CN113188411A - Detection tool for detecting tooth root diameter and span bar distance of flywheel disc - Google Patents
Detection tool for detecting tooth root diameter and span bar distance of flywheel disc Download PDFInfo
- Publication number
- CN113188411A CN113188411A CN202110439600.8A CN202110439600A CN113188411A CN 113188411 A CN113188411 A CN 113188411A CN 202110439600 A CN202110439600 A CN 202110439600A CN 113188411 A CN113188411 A CN 113188411A
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- sliding seat
- fixedly connected
- linear guide
- guide rail
- root diameter
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- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a checking fixture for detecting the tooth root diameter and the span bar distance of a flywheel disc, wherein the flywheel disc is positioned by setting a first calibration part to zero for a digital display dial indicator, the measurement is carried out by the digital display dial indicator, the measured value and a standard part value are added and subtracted to obtain a value, and the span bar distance is obtained by adding the diameter of a measuring bar; give with the second calibration piece the digital display amesdial sets zero, later with fixed the placing in flywheel dish root diameter of a measuring piece, the second measuring piece of the other end digital display amesdial removes the measurement, then add and subtract according to the measured value and the root diameter mark piece actual value, obtain the root diameter value of flywheel dish here at last, the reagent size of the display product that so can be quick, avoid the defective work to flow in the customer, there is guiding effect to the production debugging, this examines the excellent distance of striding that can quick detect out the product and the root diameter of a tooth, improve detection efficiency.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a detection tool for detecting the tooth root diameter and the span bar distance of a flywheel disc.
Background
At present, the tooth root diameter and the span bar distance of the flywheel disc are measured by a go-no go gauge or a caliper, whether the measurement is qualified or not can be only measured by the go-no go gauge, the actual value of the size of a product cannot be measured, and the method has little guiding effect on product debugging.
When the caliper is used for measuring the tooth root diameter, the caliper has high requirements on measurement operators, and the operators are required to carry out measurement for many times in order to ensure the measurement precision during measurement, so that the detection efficiency of the flywheel disc is influenced.
Disclosure of Invention
The invention aims to provide a detection tool for detecting the tooth root diameter and the span bar distance of a flywheel disc, and aims to solve the technical problem that in the prior art, when the tooth root diameter is measured by a caliper, the requirement of the caliper on measurement operators is high, and the operators are required to perform multiple measurements in order to ensure the measurement precision during measurement, so that the detection efficiency of the flywheel disc is influenced.
In order to achieve the purpose, the invention provides a detection tool for detecting the tooth root diameter and the span bar distance of a flywheel disc, which comprises a bottom plate, a first calibration piece, a second calibration piece, a measuring device, an adjusting device and a positioning device;
the first calibration piece is placed on the bottom plate and is positioned at one side of the bottom plate, the second calibration piece is placed on the bottom plate and is positioned at one side of the bottom plate close to the first calibration piece, and the positioning device is fixedly connected with the bottom plate;
the measuring device comprises a linear guide rail, a first measuring block, a second measuring block and a digital display dial indicator, the linear guide rail is fixedly connected with the bottom plate and is located at one side of the second calibrating piece, the bottom plate is close to one side of the second calibrating piece, the first measuring block is connected with the linear guide rail in a sliding mode and is located at one end of the linear guide rail, the second measuring block is connected with the linear guide rail in a sliding mode and is located at one end, far away from the linear guide rail, of the first measuring block, the digital display dial indicator is fixedly connected with the second measuring block and is located at one side, far away from the second measuring block, of the first measuring block.
The adjusting device comprises a first sliding seat, a second sliding seat, a third sliding seat and a fourth sliding seat, wherein the first sliding seat is connected with the linear guide rail in a sliding manner, is fixedly connected with the first measuring block and is positioned on one side of the linear guide rail, which is close to the first measuring block; the second sliding seat is connected with the linear guide rail in a sliding manner; the third sliding seat is connected with the linear guide rail in a sliding manner, is fixedly connected with the second measuring block and is positioned on one side of the linear guide rail, which is close to the second measuring block; and the fourth sliding seat is connected with the linear guide rail in a sliding manner.
The positioning device comprises a positioning block and a first bushing, wherein the positioning block is fixedly connected with the first sliding seat and is positioned on one side of the first sliding seat, which is far away from the third sliding seat; the first bushing is fixedly connected with the positioning block and is positioned on one side, far away from the bottom plate, of the positioning block.
The positioning device further comprises a limiting baffle, and the limiting baffle is fixedly connected with the base and is positioned between the first sliding seat and the fourth sliding seat.
The positioning assembly further comprises a bolt, wherein the bolt is connected with the second sliding seat in a sliding mode, abutted to the linear guide rail and penetrates through the second sliding seat.
The positioning assembly further comprises a stop block, the stop block is fixedly connected with the base, is abutted to the linear guide rail and is positioned on one side, away from the digital display dial indicator, of the linear guide rail.
The measuring device further comprises a pressing block and a spring, wherein the pressing block is fixedly connected with the digital display dial indicator, is connected with the third sliding seat in a sliding manner, and is positioned on one side, close to the third sliding seat, of the digital display dial indicator; one end of the spring is fixedly connected with the pressing block, the other end of the spring is fixedly connected with the third sliding seat, and the spring is located between the pressing block and the third sliding seat.
The measuring device further comprises a guide post and a second bushing, wherein the guide post is fixedly connected with the third sliding seat, is in sliding connection with the pressing block and is positioned on one side, close to the pressing block, of the third sliding seat; the second bushing is fixedly connected with the third sliding seat, fixedly connected with the guide post and sleeved on the outer side of the guide post.
The supporting device further comprises a supporting component, the supporting component is fixedly connected with the bottom plate, is connected with the third sliding seat in a sliding mode, and is fixedly connected with the linear guide rail, and the supporting component is located on one side, close to the third sliding seat, of the bottom plate.
The detection tool for detecting the tooth root diameter and the span bar distance of the flywheel disc further comprises a bottom foot, and the bottom foot is fixedly connected with the bottom plate and is positioned on one side, far away from the linear guide rail, of the bottom plate.
According to the gauge for detecting the tooth root diameter and the span bar distance of the flywheel disc, the first calibration part is used for setting the digital display dial indicator to be zero, the flywheel disc is positioned, the digital display dial indicator is used for measuring, the measured value and the standard part value are added and subtracted to obtain a value, and the diameter of the measuring bar is added to obtain the span bar distance; give with the second calibration piece the digital display amesdial sets zero, later with fixed the placing in flywheel dish root diameter of a measuring piece, the second measuring piece of the other end digital display amesdial removes the measurement, then add and subtract according to the measured value and the root diameter mark piece actual value, obtain the root diameter value of flywheel dish here at last, the reagent size of the display product that so can be quick, avoid the defective work to flow in the customer, there is guiding effect to the production debugging, this examines the excellent distance of striding that can quick detect out the product and the root diameter of a tooth, improve detection efficiency.
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 side view of a checking fixture for detecting the tooth root diameter and the span bar distance of a flywheel disc.
FIG. 2 is a top view of the checking fixture for detecting the tooth root diameter and the span bar distance of the flywheel disc.
In the figure: the device comprises a base foot 1, a bottom plate 2, a stop block 3, a plug pin 4, a locating block 5, a first bushing 6, a linear guide rail 7, a first sliding seat 8, a first measuring block 9, a reference cushion block 10, a second sliding seat 11, a supporting block 12, a second bushing 13, a guide pillar 14, a third sliding seat 15, a pressing block 16, a spring 17, a second measuring block 18, a fourth sliding seat 19, a dial grip 20, a limit baffle 21, an alloy pin 22, a digital display dial indicator 23, a first calibrating piece 24 and a second calibrating piece 25.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and 2, the invention provides a checking fixture for detecting a tooth root diameter and a span bar distance of a flywheel disc, which comprises a base plate 2, a first calibrating piece 24, a second calibrating piece 25, a measuring device, an adjusting device and a positioning device;
the first calibrating piece 24 is placed on the bottom plate 2 and positioned at one side of the bottom plate 2, the second calibrating piece 25 is placed on the bottom plate 2 and positioned at one side of the bottom plate 2 close to the first calibrating piece 24, and the positioning device is fixedly connected with the bottom plate 2;
the measuring device comprises a linear guide rail 7, a first measuring block 9, a second measuring block 18 and a digital display dial indicator 23, the linear guide rail 7 is fixedly connected with the bottom plate 2 and is positioned at one side of the second calibrating piece 25, the first measuring block 9 is slidably connected with the linear guide rail 7 and is positioned at one end of the linear guide rail 7, the second measuring block 18 is slidably connected with the linear guide rail 7 and is positioned at one end of the first measuring block 9, the linear guide rail 7 is far away from the digital display dial indicator 23 is fixedly connected with the second measuring block 18 and is positioned at one side of the first measuring block 9, and the second measuring block 18 is far away from the first measuring block 9.
In the embodiment, the bottom plate 2 is provided with a supporting block 12 for supporting a flywheel disc, the outer side surface of the flywheel disc is provided with an alloy pin 22, when the bar span distance is measured, the first calibrating piece 24 is firstly placed on the linear guide rail 7 for measuring the bar span distance, then the digital display dial indicator 23 is set to be zero by the first calibrating piece 24 (note: the value of the calibrating piece needs to be an actual measurement value), then the flywheel disc is positioned on the checking tool through a central hole and a bolt hole, then the digital display dial indicator 23 is used for measuring, the measured value and the standard piece value are added or subtracted to obtain a value, and the diameter of the measuring bar is added to obtain the bar span distance;
when the diameter of the tooth root is measured, the second calibration piece 25 is firstly placed on the linear guide rail 7 for measuring the diameter of the tooth root, then, the digital dial indicator 23 is set to zero by the second calibrating piece 25 (note that the value of the calibrating block needs to be an actual measurement value), then the first measuring block 9 at one end is fixedly placed on the tooth root diameter of the flywheel disc, the second measuring block 18 with the digital dial indicator 23 at the other end is used for measurement, then adding or subtracting according to the measured value and the actual value of the tooth root diameter calibration block to finally obtain the tooth root diameter value of the flywheel disc, therefore, the detecting tool for detecting the tooth root diameter and the span bar distance of the flywheel disc adopts a direct digital display dial indicator, can rapidly display the reagent size of a product, avoids unqualified products from flowing into customers, the gauge has an instructive effect on production debugging, can quickly detect the span length and the root diameter of a product, and improves the detection efficiency.
Further, referring to fig. 2, the adjusting device includes a first slide 8, a second slide 11, a third slide 15, and a fourth slide 19, where the first slide 8 is slidably connected to the linear guide 7, and is fixedly connected to the first measuring block 9, and is located on a side of the linear guide 7 close to the first measuring block 9; the second sliding seat 11 is connected with the linear guide rail 7 in a sliding manner; the third sliding seat 15 is connected with the linear guide rail 7 in a sliding manner, is fixedly connected with the second measuring block 18, and is located on one side of the linear guide rail 7 close to the second measuring block 18; the fourth slide carriage 19 is connected to the linear guide 7 in a sliding manner.
In this embodiment, the linear guide 7 is "X" shaped, the first slide 8 and the third slide 15 are connected to each other and located on a straight line of the linear guide 7, a digital dial indicator 23 is installed on the third slide 15, the second slide 11 and the fourth slide 19 are connected to each other and located on a straight line of the linear guide 7, the first slide 8 and the third slide 15 drive the first measuring block 9 and the second measuring block 18 to slide, and the second slide 11 and the fourth slide 19 are the same.
Further, referring to fig. 2, the positioning device includes a positioning block 5 and a first bushing 6, the positioning block 5 is fixedly connected to the first sliding seat 8 and is located on a side of the first sliding seat 8 away from the third sliding seat 15; the first bushing 6 is fixedly connected with the positioning block 5 and is located on one side of the positioning block 5 far away from the bottom plate 2.
In the present embodiment, the first bushing 6 is mounted on the positioning block 5, and the positioning block 5 is screwed on the first slide base 8 to mount the first measuring block 9.
Further, referring to fig. 2, the positioning device further includes a limit baffle 21, and the limit baffle 21 is fixedly connected to the base and located between the first slide 8 and the fourth slide 19.
In this embodiment, the limit baffle 21 is installed on the base in a threaded manner, and protects the outer side edge of the flywheel disk, so that the transverse displacement of the flywheel disk in the rotating process is avoided.
Further, referring to fig. 1, the positioning assembly further includes a pin 4, and the pin 4 is slidably connected to the second slide 11, abuts against the linear guide 7, and penetrates through the second slide 11.
In this embodiment, the latch 4 is mounted in a reference block 10 for mounting the flywheel disc.
Further, referring to fig. 1, the positioning assembly further includes a stopper 3, and the stopper 3 is fixedly connected to the base, abuts against the linear guide rail 7, and is located on one side of the linear guide rail 7 away from the digital dial indicator 23.
In the present embodiment, the stopper 3 is screw-mounted on the base and supports the side end of the linear guide 7, thereby stabilizing the linear guide 7.
Further, referring to fig. 2, the measuring device further includes a pressing block 16 and a spring 17, the pressing block 16 is fixedly connected to the digital display dial indicator 23, and is slidably connected to the third slide carriage 15, and is located on one side of the digital display dial indicator 23 close to the third slide carriage 15; one end of the spring 17 is fixedly connected with the pressing block 16, and the other end of the spring is fixedly connected with the third sliding seat 15 and is positioned between the pressing block 16 and the third sliding seat 15.
In the present embodiment, the pressing block 16 is attached to the digital dial indicator 23 through the dial bushing 20, and slides the digital dial indicator 23 together, and the spring 17 is attached between the third slide carriage 15 and the pressing block 16, and reduces the sliding of the pressing block 16.
Further, referring to fig. 2, the measuring apparatus further includes a guide pillar 14 and a second bushing 13, the guide pillar 14 is fixedly connected to the third sliding seat 15, and is slidably connected to the pressing block 16, and is located on a side of the third sliding seat 15 close to the pressing block 16; the second bushing 13 is fixedly connected to the third slide carriage 15, fixedly connected to the guide post 14, and sleeved on the outer side of the guide post 14.
In the present embodiment, the guide post 14 is transversely mounted on the third slide carriage 15, the second bush 13 is fitted on the outer side of the guide post 14, and the second bush 13 abuts against the sliding of the press block 16.
Further, referring to fig. 1, the supporting device further includes a supporting component, the supporting component is fixedly connected to the bottom plate 2, slidably connected to the third sliding seat 15, and fixedly connected to the linear guide 7, and the supporting component is located on one side of the bottom plate 2 close to the third sliding seat 15.
In the present embodiment, the support assembly is screwed to the base plate 2 and supports the sliding movement of the third carriage 15.
Further, referring to fig. 1, the detection tool for detecting the tooth root diameter and the span bar distance of the flywheel disc further comprises a bottom foot 1, and the bottom foot 1 is fixedly connected with the bottom plate 2 and is located on one side of the bottom plate 2, which is far away from the linear guide rail 7.
In the present embodiment, the feet 1 are installed at the bottom of the bottom plate 2, and the number of the feet is two, and the feet are used for supporting the bottom plate 2.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A detection tool for detecting the tooth root diameter and the span bar distance of a flywheel disc is characterized by comprising a bottom plate, a first calibration piece, a second calibration piece, a measuring device, an adjusting device and a positioning device;
the first calibration piece is placed on the bottom plate and is positioned at one side of the bottom plate, the second calibration piece is placed on the bottom plate and is positioned at one side of the bottom plate close to the first calibration piece, and the positioning device is fixedly connected with the bottom plate;
the measuring device comprises a linear guide rail, a first measuring block, a second measuring block and a digital display dial indicator, the linear guide rail is fixedly connected with the bottom plate and is located at one side of the second calibrating piece, the bottom plate is close to one side of the second calibrating piece, the first measuring block is connected with the linear guide rail in a sliding mode and is located at one end of the linear guide rail, the second measuring block is connected with the linear guide rail in a sliding mode and is located at one end, far away from the linear guide rail, of the first measuring block, the digital display dial indicator is fixedly connected with the second measuring block and is located at one side, far away from the second measuring block, of the first measuring block.
2. The tool for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 1,
the adjusting device comprises a first sliding seat, a second sliding seat, a third sliding seat and a fourth sliding seat, wherein the first sliding seat is connected with the linear guide rail in a sliding manner, is fixedly connected with the first measuring block and is positioned on one side of the linear guide rail, which is close to the first measuring block; the second sliding seat is connected with the linear guide rail in a sliding manner; the third sliding seat is connected with the linear guide rail in a sliding manner, is fixedly connected with the second measuring block and is positioned on one side of the linear guide rail, which is close to the second measuring block; and the fourth sliding seat is connected with the linear guide rail in a sliding manner.
3. The tool for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 1,
the positioning device comprises a positioning block and a first bushing, the positioning block is fixedly connected with the first sliding seat and is positioned on one side of the first sliding seat, which is far away from the third sliding seat; the first bushing is fixedly connected with the positioning block and is positioned on one side, far away from the bottom plate, of the positioning block.
4. The checking fixture for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 2,
the positioning device further comprises a limiting baffle, and the limiting baffle is fixedly connected with the base and is positioned between the first sliding seat and the fourth sliding seat.
5. The checking fixture for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 2,
the positioning assembly further comprises a bolt, and the bolt is connected with the second sliding seat in a sliding mode, abutted to the linear guide rail and penetrating through the second sliding seat.
6. The tool for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 1,
the positioning assembly further comprises a stop block, the stop block is fixedly connected with the base, is abutted to the linear guide rail and is positioned on one side, away from the digital display dial indicator, of the linear guide rail.
7. The checking fixture for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 2,
the measuring device further comprises a pressing block and a spring, the pressing block is fixedly connected with the digital display dial indicator, is connected with the third sliding seat in a sliding manner, and is positioned on one side, close to the third sliding seat, of the digital display dial indicator; one end of the spring is fixedly connected with the pressing block, the other end of the spring is fixedly connected with the third sliding seat, and the spring is located between the pressing block and the third sliding seat.
8. The tool for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 7,
the measuring device also comprises a guide pillar and a second bushing, wherein the guide pillar is fixedly connected with the third sliding seat, is connected with the pressing block in a sliding manner, and is positioned on one side of the third sliding seat, which is close to the pressing block; the second bushing is fixedly connected with the third sliding seat, fixedly connected with the guide post and sleeved on the outer side of the guide post.
9. The checking fixture for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 2,
the supporting device further comprises a supporting component, the supporting component is fixedly connected with the bottom plate, is connected with the third sliding seat in a sliding mode, and is fixedly connected with the linear guide rail, and the supporting component is located on one side, close to the third sliding seat, of the bottom plate.
10. The tool for detecting the tooth root diameter and the span bar distance of the flywheel disc as claimed in claim 1,
the detection tool for detecting the tooth root diameter and the span bar distance of the flywheel disc further comprises a bottom foot, and the bottom foot is fixedly connected with the bottom plate and is positioned on one side, far away from the linear guide rail, of the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439600.8A CN113188411A (en) | 2021-04-23 | 2021-04-23 | Detection tool for detecting tooth root diameter and span bar distance of flywheel disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439600.8A CN113188411A (en) | 2021-04-23 | 2021-04-23 | Detection tool for detecting tooth root diameter and span bar distance of flywheel disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113188411A true CN113188411A (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110439600.8A Pending CN113188411A (en) | 2021-04-23 | 2021-04-23 | Detection tool for detecting tooth root diameter and span bar distance of flywheel disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113188411A (en) |
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| CN111623743A (en) * | 2020-06-29 | 2020-09-04 | 南京信息工程大学 | Online measuring tool and method for span length of inner gear ring |
| CN212378679U (en) * | 2020-05-06 | 2021-01-19 | 柳州市龙杰汽车配件有限责任公司 | Special detection tool for gear hub of gearbox |
| CN212620516U (en) * | 2020-07-03 | 2021-02-26 | 麦格纳汽车动力总成(天津)有限公司 | Cross-rod distance measuring device |
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| US2503871A (en) * | 1945-02-23 | 1950-04-11 | John J Hartl | Straddle gauge for cylindrical work |
| RU2148786C1 (en) * | 1995-06-06 | 2000-05-10 | Борис Иосифович Синельников | Gear testing axial distance, lack of parallelism and crossing of axes of holes in connecting rod of engine |
| JP2007240489A (en) * | 2006-03-13 | 2007-09-20 | Space Creation:Kk | Device for measuring over-pin diameter |
| JP2013061256A (en) * | 2011-09-14 | 2013-04-04 | System Seiko Kk | Eccentricity measuring instrument |
| CN107525453A (en) * | 2017-10-08 | 2017-12-29 | 孙阳 | A kind of external tooth distance over bar detection means |
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Application publication date: 20210730 |