CN114383490B - Shaft hole key groove symmetry and angle deviation detection device - Google Patents
Shaft hole key groove symmetry and angle deviation detection device Download PDFInfo
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- CN114383490B CN114383490B CN202210067726.1A CN202210067726A CN114383490B CN 114383490 B CN114383490 B CN 114383490B CN 202210067726 A CN202210067726 A CN 202210067726A CN 114383490 B CN114383490 B CN 114383490B
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- 238000001514 detection method Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 2
- 108700041286 delta Proteins 0.000 claims description 2
- 238000007689 inspection Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
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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
Abstract
The invention relates to the technical field of key slot error detection, and discloses a device for detecting symmetry and angle deviation of a shaft hole key slot, which comprises the following components: the positioning assembly is used for installing and positioning the part to be tested; the detection assembly is detachably arranged with the positioning assembly and is used for installing a detection tool; the detection tool detects symmetry and angle deviation of a key groove to be detected of a part to be detected after the detection component and the positioning component are matched and installed, the detection component and the positioning component are matched and installed after the part to be detected is installed and fixed through the positioning component, then the detection tool installed on the detection component measures the symmetry and angle deviation of the key groove to be detected, each part to be detected can be fixed at the same position, then the key groove to be detected is stably and efficiently detected through the detection component, manual participation is fully reduced, and detection efficiency and precision are improved.
Description
Technical Field
The invention relates to the technical field of key slot error detection, in particular to a device for detecting symmetry and angle deviation of a shaft hole key slot.
Background
The key is used as a high-precision and large-bearing connection mode, is often arranged on a driving shaft or a crank of mechanical equipment and is used for outputting torque for transmitting large load, and if the torque is too large or multiple places are needed for transmitting the torque, the key can be realized by double key grooves and multiple key grooves;
for example, a cross-over roller way is often required on the existing glass deep processing connecting line, parallel rollers are used for conveying glass, a lifting belt line perpendicular to the rollers is used for conveying the glass in the vertical direction when required, and a crank connecting rod lifting mechanism is used for lifting the belt;
in order to enable the link mechanism to reliably lift and ensure that the belt line mounted on the top is always in a horizontal state in the lifting process, besides the requirement that the crank in the link mechanism has higher dimensional accuracy, the mounting position of the crank is more required to be consistent in height, and the mounting position of the crank is more required to be consistent depending on the accuracy of the part to be detected and the key groove on the crank. Therefore, before the lifting mechanism is assembled, all parts to be tested and the crank are required to be used as the parts to be tested, and the relevant parameters of the key slot to be tested are detected.
However, in actual operation, the symmetry degree of the keyways to be detected or the angle deviation between the keyways to be detected are detected one by adopting related detection tools manually, which is time-consuming and labor-consuming, and the manual detection inevitably generates detection errors due to human factors.
Disclosure of Invention
The invention aims to provide a device for detecting symmetry and angle deviation of shaft hole keyways, which solves the following technical problems:
how to carry out high-efficient and accurate detection to the keyway that awaits measuring on the part that awaits measuring.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a shaft hole class keyway symmetry and angle deviation detection device, includes:
the positioning assembly is used for installing and positioning the part to be tested;
the detection assembly is detachably arranged with the positioning assembly and is used for installing a detection tool;
the detection tool detects symmetry and angle deviation of the key slot to be detected of the part to be detected after the detection assembly and the positioning assembly are matched and installed.
As a further scheme of the invention: the detection assembly comprises a lower pressing block; the detection tool comprises an angle measuring instrument;
the angle measuring instrument is fixed with the lower pressing block, and the lower pressing block is used for tightly fixing the part to be measured on the positioning assembly.
As a further scheme of the invention: the detection assembly comprises a floating block which is in sliding connection with the lower pressing block, and one end, away from the lower pressing block, of the floating block is in plug-in matching with the key slot to be detected;
the detection tool comprises screw micrometers arranged at two sides of the floating block in pairs; the detection ends of the screw micrometer are respectively abutted against two opposite side surfaces of the floating block in the sliding direction.
As a further scheme of the invention: the detection assembly comprises a detection block which is inserted and matched with the key slot to be detected, and a clamping groove which is matched with the detection block is formed in one side, away from the lower pressing block, of the floating block.
As a further scheme of the invention: the positioning assembly comprises a V-shaped table, and the part to be tested is mounted on a V-shaped groove of the V-shaped table.
As a further scheme of the invention: one side of the lower pressing block, which is close to the V-shaped groove, is fixed with a boss matched with the notch of the V-shaped groove.
As a further scheme of the invention: the positioning assembly comprises an installation table, and an installation chute matched with the V-shaped table is formed in the installation table.
As a further scheme of the invention: the notch of installation spout is provided with and is used for preventing V type platform drops the anti-drop dog.
The invention has the beneficial effects that:
according to the invention, after the parts to be detected are installed and fixed through the positioning assembly, the detection assembly and the positioning assembly are matched and installed, and then the symmetry degree and the angle deviation of the key slot to be detected are measured through the detection tool installed on the detection assembly, so that each part to be detected can be ensured to be fixed at the same position, then the key slot to be detected is stably and efficiently detected through the detection assembly, the manual participation is fully reduced, and the detection efficiency and the detection precision are improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a prior art tool for detecting the degree of symmetry of a keyway;
FIG. 2 is a schematic diagram showing the overall structure of a detecting device according to a first embodiment of the present invention;
FIG. 3 is a schematic view partly in section showing a side structure of a detecting unit in accordance with a second embodiment of the present invention;
fig. 4 is a schematic diagram of a part of the structure of a detection device in the second embodiment of the present invention.
In the figure: 1. a positioning assembly; 11. a V-shaped table; 12. a V-shaped groove; 13. a mounting table; 14. installing a chute; 15. a drop-preventing stop block; 2. a detection assembly; 21. pressing the block; 22. a boss; 23. a slider; 24. a clamping groove; 25. a detection block; 31. an angle measuring instrument; 32. a screw micrometer; 4. a part to be measured; 5. a crank to be tested; 51. a blind hole; 6. key grooves to be measured; 7. detecting a mandrel; 71. a mandrel groove; 8. a support frame; 81. and positioning the pin shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, in order to detect the symmetry of a key slot in the prior art, when the gauge is used for the first time, zero calibration of a dial indicator 3 is required: pressing a standard shaft N against (pressing by hand along the F direction) a V-shaped positioning groove 12 to center, after the flat key groove N-1 on the shaft is matched with a detection part 21, inserting a gauge rod of a dial gauge 3 into a dial gauge insertion hole 13 of a gauge main body 1, and keeping a detection head of the dial gauge 3 in abutting connection with the bottom surface of a sliding block 2; when the pointer on the dial indicator 3 points to the zero position, the locking screw 15 is screwed in to lock and fix the dial indicator 3, namely the dial indicator 3 realizes zero calibration.
After zero calibration of the dial indicator 3, the following detection steps can be carried out: the shaft N to be measured is pressed against (i.e., manually pressed in the direction F) and centered on the V-shaped positioning groove 12, and when the flat key groove N-1 on the shaft to be measured is fitted with the detecting portion 21, the slider 2 is slid in the axial direction (i.e., the front-rear direction) of the shaft N. Because the flat key groove N-1 is matched and connected with the detection part 21, the detection part 21 can synchronously float along with the flat key groove N-1, and when the symmetry degree of the flat key groove N-1 deviates upwards or downwards, the sliding block 2 can synchronously float up and down and can be quantitatively displayed through the pointer on the dial indicator 3.
It can be seen that although the symmetry degree can be detected by the dial indicator 3, the manual intervention is more and the angular deviation which cannot be synchronized is measured, and the efficiency and the measurement accuracy are lower.
Referring to fig. 2, the present invention is a device for detecting symmetry and angular deviation of a shaft hole key slot, comprising:
the positioning assembly 1 is used for installing and positioning a part 4 to be measured;
the detection assembly 2 is detachably arranged with the positioning assembly 1 and is used for installing a detection tool;
the detection tool detects symmetry and angle deviation of the key groove 6 to be detected of the part 4 to be detected after the detection component 2 and the positioning component 1 are matched and installed.
After the part 4 to be detected is installed and fixed through the positioning assembly 1, the detection assembly 2 and the positioning assembly 1 are matched and installed, then the symmetry degree and the angle deviation of the key groove 6 to be detected are measured through a detection tool installed on the detection assembly 2, the part 4 to be detected can be guaranteed to be fixed at the same position, then the key groove 6 to be detected is stably and efficiently detected through the detection assembly 2, manual participation is fully reduced, and the detection efficiency and the detection precision are improved.
The detection assembly 2 comprises a lower press block 21; the detection means comprises an angle measuring instrument 31; the angle measuring instrument 31 is fixed with the lower pressing block 21, when the lower pressing block 21 tightly presses and fixes the part 4 to be measured on the positioning assembly 1, the positioning assembly 1 can be enhanced to position the part 4 to be measured, and the angle deviation of the key slot 6 to be measured is determined through the angle measuring instrument 31, so that the accurate angle deviation is measured.
The positioning assembly 1 comprises a V-shaped table 11, and the part 4 to be tested can be directly arranged on a V-shaped groove 12 of the V-shaped table 11; in order to increase the fixing effect of the lower pressing block 21 on the part 4 to be tested, a boss 22 matched with the notch of the V-shaped groove 12 is fixed on one side of the lower pressing block 21 close to the V-shaped groove 12; in addition, the positioning assembly 1 can further comprise a mounting table 13, and a mounting chute 14 matched with the V-shaped table 11 is formed in the mounting table 13, so that the V-shaped table 11 can slide and adjust on the mounting table 13 according to the requirement, and the use is convenient.
Further, an anti-drop stop 15 for preventing the V-shaped table 11 from falling off may be provided in the notch of the installation chute 14, so as to improve the stability of the V-shaped table 11 during the sliding adjustment.
The detection assembly 2 comprises a floating block 23 which is in sliding connection with the lower pressing block 21, and one end of the floating block 23 far away from the lower pressing block 21 is in plug-in matching with the key slot 6 to be detected; the inspection tool includes screw micrometers 32 arranged in pairs on both sides of the slider 23; the detection ends of the micrometer screw 32 are respectively abutted against opposite side surfaces of the slider 23 in the slip direction.
Thus, when the lower pressing block 21 downwards presses the part 4 to be measured, one end of the floating block 23, which is close to the key slot 6 to be measured, is spliced and matched with the key slot 6 to be measured, and at the moment, the screw micrometer 32 at two sides is abutted against the floating block 23 to measure the symmetry degree; wherein the micrometer 32 may be selected from a percentage scale or a micrometer scale as required by the accuracy of the detection.
Further, the detecting assembly 2 may include a detecting block 25 inserted and matched with the key slot 6 to be detected, and a clamping groove 24 matched with the detecting block 25 is formed on one side of the slider 23 away from the lower pressing block 21. The detection block 25 is a structure which is produced in advance and matched with the key groove 6 to be detected, can be well spliced and matched with the key groove 6 to be detected, can be replaced according to actual needs, is convenient to use, and can be used for replacing different parts 4 to be detected.
The specific application method of the invention comprises the following steps:
taking a transmission shaft with a plurality of shaft hole keyways with the same specification as a part 4 to be tested, and taking a detection method thereof as an example; firstly, a part 4 to be measured can be placed and positioned on a V-shaped groove 12 of a V-shaped table 11, then a detection block 25 matched with the size of a key groove 6 to be measured is placed in the first key groove 6 to be measured, then a floating block 23 on a lower pressing block 21 is operated to clamp the detection block 25, then a micrometer on two sides is adjusted to be attached to two sides of the floating block 23, display data of an angle measuring instrument 31 are set to zero, readings D1 and D1 on a micrometer I and a micrometer II are recorded, at the moment, symmetry deviation delta 1= (D1-D1)/2 of the key groove 6 to be measured can be obtained, and the angle A1=0 DEG of the key groove 6 to be measured in the first position is defaulted;
then the detection block 25 can be placed in a second position to-be-detected key slot 6 of the part to be detected 4, the detection block 25 is clamped by the floating block 23, the micrometer on two sides is adjusted to be attached to two sides of the floating block 23, readings D2 and D2 on the micrometer I and the micrometer II are recorded, data A2 on the angle meter are recorded, at the moment, the symmetry degree deviation delta 2= (D2-D2)/2 of the second position to-be-detected key slot 6 can be obtained, and the angle deviation A2 of the second position to-be-detected key slot 6 relative to the first position to be-detected key slot is obtained;
and then sequentially detecting the third and fourth key grooves 6 to be detected on the shaft according to the method to respectively obtain symmetry degree deviations delta 3 and delta 4 of the third and fourth key grooves 6 to be detected and angle deviations A3 and A4 of the third and fourth key grooves. So, can enough carry out unified and high accuracy symmetry and the detection of angle to the keyway 6 that awaits measuring of a plurality of on same root axle, again can abundant promotion detection efficiency.
Example two
On the basis of the first embodiment, as shown in fig. 3 and 4, the invention further comprises a positioning seat for positioning the crank 5 to be tested. The positioning seat comprises a supporting frame 8, a detection mandrel 7 matched with a key groove 6 to be detected on the crank 5 to be detected, and a positioning pin 81 matched with a blind hole 51 on the crank 5 to be detected;
the positioning pins 81 are fixed on the support frame 8; the detection core shaft 7 is provided with a core shaft groove 71 matched with the detection block 25.
The crank 5 to be detected is fixed and then can be detected because the crank 5 to be detected has a certain shape, so that the detection of the key slot 6 to be detected is assisted by adopting the detection mandrel 7;
the principle of detecting the symmetry and the angular deviation of the key slot 6 to be detected on the crank 5 to be detected is similar to that of the key slot 6 to be detected on the part 4 to be detected in the first embodiment, and the difference is that the crank 5 to be detected needs to be precisely positioned, and the method is as follows:
firstly, the key groove 6 to be measured passes through the detection mandrel 7, then the crank 5 to be measured is swung, the blind hole 51 on the crank 5 to be measured passes through the positioning pin 81 to be fixed, at this time, the crank 5 to be measured is completely positioned, and the symmetry plane (the plane passing through the central axes of the two holes) of the crank 5 to be measured is completely vertical.
Thereafter, the inspection mandrel 7 is fixed according to the method of processing the part 4 to be inspected in the embodiment, and the precision of the mandrel groove 71 on the inspection mandrel 7 is inspected by inspection, so that the precision of the key groove 6 to be inspected is measured.
The method comprises the following steps: the floating blocks 23 on the supporting table are operated to clamp the detection block, the micrometer on two sides is adjusted to be attached to two sides of the floating blocks 23, readings T1 and T1 on the micrometer I and the micrometer II are recorded, data J1 on the angle meter are recorded, at the moment, the symmetry degree deviation mu 1= (T1-T1)/2 of the key slot 6 to be detected can be obtained, and the angle deviation J1 of the key slot 6 to be detected relative to the symmetry plane of the crank 5 to be detected can be obtained;
and then, other cranks 5 to be detected can be sequentially detected according to the same step method to obtain symmetry degree deviations of mu 2, mu 3 and mu 4 of the second, third and fourth key ways 6 to be detected and angle deviations J2, J3 and J4 of the second, third and fourth key ways 6 to be detected, so that detection of the key ways 6 to be detected of all the cranks 5 to be detected can be rapidly and accurately completed.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (5)
1. The utility model provides a shaft hole class keyway symmetry and angle deviation detection method, detection method uses a shaft hole class keyway symmetry and angle deviation detection device to detect, its characterized in that, detection device includes:
the positioning assembly (1) is used for installing and positioning a part (4) to be measured;
the detection assembly (2) is detachably arranged with the positioning assembly (1) and is used for installing a detection tool;
the detection tool detects symmetry and angle deviation of a key groove (6) to be detected of the part (4) to be detected after the detection component (2) and the positioning component (1) are installed in a matched mode;
the detection assembly (2) comprises a lower pressing block (21), the detection tool comprises an angle measuring instrument (31), the angle measuring instrument (31) is fixed with the lower pressing block (21), and the lower pressing block (21) is used for pressing and fixing the part (4) to be detected on the positioning assembly (1);
the detection assembly (2) comprises a floating block (23) which is in sliding connection with the lower pressing block (21), one end, far away from the lower pressing block (21), of the floating block (23) is in plug-in matching with the key slot (6) to be detected, the detection tool comprises screw micrometers (32) which are arranged on two sides of the floating block (23) in pairs, and detection ends of the screw micrometers (32) are respectively abutted with two opposite sides of the floating block (23) in the sliding direction;
the detection assembly (2) comprises a detection block (25) which is in plug-in matching with the key groove (6) to be detected, and a clamping groove (24) which is matched with the detection block (25) is formed in one side, away from the lower pressing block (21), of the floating block (23);
the detection method comprises the following steps:
taking a transmission shaft with a plurality of shaft hole keyways with the same specification as a part (4) to be measured, firstly placing the part (4) to be measured on a V-shaped groove (12) of a V-shaped table (11), then placing a detection block (25) matched with the size of the keyways (6) to be measured in a first position of the keyways (6) to be measured, then operating a floating block (23) on a lower pressing block (21) to clamp the detection block (25), then adjusting micrometer gauges on two sides to be attached to two sides of the floating block (23), setting display data of an angle measuring instrument (31) to be zero, and recording readings D1 and D1 on the micrometer gauges I and II, wherein the symmetry deviation delta 1= (D1-D1)/2 of the keyways (6) to be measured in the first position can be obtained at the moment, and defaulting the angle A1=0 DEG of the keyways (6) to be measured in the first position;
then placing the detection block (25) in a second keyway (6) to be detected of the part (4) to be detected, operating the floating block (23) to clamp the detection block (25), adjusting the micrometer on two sides to be attached to two sides of the floating block (23), recording readings D2 and D2 on the micrometer I and the micrometer II, and recording data A2 on the goniometer, wherein the symmetry degree deviation delta 2= (D2-D2)/2 of the second keyway (6) to be detected can be obtained at the moment, and obtaining the angle deviation A2 of the second keyway (6) to be detected relative to the first keyway;
then, sequentially detecting third and fourth key grooves (6) to be detected on the shaft according to the method to respectively obtain symmetry degree deviations delta 3 and delta 4 of the third and fourth key grooves (6) to be detected and angle deviations A3 and A4 of the third and fourth key grooves; therefore, the method can be used for detecting symmetry and angles of a plurality of key grooves (6) to be detected on the same shaft uniformly and with high precision.
2. The method for detecting symmetry and angular deviation of shaft hole keyways according to claim 1, wherein the positioning assembly (1) comprises a V-shaped table (11), and the part (4) to be detected is mounted on a V-shaped groove (12) of the V-shaped table (11).
3. The method for detecting symmetry and angular deviation of shaft hole keyways according to claim 2, wherein a boss (22) matched with the notch of the V-shaped groove (12) is fixed on one side of the lower pressing block (21) close to the V-shaped groove (12).
4. The method for detecting symmetry and angular deviation of shaft hole keyways according to claim 2, wherein the positioning assembly (1) comprises an installation table (13), and an installation chute (14) matched with the V-shaped table (11) is formed in the installation table (13).
5. The method for detecting symmetry and angular deviation of shaft hole keyways according to claim 4, wherein the notch of the installation chute (14) is provided with a drop-preventing stopper (15) for preventing the V-shaped table (11) from dropping off.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210067726.1A CN114383490B (en) | 2022-01-20 | 2022-01-20 | Shaft hole key groove symmetry and angle deviation detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210067726.1A CN114383490B (en) | 2022-01-20 | 2022-01-20 | Shaft hole key groove symmetry and angle deviation detection device |
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| CN114383490A CN114383490A (en) | 2022-04-22 |
| CN114383490B true CN114383490B (en) | 2024-03-08 |
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| RU2229098C1 (en) * | 2002-11-28 | 2004-05-20 | Тверской государственный технический университет | Apparatus for measuring parameters of spline groove of shaft |
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| RU154812U1 (en) * | 2015-04-13 | 2015-09-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" | SHAFT SYMMETRICITY CONTROL DEVICE FOR SHAFT |
| CN206989872U (en) * | 2017-07-04 | 2018-02-09 | 重庆美心翼申机械股份有限公司 | A kind of flat key groove symmetry degree gauge |
| CN207472181U (en) * | 2017-11-06 | 2018-06-08 | 江麓机电集团有限公司 | A kind of axis key grooves symmetry degree gauge |
| CN208012486U (en) * | 2018-04-10 | 2018-10-26 | 常州机电职业技术学院 | The position degree detection apparatus of automobile generator claw pole |
| CN209459577U (en) * | 2019-04-12 | 2019-10-01 | 常州信息职业技术学院 | A kind of key-groove symmetry tester of axis |
| CN212432024U (en) * | 2020-04-26 | 2021-01-29 | 江苏博帝克精密机械有限公司 | Precision part symmetry detection device |
| CN212620539U (en) * | 2020-07-03 | 2021-02-26 | 重庆腾润电子设备有限公司 | Keyway angle testing arrangement |
| CN213147688U (en) * | 2020-11-03 | 2021-05-07 | 深圳市飞托克实业有限公司 | Symmetry degree checking fixture for valve rod groove of valve ball |
| CN215217471U (en) * | 2021-05-31 | 2021-12-17 | 刘香妤 | Shaft type machine part flat key keyway symmetry detection device |
| CN215572642U (en) * | 2021-05-31 | 2022-01-18 | 刘香妤 | Convenient detecting instrument for symmetry degree of flat key and key groove in hole of mechanical part |
| CN215413678U (en) * | 2021-06-08 | 2022-01-04 | 南京华实齿轮传动设备有限公司 | Gear keyway angle measuring device |
| CN113929284A (en) * | 2021-12-02 | 2022-01-14 | 蚌埠凯盛工程技术有限公司 | Annealing kiln roll table accurate positioning roll changing device |
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