CN111912321A - Inner hole coaxiality gauge - Google Patents
Inner hole coaxiality gauge Download PDFInfo
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- CN111912321A CN111912321A CN202010960946.8A CN202010960946A CN111912321A CN 111912321 A CN111912321 A CN 111912321A CN 202010960946 A CN202010960946 A CN 202010960946A CN 111912321 A CN111912321 A CN 111912321A
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- chuck
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- shell
- guide groove
- hole
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention belongs to the field of machining, and particularly relates to an inner hole coaxiality gauge which comprises an inner diameter dial indicator and a large hole centering device, wherein the large hole centering device is sleeved on a shaft rod of the inner diameter dial indicator and can rotate around the shaft rod. During operation, the large hole centering device is placed into the large hole to be measured, the measuring head of the inside diameter dial indicator is placed into the small hole, the adjusting knob is rotated to drive the gear to rotate, and therefore the gear disc rotates. Until all the sliding ejector block assemblies are adjusted to just tightly push against the inner wall of the large hole, the central shaft of the checking fixture is coaxial with the central shaft of the large hole, and the change value can be read by rotating the inner diameter dial indicator, so that whether the coaxiality meets the requirement or not is judged.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to an inner hole coaxiality gauge.
Background
The mechanical transmission mechanism part can have certain requirements on the coaxiality of the inner hole, for example, the fork hole on the axle speed reducer shell, the coaxiality exceeds an error allowable value, the transmission is not flexible, accidents are easy to cause, and therefore the inspection on the coaxiality is very important.
The inner hole coaxiality can be measured by a three-coordinate measuring instrument under the common condition, but for the hole with smaller size and deeper hole diameter, the measurement of a common probe is difficult, a special probe is needed, and the three-coordinate measurement is time-consuming. At present, a coaxiality check rod is adopted more frequently, the checking efficiency is very high, only an inner hole needs to be inserted, the coaxiality check rod is qualified if the inner hole passes through the inner hole, and the coaxiality check rod is unqualified if the inner hole does not pass through the inner hole. However, the method has the defects that only approximate inspection can be carried out, qualified products cannot be guaranteed to be qualified, and unqualified products cannot be guaranteed to be unqualified.
Disclosure of Invention
According to the defects of the prior art, the invention provides the inner hole coaxiality detection tool which can read out a coaxiality deviation value and is accurate and reliable in measurement.
The invention discloses an inner hole coaxiality gauge which comprises an inner diameter dial indicator and a large hole centering device, wherein the large hole centering device comprises a chuck A, a chuck B, a gear disc, a shell, a sliding top block assembly, a gear and an adjusting knob;
wherein the chuck A, the chuck B, the gear disc and the shell are coaxially arranged from bottom to top, and through holes are arranged at the central positions of the chuck A, the chuck B, the gear disc and the shell, the chuck A and the chuck B are in cylindrical structures with the same diameter, a plurality of groups of pin holes are arranged at the corresponding positions of the top of the chuck A and the bottom of the chuck B, pin shafts are inserted between each group of pin holes in an interference manner, a plurality of guide grooves A are arranged between the through hole at the top of the chuck A and the excircle along the circumferential direction, the bottom of the guide groove A is closed, the top and the outer side part of the guide groove A are opened, a plurality of guide grooves B which are in one-to-one correspondence with the guide grooves A are arranged between the through hole at the bottom of the chuck B and the excircle along the circumferential direction, the bottom, the top and the outer side of each guide groove B are open, the intersection of the top and the outer side of each guide groove B is provided with a connecting section, and a sliding top block assembly is movably inserted between each guide groove A and the corresponding guide groove B;
the shell is of a circular groove type structure with an opening at the bottom, a cylindrical gear disc is in clearance fit in a groove of the shell, the chuck B is inserted into the opening at the bottom of the shell in an interference mode, a plane thread is machined at the bottom of the gear disc, the sliding ejector block assembly is matched with the plane thread of the gear disc, a protrusion extends upwards from the outer edge of the top of the gear disc, an inner gear surface is machined on the protrusion, a gear is meshed with the inner gear surface, and an adjusting knob penetrating out of the shell is fixedly inserted into a shaft hole of the gear;
the shaft lever of the inner diameter dial indicator sequentially penetrates through holes at the central positions of the chuck A, the chuck B, the gear disc and the shell, and a bearing is installed at the position matched with the through holes at the central positions of the chuck A and the shell.
Furthermore, three groups of pin holes are formed in the positions corresponding to the top of the chuck A and the bottom of the chuck B.
Furthermore, the number of the guide grooves A is 3, correspondingly, the number of the guide grooves B is 3, and the number of the sliding top block assemblies is 3.
Furthermore, the sliding ejector block assembly comprises an expansion part and a fixed screw thread, the expansion part is movably inserted between the guide groove A and the guide groove B corresponding to the guide groove A, and the fixed screw thread is fixedly arranged at the top of the expansion part and penetrates out of the top of the guide groove B to be matched with the plane thread of the gear disc. Furthermore, the telescopic part is of a T-shaped structure which rotates 90 degrees clockwise and comprises a horizontal section and a vertical section, wherein the horizontal section is positioned at one side close to the inside, the fixed screw teeth are fixedly arranged at one side close to the inside of the top of the vertical section, the outer edges of the vertical sections of all the sliding ejector block assemblies enclose a cylinder, the cylinder can be tightly attached to a hole to be measured, and the guiding is stable; after all the sliding ejector block assemblies are assembled, the outer circle is integrally turned, so that coaxiality is guaranteed. Furthermore, the sliding top block assembly further comprises adjustable threads, the adjustable threads are located on the inner side face of the fixed threads, threaded holes are formed in the adjustable threads along the radial direction, and bolts are connected with the threaded holes in an internal thread mode. The distance between adjustable fixed thread and the adjustable thread of bolt, the cooperation of three has the effect of eliminating plane screw-thread fit clearance, makes to examine a centering more accurate.
Furthermore, the depth of the interference insertion between the chuck B and the shell is the same as the height of the connecting section at the intersection of the top and the outer side of the guide groove B.
Furthermore, the inner gear surface and the gear are meshed by plane straight teeth or plane helical teeth, and an adjusting knob penetrating out of the top of the shell is fixedly inserted in a shaft hole of the gear. Or the inner gear surface is meshed with the gear through space bevel teeth, and an adjusting knob penetrating through the side part of the shell is fixedly inserted in a shaft hole of the gear.
In the invention, the large-hole centering device is sleeved on the shaft lever of the inner diameter dial indicator and can rotate around the shaft lever. During operation, the large hole centering device is placed into the large hole to be measured, the measuring head of the inside diameter dial indicator is placed into the small hole, the adjusting knob is rotated to drive the gear to rotate, and therefore the gear disc rotates. Until all the sliding ejector block assemblies are adjusted to just tightly push against the inner wall of the large hole, the central shaft of the checking fixture is coaxial with the central shaft of the large hole, and the change value can be read by rotating the inner diameter dial indicator, so that whether the coaxiality meets the requirement or not is judged.
The invention has the beneficial effects that: the invention solves the defects that the three-coordinate measuring instrument is difficult to measure the coaxiality of the inner hole and the common inner hole coaxiality check tool is inaccurate in check.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is an exploded view of the macro-porous centering device;
FIG. 4 is a schematic view of the mating of the gear plate, housing, gears and adjustment knob;
in the figure: 1. the inner diameter dial indicator comprises an inner diameter dial indicator 2, a chuck A3, a chuck B4, a gear disc 5, a shell 6, a gear 7, an adjusting knob 8, a bearing 9, a pin hole 10, a pin shaft 11, a guide groove A12, a guide groove B13, a telescopic part 14, a fixed screw thread 15, an adjustable screw thread 16, a bolt 17, a large hole 18 and a small hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, it should be noted that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like as used herein are defined based on the description of fig. 1, and are not intended to limit the above-mentioned orientations, but merely serve to facilitate understanding and description.
Example 1:
as shown in fig. 1 to 4, the inner hole coaxiality testing fixture comprises an inner diameter dial indicator 1 and a large hole centering device, wherein the large hole centering device comprises a chuck A2, a chuck B3, a gear disc 4, a shell 5, a sliding top block assembly, a gear 6 and an adjusting knob 7;
wherein the chuck A2, the chuck B3, the gear disc 4 and the shell 5 are coaxially arranged from bottom to top, and through holes are arranged at the central positions, the chuck A2 and the chuck B3 are of cylindrical structures with the same diameter, three groups of pin holes 9 are formed in the positions, corresponding to the top of the chuck A2 and the bottom of the chuck B3, of the chuck A2, pin shafts 10 are inserted between the pin holes 9 in each group in an interference insertion mode, three guide grooves A11 are arranged between the through hole at the top of the chuck A2 and the excircle along the circumferential direction, the bottom of the guide groove A11 is closed, the top and the outer side part are opened, three guide grooves B12 which are in one-to-one correspondence with the guide grooves A11 are arranged between the through hole at the bottom of the chuck B3 and the excircle along the circumferential direction, the bottom, the top and the outer side of the guide groove B12 are all open, the intersection of the top and the outer side is provided with a connecting section, and a sliding top block assembly is movably inserted between each guide groove A11 and the corresponding guide groove B12;
the outer shell 5 is of a circular groove type structure with an opening at the bottom, a cylindrical gear disc 4 is in clearance fit in a groove of the outer shell 5, the chuck B3 is in interference insertion connection in the opening at the bottom of the outer shell 5, the interference insertion depth of the chuck B3 and the outer shell 5 is the same as the height of a connecting section at the intersection of the top and the outer side of the guide groove B12, a plane thread is processed at the bottom of the gear disc 4, the sliding ejector block assembly is matched with the plane thread of the gear disc 4, a bulge extends upwards from the outer edge of the top of the gear disc 4, an inner gear surface is processed on the bulge, a gear 6 is meshed with the inner gear surface, the inner gear surface is meshed with the gear 6 through a plane straight tooth, and an adjusting knob 7 penetrating through the top of the outer shell 5 is fixedly inserted in a shaft hole of;
the sliding top block assembly comprises a telescopic part 13 and a fixed screw thread 14, the telescopic part 13 is movably inserted between the guide groove A11 and the guide groove B12 corresponding to the guide groove A11, and the fixed screw thread 14 is fixedly arranged at the top of the telescopic part 13 and penetrates out of the top of the guide groove B12 to be matched with the plane thread of the gear disc 4. The telescopic part 13 is of a T-shaped structure which rotates 90 degrees clockwise and comprises a horizontal section and a vertical section, wherein the horizontal section is positioned at one side close to the inside, the fixed screw thread 14 is fixedly arranged at one side close to the inside of the top of the vertical section, the outer edges of the vertical sections of all the sliding ejector block assemblies enclose a cylinder, the cylinder can be tightly attached to a hole to be measured, and the guiding is stable; after all the sliding ejector block assemblies are assembled, the outer circle is integrally turned, so that coaxiality is guaranteed. The sliding top block assembly further comprises an adjustable screw thread 15, the adjustable screw thread 15 is located on the inner side face of the fixed screw thread 14, a threaded hole is formed in the position between the inner side face and the fixed screw thread along the radial direction, and a bolt 16 is connected to the threaded hole in an internal thread mode. The distance between the fixed threads 14 and the adjustable threads 15 can be adjusted by the bolt 16, and the cooperation of the fixed threads, the adjustable threads and the adjustable threads has the function of eliminating the fit clearance of plane threads, so that the centering of the checking fixture is more accurate.
The shaft rod of the inside diameter dial indicator 1 sequentially penetrates through holes at the central positions of the chuck A2, the chuck B3, the gear disc 4 and the shell 5, and a bearing 8 is installed at the matching position of the shaft rod and the through holes at the central positions of the chuck A2 and the shell 5.
In this embodiment, the large hole centering device is sleeved on the shaft lever of the inside diameter dial indicator 1 and can rotate around the shaft lever. During operation, the large hole centering device is placed into the large hole 17 to be measured, the measuring head of the inside diameter dial indicator is placed into the small hole 18, the adjusting knob 7 is rotated to drive the gear 6 to rotate, and therefore the gear disc 4 rotates, and all sliding ejection block assemblies slide outwards or inwards simultaneously due to the matching of the fixed threads 14 and the adjustable threads 15 on the sliding ejection block assemblies and the plane threads of the gear disc 4. Until all the sliding ejector block assemblies are adjusted to just tightly push against the inner wall of the large hole 17, the central shaft of the checking fixture is coaxial with the central shaft of the large hole 17, and the change value can be read by rotating the inner diameter dial gauge 1, so that whether the coaxiality meets the requirement or not is judged.
The foregoing is a detailed description of the invention, and specific examples are used herein to explain the principles and implementations of the invention, the above description being merely intended to facilitate an understanding of the principles and core concepts of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides an utensil is examined to hole axiality, includes the internal diameter percentage table, its characterized in that: the large-hole centering device comprises a chuck A, a chuck B, a gear disc, a shell, a sliding top block assembly, a gear and an adjusting knob;
wherein the chuck A, the chuck B, the gear disc and the shell are coaxially arranged from bottom to top, and through holes are arranged at the central positions of the chuck A, the chuck B, the gear disc and the shell, the chuck A and the chuck B are in cylindrical structures with the same diameter, a plurality of groups of pin holes are arranged at the corresponding positions of the top of the chuck A and the bottom of the chuck B, pin shafts are inserted between each group of pin holes in an interference manner, a plurality of guide grooves A are arranged between the through hole at the top of the chuck A and the excircle along the circumferential direction, the bottom of the guide groove A is closed, the top and the outer side part of the guide groove A are opened, a plurality of guide grooves B which are in one-to-one correspondence with the guide grooves A are arranged between the through hole at the bottom of the chuck B and the excircle along the circumferential direction, the bottom, the top and the outer side of each guide groove B are open, the intersection of the top and the outer side of each guide groove B is provided with a connecting section, and a sliding top block assembly is movably inserted between each guide groove A and the corresponding guide groove B;
the shell is of a circular groove type structure with an opening at the bottom, a cylindrical gear disc is in clearance fit in a groove of the shell, the chuck B is inserted into the opening at the bottom of the shell in an interference mode, a plane thread is machined at the bottom of the gear disc, the sliding ejector block assembly is matched with the plane thread of the gear disc, a protrusion extends upwards from the outer edge of the top of the gear disc, an inner gear surface is machined on the protrusion, a gear is meshed with the inner gear surface, and an adjusting knob penetrating out of the shell is fixedly inserted into a shaft hole of the gear;
the shaft lever of the inner diameter dial indicator sequentially penetrates through holes at the central positions of the chuck A, the chuck B, the gear disc and the shell, and a bearing is installed at the position matched with the through holes at the central positions of the chuck A and the shell.
2. The inner bore coaxiality gauge according to claim 1, characterized in that: and three groups of pin holes are formed in the positions corresponding to the top of the chuck A and the bottom of the chuck B.
3. The inner bore coaxiality gauge according to claim 1, characterized in that: the quantity of guide way A is 3, and is corresponding, the quantity of guide way B is 3, the quantity of slip kicking block subassembly is 3.
4. The inner bore coaxiality gauge according to claim 1, characterized in that: the sliding ejector block assembly comprises a telescopic portion and a fixed screw thread, the telescopic portion is movably inserted between the guide groove A and the guide groove B corresponding to the guide groove A, and the fixed screw thread is fixedly arranged at the top of the telescopic portion and matched with the plane thread of the gear disc at the top of the guide groove B in a penetrating mode.
5. The inner bore coaxiality inspection device according to claim 4, wherein: the telescopic part is a T-shaped structure which rotates 90 degrees clockwise and comprises a horizontal section and a vertical section, wherein the horizontal section is positioned on one side close to the inside, and the fixed screw threads are fixedly arranged on one side close to the inside of the top of the vertical section.
6. The inner bore coaxiality inspection device according to claim 5, wherein: the sliding ejection block assembly further comprises adjustable threads, the adjustable threads are located on the inner side face of the fixed threads, threaded holes are formed in the adjustable threads along the radial direction, and bolts are connected with the threaded holes in an internal thread mode.
7. The inner bore coaxiality gauge according to claim 1, characterized in that: the depth of the interference insertion between the chuck B and the shell is the same as the height of the connecting section at the intersection of the top and the outer side of the guide groove B.
8. The inner bore coaxiality gauge according to claim 1, characterized in that: the inner gear face and the gear are meshed by plane straight teeth or plane helical teeth, and an adjusting knob penetrating out of the top of the shell is fixedly inserted into a shaft hole of the gear.
9. The inner bore coaxiality gauge according to claim 1, characterized in that: the inner gear surface is meshed with the gear through space bevel teeth, and an adjusting knob penetrating out of the side part of the shell is fixedly inserted in a shaft hole of the gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960946.8A CN111912321B (en) | 2020-09-14 | 2020-09-14 | Inner hole coaxiality gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960946.8A CN111912321B (en) | 2020-09-14 | 2020-09-14 | Inner hole coaxiality gauge |
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| CN111912321A true CN111912321A (en) | 2020-11-10 |
| CN111912321B CN111912321B (en) | 2021-12-14 |
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| CN202010960946.8A Active CN111912321B (en) | 2020-09-14 | 2020-09-14 | Inner hole coaxiality gauge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376647A (en) * | 2021-06-08 | 2021-09-10 | 东北大学 | Blast hole measurement auxiliary equipment and use method thereof |
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| US3882608A (en) * | 1974-01-16 | 1975-05-13 | Zero Gage Co | Differential-probe hole-location or concentricity gauge |
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| CN105222690A (en) * | 2015-10-15 | 2016-01-06 | 南车青岛四方机车车辆股份有限公司 | Hole-bored axle from end to end coaxiality of inner hole pick-up unit |
| CN105486285A (en) * | 2015-12-28 | 2016-04-13 | 吉林大学 | Adjustable three-jaw chuck type gradiograph strengthening device |
| CN105547106A (en) * | 2016-02-02 | 2016-05-04 | 南京信息职业技术学院 | Depth aperture internal diameter measurement device |
| CN106694923A (en) * | 2016-12-01 | 2017-05-24 | 重庆友擘机械制造有限公司 | Conveniently-adjustable three-jaw chuck |
| CN206248006U (en) * | 2016-12-21 | 2017-06-13 | 西南石油大学 | Deep hole internal diameter measuring instrument |
| CN206311052U (en) * | 2017-01-06 | 2017-07-07 | 苏康 | A kind of coaxality measuring mechanism in adjustable hole |
| CN206321195U (en) * | 2016-12-31 | 2017-07-11 | 马鞍山威泰机电有限公司 | A kind of axiality detection device of power-assisted steering motor housing |
| CN108161497A (en) * | 2017-12-27 | 2018-06-15 | 山推工程机械股份有限公司 | A kind of positioning device |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882608A (en) * | 1974-01-16 | 1975-05-13 | Zero Gage Co | Differential-probe hole-location or concentricity gauge |
| CN101224504A (en) * | 2008-02-20 | 2008-07-23 | 昆山华恒工程技术中心有限公司 | Self centering chuck |
| CN102519345A (en) * | 2011-11-24 | 2012-06-27 | 陈寿权 | Coaxiality detection device of motor end cover |
| CN204630536U (en) * | 2015-03-20 | 2015-09-09 | 安徽铖友汽车零部件制造有限公司 | A kind of coaxial degree pick-up unit |
| CN105222690A (en) * | 2015-10-15 | 2016-01-06 | 南车青岛四方机车车辆股份有限公司 | Hole-bored axle from end to end coaxiality of inner hole pick-up unit |
| CN105486285A (en) * | 2015-12-28 | 2016-04-13 | 吉林大学 | Adjustable three-jaw chuck type gradiograph strengthening device |
| CN105547106A (en) * | 2016-02-02 | 2016-05-04 | 南京信息职业技术学院 | Depth aperture internal diameter measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376647A (en) * | 2021-06-08 | 2021-09-10 | 东北大学 | Blast hole measurement auxiliary equipment and use method thereof |
| CN113376647B (en) * | 2021-06-08 | 2024-04-26 | 东北大学 | Blast hole measurement auxiliary equipment and application method thereof |
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| Publication number | Publication date |
|---|---|
| CN111912321B (en) | 2021-12-14 |
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