AU2012307997B2 - Inner diameter micrometer - Google Patents

Inner diameter micrometer Download PDF

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Publication number
AU2012307997B2
AU2012307997B2 AU2012307997A AU2012307997A AU2012307997B2 AU 2012307997 B2 AU2012307997 B2 AU 2012307997B2 AU 2012307997 A AU2012307997 A AU 2012307997A AU 2012307997 A AU2012307997 A AU 2012307997A AU 2012307997 B2 AU2012307997 B2 AU 2012307997B2
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AU
Australia
Prior art keywords
measuring rod
bend measuring
transmission shaft
sleeve
diameter micrometer
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Ceased
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AU2012307997A
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AU2012307997A1 (en
Inventor
Shengqiang SUN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU BLUE KING MACHINE TOOL TECHNOLOGY Ltd
Original Assignee
Suzhou Blue King Machine Tool Tech Ltd
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Priority to CN201110286483.2 priority Critical
Priority to CN201110286483.2A priority patent/CN102927872B/en
Application filed by Suzhou Blue King Machine Tool Tech Ltd filed Critical Suzhou Blue King Machine Tool Tech Ltd
Priority to PCT/CN2012/001268 priority patent/WO2013037190A1/en
Publication of AU2012307997A1 publication Critical patent/AU2012307997A1/en
Application granted granted Critical
Publication of AU2012307997B2 publication Critical patent/AU2012307997B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Instruments as specified in the subgroups and characterised by the use of mechanical measuring means
    • G01B3/18Micrometers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/08Measuring arrangements characterised by the use of mechanical means for measuring diameters
    • G01B5/12Measuring arrangements characterised by the use of mechanical means for measuring diameters internal diameters

Abstract

An inner diameter micrometer, comprises a fixing bend measuring rod (12), a moving bend measuring rod (15), a transmission shaft (28), a supporting sleeve (2), a differential sleeve (4), an adjusting knob (7), a ruler body (9), and a digital display device (52) specially used for the inner diameter micrometer. The fixing bend measuring rod (12) and the moving bend measuring rod (15) are provided with a fixing bend measuring head (13) and a moving bend measuring head (14) respectively, the fixing bend measuring rod (12) is connected with the ruler body (9), the moving bend measuring rod (15) is connected with the supporting sleeve (2) and the transmission shaft (28), the transmission shaft (28) is connected with the differential sleeve (4) and the adjusting knob (7), the supporting sleeve (2) is connected with the ruler body (9) and the differential sleeve (4), the ruler body (9) of the digital inner diameter micrometer is provided with a digital display device (52). Limitations and shortcomings in measuring process using present measuring tools are effectively solved by the inner diameter micrometer, which meets the requirements for accuracy and convenience in measuring process.

Description

INNER DIAMETER MICROMETER FIELD OF THE INVENTION [0001] The present invention relates to an inner diameter micrometer, more particularly to an inner diameter micrometer capable of measuring the inner diameter of work-piece quickly and conveniently. BACKGROUND OF THE INVENTION [0002] At present, precise measuring for the inner diameter of a work-piece is performed mainly by an outer diameter micrometer cooperating with an inner diameter gauge, or a three-point inner diameter micrometer and a straight-bar inner diameter micrometer. However, these tools are either inconvenient to use or restricted by the diameter of aperture during measuring process, and all have some limitations and shortcomings on measuring methods and ranges. In relation to an inner diameter measuring process, there are not any measuring tools nor any measuring methods capable of conveniently, quickly, easily and accurately measuring the inner diameter, just as what the outer diameter micrometer does. These tools often cannot achieve a convenient measurement and an accurate measurement all at once. Three patents, multipurpose inner diameter micrometer (ZL200920174644.7) and multipurpose digital display inner diameter micrometer (201110071791. 3, 201120080275. 2) 1 all make effect at the measuring accuracy by their transmission model and design of component structure. [0002a] Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present disclosure as it existed before the priority date of each claim of this application. [0002b] Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps. SUMMARY OF THE INVENTION [0003] In order to overcome the shortcomings of the existing inner diameter micrometers, the present invention aims to provide a new inner diameter micrometer, making a key breakthrough in transmission structure of the component and in the principle of measurement, significantly reducing and changing the transmission chain and transmission model inside the transmission mechanism, and thereby effectively overcoming the defect of inconvenience in inner diameter measurement and meeting 2 the requirement of conveniently and accurately measuring the inner diameter. [0004] In order to solve the technical problems, the present invention provides technical solutions as follows: The inner diameter micrometer comprises a fixed bend measuring rod, a moveable bend measuring rod, a transmission shaft, a supporting sleeve, a differential sleeve and an adjusting knob, a ruler body and a digital display device dedicated for digitally displaying the inner diameter micrometer, characterized in that: the fixed bend measuring head (13) and the moveable bend measuring head (14) are arranged respectively on the fixed bend measuring rod (12) and on the moveable bend measuring rod (15), the fixed bend measuring rod (12) is connected with the ruler body (9), the moveable bend measuring rod (15) is connected with the supporting sleeve (2) and the transmission shaft (28), the transmission shaft (28) is connected with the differential sleeve (4) and the adjusting knob (7), the supporting sleeve (2) is connected with the ruler body (9) and the differential sleeve (4), wherein the differential sleeve (4) is driveable to rotate the transmission shaft (28), the movement of the moveable bend measuring rod (15) is led by the transmission shaft (28), the adjusting knob (7) arranged on the transmission shaft (28) also drives the transmission shaft (28) and forces the moveable bend measuring rod (15) to move axially during the measurement, wherein the transmission shaft (28) is arranged with a 3 mounting hole for ratchet rod (41), in which a spring (29) for controlling the transmission shaft measurement and a ratchet rod (30) are mounted, and the adjusting knob (7) is arranged with an inner ratchet wheel (31) which is cooperatively used with the spring (29) and the ratchet rod (30) to control the twisting force of the adjusting knob (7), and a digital display device (52) is arranged on the ruler body (9) dedicated for digitally displaying the inner diameter micrometer. [0005] The fixed bend measuring rod (12) of the inner diameter micrometer is arranged with an engaging plane for the fixed bend measuring rod and the ruler body (37), a cylindrical engaging surface for the fixed bend measuring rod and ruler body (38) and a dowel pin (36); the moveable bend measuring rod (15) is arranged with a scale on moveable bend measuring rod (1), internal threads of moveable bend measuring rod (39), a plug (16), a straight surface of circular groove (33) and a spherical surface of circular groove (35); the transmission shaft (28) is arranged with a threaded rod (40), an oil sump (26) and a ball slot (27); the supporting sleeve (2) is arranged with an engaging plane for differential sleeve and supporting sleeve (17), a cylindrical engaging surface for differential sleeve and supporting sleeve (18), a cylindrical engaging surface for differential sleeve and transmission shaft (22), a screw hole for round-head positioning screw (42), a cylindrical engaging surface for supporting sleeve and ruler body (43) and a slot for supporting 4 sleeve (44); the differential sleeve (4) is arranged with an adjusting hole (5), annular knurl (6), scale of differential sleeve (47) and a positioning screw hole for differential sleeve (48); the adjusting knob (7) is arranged with annular knurl (6), a positioning screw hole for adjusting knob (49) and an adjusting knob threads fitting with round head screw (50); the round-head positioning screw (32) is arranged with a cylindrical surface of round-head positioning screw (45) and a spherical surface of round-head positioning screw (46); the inner diameter micrometer comprises a dedicated digital display inner diameter micrometer with the digital display device (52) and a verification frame (51) for verifying the measurement; material and process of the arc part of the fixed bend measuring head (13) and the moveable bend measuring head (14) of the inner diameter micrometer comprise the inlay of hard alloy. [0006] The present invention has advantages as follows: it reduces the transmission chains inside the inner diameter micrometer, effectively eliminates the error generated because of too many transmission chains and thereby meets the requirement of improving measurement accuracy of the inner diameter micrometer. The inner diameter micrometer provided by the present invention is able to directly measure the inner diameter of work-piece conveniently, quickly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS 5 [0007] Further details of the present invention will be described with reference to figures and embodiments. [0008] Fig. 1 is a front view of an inner diameter micrometer. [0009] Fig. 2 is a sectional view of an inner diameter micrometer. [0010] Fig. 3 is a sectional view of an adjusting knob of an inner diameter micrometer taken along section A-A. [0011] Fig. 4 is a sectional view of an inner diameter micrometer taken along section B-B. [0012] Fig. 5 is a sectional view of an inner diameter micrometer taken along section C-C. [0013] Fig. 6 is a schematic diagram of a fixed bend measuring rod. [0014] Fig. 7 is a schematic diagram of a moveable bend measuring rod. [0015] Fig. 8 is a schematic diagram of a transmission shaft. [0016] Fig. 9 is a schematic diagram of a supporting sleeve. [0017] Fig. 10 is a schematic diagram of a round head screw. [0018] Fig. 11 is a front view of a differential sleeve. [0019] Fig. 12 is a sectional view of a differential sleeve. [00201 Fig. 13 is a schematic diagram of an adjusting knob. [00211 Fig. 14 shows a verification frame; [0022] Fig. 15 shows a digital display inner diameter micrometer with a digital display device. 6 [0023] In Figs. 1-15, 1. scale of moveable bend measuring rod; 2. supporting sleeve; 3. datum line on scale of a differential sleeve; 4. differential sleeve; 5. adjusting hole; 6. annular knurl; 7. adjusting knob; 8. round head screw; 9. ruler body; 10. thermal baffle; 11. fastening screw for the thermal baffle; 12. fixed bend measuring rod; 13. fixed bend measuring head; 14. moveable bend measuring head; 15. moveable bend measuring rod; 16. plug; 17. engaging plane for differential sleeve and supporting sleeve; 18. cylindrical engaging surface for differential sleeve and supporting sleeve; 19. spring; 20. sunk screw for supporting sleeve; 21. ball; 22. cylindrical engaging surface for differential sleeve and transmission shaft; 23. sunk screw for adjusting knob; 24. spring; 25. ball; 26. oil sump; 27. ball slot; 28. transmission shaft; 29. spring; 30. ratchet rod; 31. inner ratchet wheel; 32. round-head positioning screw; 33. straight surface of circular groove; 34. slot for round-head positioning screw; 35. spherical surface of circular groove; 36. dowel pin; 37. engaging plane for fixed bend measuring rod and ruler body; 38. cylindrical engaging surface for fixed bend measuring rod and ruler body; 39. internal thread of moveable bend measuring rod; 40. threaded rod; 41. mounting hole for ratchet rod; 42. screw hole for round-head positioning screw; 43. cylindrical engaging surface for supporting sleeve and ruler body; 44. slot for supporting sleeve; 45. cylindrical surface of round-head positioning screw; 46. spherical surface of round-head positioning screw; 7 47. scale of differential sleeve; 48. positioning screw hole for differential sleeve; 49. positioning screw hole for adjusting knob; 50. adjusting knob threads fitting with round head screw; 51.verification frame; 52. digital display device. DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS [0024] In Figs. 1-15, main device of the inner diameter micrometer comprises: a fixed bend measuring rod, a movable bend measuring rod, a transmission shaft, a supporting sleeve, a differential sleeve and adjusting knob, a ruler body and a digital display device dedicated for digitally displaying the inner diameter micrometer, wherein the connection and transmission relationships between each other are as follows: [0025] Two measuring heads of the inner diameter micrometer are respectively a fixed bend measuring head (13) and a moveable bend measuring head (14), which are arranged respectively on a fixed bend measuring rod (12) and on a moveable bend measuring rod (15). The fixed bend measuring rod (12) is connected with the ruler body (9), the moveable bend measuring rod (15) is connected with the supporting sleeve (2) and the transmission shaft (28), the transmission shaft (28) is connected with the differential sleeve (4) and the adjusting knob (7), the supporting sleeve (2) is connected with the ruler body (9) and the differential sleeve (4). The fixed bend measuring rod (12) and the 8 supporting sleeve (2) are fixed by the ruler body (9), the differential sleeve (4) is supported by the supporting sleeve (2), the differential sleeve (4) is driveable to rotate the transmission shaft (28), the movement of the moveable bend measuring rod (15) is led by the transmission shaft (28), the adjusting knob (7) arranged on the transmission shaft (28) also drives the transmission shaft (28) and forces the moveable bend measuring rod (15) to move axially during the measurement. [0026] The features, structures and embodiments of the inner diameter micrometer of the present invention are described as follows: [0027] Two measuring heads of the inner diameter micrometer are respectively a fixed bend measuring head (13) and a moveable bend measuring head (14). When a work-piece need to be measured for inner diameter, before measuring, the fixed bend measuring head (13) and the moveable bend measuring head (14) are put inside of the verification frame (51) at the position d, then the adjusting knob (7) is rotated in a counterclockwise direction to allow the moveable bend measuring head (14) to contact with the position d inside of the verification frame (51) and the ratchet to make a clicking sound, then the zero line of the scale of differential sleeve (47) on the differential sleeve (4) (as shown in Fig. 11) is aligned with the datum line on scale of a differential sleeve (3) on the supporting sleeve (2), and the zero line may be adjusted by the adjusting hole (5) on the differential sleeve (4) if it is not aligned with the datum 9 line on scale of a differential sleeve (3). After the adjustment, a second calibration is performed by the differential sleeve (4) and the adjusting knob (7), and the calibration should continue to be performed until the zero line on the differential sleeve (4) remains alignment to the datum line on scale of a differential sleeve (3) while a clicking sound of slipping of the mechanical transmission is made by the spring (29), the ratchet rod (30) and the inner ratchet wheel (31) inside the adjusting knob (7) (the structure is shown in Fig. 3). [0028] The initial scale value (e.g. 25mm) of the scale on the moveable bend measuring rod (1) is predesigned at a visible position, where is convenient to read, on the ruler body (9). In order to allow the two measuring heads of the inner diameter micrometer to be put within the verification frame (51), line of the initial scale value is at least 0.5mm-1mm away from the ruler body before the calibration. Precise calibration value d on the inside of the verification frame (51) fits with the initial scale value of the inner diameter micrometer so as to insure the precision of the calibration value. [00291 When actually measuring inner diameter, the differential sleeve (4) and the adjusting knob (7) are used cooperatively. The differential sleeve (4) is used for moving fast, i.e. it is used for moving the measuring heads to or away from the measuring surface fast, and the adjusting knob (7) is used for controlling the twisting force of the user, i.e. the adjusting 10 knob (7) is used for controlling the measuring force of the user when the measuring heads has get to the measuring surface already or almost get to the final measuring value, so as to avoid the measuring error resulting from the force is too large. [0030] Two bent measuring rods of the inner diameter micrometer are respectively a fixed bend measuring rod (12) and a moveable bend measuring rod (15), and an engaging plane for fixed bend measuring rod and ruler body (37) and a cylindrical engaging surface for fixed bend measuring rod and ruler body (38) are arranged on the fixed bend measuring rod (12), as shown in Fig.6, so as to ensure the positioning accuracy of the fixed bend measuring rod (12), and meanwhile a dowel pin (36) is arranged on its side for preventing it from any movement (as shown in Fig.5), so as to ensure the positioning accuracy and stabilization of the fixed bend measuring rod (12). Scale of moveable bend measuring rod (1) showing the integral value 0.5mm and 1mm of the size of work-piece to be measured is arranged on the moveable bend measuring rod (15), for example if the value of the inner diameter to be measured is 30.28 mm or 30.58 mm, the scale of moveable bend measuring rod (1) will show 30 mm or 30.50 mm, and the rest fractional part 0.28mm or 0.08mm will be shown by the alignment of the scale of differential sleeve (47) and the datum line on scale of a differential sleeve (3). The internal threads of moveable bend measuring rod (39) precisely match with the 11 threaded rod (40) on the transmission shaft (28) and serve for the transmission of twisting force for measuring the inner diameter and for the value display. Outer diameter of the plug (16) and major diameter of the internal threads of moveable bent measuring rod (39) are same, and they fit with each other for precise transition and serve for protecting after processing fabrication hole of the internal threads of moveable bend measuring rod (39) (as shown in Fig.7). A straight surface of circular groove (33) and a spherical surface of circular groove (35) are arranged on the moveable bend measuring rod (15) to cooperate with a cylindrical surface of round-head positioning screw (45) and a spherical surface of round-head positioning screw (46) on the round-head positioning screw (32), and limit the axial movement and positioning of the moveable bend measuring rod (15), wherein a precise sliding-cooperative relationship is formed between the moveable bend measuring rod (15) and the supporting sleeve (2). [0031] The threaded rod (40) arranged on the transmission shaft (28) of the inner diameter micrometer is precisely fit with the internal threads of moveable bend measuring rod (39), serving for the transmission of the inner diameter measurement and for the value display (as shown in Fig.2). A cylindrical engaging surface for differential sleeve and transmission shaft is arranged on the transmission shaft (28) to ensure the cooperative transmission relationship between the transmission shaft (28) and the 12 differential sleeve (4). A spring (29) for controlling the transmission shaft measurement and a ratchet rod (30) are mounted in the mounting hole for ratchet rod (41) (as shown in Fig. 8), which are used cooperatively with a inner ratchet wheel (31) in the adjusting knob (7) (as shown in Fig. 3). An oil sump (26) is used for storing lubricating oil, so as to lubricate and reduce the friction between the ratchet rod (30) and the inner ratchet wheel (31). A ball slot (27) is cooperatively used with a sunk screw for adjusting knob (23), a spring (24) and a ball (25) to limit the axial position of the adjusting knob (7) on the transmission shaft (28). [0032] The supporting sleeve (2) (as shown in Figs.9, 2) of the inner diameter micrometer is transitively fitted, connected and fixed with the ruler body (9) by the cylindrical engaging surface for supporting sleeve and ruler body (43). An engaging plane for differential sleeve and supporting sleeve (17) and a cylindrical engaging surface for differential sleeve and supporting sleeve (18) on the supporting sleeve (2) serve for cooperatively positioning function of the differential sleeve (4). A slot for supporting sleeve (44) is cooperatively used with a spring (19), a sunk screw for supporting sleeve (20) and a ball (21) to limit the axial position of the differential sleeve (4) on the supporting sleeve (2). A screw hole for round-head positioning screw (42) is used for mounting the round-head positioning screw (32). [0033] The annular knurl (6) on the differential sleeve (4) of the inner 13 diameter micrometer is used for increasing the friction of fingers during measuring. A positioning screw hole for differential sleeve (48) (as shown in Fig. 12) is used for mounting the spring (19), the sunk screw for supporting sleeve (20) and the ball (21). The differential sleeve (4) is used for the twisting force transmission of the transmission shaft (28) and for the display of the size of inner diameter on the supporting sleeve (2). [0034] The adjusting knob (7) of the inner diameter micrometer is arranged with the annular knurl (6) to increase the friction for rotating the knob by finger during measuring. The inner ratchet wheel (31) is cooperatively used with the spring (29) on the transmission shaft (28) and with the ratchet rod (30) to control the twisting force of the adjusting knob (7) (as shown in Fig. 3). The adjusting knob (7) drives the transmission shaft (28) and the measuring head on the moveable bend measuring rod (15) to get close to the surface to be measured when it is rotated counterclockwise by the user. When measuring work-piece by the adjusting knob (7), slip occurs after the inner ratchet wheel (31) and the ratchet rod (30) are rotated in a certain twisting force, which indicates that the measure force now have meet the requirement of measurement and the measured value of the inner diameter can be read. After the value is read, the user may rotate the adjusting knob (7) in a clockwise direction, and the ratchet rod (30) will release the stuck inner ratchet wheel (31) under the action of the spring (29), and thereby making the adjusting 14 knob (7) to drive the moveable bend measuring head (14) on the transmission shaft (28) away from the surface to be measured and finish the whole measuring process. The sunk screw for adjusting knob (23), the spring (24) and the ball (25) are mounted in the positioning screw hole for adjusting knob (49) on the adjusting knob (7) for positioning the axial position of the adjusting knob (7) on the transmission shaft (28). The adjusting knob threads fitting with round head screw (50) (as shown in Figs. 13, 1) fit with the round head screw (8), serving for dust prevention and artistic effect for the inner diameter micrometer. [0035] The cylindrical surface of round-head positioning screw (45) and the spherical surface of round-head positioning screw (46) (as shown in Figs. 10, 4) on the round-head positioning screw (32) of the inner diameter micrometer are cooperatively used with the straight surface of circular groove (33) and the spherical surface of circular groove (35) on the moveable bend measuring rod (15) to control the accuracy of axial movement and the position of radial positioning of the moveable bend measuring rod (15). And the slot for round-head positioning screw (34) is a processed slot. [00361 A digital display device (52) (as shown in Fig. 15) of the inner diameter micrometer is dedicated for the digital display inner diameter micrometer of the inner diameter micrometer, and the digital display technology of the digital display device and the transmission mechanism 15 for the inner diameter micrometer is common knowledge and therefore will not be further described. [0037] The verification frame (51) of the inner diameter micrometer is an ancillary attachment of the inner diameter micrometer, which is configured with a precise calibration value d on the inside and mainly used for verifying the initial datum of the inner diameter micrometer. The verification method is common knowledge. [00381 The thermal baffle (10) on the ruler body (9) of the inner diameter micrometer is fastened by the fastening screw for the thermal baffle (11), which is mainly used for accuracy measurement. [0039] Comparing the inner diameter micrometer with traditional tools and methods for measuring the inner diameter, its design is ingenious, simple, reasonable and precise. It measures the inner diameter of work-piece accurately and effectively, helps the user to save measuring time and improves the machining accuracy for inner diameter. It is a new product in the field of inner diameter measurement and will positively push for progress of machining technology. 16

Claims (10)

1. An inner diameter micrometer comprising: a fixed bend measuring rod, a moveable bend measuring rod, a transmission shaft, a supporting sleeve, a differential sleeve and an adjusting knob, a ruler body and a digital display device dedicated for digitally displaying the inner diameter micrometer, characterized in that: the fixed bend measuring head (13) and the moveable bend measuring head (14) are arranged respectively on the fixed bend measuring rod (12) and on the moveable bend measuring rod (15), the fixed bend measuring rod (12) is connected with the ruler body (9), the moveable bend measuring rod (15) is connected with the supporting sleeve (2) and the transmission shaft (28), the transmission shaft (28) is connected with the differential sleeve (4) and the adjusting knob (7), the supporting sleeve (2) is connected with the ruler body (9) and the differential sleeve (4), wherein the differential sleeve (4) is driveable to rotate the transmission shaft (28), the movement of the moveable bend measuring rod (15) is led by the transmission shaft (28), the adjusting knob (7) arranged on the transmission shaft (28) also drives the transmission shaft (28) and forces the moveable bend measuring rod (15) to move axially during the measurement, wherein the transmission shaft (28) is arranged with a mounting hole for ratchet rod (41), in which a spring (29) for controlling the transmission shaft measurement and a ratchet rod (30) are 17 mounted, and the adjusting knob (7) is arranged with an inner ratchet wheel (31) which is cooperatively used with the spring (29) and the ratchet rod (30) to control the twisting force of the adjusting knob (7), and a digital display device (52) is arranged on the ruler body (9) dedicated for digitally displaying the inner diameter micrometer.
2. The inner diameter micrometer according to claim 1, characterized in that: the fixed bend measuring rod (12) is arranged with an engaging plane for fixed bend measuring rod and ruler body (37), a cylindrical engaging surface for fixed bend measuring rod and ruler body (38) and a dowel pin (36).
3. The inner diameter micrometer according to claim 1, characterized in that: the moveable bend measuring rod (15) is arranged with a scale on the moveable bend measuring rod (1), internal threads of moveable bend measuring rod (39), a plug (16), a straight surface of circular groove (33) and a spherical surface of circular groove (35).
4. The inner diameter micrometer according to claim 1, characterized in that: the transmission shaft (28) is arranged with a threaded rod (40), an oil sump (26) and a ball slot (27).
5. The inner diameter micrometer according to claim 1, characterized in that: the supporting sleeve (2) is arranged with an engaging plane for differential sleeve and supporting sleeve (17), a cylindrical engaging surface for differential sleeve and supporting sleeve (18), a cylindrical 18 engaging surface for differential sleeve and transmission shaft (22), a screw hole for round-head positioning screw (42), a cylindrical engaging surface for supporting sleeve and ruler body (43) and a slot for supporting sleeve (44).
6. The inner diameter micrometer according to claim 1, characterized in that: the differential sleeve (4) is arranged with an adjusting hole (5), annular knurl (6), scale of differential sleeve (47) and a positioning screw hole for differential sleeve (48).
7. The inner diameter micrometer according to claim 1, characterized in that: the adjusting knob (7) is arranged with annular knurl (6), a positioning screw hole for adjusting knob (49) and an adjusting knob threads fitting with round head screw (50).
8. The inner diameter micrometer according to claim 1, characterized in that: the round-head positioning screw (32) is arranged with a cylindrical surface of round-head positioning screw (45) and a spherical surface of round-head positioning screw (46).
9. The inner diameter micrometer according to claim 1, characterized in that: it comprises a dedicated digital display inner diameter micrometer with the digital display device (52) and a verification frame (51) for verifying the measurement.
10. The inner diameter micrometer according to claim 1, characterized in that: material and process of the arc part of the fixed bend 19 measuring head (13) and the moveable bend measuring head (14) comprise the inlay of hard alloy. 20
AU2012307997A 2011-08-08 2012-09-17 Inner diameter micrometer Ceased AU2012307997B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201110286483.2 2011-09-16
CN201110286483.2A CN102927872B (en) 2011-08-08 2011-09-16 Inside micrometer
PCT/CN2012/001268 WO2013037190A1 (en) 2011-09-16 2012-09-17 Inner diameter micrometer

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AU2012307997A1 AU2012307997A1 (en) 2014-04-10
AU2012307997B2 true AU2012307997B2 (en) 2015-07-23

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Publication number Priority date Publication date Assignee Title
CN104457476A (en) * 2014-12-25 2015-03-25 苏州莱测检测科技有限公司 Multifunctional micrometer

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CN1229909A (en) * 1998-03-24 1999-09-29 赵志强 Directly-moving grid digital displaying micrometer
CN201748874U (en) * 2009-09-09 2011-02-16 孙生强 Multifunctional inside micrometer
CN201527241U (en) * 2009-11-03 2010-07-14 上海君丰科贸有限公司 High-accuracy electronic digital-display internal measuring micrometer
CN202074898U (en) * 2011-03-24 2011-12-14 苏州萃智新技术开发有限公司 Multi-purpose digimatic internal micrometer
CN202188801U (en) * 2011-08-08 2012-04-11 孙生强 Female thread micrometer
CN102927872B (en) * 2011-08-08 2017-03-08 孙生强 Inside micrometer
CN202420336U (en) * 2011-10-12 2012-09-05 潍坊科技学院 Digital micrometer for internal diameter detection

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CN102109307A (en) * 2011-03-24 2011-06-29 苏州萃智新技术开发有限公司 Multipurpose digital display internal micrometer

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AU2012307997A1 (en) 2014-04-10
WO2013037190A1 (en) 2013-03-21
GB201406407D0 (en) 2014-05-21

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