plate (17), bearing shell positioning and clamping mechanism is by zero-bit gauge head (13), zero-bit gauge head mounting rod (28), orienting lug (42), float plate (30), V-block mounting blocks (15), V-block (16), the first guide pin bushing (18), guide rod (19), cylinder push pedal (23), cylinder (57), the first nut (20), the 3rd nut (59), the second nut (39), the first spring washer (21), the second spring washer (68), the 3rd screw (14), the 6th screw (27), the 9th screw (48), the 11 screw (51), the 13 screw (56), the 14 screw (58), the 3rd spring (49) composition, zero-bit gauge head (13) coordinates by pin-and-hole with zero-bit gauge head mounting rod (28), and fastening by the 3rd nut (59), zero-bit gauge head mounting rod (28) coordinates with the pin-and-hole in orienting lug (42) and leveling board (34), connect with orienting lug (42) by screw thread, and by the second spring washer (68) and the second nut (39) locking, float plate (30) connects with rotor plate (33) by the 9th screw (48) and the 3rd spring (49), orienting lug (42) connects firmly by the 11 screw (51) with leveling board (34), V-block (16) connects firmly by the 6th screw (27) with V-block mounting blocks (15), the 3rd screw (14) connects with the screw in V-block mounting blocks (15), guide rod (19) connects by screw with V-block mounting blocks (15), and be slidably matched with the first guide pin bushing (18), the first guide pin bushing (18) and installation of sensors plate (17) close-fitting, cylinder push pedal (23) connects firmly by the first nut (20) and the first spring washer (21) with guide rod (19), and connect firmly by the 14 screw (58) and cylinder (57), cylinder (57) connects firmly by the 13 screw (56) and installation of sensors plate (17), measuring mechanism is made up of survey sensor (22), control and display (26), the 4th screw (24) and the 5th screw (25), survey sensor (22) is fastening by the 5th screw (25) and installation of sensors plate (17), its sounding rod is coaxial with the hole in the middle of V-block mounting blocks (15) and V-block (16), and by the centre of sphere of zero-bit gauge head (13), the 4th screw (24) connects by screw with installation of sensors plate (17), rotate with adjusting mechanism by handwheel (4), latch (5), hand wheel shaft (52), first key (6), the second key (70), the first pin (3), the second pin (7), gear (37), up-down adjustment bar (47), spring collar (38), spacer pin (40), the second guide pin bushing (43), detect base plate (11), adjustable plate (2), lock-screw (29), the first spring (31), the second spring (46), the 4th spring (60), the 5th spring (64), orienting sleeve (44), guidepost (45), rotor plate (33), scraping wings (8), bearing shell baffle plate (9), the second screw (10), the 7th screw (32), the tenth screw (50), handle (61), angle orientation bar (62), large screw (63), swivel nut (65) composition, handwheel (4) connects by first key (6) with hand wheel shaft (52), latch (5) inserts in first axial cross section pilot hole (69) and the upper corresponding hole of riser (41) on handwheel (4) end face, the second pin (7) inserts in the pin-and-hole of hand wheel shaft (52) end, gear (37) connects firmly by the second key (70) and hand wheel shaft (52), by two spring collars (38) axial limiting, and engage with the tooth bar on up-down adjustment bar (47), up-down adjustment bar (47) is slidably matched with the second guide pin bushing (43), and connect firmly by the tenth screw (50) and detection base plate (11), the second guide pin bushing (43) is tight with in the hole of orienting lug (42) and leveling board (34), spacer pin (40) inserts in the hole on up-down adjustment bar (47), the second spring (46) is positioned at and detects between base plate (11) and leveling board (34), guidepost (45) connects firmly by screw thread with detection base plate (11), insert in the second spring (46), and be slidably matched with orienting sleeve (44), orienting sleeve (44) is tight with in the hole of leveling board (34), adjustable plate (2) is located by the first pin (3) with detection base plate (11), and fastening by the first screw (1), lock-screw (29) inserts in the pin-and-hole in rotor plate (33) by the 4th spring (60), and connect firmly by screw and adjustable plate (2), scraping wings (8) connects with rotor plate (33) by the first spring (31) and the 7th screw (32), the second screw (10) connects firmly through elongated slot and scraping wings (8) on bearing shell baffle plate (9), handle (61) passes through thread connection with angle orientation bar (62), angle orientation bar (62) is slidably matched by the 5th spring (64) and the hole in large screw (63), and under the effect of the 5th spring (64), insert in the angle orientation hole (35) on adjustable plate (2), swivel nut (65) connects with large screw (63) by screw thread, large screw (63) connects with rotor plate (33) by screw thread.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045894.7A CN102607433B (en) | 2012-02-24 | 2012-02-24 | Multi-point detection device for thickness of bearing bush |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045894.7A CN102607433B (en) | 2012-02-24 | 2012-02-24 | Multi-point detection device for thickness of bearing bush |
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| CN102607433A CN102607433A (en) | 2012-07-25 |
| CN102607433B true CN102607433B (en) | 2014-11-26 |
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| CN201210045894.7A Expired - Fee Related CN102607433B (en) | 2012-02-24 | 2012-02-24 | Multi-point detection device for thickness of bearing bush |
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| CN102607433A (en) | 2012-07-25 |
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